JPS595037B2 - How to treat organic wastewater - Google Patents
How to treat organic wastewaterInfo
- Publication number
- JPS595037B2 JPS595037B2 JP52079080A JP7908077A JPS595037B2 JP S595037 B2 JPS595037 B2 JP S595037B2 JP 52079080 A JP52079080 A JP 52079080A JP 7908077 A JP7908077 A JP 7908077A JP S595037 B2 JPS595037 B2 JP S595037B2
- Authority
- JP
- Japan
- Prior art keywords
- aeration tank
- granular
- microorganisms
- organic wastewater
- activated sludge
- 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.)
- Expired
Links
- 239000002351 wastewater Substances 0.000 title claims description 6
- 238000005273 aeration Methods 0.000 claims description 29
- 239000007787 solid Substances 0.000 claims description 29
- 239000010802 sludge Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 244000005700 microbiome Species 0.000 claims description 19
- 238000004062 sedimentation Methods 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 230000000813 microbial effect Effects 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims 1
- 238000004065 wastewater treatment Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 210000003800 pharynx Anatomy 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002062 proliferating effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Biological Treatment Of Waste Water (AREA)
Description
【発明の詳細な説明】
本発明は、下水、し尿、工場廃水などの有機性汚水を好
気性微生物によって生物化学的に処理する方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for biochemically treating organic wastewater such as sewage, human waste, and industrial wastewater using aerobic microorganisms.
生物学的処理方式として代表的なものは活性汚泥法であ
るが、次のような重大な欠点が未解決となっている。The activated sludge method is a typical biological treatment method, but the following serious drawbacks remain unresolved.
（１）曝気槽内に一定以上のＭＬＳＳを保持するために
、活性汚泥の濃縮および濃縮汚泥の返送操作を必要とす
るため、活性汚泥の沈降性状の変化によって運転管理条
件がひんばんに変動するため運転が大変難かしい。(1) In order to maintain a certain level of MLSS in the aeration tank, it is necessary to concentrate the activated sludge and return the thickened sludge, so the operational management conditions change frequently due to changes in the sedimentation properties of the activated sludge. This makes driving very difficult.
（２）活性汚泥の沈降性が悪く、しかも活性汚泥濃度（
ＭＬＳＳ）が高くなるにしたがって干渉沈降の理論から
、轟然沈降速度が小さくなるので、沈殿池の分離面積が
膨大となる。(2) The sedimentation property of activated sludge is poor, and the activated sludge concentration (
According to the theory of interference sedimentation, as the MLSS) increases, the rapid sedimentation velocity decreases, so the separation area of the sedimentation basin becomes enormous.
また、粒状固体を曝気槽内に懸濁させ、粒状固体表面に
微生物を付着させて処理する方法があるが、曝気槽から
流出される微生物は非常に小さくあまり凝集していない
ので沈降速度が極めて遅く、このため硫酸ばん土や高分
子凝集剤などを添加しない速やかに沈降しないという問
題点があった。Another method is to suspend granular solids in an aeration tank and allow microorganisms to adhere to the surface of the granular solids, but the microorganisms flowing out of the aeration tank are very small and do not aggregate very well, so the sedimentation rate is extremely low. Therefore, there was a problem in that it did not settle quickly without adding sulfuric acid clay or a polymer flocculant.
本発明は、これら従来の諸欠点を適確に除去し、曝気槽
流出水中の微生物群の沈降速度を著しく向上させ、極め
て容易に固液分離することを目的とするものである。The object of the present invention is to accurately eliminate these conventional drawbacks, to significantly improve the sedimentation rate of microorganisms in the water flowing out of an aeration tank, and to achieve solid-liquid separation extremely easily.
