JPS6385080A - Method of composting water filtration sludge - Google Patents
Method of composting water filtration sludgeInfo
- Publication number
- JPS6385080A JPS6385080A JP61225851A JP22585186A JPS6385080A JP S6385080 A JPS6385080 A JP S6385080A JP 61225851 A JP61225851 A JP 61225851A JP 22585186 A JP22585186 A JP 22585186A JP S6385080 A JPS6385080 A JP S6385080A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- fermentation
- purified water
- aid
- dehydration
- 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.)
- Granted
Links
- 239000010802 sludge Substances 0.000 title claims description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 34
- 238000000034 method Methods 0.000 title claims description 17
- 238000009264 composting Methods 0.000 title claims description 10
- 238000001914 filtration Methods 0.000 title 1
- 238000000855 fermentation Methods 0.000 claims description 34
- 230000004151 fermentation Effects 0.000 claims description 34
- 239000008213 purified water Substances 0.000 claims description 23
- 230000018044 dehydration Effects 0.000 claims description 18
- 238000006297 dehydration reaction Methods 0.000 claims description 18
- 229920005615 natural polymer Polymers 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 4
- 238000010564 aerobic fermentation Methods 0.000 claims description 3
- 229920001661 Chitosan Polymers 0.000 description 10
- 239000005416 organic matter Substances 0.000 description 10
- 239000002361 compost Substances 0.000 description 9
- 210000003608 fece Anatomy 0.000 description 8
- 241000287828 Gallus gallus Species 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000010871 livestock manure Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229920001059 synthetic polymer Polymers 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 239000003337 fertilizer Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000206761 Bacillariophyta Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920002101 Chitin Polymers 0.000 description 1
- 241000192700 Cyanobacteria Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910003480 inorganic solid Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Fertilizers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、浄水場の濃縮汚泥から一次発酵品を連続的に
堆肥化する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for continuously composting a primary fermentation product from concentrated sludge of a water purification plant.
浄水場の濃縮脱水汚泥は従来大部分が埋立用土等に供さ
れ、一部は土壌改良材として利用されてはいるが、堆肥
化までの加工をしている例は見当らない。Conventionally, most of the concentrated dehydrated sludge from water treatment plants has been used as landfill soil, and some of it has been used as a soil improvement material, but there are no examples of it being processed to the point of composting.
一般に浄水場の脱水汚泥は大部分が無機物であり、有機
物の含有量が３０重量％以下と低いので発酵し難い上、
含有する有機物がアオコ、珪藻類などの藻類を主として
いるのでこれを分解し堆肥化するのは困難であると言わ
れている。In general, dehydrated sludge from water treatment plants is mostly inorganic, with a low organic content of less than 30% by weight, which makes it difficult to ferment.
It is said that it is difficult to decompose and compost the organic matter contained mainly in algae such as blue-green algae and diatoms.
しかし浄水場の脱水汚泥を堆肥化することができれば廃
食源の有効利用の面で好ましいことである。However, if dehydrated sludge from water treatment plants could be composted, it would be preferable in terms of effective use of waste food sources.
有機性物質を発酵させて乾燥肥料化する方法として、発
酵物を種として発酵原料に移植してバッチ式に発酵させ
る方法（特開昭５４−１３８１８３）、都市塵芥等の廃
棄物からの被処理堆肥物の１０〜２０％を発酵槽に残し
てバッチで操作する方法（＃開開５４−１３５１５６）
などが知られているが、バッチ式の方法では能率が悪く
、安価な製造ができない、また炭素／窒素の重量比Ｃ／
Ｎが１０未満または２０を越える有機物に易発酵性有機
物を添加して発酵させる方法（特開昭５８−１２０５９
５）が知られているが、この技術は浄化槽の余剰汚泥、
脱水汚泥、もみがら、樹皮、稲わら等の発酵に適用され
、浄水汚泥には適用できない。As a method of fermenting organic substances and turning them into dry fertilizer, there is a method of batch fermentation by transplanting the fermented material as seeds to fermentation raw materials (Japanese Patent Application Laid-open No. 54-138183), and a method of converting waste such as urban garbage into processed materials. A method of batch operation with 10-20% of the compost remaining in the fermenter (#Kaikai54-135156)
However, batch-type methods are inefficient and cannot be produced at low cost, and the carbon/nitrogen weight ratio C/
Method of fermenting by adding easily fermentable organic matter to organic matter with N less than 10 or more than 20 (Japanese Patent Application Laid-Open No. 58-12059
5) is known, but this technology is used to remove excess sludge from septic tanks,
Applicable to fermentation of dehydrated sludge, rice husks, bark, rice straw, etc., and cannot be applied to purified water sludge.
