JPS63116800A - Treatment of sludge and waste water or the like - Google Patents
Treatment of sludge and waste water or the likeInfo
- Publication number
- JPS63116800A JPS63116800A JP61262169A JP26216986A JPS63116800A JP S63116800 A JPS63116800 A JP S63116800A JP 61262169 A JP61262169 A JP 61262169A JP 26216986 A JP26216986 A JP 26216986A JP S63116800 A JPS63116800 A JP S63116800A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- wastewater
- chelating agent
- treatment
- enzyme
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 200
- 239000002351 wastewater Substances 0.000 title claims abstract description 68
- 239000002738 chelating agent Substances 0.000 claims abstract description 45
- 238000005273 aeration Methods 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000001301 oxygen Substances 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 11
- 102000004190 Enzymes Human genes 0.000 claims description 77
- 108090000790 Enzymes Proteins 0.000 claims description 77
- 229940088598 enzyme Drugs 0.000 claims description 77
- 238000000034 method Methods 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 239000000126 substance Substances 0.000 claims description 21
- 230000003301 hydrolyzing effect Effects 0.000 claims description 20
- 208000005156 Dehydration Diseases 0.000 claims description 15
- 230000018044 dehydration Effects 0.000 claims description 15
- 238000006297 dehydration reaction Methods 0.000 claims description 15
- 108091005804 Peptidases Proteins 0.000 claims description 10
- 150000003863 ammonium salts Chemical class 0.000 claims description 9
- 108010065511 Amylases Proteins 0.000 claims description 8
- 102000013142 Amylases Human genes 0.000 claims description 8
- 102000004157 Hydrolases Human genes 0.000 claims description 8
- 108090000604 Hydrolases Proteins 0.000 claims description 8
- 239000004365 Protease Substances 0.000 claims description 8
- 239000004382 Amylase Substances 0.000 claims description 7
- 101710130006 Beta-glucanase Proteins 0.000 claims description 7
- 108090001060 Lipase Proteins 0.000 claims description 7
- 102000004882 Lipase Human genes 0.000 claims description 7
- 239000004367 Lipase Substances 0.000 claims description 7
- 235000019418 amylase Nutrition 0.000 claims description 7
- 235000019421 lipase Nutrition 0.000 claims description 7
- 108010059892 Cellulase Proteins 0.000 claims description 6
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 claims description 6
- 229940106157 cellulase Drugs 0.000 claims description 6
- 235000019419 proteases Nutrition 0.000 claims description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical class OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 5
- 159000000000 sodium salts Chemical class 0.000 claims description 5
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical class OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 abstract description 23
- 238000011105 stabilization Methods 0.000 abstract description 23
- 238000002156 mixing Methods 0.000 abstract description 5
- 244000005700 microbiome Species 0.000 description 17
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 12
- 230000029087 digestion Effects 0.000 description 12
- 229910052698 phosphorus Inorganic materials 0.000 description 12
- 239000011574 phosphorus Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 239000010801 sewage sludge Substances 0.000 description 11
- 235000019645 odor Nutrition 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000012545 processing Methods 0.000 description 9
- 238000004065 wastewater treatment Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000002195 synergetic effect Effects 0.000 description 7
- 210000004027 cell Anatomy 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 239000013505 freshwater Substances 0.000 description 5
- 239000010800 human waste Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000005416 organic matter Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 208000035404 Autolysis Diseases 0.000 description 4
- 206010057248 Cell death Diseases 0.000 description 4
- 102000035195 Peptidases Human genes 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- -1 alkali metal salts Chemical class 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 230000028043 self proteolysis Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000002255 enzymatic effect Effects 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 235000018102 proteins Nutrition 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 150000003384 small molecules Chemical class 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 108090000371 Esterases Proteins 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 description 2
- DXGKKTKNDBFWLL-UHFFFAOYSA-N azane;2-[bis(carboxymethyl)amino]acetic acid Chemical compound N.N.N.OC(=O)CN(CC(O)=O)CC(O)=O DXGKKTKNDBFWLL-UHFFFAOYSA-N 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 210000000170 cell membrane Anatomy 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000006911 enzymatic reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 244000052769 pathogen Species 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000005070 ripening Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 235000000346 sugar Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- RNMCCPMYXUKHAZ-UHFFFAOYSA-N 2-[3,3-diamino-1,2,2-tris(carboxymethyl)cyclohexyl]acetic acid Chemical compound NC1(N)CCCC(CC(O)=O)(CC(O)=O)C1(CC(O)=O)CC(O)=O RNMCCPMYXUKHAZ-UHFFFAOYSA-N 0.000 description 1
- 241001474374 Blennius Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229920001503 Glucan Polymers 0.000 description 1
- 229920002527 Glycogen Polymers 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 229920000715 Mucilage Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 108090000637 alpha-Amylases Proteins 0.000 description 1
- 102000004139 alpha-Amylases Human genes 0.000 description 1
- 229940024171 alpha-amylase Drugs 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000001014 amino acid Nutrition 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 108010019077 beta-Amylase Proteins 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000005515 coenzyme Substances 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 229940111205 diastase Drugs 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 229940096919 glycogen Drugs 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003219 hemolytic agent Substances 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229960003330 pentetic acid Drugs 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000019833 protease Nutrition 0.000 description 1
- 230000029983 protein stabilization Effects 0.000 description 1
- 229940024999 proteolytic enzymes for treatment of wounds and ulcers Drugs 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- ZAWGLAXBGYSUHN-UHFFFAOYSA-M sodium;2-[bis(carboxymethyl)amino]acetate Chemical compound [Na+].OC(=O)CN(CC(O)=O)CC([O-])=O ZAWGLAXBGYSUHN-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
く産業上の利用分野〉
本発明は溶解性や懸濁性の有は物質を含有する性別性汚
泥又は有機性廃水の処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for treating sludge or organic wastewater containing soluble or suspended substances.
〈従来の技術〉
従来、下水汚泥、し尿等の溶解性や懸濁性の有機物質を
含有する有機性汚泥、特に廃水処理として常用されてい
る活性汚泥法等から生ずる余剰汚泥は、直接脱水される
か嫌気性消化又は好気ｉ１消化の後脱水され、その脱水
汚泥は屹燥又は焼却されて最終処分又は肥料等に有効利
用されている。<Conventional technology> Conventionally, organic sludge containing soluble and suspended organic substances such as sewage sludge and human waste, especially surplus sludge generated from activated sludge methods commonly used for wastewater treatment, have been directly dewatered. The sludge is dehydrated after anaerobic digestion or aerobic I1 digestion, and the dehydrated sludge is dried or incinerated for final disposal or for effective use as fertilizer.
上記嫌気性消化又は好気性消化は、有は貿汚泥の有機質
分を減容し脱水性を向上すると共に生汚泥を臭気、腐敗
、病原生物などの好ましくない状態から改善する汚泥の
安定化を目的として行なわれている。しかし、その処理
には嫌気性消化では３０〜９０日、好気性消化では６〜
３０日の長期の日数を要している。The purpose of anaerobic digestion or aerobic digestion is to reduce the volume of organic matter in trade sludge, improve dewatering properties, and stabilize raw sludge by improving its odor, putrefaction, pathogenic organisms, and other undesirable conditions. It is being carried out as However, it takes 30 to 90 days for anaerobic digestion and 6 to 90 days for aerobic digestion.
It takes a long time of 30 days.
しかも、好気性消化は現在主にし尿で行なわれているの
みであるが、負荷を上げその処理口数を短くすると、余
剰汚泥の発生足が多くなってくるのである。Furthermore, although aerobic digestion is currently carried out mainly using human waste, increasing the load and shortening the number of ports to be treated will result in more surplus sludge being generated.
また最近では特開昭５８−７４１８５号公報、特開昭５
０−２２４６２号公報、特開昭５０−９０１．’１４号
公報、特開昭５３−１７５８０号公報等に見られる如く
、上記嫌気性消化や好気性消化を行なう際に酵素を添加
し、その処理日数を短くすることか提案されている。Recently, Japanese Patent Application Laid-Open No. 58-74185,
Publication No. 0-22462, JP-A-50-901. As seen in Japanese Patent Publication No. '14 and Japanese Unexamined Patent Publication No. 53-17580, it has been proposed to add enzymes during the anaerobic digestion and aerobic digestion to shorten the processing time.
一方、層殺揚１食品工場等からの有は物質を含む有機性
廃水は、前述の如く一般に微生物（活性汚泥）により生
物学的方法で処理されており、特に高濃度の廃水は多量
の稀釈水で稀釈した後、活性汚泥法等によって処理され
ている。On the other hand, organic wastewater containing substances from food factories, etc., is generally treated by biological methods using microorganisms (activated sludge), as mentioned above, and wastewater with particularly high concentrations is treated by diluting a large amount of water. After diluting with water, it is treated by activated sludge method, etc.
〈発明が解決しようとする問題点〉
上記の処理日数を短縮する目的で提案されている酵素添
加による嫌気性消化法又は好気性消化法でも、例えば、
特開昭５８−７４１８５号のものは処理日数が２０〜３
０日、特開昭５０−２２４６２号のものは６〜１３日と
なっており、余剰汚泥やし尿の如く比較的微生物細胞の
多い汚泥消化の処理は、酵素添加を行なってもいまだ多
くの日数を要し、短時間で処理を行なわせるためには多
量の酵素添加が必要で、実際にはこの酵素添加による処
理は、はとんど採用されていないのが実情である。<Problems to be solved by the invention> Even with the anaerobic digestion method or aerobic digestion method using enzyme addition, which has been proposed for the purpose of shortening the processing time, for example,
The processing time for JP-A-58-74185 is 20 to 3 days.
0 days, and that of JP-A No. 50-22462 is 6 to 13 days. Even with the addition of enzymes, it still takes many days to digest sludge that contains relatively many microbial cells, such as surplus sludge and human waste. In order to carry out the treatment in a short time, it is necessary to add a large amount of enzyme, and in reality, this treatment by adding enzymes is rarely used.
しかも、これら方法では、酵素によって高分子化合物が
低分子化され、その低分子化合物を微生物が資化するこ
とによって微生物増殖が行なわれ、比較的小ざな細胞が
多く出来る。そのため、汚泥の分離性、沈降性、脱水性
等に好ましくない影響が誘起され、後処理（汚泥濃縮。Moreover, in these methods, a high molecular compound is reduced to a low molecular weight by an enzyme, and the low molecular compound is assimilated by microorganisms, thereby causing microbial growth and producing a large number of relatively small cells. As a result, unfavorable effects are induced on sludge separation, sedimentation, dewatering, etc., resulting in post-treatment (sludge thickening).