本発明は、砂などの微生物付着用の粒状固体を懸濁させ
た曝気槽において、該曝気槽内あるいは別個に粒状固体
の沈降速度以下で微生物の沈降速度以上の水面積負荷を
設定した粒状固体分離部を設けて、粒状固体を曝気槽内
に自然流下または人為的に返送すると共に該粒状固体分
離部からの流出水に別個に培養した活性汚泥スラリーを
添加混合したのち前記流出水中の微生物群を固液分離苅
ることを特徴とするものである。The present invention provides an aeration tank in which granular solids such as sand for attaching microorganisms are suspended, in which a water area load is set within the aeration tank or separately at a rate lower than the sedimentation rate of the granular solids and higher than the sedimentation rate of the microorganisms. A separation section is provided, and the granular solids are returned to the aeration tank by gravity or artificially, and a separately cultured activated sludge slurry is added to and mixed with the effluent from the granular solid separation section, and then the microorganisms in the effluent are mixed. It is characterized by solid-liquid separation.
すなわち、微生物群を付着させるための粒状固体を懸濁
させた曝気槽から粒状固体分離部を経由して流出する微
生物は、非常に小さくあまり凝集していないので沈降速
度が極めて遅いが、この流出水中に別個に培養した活性
汚泥スラリーを添加混合（添加割合はＩ：０．１〜１０
好ましくは１：０．５〜５で混合）することによって凝
集剤を添加した場合とほぼ同様の凝集効果が発揮される
のである。In other words, the microorganisms that flow out through the granular solid separation section from the aeration tank in which granular solids for adhering microorganisms are suspended are very small and do not aggregate very much, so the sedimentation rate is extremely slow. Activated sludge slurry cultured separately in water is added and mixed (the addition ratio is I: 0.1 to 10
By mixing (preferably at a ratio of 1:0.5 to 5), substantially the same flocculating effect as when a flocculant is added can be achieved.
本発明の一実施態様を図面について説明すると、原水１
は、砂、コークス、活性炭、アンスラサイト、ゼオライ
ト、合成樹脂などの粒状固体Ｓを懸濁させた曝気槽２内
に導かれ、粒状固体表面に付着した好気性微生物によっ
て生物学的反応をうけ、次いで粒状固体Ｓは粒状固体分
離部３にて沈降分離され、増殖微生物は分離されてその
まま流出水１′と共に流出される。To explain one embodiment of the present invention with reference to the drawings, raw water 1
is introduced into an aeration tank 2 in which granular solids S such as sand, coke, activated carbon, anthracite, zeolite, and synthetic resin are suspended, and subjected to a biological reaction by aerobic microorganisms attached to the surface of the granular solids. Next, the granular solid S is sedimented and separated in the granular solid separator 3, and the proliferating microorganisms are separated and discharged as they are together with the effluent water 1'.
一方、原水１の一部を分取して通常の活性汚泥培養槽６
で培養された活性汚泥スラリー５は上記粒状固体分離部
３からの流出水１′に添加され、フロラキュレータ６内
で数分程度混合され、フロック形成されたのち沈殿池Ｔ
に流入し清澄水８と微生物フロック群９に分離される。On the other hand, a part of the raw water 1 is separated and used in a normal activated sludge culture tank 6.
The activated sludge slurry 5 cultured in
and is separated into clear water 8 and microorganism flocs 9.
なお分離された微生物フロック群９の一部は活性汚泥培
養槽４に返送され、他部は余剰汚泥として処分される。Note that a part of the separated microbial floc group 9 is returned to the activated sludge culture tank 4, and the other part is disposed of as surplus sludge.
図中１１．１４は空気又は酸素などのガス供給管、１２
は散気装置、１３は原水バイパス管、１５はスラリー返
流路、１６は攪拌機、１７．１８゜１９は流量調節弁で
必要に応じ設けられる。In the figure, 11.14 is a gas supply pipe for air or oxygen, 12
13 is an aeration device, 13 is a raw water bypass pipe, 15 is a slurry return flow path, 16 is an agitator, and 17.18° and 19 are flow rate control valves, which are provided as necessary.