また、浄水汚泥は水分が多いので脱水した上で堆肥化す
る必要があるが、し尿処理場または下水処理場から発生
する多量の有機物を含む汚泥を脱水する場合に、高分子
凝集剤をカチオン性とアニオン性の二液を用いて汚泥を
脱水し、脱水後他の有機物を添加せずに堆肥化する方法
（特開昭５７−１３５７９０）が開示されている。浄水
汚泥は易発酵有機物が少ないのでこの方法を適用して堆
肥化することはできない。In addition, since purified water sludge has a high water content, it needs to be dehydrated before being composted. However, when dewatering sludge containing large amounts of organic matter generated from human waste treatment plants or sewage treatment plants, it is necessary to use a cationic polymer flocculant. A method (Japanese Unexamined Patent Publication No. 57-135790) has been disclosed in which sludge is dehydrated using two anionic liquids and composted without adding other organic substances after dehydration. Purified water sludge cannot be composted using this method because it has little organic matter that is easily fermentable.
本発明は、浄水汚泥を対象として、これを連続的に能率
よく堆肥化する方法を提供しようとするもので次の問題
を克服しなければならない。The present invention aims to provide a method for continuously and efficiently composting purified water sludge, and the following problems must be overcome.
１）浄水汚泥を脱水助剤を用いてさらに脱水する必要が
あり、この脱水助剤は脱水濾液および堆肥中に残存して
も無害でなければならない。1) It is necessary to further dewater the purified water sludge using a dewatering aid, and this dewatering aid must be harmless even if it remains in the dewatering filtrate and compost.
２）浄水汚泥は発酵しにくいので発酵を促進させる必要
がある。発酵中の一部の汚泥の上に新しい汚泥を載せる
ことによってこの問題の解決を図る。2) Since purified water sludge is difficult to ferment, it is necessary to promote fermentation. This problem is solved by placing fresh sludge on top of some of the sludge that is being fermented.
３）有機物含有量が少ないので助剤を加え高温を得て発
酵させ、かつ殺菌する。3) Since the organic matter content is low, auxiliary agents are added to obtain high temperature for fermentation and sterilization.
本発明は浄水汚泥に天然系高分子脱水助剤を加えて反応
槽で攪拌した後脱水し、該脱水汚泥に発酵助剤を添加し
て混和し、該混和物を連続発酵槽中の一部の既発酵汚泥
上に供給し順次移送しつつ好気発酵させることを特徴と
する浄水汚泥の堆肥化方法である。In the present invention, a natural polymer dehydration aid is added to purified water sludge, the mixture is stirred in a reaction tank and then dehydrated, a fermentation aid is added and mixed with the dehydrated sludge, and a portion of the mixture is transferred to a continuous fermentation tank. This is a method for composting purified water sludge, which is characterized by supplying the sludge onto fermented sludge and carrying out aerobic fermentation while sequentially transferring the sludge.
本発明のフローシートを第１図に示した。 A flow sheet of the present invention is shown in FIG.