脱水等の工程）に悪い影響を及ぼす問題がある。There is a problem that it has a negative impact on the process (such as dehydration).
ざらに、前述したように消化処理日数を短くすればする
ほど余剰汚泥が新たに発生する。Roughly speaking, as mentioned above, the shorter the number of days for digestion treatment, the more excess sludge will be generated.
また特開昭５３−１７５８０号の如く、その伯の有懇性
汚泥に酵素を添加する方法においても酵素によって濾過
性、脱水性を向上させているが、有機物質の減容、その
他臭気、腐敗、病原生物などの好ましくない状態を改善
させるだめの汚泥の安定化については考慮されていない
。また、短時間に処理を行なわせるためには、多量の酵
素添加が必要となる。さらに酵素を触媒とし効果的に処
理を行なわしめる為に３０〜６０℃の温度条件下で行な
わせるので、外部からの加熱等のエネルギーが非常に多
く必要となる。Furthermore, in the method of adding enzymes to sludge as disclosed in Japanese Patent Application Laid-Open No. 53-17580, the filtration performance and dewatering performance are improved by enzymes, but the volume reduction of organic substances, other odors, and putrefaction. However, no consideration is given to stabilizing the sludge, which would improve undesirable conditions such as pathogenic organisms. Furthermore, in order to perform the treatment in a short time, it is necessary to add a large amount of enzyme. Furthermore, in order to carry out the treatment effectively using an enzyme as a catalyst, the treatment is carried out at a temperature of 30 to 60° C., so a large amount of energy such as external heating is required.
一方、有職性廃水の処理においても、廃水中の右派物質
を分解する微生物が多量に増殖し、余剰汚泥として処理
系外に排出する必要があり、前述の如き余剰汚泥の処理
が問題となる。ざらに高濃度の廃液は多量の稀釈水が必
要となる。On the other hand, in the treatment of occupational wastewater as well, microorganisms that decompose the substances in the wastewater proliferate in large quantities, and it is necessary to discharge the surplus sludge outside the treatment system, which poses a problem in the treatment of the surplus sludge as described above. A large amount of dilution water is required for highly concentrated waste liquid.
本発明は、このような問題点に鑑み、汚泥又は廃水の処
理において、汚泥、廃水中の有機物質の減容化、安定化
、汚泥の脱水性の向上等の処理をわずかな酵素で非常に
短時間に行なえると共に、その処理系からの新たな汚泥
（余剰汚泥）の発生を防止できるような汚泥又は廃水の
処理方法を提供することを目的としてなされたものでお
る。In view of these problems, the present invention has been developed to significantly reduce the volume of organic substances in sludge and wastewater, stabilize them, and improve the dehydration properties of sludge using a small amount of enzymes in the treatment of sludge or wastewater. The purpose of this invention is to provide a method for treating sludge or wastewater that can be carried out in a short time and can prevent the generation of new sludge (excess sludge) from the treatment system.
〈問題点を解決するための手段〉
本発明の第１の発明によれば、有機物質を含有する汚泥
又は廃水にキレート剤と加水分解酵素を添加し、酸素含
有ガスを通気して処理することによって、減容化、安定
化されかつ脱水性が良好で臭気も低減された処理汚泥を
１ｑることができる。<Means for Solving the Problems> According to the first aspect of the present invention, a chelating agent and a hydrolytic enzyme are added to sludge or wastewater containing organic substances, and oxygen-containing gas is aerated to treat the sludge or wastewater. As a result, 1 q of treated sludge can be produced which has been reduced in volume, stabilized, has good dewaterability, and has reduced odor.
従って、上記した酵素を用いる有は質の安定化処理によ
り得られた処理汚泥に脱水処理を施す場合には、脱水汚
泥の吊が従来より少なくなり、その含水率も低くするこ
とができる。Therefore, when dewatering treated sludge obtained by quality stabilization treatment using the above-mentioned enzymes, the amount of dehydrated sludge suspended is less than before, and its water content can be lowered.
本発明の第２の発明においては、右は物質を含有する廃
水に、後段の生物学的処理施設からの余剰汚泥を混合し
てこの混合物に上記したＭ素首は質安定化処理を施し、
得られた処理汚泥に脱水処理を施したのち、その分離水
を前記生物学的処理ＩＭ設で処理する。これによって廃
水の前処理と余剰汚泥の処理とを同時に行なうことがで
きる。In the second invention of the present invention, the wastewater containing the substance shown on the right is mixed with surplus sludge from the biological treatment facility in the latter stage, and this mixture is subjected to the above-mentioned quality stabilization treatment,
After dewatering the obtained treated sludge, the separated water is treated in the biological treatment IM facility. This allows pretreatment of wastewater and treatment of excess sludge to be carried out simultaneously.
本発明の第３の発明においては、有機物質を含有する廃
水を生物学的処理施設で処理すると共に、この生物学的
処理施設から排出される汚泥に上記した酵素有機質安定
化鷺理を施し、得られた処理汚泥を前記生物学的処理施
設に返送する。これによって生物学的処理施設からの余
剰汚泥の発生もほとんどなく廃水の処理を行なうことが
できる。In the third invention of the present invention, wastewater containing organic substances is treated in a biological treatment facility, and the sludge discharged from the biological treatment facility is subjected to the above-mentioned enzyme organic substance stabilization treatment, The obtained treated sludge is returned to the biological treatment facility. As a result, wastewater can be treated with almost no surplus sludge generated from the biological treatment facility.
くイ乍 用〉
上記したごとき本発明による酵素有機質安定化処理にお
いては、添加した７ＪＤ水分解Ｍ素とその酵素の作用を
助けるキレート剤と通気との相乗作用によって、通気の
み施した場合にみられるような新たな汚泥の発生（微生
物の増殖）もほとんどなしに汚泥の有殿質分が分解され
て減容化される。しかも、このときの分解熱によって、
外部から熟エネルギーを供給せずとも、あるいは少量の
供給でＭ素反応系を適温に維持することができる。かく
して汚泥の減容化、安定化、ざらには汚泥の脱水性の向
上や臭気の改善がきわめて短時間の処理でなされる。In the enzyme-organic stabilization treatment according to the present invention as described above, due to the synergistic effect of the added 7JD water-splitting M element, the chelating agent that helps the action of the enzyme, and aeration, it is possible to stabilize the enzyme when only aeration is applied. The precipitate content of the sludge is decomposed and the volume is reduced with almost no generation of new sludge (growth of microorganisms). Moreover, due to the heat of decomposition at this time,
The M element reaction system can be maintained at an appropriate temperature without externally supplying ripening energy or by supplying a small amount of ripening energy. In this way, sludge volume reduction and stabilization, as well as improved sludge dewatering performance and odor improvement, can be achieved in an extremely short period of time.
〈実施例〉 以下、図面を参照して本発明の詳細な説明する。<Example> Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図は本発明の第１の発明に係る第１実施例を示す説
明図で、本発明の処理方法を有機性汚泥の！２ａ理に適
用した例である。FIG. 1 is an explanatory diagram showing a first embodiment of the first invention of the present invention, in which the treatment method of the present invention is applied to organic sludge. This is an example applied to Principle 2a.
本実施例は、本発明の第１の発明に係る酵素有椴質安定
化工程１０とこれに付随する脱水処理工程１１と分離水
処理工程１２とからなっている。This example consists of an enzyme-containing protein stabilization step 10, an accompanying dehydration treatment step 11, and a separated water treatment step 12 according to the first aspect of the present invention.
このＭ素行１１１支定化工程１０の装置構成は、反応器
１０１と、この反応器１０１に接続し被処理物である右
は性汚泥を供給する供給管１０２及び酵素供、袷管１０
３と、上記供給管１０２に連通するキレート剤供給管１
０４と、上記反応器の被処理物中に酸素含有ガスを通気
する通気手段１０５と、上記反応器１０１から処理物を
１友出し一時貯留して次工程に送るための扱出管１０６
、貯１ｇ１０７及びポンプ１０８からなっている。The equipment configuration of this M conduction 111 stabilization step 10 includes a reactor 101, a supply pipe 102 connected to the reactor 101 and supplying the treated sludge, and an enzyme supply pipe 10.
3, and a chelating agent supply pipe 1 communicating with the supply pipe 102.
04, a ventilation means 105 for aerating oxygen-containing gas into the material to be treated in the reactor, and a handling pipe 106 for taking out the material to be treated from the reactor 101, temporarily storing it, and sending it to the next process.
, a reservoir 107 and a pump 108.
本実施例の上記通気手段１０５は、−喘が上記反応器１
０１の底部で連通接続し他端が該反応器１０１の頂部に
至る循環ライン１０９と、該循環ライン１０９に介装さ
れた循環ポンプ１１０と、該循環ライン１０９の他端に
接続され反応器１０１頂部に設けられたエジェクター１
１１と、このエジェクター１１１に一端が連通され他端
から空気を吸入する空気吸入管１１２と、エジェクター
１１１の出口に連通し反応器１０１に貫設されて下方に
向けられたノズル１１３とによって構成されている。The ventilation means 105 of this embodiment is provided in the reactor 1.
A circulation line 109 that is connected to the bottom of the reactor 101 and whose other end reaches the top of the reactor 101, a circulation pump 110 that is interposed in the circulation line 109, and a circulation pump 110 that is connected to the other end of the circulation line 109 and connected to the reactor 101. Ejector 1 installed at the top
11, an air suction pipe 112 that communicates with the ejector 111 at one end and sucks air from the other end, and a nozzle 113 that communicates with the outlet of the ejector 111 and extends through the reactor 101 and is directed downward. ing.
尚、図中付号１１４は、空気吸入管１１２に介装され、
反応器１０１内の被処理物を所定の温度に維持する温度
制御装首１１５の制御信号によって作動する吸入空気ｔ
ｉｌ制御弁である。また１１６は、反応器１０１に内股
され反応器入口から流入した被処理物がすぐに反応器出
口に向うショートバスを防止するバッフル板である。ま
た１１７．１１８は反応器１０１および貯（ｉ１０７に
それぞれ設けられたベントであり、１１９は貯槽１０７
の撹拌別である。In addition, the number 114 in the figure is interposed in the air intake pipe 112,
Intake air t operated by a control signal of a temperature control neck 115 that maintains the material to be treated in the reactor 101 at a predetermined temperature
It is an il control valve. Reference numeral 116 denotes a baffle plate which is placed inside the reactor 101 and prevents a short bath in which the material to be treated, which has flowed in from the reactor inlet, immediately heads towards the reactor outlet. In addition, 117 and 118 are vents provided in the reactor 101 and the storage tank (i107), and 119 is a vent installed in the storage tank 107.