なお、粒状固体分離部３は、曝気槽２内に隔壁１０を設
けて形成しても、別個に曝気槽２外に設けてもよく、粒
状固体の沈降速度以下で微生物の沈降速度以上の水面積
負荷を設定し、粒状固体を常時曝気槽２内に保持又は返
送しておくことが重要である。The granular solid separation section 3 may be formed by providing a partition wall 10 within the aeration tank 2, or may be provided separately outside the aeration tank 2. It is important to set the area load and to keep or return the granular solids in the aeration tank 2 at all times.
この場合貯留槽又は返送用流路若しくは移送装置例えば
ポンプその他の耐相設備を任意に選んで設けることが考
慮される。In this case, it is conceivable to provide any storage tank or return channel or transfer device, such as a pump or other phase-resistant equipment.
また前記活性汚泥培養槽４にて培養される活性汚泥スラ
リー５は、原水の一部を分取して通常の活性汚泥法で培
養するのが便利であるが、別途から分取してもよい。The activated sludge slurry 5 cultured in the activated sludge culture tank 4 is conveniently cultured by separating a part of the raw water and using a normal activated sludge method, but it may also be separated separately. .
さらに既設の活性汚泥プロセスがある場合には、活性汚
泥培養槽４のかわりに既設の曝気槽内の活性汚泥スラリ
ーを利用してもよい。Furthermore, if there is an existing activated sludge process, activated sludge slurry in the existing aeration tank may be used instead of the activated sludge culture tank 4.
以上述べたように本発明によれば、汚泥返送を行なわず
に曝気槽に常に一定量の粒状固体に付着した微生物群を
維持することができ、また粒状固体分離部からの流出水
中の微細な微生物の沈降速度を著しく向上でき、凝集剤
を用いることなく極めて容易に固液分離することができ
るものであって効果的な曝気作用を与え経済的な運転操
業が可能吉なり浄化効率も著しく向上できるし、処理工
程管理も容易となるなどの利益がある。As described above, according to the present invention, it is possible to maintain a certain amount of microorganisms attached to granular solids in the aeration tank at all times without returning sludge, and it is possible to maintain microorganisms attached to a certain amount of granular solids in the aeration tank without returning sludge. The sedimentation rate of microorganisms can be significantly improved, and solid-liquid separation can be performed extremely easily without the use of coagulants, providing an effective aeration effect and enabling economical operation, which also significantly improves purification efficiency. There are benefits such as ease of process management.
次に本発明の実施例を示す。Next, examples of the present invention will be shown.
ＢＯＤ２５００１）ｐｌｏ、８８３０００ｐｐ［ｎのし
原油化脱離液を河川水などで１０倍に希釈し、０．１〜
０、２ ｍ、の粒径の硼砂が３０係（容積比）添加され
ている粒状固体懸濁曝気槽（滞留時間１．５ｈｒ）に流
量５００ｒＩ？／日で流入させ生物処理した。BOD25001) plo, 883000pp[n, dilute the crude oil desorption solution 10 times with river water, etc., and make 0.1~
A flow rate of 500 rI was applied to a granular solid suspension aeration tank (residence time 1.5 hr) to which borax with a particle size of 0.2 m was added at a ratio of 30 m (volume ratio). /day for biological treatment.