貯槽１に貯蔵されている浄水汚泥をポンプ２により反応
槽５に送り、溶解槽３で水に溶解した天然系高分子脱水
助剤をポンプ４で反応槽５に送り、ここでこれらを十分
混合反応させ、その反応物を脱水機７に送って脱水する
。脱水機７から出た脱水汚泥９を混和機８に送り、発酵
助剤１０を加え、また発酵ずみ製品１７の一部を加えて
混和する。この混和物をベルトコンベア１２により発酵
槽１３に送る０発酵槽１３には攪拌と移送のための攪拌
羽根を備え、モータ１４により適時駆動する。一方発酵
槽には空気管１５を介して空気を吹き込み好気発酵させ
、排気は排気管１６から排出する。発酵槽内を移送され
た汚泥は発酵し、約７日で発酵槽から製品１７として排
出される。The purified water sludge stored in the storage tank 1 is sent to the reaction tank 5 by the pump 2, and the natural polymer dehydration aid dissolved in water in the dissolution tank 3 is sent to the reaction tank 5 by the pump 4, where they are thoroughly mixed. The reaction product is sent to a dehydrator 7 for dehydration. The dehydrated sludge 9 discharged from the dehydrator 7 is sent to the mixer 8, where a fermentation aid 10 is added and a portion of the fermented product 17 is added and mixed. The fermenter 13 which sends this mixture to the fermenter 13 by a belt conveyor 12 is equipped with stirring blades for stirring and transfer, and is driven by a motor 14 at appropriate times. On the other hand, air is blown into the fermentation tank through an air pipe 15 to effect aerobic fermentation, and exhaust gas is discharged through an exhaust pipe 16. The sludge transferred through the fermenter is fermented and discharged from the fermenter as a product 17 in about 7 days.
本発明はまず浄水場の濃縮汚泥に、天然高分子凝集剤（
キトサン）を用いて脱水する。すなわち凝集剤として、
キトサン（０，２％液）の適当量を注入して凝集させ脱
水する。この場合、脱水機の種類は問わない。The present invention first uses a natural polymer flocculant (
dehydrate using chitosan). In other words, as a flocculant,
An appropriate amount of chitosan (0.2% liquid) is injected to cause coagulation and dehydration. In this case, the type of dehydrator does not matter.
前述の特開昭５７−１３５７９０のように二液を用いて
脱水効率を上げる方法もあるが、本発明では、堆肥化の
前に、含水率の調整を行うので、含水率が高くても余り
問題はない、キトサンは無害であり、土中でも分解が早
く堆肥化に適している。There is a method of increasing dehydration efficiency using two liquids as in the above-mentioned Japanese Patent Application Laid-Open No. 57-135790, but in the present invention, the moisture content is adjusted before composting, so even if the moisture content is high, there is no excess water content. No problem, chitosan is harmless, decomposes quickly in soil, and is suitable for composting.
本発明に用いる天然系高分子脱水助剤であるキトサンは
キチンのＮ−説アセチル化物であって、カニの甲皮等か
ら抽出した天然の高分子である。Chitosan, which is a natural polymer dehydration aid used in the present invention, is an N-acetylated product of chitin, and is a natural polymer extracted from crab carapace and the like.
生産量の８０％は水処理やねり製品加工場で廃棄される
タンパク質回収の凝集剤（１，５００〜２．０００円／
ｋｇ）として使用されている。水処理で凝集剤として使
用する場合、合成高分子凝集剤と比較したとき、
（１）土壌中での分解性試験でｃｏ２の発生量では、合
成高分子はむしろ発生の抑制傾向があるが、キトサンは
著しくＧＯ２発生量が増大し、大きな分解率を示した。80% of the production volume is made up of flocculants for protein recovery (1,500 to 2,000 yen /
kg). When used as a flocculant in water treatment, when compared with synthetic polymer flocculants, (1) Synthetic polymers tend to suppress CO2 generation in soil degradability tests; Chitosan significantly increased the amount of GO2 generated and showed a large decomposition rate.
（２）活性汚泥にて比較したとき、合成高分子に対し１
０倍以上、可溶性澱粉に対しても２倍以上の速さで分解
された。(2) When compared with activated sludge, 1 for synthetic polymers
It was degraded more than 0 times faster than soluble starch, and more than twice as fast as soluble starch.
という結果が得られている。The result was obtained.
キトサンは製品用途として、土壌改良剤、有害微生物防
除、肥料、農薬等に用いられる。Chitosan is used as a soil conditioner, harmful microorganism control agent, fertilizer, pesticide, etc.