The stirring is separate.
まず、初沈汚泥や余剰汚泥などからなる下水汚泥又はし
尿若しくはその他店性汚泥装置からの余剰汚泥等の有機
性汚泥は、必要により図示しない加圧浮上、遠心分離、
重力分離等の濃縮手段で適宜温度に調整された後、供給
管１０２を介して反応器１０１に供給される。この供給
管１０２途中においては、キレート剤供給管１０４から
清水に溶解したキレート剤が供給され、上記有機性汚泥
と混合される。そして反応器１０１に供給される有機性
汚泥の供給量に応じて、清水に溶解させた酵素が酵素供
給管１０３から反応器１０１に供給され、上記有は性汚
泥に混入される。First, organic sludge such as sewage sludge, human waste, or other surplus sludge from store sludge equipment, including initial settling sludge and surplus sludge, is processed by pressure flotation (not shown), centrifugation, etc., as necessary.
After being adjusted to an appropriate temperature by concentration means such as gravity separation, it is supplied to the reactor 101 via the supply pipe 102. In the middle of this supply pipe 102, a chelating agent dissolved in fresh water is supplied from a chelating agent supply pipe 104 and mixed with the organic sludge. Then, depending on the amount of organic sludge supplied to the reactor 101, enzymes dissolved in fresh water are supplied to the reactor 101 from the enzyme supply pipe 103, and the enzymes are mixed into the organic sludge.
上記キレート剤とは、アンモニアまたはアミン（特にモ
ノまたはジアミン）の各窒素原子に少なくとも２個のカ
ルボキシアルギル（特にメチルまたはエチル）基を有し
て金属イオンに対するキレート化作用を持つ化合物でお
り、本発明においては遊離の酸または可溶性塩が対象と
なり特にアルカリ金属塩（主にすトリウム塩）若しくは
アンモニウム塩が有効である。The above-mentioned chelating agent is a compound having at least two carboxyargyl (especially methyl or ethyl) groups on each nitrogen atom of ammonia or amine (especially mono- or diamine) and has a chelating effect on metal ions, In the present invention, free acids or soluble salts are targeted, and alkali metal salts (mainly sodium salts) or ammonium salts are particularly effective.
代表的なキレート剤としては、ＦＤＴＡと略称されるエ
チレンジアミン四酢酸又はそのアルカリ金属塩若しくは
アンモニウム塩、ＮＴＡと略称されるニトリロ三酢酸又
はそのアルカリ金属塩若しくはアンモニウム塩、ＣｙＤ
ＴＡと略称されるシクロヘキザンジアミン四酢酸又はそ
のアルカリ金属塩若しくはアンモニウム塩、ＤＴＰＡと
略称されるジエチレントリアミン五酢駿又はそのアルカ
リ塩若しくはアンモニウム塩等が挙げられる。好ましく
はＥＤＴＡ若しくはそのナトリウム塩又はＮＴＡ若しく
はそのアンモニウム塩を使用する。本発明においてはこ
れらキレート剤を単独または混合して使用することがで
きる。Typical chelating agents include ethylenediaminetetraacetic acid or its alkali metal salt or ammonium salt, abbreviated as FDTA, nitrilotriacetic acid or its alkali metal salt or ammonium salt, abbreviated as NTA, CyD.
Examples include cyclohexanediaminetetraacetic acid or its alkali metal salt or ammonium salt, abbreviated as TA, and diethylenetriaminepentaacetic acid or its alkali salt or ammonium salt, abbreviated as DTPA. Preferably EDTA or its sodium salt or NTA or its ammonium salt is used. In the present invention, these chelating agents can be used alone or in combination.
また上記酵素とは、少なくとも加水分解酵素とその地被
処理物の性状に応じて必要により適宜加えられるＶｆ素
又は補酵素とからなるものでおる。この発明でいう上記
加水分解酵素とは、ヒドロラーゼともいわれ、加水分解
反応△−Ｂ＋Ｈ２０→△ＯＨ＋ＢＨ
を触媒（接触）する種々の酵素をいう。本発明で特に好
ましく使用できる代表的な加水分解酵素としては、プロ
テアーゼ、アミラーゼ、エステラーゼ（特にリパーゼ）
、グルカナーゼ（待にβ−グルカナーゼ）、セルラーゼ
等が挙げられる。このプロテアーゼは、タンパク質分解
酵素ともいわれ、タンパク質およびペプチドを分解する
酵素でペプチターゼ、プロテア−ゼがあり、全生物にわ
たって多種多様なものが存在する。アミラーゼは、ジア
スターゼともいわれ、デン粉、グリコーゲンなどを加水
分解する酵素でα−アミラーゼ、β−アミラーゼ、糖化
型アミラーゼ等があり、微生物体内及び植物種子、地下
茎および塊根などに広く存在している。リパーゼはエス
テラーゼの１種で脂肪の加水分解を触媒（接触〉する酵
素で、動植物界に広く分布し例えば植物の種子、茎・葉
、カビ類、細菌などに存在する。β−グルカナーゼはグ
ルコースから成る多糖類のグルカン結合を加水分解する
酵素でおり、動物の消化管、植物、海藻類、細菌などに
存在する。またセルラーゼはセルロースの加水分解を触
媒（接触）する配索であり、動物消化管内、カビ類、細
菌、原虫、植物などに存在する。Further, the above-mentioned enzyme consists of at least a hydrolase and a Vf element or a coenzyme which is added as appropriate depending on the properties of the ground material to be treated. The hydrolase used in this invention is also called hydrolase, and refers to various enzymes that catalyze (contact) the hydrolysis reaction Δ-B+H20→ΔOH+BH. Typical hydrolytic enzymes that can be particularly preferably used in the present invention include protease, amylase, and esterase (especially lipase).
, glucanase (particularly β-glucanase), cellulase, and the like. Proteases are also called proteolytic enzymes, and include peptidases and proteases that decompose proteins and peptides, and a wide variety of them exist throughout all living organisms. Amylase, also called diastase, is an enzyme that hydrolyzes starch, glycogen, etc., and includes α-amylase, β-amylase, saccharified amylase, etc., and is widely present in microorganisms, plant seeds, underground stems, and tubers. Lipase is a type of esterase and is an enzyme that catalyzes (contacts) the hydrolysis of fat.It is widely distributed in the animal and plant kingdom, and is present in plant seeds, stems and leaves, molds, bacteria, etc.β-glucanase is an enzyme that catalyzes (contacts) hydrolysis of fat. Cellulase is an enzyme that hydrolyzes glucan bonds in polysaccharides, and is present in animal digestive tracts, plants, seaweed, bacteria, etc. Cellulase is a cable that catalyzes (contacts) the hydrolysis of cellulose, Exists in tubes, molds, bacteria, protozoa, plants, etc.
本発明においては、これら加水分解酵素を被処理物の性
状に応じて単独又は混合して使用することができる。In the present invention, these hydrolytic enzymes can be used alone or in combination depending on the properties of the object to be treated.
そして上記キレート剤の添加重量割合は、供給されてく
る被処理物である有機性汚泥の乾物型苗（ＪＩＳ ＫＯ
１０２１４゜２の全蒸発残留物に相当）に対して０．０
０１〜０．５％好ましくは０．００５〜０．５％であり
、上記加水分解酵素の添加重帛割合は、供給される被処
理物の乾物重分に対して０．０１〜１％好ましくは０．
１〜１％であるが、これらキレ−１へ剤及び加水分解酵
素は添加量に応じてそれなりの作用効果を発現しうるち
のであるため、特に上記した添加割合に限定する必要は
ない。The weight ratio of the chelating agent added is based on the dry matter type seedling (JIS KO
0.0 for the total evaporation residue (equivalent to 10214°2)
01 to 0.5%, preferably 0.005 to 0.5%, and the weight ratio of the hydrolase added is preferably 0.01 to 1% based on the dry weight of the material to be treated. is 0.
Although the addition ratio is 1 to 1%, it is not necessary to specifically limit the addition ratio to the above-mentioned addition ratio since these KIRE-1 hemolytic agents and hydrolytic enzymes can exhibit a certain effect depending on the amount added.
なあ、上記有機性汚泥、キレート剤および加水分解酵素
の反応器１０１への供給方法は、本実施例では、キレー
ト剤と有機性汚泥とをライン混合したが、この例に限定
されず、有償性汚泥、キレ−１・剤、および加水分解Ｖ
素を個別にあるいは同時に反応器に入れてもよく、ざら
には反応器を２段にし、第１の反応器にキレート剤と有
機性汚泥とを入れ十分に攪拌混合し、その後第２の反応
器においてキレート剤が混入された有機性汚泥に加水分
解酵素を添加してもよい。Incidentally, the method for supplying the organic sludge, chelating agent, and hydrolyzing enzyme to the reactor 101 is that in this example, the chelating agent and organic sludge are mixed on a line, but the method is not limited to this example, and may be provided by a paid method. Sludge, clean-1 agent, and hydrolyzed V
The chelating agent and the organic sludge may be put into the reactor individually or simultaneously.In general, the reactor is made into two stages, and the chelating agent and organic sludge are put into the first reactor and thoroughly stirred and mixed, and then the second reaction is started. Hydrolytic enzymes may be added to organic sludge mixed with a chelating agent in a vessel.
なお、上記被処理物である有機性汚泥の反応器１０１又
は上記第２の反応器への供給方法は数分間の間欠供給が
好ましい。Note that the method of supplying the organic sludge, which is the material to be treated, to the reactor 101 or the second reactor is preferably intermittent supply for several minutes.
かくして、キレート剤並びに加水分解酵素及びその他適
宜選定された酵素を添加された反応器１０１内の有機性
汚泥は、循環ポンプ１１０により反応器底部から引き恢
かれ、循環ライン１０９を通りエジェクター１１１に至
り、該エジェクター１１１により空気吸入管１１２を介
して供給される空気と混合された後、ノズル１１３より
反応器１０１内に吐出される。これによって上記有機性
汚泥に対して酸素含有ガスの通気が激しく行なわれる。Thus, the organic sludge in the reactor 101 to which the chelating agent, hydrolytic enzyme, and other appropriately selected enzymes have been added is drawn from the bottom of the reactor by the circulation pump 110, passes through the circulation line 109, and reaches the ejector 111. After being mixed with air supplied through the air suction pipe 112 by the ejector 111, it is discharged into the reactor 101 from the nozzle 113. As a result, oxygen-containing gas is vigorously aerated into the organic sludge.
反応器１０１の有機性汚泥を斯くの如く処理すると、上
記通気とレキート剤と加水分解酵素との相乗作用により
、通気による新たな汚泥の発生（微生物の増殖）もほと
／υどなしに、汚泥の有機質分が分解減容（消化）され
、しかもこの分解熱により酵素反応に適した温度をおる
程度保持出来、汚泥の安定化及び汚泥の脱水性の向上が
、わずかの酵素で非常に短時間に）ヱ成される。When the organic sludge in the reactor 101 is treated in this manner, due to the synergistic effect of the aeration, the requit agent, and the hydrolytic enzyme, new sludge is hardly generated (microbial growth) due to aeration. The organic matter in the sludge is decomposed and reduced in volume (digested), and the heat of decomposition makes it possible to maintain a temperature that is suitable for enzymatic reactions, stabilizing the sludge and improving the dewatering properties of the sludge in a very short period of time with just a few enzymes. be formed (in time).
上記のメカニズムはまだ解明されていないか、次のよう
に推定される。The above mechanism has not yet been elucidated or is presumed as follows.
汚泥中に含まれる微生物の表面部分は、ゲル状粘質物質
、細胞壁、細胞膜でＩ？ａｒ成されているが、添加され
たキレート剤により表面部分の溝道強度が低下し、微生
物の自己消化が促進される。微生物の自己消化に伴ない
細胞壁、細胞膜部分の変質が起り、細胞内に含まれる酵
素を含む内容物の細胞外への溶出が起る。微生物の内容
物および微生物と共存する有数物質（炭水化物・脂肪酸
・蛋白質）は、添加された加水分解酵素やその他の酵素
と自己消化により溶出した酵素との相乗的作用により分
解が促進され低分子化合物（糖、アミノ酸、脂肪酸およ
びアルコール等）にまで分解され、更に残存する微生物
および上記酵素の作用により、低分子化合物がＣＯ２等
に分解するガス化が促進され処理される。添加した酵素
及び自己消化により溶出した酵素の相乗的作用により、
微生物の自己消化で溶出した内容物や微生物と共存する
有機物質の低分子化およびガス化が促進されるため、微
生物が資化（−次代用）するに必要な栄養源が不足し、
新な微生物の増殖は減少し、それに伴なう分離性、脱水
性等の低下が防止されると共に汚泥の減容化がなされる
。またキレ−１・剤の添加により、細胞表面のゲル状粘
貿の強度低下および新たな微生物の生成防止により、濾
過性、脱水性が一層改善される。The surface parts of microorganisms contained in sludge consist of gel-like mucilage, cell walls, and cell membranes. However, the added chelating agent reduces the groove strength of the surface portion and promotes self-digestion of microorganisms. As microorganisms autolyze, cell walls and cell membranes undergo deterioration, and contents including enzymes contained within the cells are eluted to the outside of the cells. The contents of microorganisms and the important substances that coexist with microorganisms (carbohydrates, fatty acids, and proteins) are decomposed into low-molecular compounds by the synergistic action of the added hydrolase and other enzymes and the enzyme eluted by autolysis. (sugars, amino acids, fatty acids, alcohols, etc.), and further, by the action of the remaining microorganisms and the enzymes mentioned above, gasification of low molecular compounds into CO2 and the like is promoted and processed. Due to the synergistic action of the added enzyme and the enzyme eluted by autolysis,
The contents eluted by microbial self-digestion and the organic substances that coexist with microorganisms are reduced in molecular weight and gasified, resulting in a lack of nutrient sources necessary for microorganisms to assimilate (-substitute).
The growth of new microorganisms is reduced, and the associated deterioration in separation performance, dehydration performance, etc. is prevented, and the volume of sludge is reduced. Furthermore, the addition of KIRE-1 agent reduces the strength of the gel-like viscosity on the cell surface and prevents the generation of new microorganisms, thereby further improving filtration and dehydration properties.
この様に添加した酵素とその酵素の作用を助けるキレー
ト剤と通気との相乗作用により、細胞表面の形質変化、
自己消化の促進、細胞内配素の溶出、高分子有機化合物
の低分子化、低分子化合物のガス化等の一連のサイクル
がはじめて効率よくなされるのでおる。その結果、自己
消化により溶出した酵素を有効利用できるため、従来の
酵素のみを添加する方法よりも酵素の添加伍を低減する
ことができる。さらに、低分子化合物のガス化によるネ
ルギーの生成を有効利用することにより、外部からの加
熱等の必要かなく、また必要としても少量の加熱で反応
系を適温に維持することができる。かくして汚泥の有機
質分の減容化、安定化、汚泥の脱水性の向上、臭気の改
善がきわめて短時間になされるので必ろ。Due to the synergistic effect of the enzyme added in this way, the chelating agent that supports the action of the enzyme, and aeration, the cell surface changes,
A series of cycles such as promotion of autolysis, elution of intracellular ions, conversion of high-molecular organic compounds to low-molecular weight compounds, and gasification of low-molecular-weight compounds can only be carried out efficiently. As a result, the enzyme eluted by autolysis can be used effectively, so that the amount of enzyme added can be reduced compared to the conventional method of adding only enzyme. Furthermore, by effectively utilizing energy generated by gasification of low-molecular-weight compounds, there is no need for external heating, and even if necessary, the reaction system can be maintained at an appropriate temperature with a small amount of heating. In this way, the organic content of the sludge is reduced and stabilized, the dewaterability of the sludge is improved, and the odor is improved in a very short period of time.
そして上記反応器１０１内の有機性汚泥は、温度１０〜
６０”Ｃ好ましくは３０〜６０℃，ｐＨ５〜８の条件下
で０．５ 〜１５時間の滞留時間で効率的に処理出来る
。The organic sludge in the reactor 101 has a temperature of 10 to
60" C. Preferably, the treatment can be carried out efficiently under conditions of 30 to 60 DEG C. and pH of 5 to 8, with a residence time of 0.5 to 15 hours.
有機性汚泥の温度、性状等によって異なるが、一般の下
水汚泥のごとき物であれば、反応器。It depends on the temperature, properties, etc. of the organic sludge, but if it is like general sewage sludge, a reactor is used.
１０１に供給される有機性汚泥に対して酸素９４〜１２
ｋ（］−０２／供給被処理物−ＴＩ１３に相当する酸素
含有ガス（空気では約１３．５〜４ＯＮ Ｔｌ１３−
ａｉｌ’／供給被処理物−ｍＳ）を供給してやることに
より外部からの加熱エネルギーを導入せずに上記所定の
温度を保持することができる。Oxygen 94-12 for organic sludge supplied to 101
k(]-02/Supplied material to be treated - Oxygen-containing gas equivalent to TI13 (about 13.5 to 4ON in air Tl13-
ail'/supplied material to be processed - mS), the predetermined temperature can be maintained without introducing heating energy from the outside.
また上記通気（酸素供給）により反応器１０１の有機性
汚泥の温度が所定の温度より高くなった場合、本実施例
ではこれを検知した温度制御装置１１５の制御信号によ
って、空気吸入警１１２に設けられた吸入空気制御弁１
１４が制御され、空気の供給が制限若しくは停止される
。逆に、温度が所定の温度より低くなった場合、空気供
給の停止をやめるか、その供給量を増加ざしる。Furthermore, when the temperature of the organic sludge in the reactor 101 becomes higher than a predetermined temperature due to the above-mentioned aeration (oxygen supply), in this embodiment, a control signal from the temperature control device 115 that detects this is sent to the air intake alarm 112. intake air control valve 1
14 is controlled to limit or stop the air supply. Conversely, if the temperature becomes lower than a predetermined temperature, the air supply is stopped or the amount of air supply is increased.
これにより特別な装置を必要とせず、簡単に温度制御が
出来る。またこの温度制御は、高温時には有機性汚泥の
供給を停止若しくはその供給量を少なくし、低温の時は
供給の停止をやめるか若しくはその供給量を増すことに
よっても可能である。This allows for easy temperature control without the need for special equipment. This temperature control can also be achieved by stopping the supply of organic sludge or reducing the supply amount when the temperature is high, and by ceasing to stop the supply or increasing the supply amount when the temperature is low.
なお、上記温度制御によっても、例えば有機質分濃度が
低い汚泥等の供給有機性汚泥の性状によって、所定の温
度に保持出来ない場合は、例えば供給管１０２にスチー
ムを供給し、直接的に供給有機性汚泥を７ＪＯ熱したり
、循環ライン１０９に熱交換器を設は間接的に加熱した
りする手段が必要となる。これらの制御はｊＪｔｌ熱媒
体の供給制御弁と温度制御装置１１５により可能である
。Note that even with the temperature control described above, if the temperature cannot be maintained at a predetermined level due to the properties of the supplied organic sludge, such as sludge with a low concentration of organic matter, for example, steam may be supplied to the supply pipe 102 to directly control the supplied organic sludge. A means for heating the sludge by 7JO or indirectly heating it by installing a heat exchanger in the circulation line 109 is required. These controls are possible by the jJtl heat medium supply control valve and the temperature control device 115.
上記処理条件のｐｌ−１についてはｐｉ−１５〜８の範
囲で行なうのが好ましいが、特にこのｐｌ−１範囲に制
約されるものではなく、使用する酵素の種類に応じて適
宜選定ずればよい。−！１１Ｑには本実施例の如＜ ！
’）ｌ−１調整装置をム２けザ自然の流入ｐＨで処理し
て差支えない。Regarding pl-1 of the above treatment conditions, it is preferable to perform the treatment in the range of pi-15 to 8, but it is not particularly limited to this pl-1 range, and may be selected as appropriate depending on the type of enzyme used. . -! In the 11th Q, as in this example!
') The l-1 regulator may be treated with the natural influent pH.
このようにして減容化、安定化処理された処理汚泥は、
扱出管１０６を介して一時貯槽１０７に貯留され、ポン
プ１０８によって脱水処理工程１１に送られる。The treated sludge that has been volume-reduced and stabilized in this way is
It is stored in a temporary storage tank 107 via a handling pipe 106 and sent to a dehydration treatment process 11 by a pump 108.