脱水汚泥の含水率に応じて、水分調整材として製品の還
流を行い、混和機で混和する。Depending on the moisture content of the dehydrated sludge, the product is refluxed as a moisture adjustment agent and mixed with a mixer.
浄水汚泥中の有機物含有量が少ないとき（一般に有機分
が４０％以上でないと発酵しにくい）発酵はしにくい。Fermentation is difficult when the organic matter content in purified water sludge is low (generally, fermentation is difficult unless the organic content is 40% or more).
浄水汚泥は一般に有機分の含有量が３０％以下と低いの
で、９３酵を容易に進行させるため他の有機分高含有の
材料として発酵助剤（鶏ふん等）を添加して、発酵させ
る。その結果、取り扱い易く、減菌されて浄水汚泥堆肥
を得る。Since purified water sludge generally has a low organic content of 30% or less, in order to facilitate the progress of 93 fermentation, fermentation aids (chicken manure, etc.) are added as other materials with high organic content and fermentation is carried out. As a result, purified water sludge compost is obtained which is easy to handle and sterilized.
発酵助剤として他の有機質材料を添加することは、肥効
成分も増し、土壌改良材として付加価値が上がる。Adding other organic materials as fermentation aids increases the fertilizing components and increases added value as a soil improvement material.
横軸固定型の発酵槽内で、発酵中の汚泥を第３図のよう
に移送し、その適当量（通常は１０〜３０％でよい）を
残しその上に新しい汚泥を投入することにより、発酵時
間を早める。In a fermenter with a fixed horizontal shaft, the sludge undergoing fermentation is transferred as shown in Figure 3, leaving an appropriate amount (usually 10 to 30%) and adding new sludge on top. Speed up fermentation time.
以上の方法で堆肥化を実施することにより、無害で、取
り扱い易い浄水堆肥を得ることができる。一般的に行わ
れている脱水後、乾燥、造粒等の操作は省略でき、発酵
させて堆肥化するので。By carrying out composting using the above method, purified water compost that is harmless and easy to handle can be obtained. The commonly performed operations such as dehydration, drying, and granulation can be omitted, and the material is fermented and composted.
畑土、水田に使用しても全く無害である。It is completely harmless even when used on field soil or paddy fields.
印旙沼浄水場の浄水汚泥を用いて第１図に示すフローに
より浄水汚泥の堆肥化を行った。実施例に用いた装置の
仕様は次の通りである。Using purified water sludge from the Insanuma water treatment plant, the purified water sludge was composted according to the flow shown in Figure 1. The specifications of the device used in the examples are as follows.
浄水汚泥貯槽：容量５ｍ’
脱水助剤溶解槽：容量０．２ ｍ’
反応槽：容量０．５ ｍ’
攪拌機０．１ｋｗスターラー
脱水ｆｉ：ミニ波布式フィルタプ
レス＠１，２００ｍｍ
濾布速度２．１〜８．５ ｍ ／ ｍ ｉ ｎ圧縮圧力
１〜２ｋｇ／ｃｒｒｒ’
混和機：パドルニーダ２．２ ｋ ｗ
発酵１ｆｊ ： ７００ ｍｍＷＸ ８００ ｍｍＷＸ
２，１００ｍｍＬ
空気吹込室４室構成
パドルホイール：ｆ、５ｋｗ
１〜１０ ｒ、ｐ、ｍ 間欠運転
汚泥の性状、脱水助剤、発酵助剤の性状は次の通りであ
る。Purified water sludge storage tank: Capacity 5 m' Dehydration aid dissolving tank: Capacity 0.2 m' Reaction tank: Capacity 0.5 m' Stirrer 0.1 kW Stirrer dehydration fi: Mini wave cloth type filter press @ 1,200 mm Filter cloth speed 2. 1-8.5 m/min Compression pressure 1-2 kg/crrr' Mixing machine: Paddle kneader 2.2 kW Fermentation 1fj: 700 mmWX 800 mmWX
2,100 mmL Paddle wheel with 4 air blowing chambers: f, 5 kW 1 to 10 r, p, m Intermittent operation The properties of the sludge, dehydration aid, and fermentation aid are as follows.