この脱水処理工程１１は、常法により上記処理汚泥を脱
水汚泥（脱水ケーキ）と分離水とに分離するものでおる
。通常は、フィルタープレス、真空脱水機、遠心脱水機
、ベルトフィルター等の脱水手段により行なわれるが、
前記酵素有機質安定化工程１０に供給された有機性汚泥
の固形分濃度が低い場合などには、脱水手段の前に固液
分離槽（シックナー）、加圧浮上装面等の汚泥濃縮手段
を設けるとよい。また、上記処理汚泥を脱水する際には
、例えばカチオン系ポリマーや塩化第二鉄、消石灰等の
無機凝集剤などの通常の脱水助剤を使用できる。この脱
水処理工程１１で得られる脱水汚泥の含水率は、通常５
５〜５５ｗｔ％程度になり、脱水助剤の添加最も乾燥処
理汚泥重聞の０．３〜０．５％程度でよく、酵素ｉＦＡ
質安定化工程１０に供給される汚泥を直接脱水する場合
に比べて著しく少ない星ですむ。In this dewatering step 11, the treated sludge is separated into dehydrated sludge (dehydrated cake) and separated water using a conventional method. Usually, dehydration is carried out using a filter press, vacuum dehydrator, centrifugal dehydrator, belt filter, etc.
If the solid content concentration of the organic sludge supplied to the enzyme-organic stabilization step 10 is low, a sludge concentration means such as a solid-liquid separation tank (thickener) or a pressurized flotation surface is provided before the dehydration means. Good. Further, when dewatering the above-mentioned treated sludge, common dehydration aids such as cationic polymers, ferric chloride, inorganic flocculants such as slaked lime, etc. can be used. The water content of the dehydrated sludge obtained in this dewatering process 11 is usually 5.
The amount of dehydration aid added is approximately 0.3 to 0.5% of the weight of the dried sludge.
Significantly fewer stars are required than when the sludge supplied to the quality stabilization step 10 is directly dehydrated.
脱水処理工程１１で分離された分離水は、分離水処理工
程１２に導入され、活性汚泥等の生物学的方法で処理さ
れる。この分離水は微生物により極めて短時間に処理す
ることができるものである。なお、前記酵素有機質安定
化工程１０に供給される汚泥の発生源が廃水処理施設で
ある場合は、その処理施設を分離水処理工程１２として
もよい。The separated water separated in the dehydration treatment step 11 is introduced into the separated water treatment step 12 and treated with a biological method such as activated sludge. This separated water can be treated by microorganisms in an extremely short time. Note that if the source of the sludge supplied to the enzymatic organic substance stabilization step 10 is a wastewater treatment facility, the treatment facility may be used as the separated water treatment step 12.
本実施例では、酵素付職質安定化工程１０で有機性汚泥
に対して、通気とキレート剤と加水分解酵素との相乗作
用により、非常に短時間に汚泥の安定化、減容化及び脱
水性の向上がなされ、処理汚泥は臭気もほとんどなく、
脱水処理工程１１で得られる脱水汚泥の星も少なく、ま
たその含水率も低い。In this example, in the enzyme-attached material stabilization step 10, organic sludge is stabilized, volume reduced, and dehydrated in a very short time by aeration, synergistic action of a chelating agent, and a hydrolyzing enzyme. The treated sludge has almost no odor.
The dehydrated sludge obtained in the dehydration treatment step 11 has few stars and also has a low water content.
一例として、初沈汚泥４０％と余剰汚泥６０％とからな
る下水汚泥に本実施例を適用した結果を、他の処理方式
と比較して第１表に示す。As an example, Table 1 shows the results of applying this example to sewage sludge consisting of 40% initial settling sludge and 60% surplus sludge, in comparison with other treatment methods.
第１表 下水汚泥処理における本発明と他処理方式との
比較ＴＳ ：ＪＩＳ Ｋ ０１０２ １４．２の
全蒸留残留物ＶＴＳ：ＪＩＳ Ｋ ０４０２ １４
．５の強熱減量なお、上記実施例においては通気手段を
エジェクタ一方式としたが、これに代えてジェットノズ
ル方式、散気管式、は械曝気式等の通常廃水処理で使用
されている攪拌を伴う曝気手段を用いてもよく、反応器
も単なる僧形式のものでもよい。Table 1 Comparison of the present invention and other treatment methods in sewage sludge treatment TS: Total distillation residue of JIS K 0102 14.2 VTS: JIS K 0402 14
．． Incidentally, in the above embodiment, the aeration means was a single ejector type, but instead of this, a jet nozzle type, an aeration tube type, a mechanical aeration type, etc., which are commonly used in wastewater treatment, may be used. Accompanying aeration means may be used, and the reactor may also be of the simple type.
また酸素含有ガスは空気に限定されず浪素カスを使用し
てもよいのは勿論である。さらにｎ）素首機質安定化工
程は連続式でも回分式でもよい。Furthermore, the oxygen-containing gas is not limited to air, and of course, dross residue may also be used. Furthermore, the n) neck structure stabilization step may be continuous or batchwise.
次に、本発明を高濃度の有機性廃水の処理に適用した例
を示す。Next, an example will be shown in which the present invention is applied to the treatment of highly concentrated organic wastewater.
屠殺場廃水、発酵廃液、製糖工場廃液等の高濃度の有は
性廃水の処理に際しては、一般に希釈大容量方式または
高負荷方式等の水処理設備により生物学的に処理されて
いるが、この水処理設備の前段に本発明の処理方法を粗
み込むことにより、無希釈で処理することが可能となり
、ざらには、後段の水処理設備の槽容φをＢＯＤ処理効
率を屓こなうことなく減少させることができる。When treating highly concentrated wastewater such as slaughterhouse wastewater, fermentation wastewater, and sugar factory wastewater, it is generally treated biologically using water treatment equipment such as a diluted large-capacity method or a high-load method. By applying the treatment method of the present invention to the front stage of water treatment equipment, it becomes possible to perform treatment without dilution, and in general, the tank volume φ of the water treatment equipment at the rear stage can be adjusted to determine the BOD treatment efficiency. It can be reduced without any problem.
まず、かような高温度右前性廃水の連理方法としては、
第１図に示した第１実施例と同−構成によって処理する
方法がおる。即ち第１実施例の被処理物である有機性汚
泥に代えて、これを高濃度有機性廃水として適用すれば
よいものである。この場合のキレート剤、加水分解酵素
の添加ｄについては、高濃度廃水の乾物ｆｆ１ｆｆｉに
対して第１実施例と同様に考えればよく、その他特に変
わるところがないのでその説明を省略する。First, as a method for processing such high-temperature anterolateral wastewater,
There is a method of processing using the same configuration as the first embodiment shown in FIG. That is, this can be used as highly concentrated organic wastewater in place of the organic sludge that is the object to be treated in the first embodiment. Regarding the addition d of the chelating agent and hydrolyzing enzyme in this case, the dry matter ff1ffi of the highly concentrated wastewater can be considered in the same manner as in the first embodiment, and there is no other particular difference, so the explanation thereof will be omitted.
第２図は本発明の第２の発明に係る第２実施例を示し、
第１図の装置を廃水処理に有効に適用できるようにさら
に改善したもので、前）ボした高濃度廃水の他、し尿等
にも適用出来、後段の水処理設備の負荷を下げると共に
処理系内での余剰汚泥の発生量を極力あざえるようにし
たものである。なお、第２実施例の説明に当って第１図
に示したものと同一構成部分については、同一符号を付
してその説明を省略する。FIG. 2 shows a second embodiment according to the second invention of the present invention,
The device shown in Figure 1 has been further improved so that it can be effectively applied to wastewater treatment.It can be applied not only to high-concentration wastewater (previously), but also to human waste, etc., reducing the load on downstream water treatment equipment, and reducing the burden on the treatment system. This is designed to minimize the amount of surplus sludge generated within the tank. In the description of the second embodiment, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.
まず、供給管１０２を介して導入された高濃度イ１機性
廃水は、後段に設けられた生物学的水処理施設である活
性汚泥装置２１から管２０６を介して送られて来た余剰
汚泥と混合される。この混合は第２図の様にライン混合
でもよく、また槽を設けてそこで混合してもよい。廃水
と余剰汚泥の混合物は、第１実施例と同様に酵素有機質
安定化工程１０で上記混合物の乾物ｆｆ１ｆｆｌに対し
所定量のキレート剤並びに加水分解酵素及び必要により
適宜選定されたその他の酵素が添加され、通気処理され
、脱水処理工程１１に送られる。従って、この酵素有機
質安定化工程１０では廃水の前処理と余剰汚泥の処理が
同時になされる。First, high-concentration organic wastewater introduced via the supply pipe 102 is replaced with surplus sludge sent via the pipe 206 from the activated sludge device 21, which is a biological water treatment facility installed at a later stage. mixed with. This mixing may be done by line mixing as shown in FIG. 2, or by providing a tank and mixing there. The mixture of wastewater and surplus sludge is prepared by adding a predetermined amount of a chelating agent, a hydrolytic enzyme, and other appropriately selected enzymes as necessary to the dry matter ff1ffl of the mixture in the enzyme-organic stabilization step 10 as in the first embodiment. It is then subjected to aeration treatment and sent to dehydration treatment step 11. Therefore, in this enzymatic organic matter stabilization step 10, pretreatment of wastewater and treatment of excess sludge are performed simultaneously.
脱水処理工程１１に導入された処理混合物は、第１実施
例と同様に脱水汚泥（脱水ケーキ）と分離水に分離され
、分離水は活性汚泥装置２１に送られ常法により処理さ
れる。即ち、分離水は散気管等の曝気手段２０２を有す
る活性汚泥、漕２０１で生物学的に処理された後、活性
汚泥と共に沈澱槽２０３に送られ、上澄液が処理水とし
て放流される。沈澱槽２０３に沈降した活性汚泥の一部
は、ポンプ２０４により管２０５を介して返送汚泥とし
て活性汚泥槽２０１に戻され、他の一部は余剰汚泥とし
て管２０６により前）ホの如く高濃度有機性廃水と混合
される。これにより分離水は短時間に処理される。尚、
前記活性汚泥槽２０１は、必要により例えば隔壁を槽内
に設は嫌気（脱窒）区→好気（硝化）区とした循環式硝
化脱窒法等による生物学的脱窒を行なってもよく、また
ざらに沈澱槽２０３から放流される処理水に脱リン、１
）；色好の高次連理を施してもＪ：く、従来の廃水処理
技術が利用できる。The treated mixture introduced into the dewatering process 11 is separated into dehydrated sludge (dehydrated cake) and separated water as in the first embodiment, and the separated water is sent to the activated sludge device 21 and treated in a conventional manner. That is, after the separated water is biologically treated in an activated sludge tank 201 having an aeration means 202 such as an aeration pipe, it is sent together with the activated sludge to a settling tank 203, and the supernatant liquid is discharged as treated water. A part of the activated sludge that has settled in the settling tank 203 is returned to the activated sludge tank 201 as return sludge via a pipe 205 by a pump 204, and the other part is returned to the activated sludge tank 201 as surplus sludge through a pipe 206. Mixed with organic wastewater. This allows the separated water to be treated in a short time. still,
The activated sludge tank 201 may perform biological denitrification by a circulating nitrification-denitrification method, etc., where a partition wall is installed in the tank, or an anaerobic (denitrification) zone → an aerobic (nitrification) zone, if necessary. In addition, the treated water discharged from the settling tank 203 is dephosphorized.