汚泥濃度二固形分２．８％
汚泥中の固形成分：無機固形分７４重着％有機物２６重
量％
脱水助剤：キトサン（０，２％溶液）
発酵助剤：乾燥部ふん
混合比１７重量％
（浄水汚泥中の固形分／鶏ふん＝５７１）まず浄水汚泥
の凝集脱水試験についてへりオス脱水機を用いて、合成
ポリマー（カチオン）との比較試験を実施した。Sludge concentration: solid content 2.8% Solid components in sludge: inorganic solid content 74% organic matter 26% by weight Dehydration aid: chitosan (0.2% solution) Fermentation aid: drying part feces mixing ratio 17% by weight (Solid content in purified water sludge/chicken droppings = 571) First, a comparison test with a synthetic polymer (cation) was conducted using a Helios dehydrator for a coagulation dehydration test of purified water sludge.
第１表に天然高分子キトサンと合成高分子との脱水比較
実験の結果を示す。注入量、汚泥の含水率とも全く差が
なくキトサンの効果が実証されている。Table 1 shows the results of a comparative dehydration experiment between the natural polymer chitosan and the synthetic polymer. There was no difference in the amount of injection or the water content of the sludge, demonstrating the effectiveness of chitosan.
またセキスイＲＦ型脱水機で、連続、凝集、脱水、コン
ポスト化実験を実施し、同様の効果を確認している。We also conducted continuous, agglomeration, dehydration, and composting experiments using the Sekisui RF dehydrator, and confirmed similar effects.
第３図は発酵助剤として、乾燥鶏ふんを混合して発酵槽
で連続発酵実験したときの例を示すもので、発酵槽の原
料投入側（第１室）の底部近傍側壁から測定した発酵槽
内の測定温度変化である。Figure 3 shows an example of a continuous fermentation experiment in a fermenter with dry chicken manure mixed as a fermentation aid. Measure the temperature change within.
第３図中に矢印で投入時期を示しているように毎日原料
投入し、１日に２〜３回槽内容物を前進移動させ、７〜
８日目に発酵槽から排出する。第３図の温度変化から明
らかなように最初の投入から１０で発酵を開始して６０
℃に達し、２日日以降は発酵が早く十分な温度が得られ
ている。Input the raw materials every day as indicated by the arrows in Figure 3, and move the contents of the tank forward two to three times a day.
Drain the fermenter on the 8th day. As is clear from the temperature change in Figure 3, fermentation started at 10 minutes after the first addition and started at 60 minutes.
℃, and after the 2nd day, fermentation started quickly and a sufficient temperature was obtained.
次に比較のために、第４図に浄水脱水汚泥（有機物２６
重量％）を単独で発酵実験した例を示した。発酵槽、投
入量、温度測定位置等は第３図の場合と同様である。汚
泥は、有機物含有量が少なく、その質も藻類が主である
ことから、高温（６０℃以上）の発酵は得られなかった
。しかし、中温までの発酵は２日目以降早くなっており
、前日の投入物が種堆肥として作用する効果は認められ
た。Next, for comparison, Figure 4 shows purified water dewatered sludge (organic matter 26
An example was shown in which a fermentation experiment was carried out using only 5% by weight). The fermenter, input amount, temperature measurement position, etc. are the same as in the case of FIG. 3. Since the sludge has a low organic matter content and is mainly composed of algae, fermentation at high temperatures (60° C. or higher) could not be achieved. However, fermentation to medium temperature became faster after the second day, and the effect of the input from the previous day acting as seed compost was recognized.
なお、有機成分が十分に含まれている浄水汚泥では発酵
助剤を加えないでも発酵させることができることは論を
俟たない。It goes without saying that purified water sludge containing sufficient organic components can be fermented without adding a fermentation aid.
次に鶏ふんの混合率を変化した場合に本発明方法によっ
て得られる製品の肥効成分について実測した結果を第２
表に示す。鶏ふん混合率が０％（汚泥のみ）の場合に対
して、肥料として有効な肥効３成分がほぼ鶏ふん混合率
に比例して増加しており、好適な堆肥を得ることができ
る。Next, the results of actual measurement of the fertilizing components of the product obtained by the method of the present invention when the mixing ratio of chicken manure was changed are shown in the second table.