); Even if high-order linkages of lust are applied, conventional wastewater treatment technology can be used.
以上の様にして、廃水とその廃水の連理系から生ずる汚
泥とを混合して処理する第２実施例においては、第１図
に示した第１実施例と同様に、安定化、減容化され臭気
もほとんどなく含水率の低い脱水汚泥が得られると共に
、多量の汚泥を系外に排出することなく高濃度の有機性
廃水の処理を効果的に行なうことが出来る。As described above, in the second embodiment in which wastewater and sludge generated from the interaction system of the wastewater are mixed and treated, stabilization and volume reduction are achieved in the same manner as in the first embodiment shown in FIG. In addition, dehydrated sludge with almost no odor and low water content can be obtained, and highly concentrated organic wastewater can be effectively treated without discharging a large amount of sludge to the outside of the system.
次に第３図は、本発明を低濃度の有機性廃水の処理に適
用した本発明の第３の発明に係る第３実施例を示してあ
り、廃水処理系からの余剰汚泥の発生量を著しく低減さ
せることができるものである。なお、この第３実施例に
あっても、第１図に示したものと同−構成部分には同一
符号を付して、その説明を省略する。Next, FIG. 3 shows a third embodiment of the third invention of the present invention in which the present invention is applied to the treatment of low-concentration organic wastewater, and the amount of surplus sludge generated from the wastewater treatment system is This can be significantly reduced. In this third embodiment as well, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and their explanations will be omitted.
下水等のＢＯＤ５２００〜４００ ｍｒ：Ｊ、／′ｉ程
度の低濃度有殿性廃水は、曝気手段３０２をイアする活
性汚泥（！３０１に導入され常法により処理されたのら
、沈澱槽３０３で汚泥と忠埋水とに分離される。Low-concentration precipitated wastewater such as sewage with a BOD of 5200 to 400 mr: J, /'i is introduced into activated sludge (!301) which is irrigated through the aeration means 302, treated by a conventional method, and then treated in a settling tank 303. It is separated into sludge and Tadbu water.
次にこの汚泥を酵素有機質安定化工程１０に導入し、第
１実施例と同様に汚泥の乾物重量に対１）で所定量のキ
レート剤並びにｌＪ口水分解Ｍ索及び必要により適宜選
定されたその他の１）イ索か添加されＳ通気処理される
。Next, this sludge is introduced into the enzymatic organic substance stabilization step 10, and as in the first embodiment, a predetermined amount of chelating agent, lJ mouth water decomposition M rope, and others suitably selected as necessary are added to the dry weight of the sludge. 1) Addition of chlorine and S aeration treatment.
次にＭ素首改質安定化工程１０で処理された汚泥は、そ
のまま脱水することなく前記活性汚泥槽３０１に返送汚
泥として戻される３、これにより余剰汚泥の発生もＣま
とんどなく廃水を処理することか出来る。Next, the sludge treated in the M-head reforming stabilization step 10 is directly returned to the activated sludge tank 301 as return sludge without being dehydrated3, thereby eliminating the generation of surplus sludge and eliminating wastewater. can be processed.
なお、第３図の第３実施例における反応器１０１の汚泥
滞留時間は第１実施例の滞留時間より短り設定され、一
般には０．５〜５時間時間区するとよい。一方、キレー
ト剤や加水分解酵素の添加量は、第１実施例と同等又は
多少条目（こするとよい。また活性汚泥、Ｉｆ！１３０
１に導入される有機性廃水の温度が低く、余剰汚泥があ
まり発生しないものでおれば、第３図の鎖線で示した如
く酵素有機質安定化ＴＶ２１０をバイパスする配管３０
５を設は汚泥の一部をそのまま活性汚泥１ｉ３０１に返
送してもよい。The sludge retention time in the reactor 101 in the third embodiment shown in FIG. 3 is set to be shorter than the retention time in the first embodiment, and is generally set in a range of 0.5 to 5 hours. On the other hand, the amount of the chelating agent and hydrolytic enzyme added is the same as in the first example, or it is better to rub it slightly. Also, activated sludge, If!
If the temperature of the organic wastewater introduced into 1 is low and little surplus sludge is generated, the pipe 30 that bypasses the enzyme organic stabilization TV 210 as shown by the chain line in FIG.
5, a part of the sludge may be returned as is to the activated sludge 1i301.
また、この第３実施例におりる酵素首は質安定化工程１
０では、活訃汚泥槽３０１でリンを摂取した活性汚泥が
、キレート剤と加水分解酵素の作用で好気状態にもかか
わらずリンを放出する。この作用を利用して生物学的脱
リンを行なうこともできる。例えば、上記醪素右は質安
定化工程１０でリンを放出させ、活性汚泥（曹３０１で
リンを過剰摂取させた活四汚泥の一部を第３図の供給管
１０２から系外に出し別途小規模の装置で汚泥処理する
ことにより系内のリン物質収支を調整する。これにより
上記有機性廃水からのリンの除去が可能となる。また別
法としては、沈澱１３ｏ３からの活性汚泥の大部分をバ
イパス配管３０５に流入させ返送汚泥とし、残部の活性
汚泥をＭ素首は質安定化工程１０に流入させると共に、
後出管１０６またはポンプ１０８の排出側配管に加工浮
上装置等の固液分離手段を設け、濃縮された汚泥を活性
汚泥１ｉ３０１に返送し、リン濃度の高い分離液を凝集
沈澱等のリン除去を施し活性汚泥槽３０１に返送するか
または系外に出し別途連理する。In addition, the enzyme neck in this third example is used in the quality stabilization step 1.
0, the activated sludge that has taken up phosphorus in the activated carcass sludge tank 301 releases phosphorus despite the aerobic state due to the action of the chelating agent and hydrolytic enzyme. Biological dephosphorization can also be performed using this effect. For example, for the above-mentioned moromi, phosphorus is released in the quality stabilization step 10, and a part of the activated sludge (activated sludge in which phosphorus has been excessively ingested with Soda 301) is separately discharged from the system through the supply pipe 102 in Fig. 3. The balance of phosphorus in the system is adjusted by treating sludge with a small-scale device.This makes it possible to remove phosphorus from the organic wastewater.Also, another method is to treat activated sludge from sediment 13o3. A portion flows into the bypass pipe 305 as return sludge, and the remaining activated sludge flows into the quality stabilization step 10,
A solid-liquid separation means such as a processing flotation device is provided in the discharge pipe 106 or the discharge side pipe of the pump 108, the concentrated sludge is returned to the activated sludge 1i301, and the separated liquid with a high phosphorus concentration is subjected to phosphorus removal such as coagulation and sedimentation. The treated sludge is returned to the activated sludge tank 301 or taken out of the system and processed separately.
かように第３図のフローを基本として種々のリン除去を
入れた方法があるが、リン除去を行なう場合の活性汚泥
槽３０１は、長期間好気性にすると摂取したリンの再溶
出があるので適宜その条件に合せる必要がおり、例えば
活性汚泥１ｆＪ３０１で前述した循環式硝化脱窒法を行
なうような場合、硝化区域に微生物固定床を設けて硝化
時間を早めリン摂取の条件と合せる工夫をするとよい。There are various methods for removing phosphorus based on the flow shown in Figure 3, but if the activated sludge tank 301 is kept aerobic for a long period of time, the ingested phosphorus will be re-eluted. It is necessary to suit the conditions accordingly. For example, when performing the above-mentioned circulating nitrification-denitrification method with activated sludge 1fJ301, it is recommended to install a fixed bed of microorganisms in the nitrification area to speed up the nitrification time and match it with the phosphorus intake conditions. .
次に前記実施例の効果を確Ｒ２するために行なった実験
例を説明する。Next, an example of an experiment conducted to confirm the effect of the above embodiment will be described.
割」辻ユ
初沈汚泥と余剰汚泥を約４：６の割合で混合した下水汚
泥について第１図のフローに従って処理を行なった。こ
の下水汚泥の全固形物）開度は４．５ｗｔ％であった。Sewage sludge made by mixing first-settled sludge and surplus sludge in a ratio of approximately 4:6 was treated according to the flow shown in Figure 1. The total solid content of this sewage sludge was 4.5 wt%.
まず、下水汚泥１０ｍ３４こキレート剤としてニトリロ
三酢醒トリアンモニウム３０ｇ （汚泥乾物重量に対し
て０．００６７ ％ ）を清水に溶解したものを添加し
、しばらく混合した。これを反応器に５分毎の間欠で供
給し、清水に溶解さけ冷暗所に保存しておいたβ−グル
カナーゼ、アミラーゼ、プロテアーゼおよびリパーゼの
混合酵素を供給される下水汚泥１ ｍ３当り酵素５５ｇ
（汚泥乾物重量に対して０．１２％）になるように反
応器へ連続的に添加しＩこ。First, to 10 m of sewage sludge, 30 g (0.0067% based on the dry weight of sludge) of nitrilotriacetic acid triammonium dissolved in clean water was added as a chelating agent and mixed for a while. This was fed into the reactor intermittently every 5 minutes, and a mixed enzyme of β-glucanase, amylase, protease, and lipase was dissolved in fresh water and stored in a cool, dark place. 55 g of enzyme per 1 m3 of sewage sludge was supplied.
(0.12% based on the dry weight of sludge) was continuously added to the reactor.
反応器内混合物に対しては、ポンプ及びエジェクターに
より充分な循Ｉ；および通気を行なわせ、反応器内に設
けた電気ヒーターで加熱しながら、反応温度を４０℃１
反応時間（滞留時間）を８時間とし処理を行なった。反
応器から流出した処理汚泥をシックナーに移し汚泥と分
離水に分離（）、濃縮された汚泥をデカンタ−にて脱水
した。シックナー及びデカンタ−の分離水は廃水処理設
備に戻し、活性汚泥処理した。The mixture in the reactor is sufficiently circulated and vented using a pump and ejector, and the reaction temperature is raised to 40°C while being heated by an electric heater installed in the reactor.
The treatment was carried out with a reaction time (residence time) of 8 hours. The treated sludge flowing out of the reactor was transferred to a thickener and separated into sludge and separated water (), and the concentrated sludge was dehydrated in a decanter. The separated water from the thickener and decanter was returned to the wastewater treatment facility and treated as activated sludge.
上記反応器から流出した処理汚泥は、上記下水汚泥に比
べ粘性がなく、また臭気もほとんど感じられなかった。The treated sludge discharged from the reactor had less viscosity than the sewage sludge, and had almost no odor.
第２表にその思理結宋を示す。Table 2 shows the logical conclusion of the Song Dynasty.
第２表実験例１における処理結果
傘１）印は工揚排水試験方ｐＨｆＪｌｓ ＫＯ１０２−
１９８５）による。Table 2 Treatment results in Experimental Example 1 Umbrella 1) The mark indicates the industrial pumping wastewater test method pHfJls KO102-
(1985).
−２）印は下水試験方法（１９８４年版）による。-2) Marks are based on sewage testing methods (1984 edition).
１１３）印は衛生試験法・ｄ−解（１９８０．追補１９
８３）による。113) The mark is Sanitary Testing Method d-Solution (1980. Supplement 19)
83).
＊４）印は分析化学便覧（改訂三版！９１Ｎ発行）によ
る。*4) Marks are based on the Analytical Chemistry Handbook (revised 3rd edition! Published 91N).
上記実験結果では、反応器より流出した処理汚泥は、最
初の下水汚泥に比べ有機物質（強熱減量）を約３０％減
少しており、シリンダーによる２時間沈降汚泥容積にお
いても約４５％減少しており、安定した良好な沈降性を
有したものであった。The above experimental results show that the treated sludge that flows out of the reactor has about 30% less organic matter (ignition loss) compared to the original sewage sludge, and the sludge volume that settled in the cylinder for 2 hours has also been reduced by about 45%. It had stable and good sedimentation properties.
処理汚泥のデカンタ−による脱水汚泥（脱水ケーキ）の
含水率は、ポリアクリルアミド系のポリマーの添加層が
汚泥乾物臣聞当り０．３〜０．５％で５５〜６５ｗｔ％
と良好な結果が得られた。この脱水汚泥は、窒素、リン
、カリウムを多量に含有し、肥料等に利用することが出
来るものであった。The water content of the dehydrated sludge (dehydrated cake) obtained by decanting the treated sludge is 55 to 65 wt%, with the added layer of polyacrylamide polymer being 0.3 to 0.5% per dry weight of the sludge.
Good results were obtained. This dehydrated sludge contained large amounts of nitrogen, phosphorus, and potassium, and could be used as fertilizer.
実験例２
屠殺場から排出されたＢＯＤ５５２度（ＪＩＳＫＯ１０
２２１に従って測定）約７，０００ ｍｇ／ｊＱ、全固
形物濃度１．５ｗｔ％を有し多辺のタンパク質ａ３よび
脂肪分を含む廃水を第２図に示すフローに従って処理し
た。まず、上記廃水と後段に設けた水処理設備（活性汚
泥装置〉からの余剰汚泥との混合物（全固形物濃度１．
６５ ｗｔ％）に清水に溶解させたニトリロ三酢酸トリ
アンモニウムを上記混合物１ｍ３当り１５ｇ （混合物
の乾物重量に対して０．０９１％）になるように添加混
合した。これを反応器に２０分毎の間欠で供給し、清水
に溶解させたβ−グルカナーゼ、プロテアーゼおよびリ
パーゼを供給される上記混合物１ｍ３当り各々の酵素が
１５ｇ （酵素合計で４５０゜廃水と余剰汚泥の混合物
の乾物重量に対して０．２７％）となるように反応器に
定量的に添加した。Experimental Example 2 BOD discharged from slaughterhouse 552 degrees (JISKO10
221), a total solids concentration of 1.5 wt%, and containing multi-sided protein A3 and fat content, was treated according to the flow shown in FIG. First, a mixture (total solids concentration of 1.
Triammonium nitrilotriacetate dissolved in fresh water (65 wt%) was added and mixed in an amount of 15 g per m3 of the above mixture (0.091% based on the dry weight of the mixture). This was supplied to the reactor intermittently every 20 minutes, and β-glucanase, protease, and lipase dissolved in fresh water were supplied, and 15 g of each enzyme was supplied per 1 m3 of the above mixture (total enzyme concentration of 450°). 0.27% based on the dry weight of the mixture) was added quantitatively to the reactor.
反応器内混合物に対しては、ポンプ及びエジェクターに
より充分な循環および通気を行なわせ、反応器内に設け
た電気ヒーターで加熱しながら、反応温度を３３℃１反
応時間を５時間とし処理を行った。反応器より流出した
混合処理物を実験例１と同様に脱水処理した。分離水は
後段に設（プた水処理設備にて活性汚泥処理した。The mixture in the reactor was sufficiently circulated and aerated using a pump and ejector, and heated with an electric heater installed in the reactor, and the reaction temperature was set at 33°C for 5 hours for each reaction time. Ta. The mixed product discharged from the reactor was dehydrated in the same manner as in Experimental Example 1. Separated water was treated with activated sludge in a downstream water treatment facility.
上記実験では、後段の水処理設備の１ａ容■を従来の１
／２〜１／４程度にしてもＢＯＤ処理効率を損うことな
く処理出来た。なお後段の水処理設備から生ずる余剰汚
泥量（廃水と混合される）は従来の１／２程度でおった
。In the above experiment, the 1a volume of the downstream water treatment equipment was compared to the conventional 1a volume.
It was possible to process the BOD without impairing the BOD processing efficiency even when the amount was set to about 1/2 to 1/4. The amount of excess sludge (mixed with wastewater) generated from the water treatment equipment in the latter stage was about 1/2 that of the conventional method.
〈発明の効果〉
以上説明したところかられかるように本発明においては
、有機物質を含有する汚泥及び／又は廃水にキレート剤
と加水分解酵素を添加し、さらに酸素含有ガスを通気し
て処理することによって、次のような効果が得られる。<Effects of the Invention> As can be seen from the above explanation, in the present invention, a chelating agent and a hydrolytic enzyme are added to sludge and/or wastewater containing organic substances, and further oxygen-containing gas is aerated to treat the sludge and/or wastewater. By doing so, the following effects can be obtained.
（１）汚泥や廃水中の有は物質の減容化、安定化及び汚
泥の脱水性の向上をわずかな酵素で非常に短時間でなす
ことができる。(1) Volume reduction and stabilization of substances in sludge and wastewater and improvement of sludge dewatering properties can be achieved in a very short time with a small amount of enzymes.
（２）酵素とキレート剤と通気とによる相乗作用により
有機物質を短時間に処理することができ、さらに外部エ
ネルギーの供給を少なく又は不要にして酵素反応に最適
な温度を維持させることができ低シス］へで処理が出来
る。(2) The synergistic effect of enzymes, chelating agents, and aeration allows organic substances to be processed in a short time, and the optimum temperature for enzymatic reactions can be maintained with less or no need for external energy supply. Processing can be done by going to [System].
（３）多量に余剰汚泥を処理系外に排出することなく廃
水処理を効果的に出来る。(3) Effective wastewater treatment is possible without discharging large amounts of excess sludge outside the treatment system.
（４）汚泥や廃水の臭気を減少させることが出来る。(4) Odors of sludge and wastewater can be reduced.
第１図は本発明を有職性汚泥の処理に適用した実施例を
示す説明図、第２図は本発明を高濃度の有職性廃水の処
理に適用した別の実施例を示す説明図、および第３図は
本発明を低濃度の有機性廃水の処理に適用したさらに別
の実施例を示す説明図である。
１０・・・酵素有機質安定化工程、１１・・・脱水処理
工程、１２・・・分離水連理工程、２１・・・活性汚泥
装置、１０１・・・反応器、１０２・・・被処理物供給
管、１０３・・・酵素供給管、１０４・・・キレート剤
供給管、２０１、３０１・・・活性汚泥槽、２０３．３
０３・・・沈澱槽。FIG. 1 is an explanatory diagram showing an embodiment in which the present invention is applied to the treatment of occupational sludge, FIG. 2 is an explanatory diagram showing another embodiment in which the present invention is applied to the treatment of high-concentration occupational wastewater, and FIG. 3 is an explanatory diagram showing yet another embodiment in which the present invention is applied to the treatment of low-concentration organic wastewater. DESCRIPTION OF SYMBOLS 10... Enzyme organic substance stabilization process, 11... Dehydration treatment process, 12... Separated water interaction process, 21... Activated sludge apparatus, 101... Reactor, 102... Processing material supply Pipe, 103... Enzyme supply pipe, 104... Chelating agent supply pipe, 201, 301... Activated sludge tank, 203.3
03... Sedimentation tank.