Shown in the table. Compared to the case where the chicken manure mixing ratio is 0% (sludge only), the three components effective as fertilizer increase almost in proportion to the chicken manure mixing ratio, making it possible to obtain a suitable compost.
本発明は次の優れた効果を奏する。 The present invention has the following excellent effects.
（イ） 本発明方法により、従来堆肥化することが困難
であった浄水汚泥を安価容易に連続的に堆肥化し有効利
用することができるようになった。(a) By the method of the present invention, purified water sludge, which has conventionally been difficult to compost, can be continuously composted and effectively utilized at low cost and easily.
（ロ） 脱水時の助剤として用いる天然高分子脱水助剤
キトサンは、濾液および堆肥中に残存しても無害である
。(b) Chitosan, a natural polymer dehydration aid used as an aid during dehydration, is harmless even if it remains in the filtrate and compost.
（ハ） 発酵中の一部の汚泥の上に、新しい汚泥をのせ
ることで、発酵を早くすることができる。(c) Fermentation can be accelerated by placing new sludge on top of some of the sludge that is currently fermenting.
（ニ） 発酵助剤（鶏ふん等）を加えることで高温を得
て減菌すると共に肥効成分を増加させることができる。(d) By adding fermentation aids (chicken manure, etc.), it is possible to obtain high temperatures, sterilize bacteria, and increase fertilizing ingredients.
第１図は本発明の実施例のフローシート、第２図は発酵
槽内の発酵汚泥の移送状況を説明する説明図、第３図は
実施例の温度推移を示すグラフ。
第４図は比較例の温度推移を示すグラフである。
５・・・反応槽
７・・・脱水機
８・・・混和機
１３・・・発酵槽FIG. 1 is a flow sheet of an example of the present invention, FIG. 2 is an explanatory diagram illustrating the transfer status of fermented sludge in a fermenter, and FIG. 3 is a graph showing temperature changes in the example. FIG. 4 is a graph showing the temperature transition of the comparative example. 5... Reaction tank 7... Dehydrator 8... Mixer 13... Fermentation tank
Claims (1)
後脱水し、該脱水汚泥に発酵助剤を添加して混和し、該
混和物を既に発酵中の汚泥上に供給し、順次移送しつつ
好気発酵させることを特徴とする浄水汚泥の堆肥化方法
。1. A natural polymer dehydration aid is added to purified water sludge, stirred and then dehydrated, a fermentation aid is added to the dehydrated sludge and mixed, the mixture is supplied onto the sludge that is already undergoing fermentation, and transferred sequentially. A method for composting purified water sludge, which is characterized by aerobic fermentation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61225851A JPH0717470B2 (en) | 1986-09-26 | 1986-09-26 | Composting method of purified water sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61225851A JPH0717470B2 (en) | 1986-09-26 | 1986-09-26 | Composting method of purified water sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6385080A true JPS6385080A (en) | 1988-04-15 |
| JPH0717470B2 JPH0717470B2 (en) | 1995-03-01 |
Family
ID=16835834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61225851A Expired - Lifetime JPH0717470B2 (en) | 1986-09-26 | 1986-09-26 | Composting method of purified water sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0717470B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07223886A (en) * | 1994-02-08 | 1995-08-22 | Motomiyamachi | Compost aging promoter, compost and production of compost |
| JP2002017158A (en) * | 2000-06-30 | 2002-01-22 | Sumitomo Forestry Co Ltd | Material for plant-growing medium |
-
1986
- 1986-09-26 JP JP61225851A patent/JPH0717470B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07223886A (en) * | 1994-02-08 | 1995-08-22 | Motomiyamachi | Compost aging promoter, compost and production of compost |
| JP2002017158A (en) * | 2000-06-30 | 2002-01-22 | Sumitomo Forestry Co Ltd | Material for plant-growing medium |
| JP4532683B2 (en) * | 2000-06-30 | 2010-08-25 | 住友林業株式会社 | Plant growth medium materials |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0717470B2 (en) | 1995-03-01 |
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