Claims (1)
水分解酵素を添加し、酸素含有ガスを通気して処理する
ことを特徴とする汚泥、廃水等の処理方法。 ２、上記キレート剤の添加重量が、汚泥又は廃水の乾物
重量に対して０．００１〜０．５％であり、上記加水分
解酵素の添加重量が、上記乾物重量に対して０．０１〜
１％であることを特徴とする特許請求の範囲第１項記載
の汚泥、廃水等の処理方法。 ３、上記キレート剤は、エチレンジアミン四酢酸及びニ
トリロ三酢酸のナトリウム塩又はアンモニウム塩から選
択された単一キレート剤又は混合キレート剤であること
を特徴とする特許請求の範囲第１項又は第２項記載の汚
泥廃水等の処理方法。 ４、上記加水分解酵素は、β−グルカナーゼ、アミラー
ゼ、プロテアーゼ、リパーゼ又はセルラーゼから選択さ
れた単一酵素又は混合酵素であることを特徴とする特許
請求の範囲第１項又は第２項記載の汚泥、廃水等の処理
方法。 ５、上記処理は１０〜６０℃の温度、ｐＨ５〜８および
０．５〜１５時間の滞留時間で行なわれることを特徴と
する特許請求の範囲第１項記載の汚泥、廃水等の処理方
法。 ６、有機物質を含有する廃水に、後段の生物学的処理施
設からの汚泥とキレート剤と加水分解酵素とを加え、酸
素含有ガスを通気して処理した後、脱水処理を施し、そ
の分離水を上記生物学的処理施設で処理することを特徴
とする汚泥、廃水等の処理方法。 ７、上記キレート剤の添加重量が、上記廃水と上記汚泥
との混合物の乾物重量に対して ０．００１〜０．５％であり、上記加水分解酵素の添加
重量が、上記乾物重量に対して０．０１〜１％であるこ
とを特徴とする特許請求の範囲第６項記載の汚泥、廃水
等の処理方法。 ８、上記キレート剤は、エチレンジアミン四酢酸及びニ
トリロ三酢酸のナトリウム塩又はアンモニウム塩から選
択された単一キレート剤又は混合キレート剤であること
を特徴とする特許請求の範囲第６項又は第７項記載の汚
泥、廃水等の処理方法。 ９、上記加水分解酵素は、β−グルカナーゼ、アミラー
ゼ、プロテアーゼ、リパーゼ又はセルラーゼから選択さ
れた単一酵素又は混合酵素であることを特徴とする特許
請求の範囲第６項又は第７項記載の汚泥、廃水等の処理
方法。 １０、上記通気処理は、１０〜６０℃の温度、ｐＨ５〜
８および０．５〜１５時間の滞留時間で行なわれること
を特徴とする特許請求の範囲第６項記載の汚泥、廃水等
の処理方法。 １１、有機物質を含有する廃水を生物学的処理施設で処
理すると共に、該生物学的処理施設から排出される汚泥
にキレート剤と加水分解酵素とを加え、酸素含有ガスを
通気して処理した後、その処理汚泥を上記生物学的処理
施設に返送することを特徴とする汚泥、廃水等の処理方
法。 １２、上記キレート剤の添加重量が、汚泥の乾物重量に
対して０．００１〜０．５％であり、上記加水分解酵素
の添加重量が、上記乾物重量に対して０．０１〜１％で
あることを特徴とする特許請求の範囲第１１項記載の汚
泥、廃水等の処理方法。 １３、上記キレート剤は、エチレンジアミン四酢酸及び
ニトリロ三酢酸のナトリウム塩又はアンモニウム塩から
選択された単一キレート剤又は混合キレート剤であるこ
とを特徴とする特許請求の範囲第１１項又は第１２項記
載の汚泥、廃水等の処理方法。 １４、上記加水分解酵素は、β−グルカナーゼ、アミラ
ーゼ、プロテアーゼ、リパーゼ又はセルラーゼから選択
された単一酵素又は混合酵素であることを特徴とする特
許請求の範囲第１１項又は第１２項記載の汚泥、廃水等
の処理方法。 １５、上記通気処理は、１０〜６０℃の温度、ｐＨ５〜
８および０．５〜１５時間の滞留時間で行なわれること
を特徴とする特許請求の範囲第１１項記載の汚泥、廃水
等の処理方法。[Claims] 1. A method for treating sludge, wastewater, etc., which comprises adding a chelating agent and a hydrolyzing enzyme to sludge or wastewater containing organic substances, and treating the sludge or wastewater by aerating oxygen-containing gas. 2. The added weight of the chelating agent is 0.001 to 0.5% based on the dry weight of sludge or wastewater, and the added weight of the hydrolytic enzyme is 0.01 to 0.5% based on the dry weight of the sludge or wastewater.
1%. The method for treating sludge, wastewater, etc. according to claim 1. 3. Claim 1 or 2, wherein the chelating agent is a single chelating agent or a mixed chelating agent selected from sodium salts or ammonium salts of ethylenediaminetetraacetic acid and nitrilotriacetic acid. Treatment method for sludge wastewater, etc. as described. 4. The sludge according to claim 1 or 2, wherein the hydrolase is a single enzyme or a mixed enzyme selected from β-glucanase, amylase, protease, lipase, or cellulase. , treatment methods for wastewater, etc. 5. The method for treating sludge, wastewater, etc. according to claim 1, wherein the treatment is carried out at a temperature of 10 to 60°C, a pH of 5 to 8, and a residence time of 0.5 to 15 hours. 6. Add sludge, chelating agent, and hydrolytic enzyme from the subsequent biological treatment facility to wastewater containing organic substances, treat it by aerating oxygen-containing gas, and then perform dehydration treatment to obtain the separated water. A method for treating sludge, wastewater, etc., characterized in that it is treated in the biological treatment facility described above. 7. The weight of the chelating agent added is 0.001 to 0.5% with respect to the dry weight of the mixture of the wastewater and the sludge, and the weight of the hydrolytic enzyme added is 0.001 to 0.5% with respect to the dry weight of the mixture of the wastewater and the sludge. The method for treating sludge, wastewater, etc. according to claim 6, characterized in that the content is 0.01 to 1%. 8. Claim 6 or 7, wherein the chelating agent is a single chelating agent or a mixed chelating agent selected from sodium salts or ammonium salts of ethylenediaminetetraacetic acid and nitrilotriacetic acid. Treatment methods for sludge, wastewater, etc. described. 9. The sludge according to claim 6 or 7, wherein the hydrolase is a single enzyme or a mixed enzyme selected from β-glucanase, amylase, protease, lipase, or cellulase. , treatment methods for wastewater, etc. 10. The above aeration treatment is carried out at a temperature of 10 to 60°C and a pH of 5 to 60°C.
7. The method for treating sludge, wastewater, etc. according to claim 6, characterized in that the treatment is carried out at a residence time of 0.5 to 15 hours. 11. Wastewater containing organic substances was treated in a biological treatment facility, and chelating agent and hydrolytic enzyme were added to the sludge discharged from the biological treatment facility, and oxygen-containing gas was aerated. A method for treating sludge, wastewater, etc., characterized in that the treated sludge is then returned to the biological treatment facility. 12. The added weight of the chelating agent is 0.001 to 0.5% with respect to the dry weight of the sludge, and the added weight of the hydrolytic enzyme is 0.01 to 1% with respect to the dry weight of the sludge. 12. A method for treating sludge, wastewater, etc. according to claim 11. 13. Claim 11 or 12, wherein the chelating agent is a single chelating agent or a mixed chelating agent selected from sodium salts or ammonium salts of ethylenediaminetetraacetic acid and nitrilotriacetic acid. Treatment methods for sludge, wastewater, etc. described. 14. The sludge according to claim 11 or 12, wherein the hydrolase is a single enzyme or a mixed enzyme selected from β-glucanase, amylase, protease, lipase, or cellulase. , treatment methods for wastewater, etc. 15. The above aeration treatment is carried out at a temperature of 10 to 60°C and a pH of 5 to
12. The method for treating sludge, wastewater, etc. according to claim 11, characterized in that the treatment is carried out at a residence time of 8 and 0.5 to 15 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61262169A JPS63116800A (en) | 1986-11-04 | 1986-11-04 | Treatment of sludge and waste water or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61262169A JPS63116800A (en) | 1986-11-04 | 1986-11-04 | Treatment of sludge and waste water or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63116800A true JPS63116800A (en) | 1988-05-21 |
Family
ID=17372019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61262169A Pending JPS63116800A (en) | 1986-11-04 | 1986-11-04 | Treatment of sludge and waste water or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63116800A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5019267A (en) * | 1988-09-14 | 1991-05-28 | Prowatec Gmbh Halle | Process for mesophilic or thermophilic aerobico-enzymic conditioning of liquid organic substances and biomass |
| FR2684094A1 (en) * | 1991-11-22 | 1993-05-28 | Regie Autonome Transports | Process for the treatment of aqueous effluents by bioassisted tangential ultrafiltration |
| JP2002248488A (en) * | 2001-02-23 | 2002-09-03 | Japan Sewage Works Agency | Aeration method and aeration apparatus |
| JP2003047995A (en) * | 2001-08-07 | 2003-02-18 | Mitsubishi Kakoki Kaisha Ltd | Sludge treatment apparatus and sludge treatment method |
| JP2003326299A (en) * | 2002-05-09 | 2003-11-18 | Mitsubishi Kakoki Kaisha Ltd | Sludge treatment apparatus and sludge treatment method |
| JP2008207065A (en) * | 2007-02-23 | 2008-09-11 | Petroleum Energy Center | Treatment method of organic wastewater |
| JP2009072763A (en) * | 2007-08-28 | 2009-04-09 | Diamond Engineering Kk | Maintenance method of bioreactor |
| JP2009072762A (en) * | 2007-08-28 | 2009-04-09 | Diamond Engineering Kk | Activated sludge material, and reduction method of excess sludge amount in bioreactor |
| US8603339B2 (en) | 2007-08-28 | 2013-12-10 | Diamond Engineering Co., Ltd. | Activated sludge material, method for reducing excess sludge production in bioreactor, and method of controlling bioreactor |
| JP2019501018A (en) * | 2015-12-23 | 2019-01-17 | ノボザイムス アクティーゼルスカブ | Enhancing sludge dewaterability by enzymatic treatment |
| US11623885B2 (en) | 2015-12-23 | 2023-04-11 | Novozymes A/S | Methods for enhancing the dewaterability of sludge with enzyme treatment |
-
1986
- 1986-11-04 JP JP61262169A patent/JPS63116800A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5019267A (en) * | 1988-09-14 | 1991-05-28 | Prowatec Gmbh Halle | Process for mesophilic or thermophilic aerobico-enzymic conditioning of liquid organic substances and biomass |
| FR2684094A1 (en) * | 1991-11-22 | 1993-05-28 | Regie Autonome Transports | Process for the treatment of aqueous effluents by bioassisted tangential ultrafiltration |
| JP2002248488A (en) * | 2001-02-23 | 2002-09-03 | Japan Sewage Works Agency | Aeration method and aeration apparatus |
| JP2003047995A (en) * | 2001-08-07 | 2003-02-18 | Mitsubishi Kakoki Kaisha Ltd | Sludge treatment apparatus and sludge treatment method |
| JP2003326299A (en) * | 2002-05-09 | 2003-11-18 | Mitsubishi Kakoki Kaisha Ltd | Sludge treatment apparatus and sludge treatment method |
| JP2008207065A (en) * | 2007-02-23 | 2008-09-11 | Petroleum Energy Center | Treatment method of organic wastewater |
| JP2009072763A (en) * | 2007-08-28 | 2009-04-09 | Diamond Engineering Kk | Maintenance method of bioreactor |
| JP2009072762A (en) * | 2007-08-28 | 2009-04-09 | Diamond Engineering Kk | Activated sludge material, and reduction method of excess sludge amount in bioreactor |
| US8603339B2 (en) | 2007-08-28 | 2013-12-10 | Diamond Engineering Co., Ltd. | Activated sludge material, method for reducing excess sludge production in bioreactor, and method of controlling bioreactor |
| JP2019501018A (en) * | 2015-12-23 | 2019-01-17 | ノボザイムス アクティーゼルスカブ | Enhancing sludge dewaterability by enzymatic treatment |
| JP2021121433A (en) * | 2015-12-23 | 2021-08-26 | ノボザイムス アクティーゼルスカブ | Method of enhancing dewaterability of sludge by enzyme treatment |
| US11623885B2 (en) | 2015-12-23 | 2023-04-11 | Novozymes A/S | Methods for enhancing the dewaterability of sludge with enzyme treatment |
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