この粒状固体を分離した曝気槽流出水に、前記し原油化
脱離液（ＢＯＤ２５００ｐへ５Ｓ３０００ｐ戸）の一部
３０ｒＩ？／日を採取して滞貯時間６ｈｒで曝気槽にて
培養した活性汚泥スラＩＪ−（ＭＬＳＳ３０００ｐｐｎ
＋）を添加し、上下迂流式フロラキュレーク−（滞留時
間３分）でフロック形成させたのち、沈降分離速度６０
ｍｓ／ ｍｉ ｎの沈殿池に流入させ、沈殿池越流水
の水質を測定したところ、ＢＯＤ８〜１０ｐ＾ ８８１
０〜１５ｐｐＨｌであった。A portion of the above-mentioned crude oil desorption liquid (BOD 2500p to 5S3000p) was added to the aeration tank runoff water from which this granular solid was separated. Activated sludge sludge IJ-(MLSS3000ppn
+) was added, and flocs were formed in an up-and-down roundabout type floculaque (residence time: 3 minutes), and then sedimentation separation rate of 60
ms/min, and the water quality of the overflow water from the settling tank was measured, and the BOD was 8 to 10 p^ 881
It was 0-15 ppHl.
対照例として、活性汚泥スラリーを添加せずに前記と同
様な条件にて生物処理した曝気槽流出水をそのまま上記
沈殿池に流入させたところ、全く沈降分離不可能で、大
部分がキャリオーバーした。As a control example, when the aeration tank effluent that had been biologically treated under the same conditions as above without adding activated sludge slurry was allowed to flow directly into the sedimentation tank, no sedimentation was possible and most of the water carried over. .
このときの沈殿池越流水の水質はＢＯＤ５０〜８０卿、
８８３５０〜４００咽であった。At this time, the water quality of the overflow water from the sedimentation pond was BOD 50 to 80,
It was 88,350 to 400 pharynx.
図面は本発明の一実施態様を示す系統説明図である。
１・・・・・・原水、１′−・・・・・分離された流出
水、２・・・・・・曝気槽、３・・・・・・粒状固体分
離部、４・・・・・・活性汚泥培養槽、５・・・・・・
活性汚泥スラリー、６・・・・・・フロツキュレーク−
１１・・・・・・沈殿池、８・・・・・・清澄処理水、
９・・・・・・微生物フロック群。The drawing is a system explanatory diagram showing one embodiment of the present invention. 1... Raw water, 1'-... Separated runoff water, 2... Aeration tank, 3... Granular solid separation section, 4... ...Activated sludge culture tank, 5...
Activated sludge slurry, 6...Flotscule Lake-
11... Sedimentation tank, 8... Clear treated water,
9...Microbial floc group.
Claims (1)
粒状固体を曝気槽内に懸濁させ、該粒状固体表面に微生
物を付着させて好気的微生物によって生物化学的に生物
処理する方法において、前記曝気槽に設けられ、且つ粒
状固体の沈降速度以下で微生物の沈降速度以上の水面積
負荷を設定した粒状固体分離部から流出水を導出し、該
流出水に別個に培養された活性汚泥スラリーを添加混合
したのち、固液分離することを特徴とする有機性汚水の
処理方法。 ２ 前記曝気槽内の処理が、曝気による酸素移動で還流
させるものであって、粒状固体を粒状固体分離部に流入
させることなく曝気槽内に保持させて処理するものであ
る特許請求の範囲第１項記載の有機性汚水の処理方法。 ３ 前記粒状固体分離工程が曝気槽内で行われて処理さ
れる特許請求の範囲第１項又は第２項記載の有機性汚水
の処理方法。 ４ 前記粒状固体分離工程が、曝気槽と別個に形成され
た槽内で行われて処理される特許請求の範囲第１項又は
第２項記載の有機性汚水の処理方法。 ５ 前記粒状固体分離工程で分離された粒状固体が曝気
槽内に返送して処理する特許請求の範囲第２項、第３項
又は第４項記載の有機性汚水の処理方法。 ６ 前記別個に培養された活性汚泥スラリーが原水の一
部を分流して培養されるものであって、固液分離工程で
分離された微生物フロック群の一部を少くとも混合され
て供給処理されるものである特許請求の範囲第３項、第
４項又は第５項記載の有機性汚水の処理方法。[Claims] 1. Raw water of organic sewage is flowed in, and granular solids for adhering to microorganisms are suspended in an aeration tank, and microorganisms are attached to the surface of the granular solids to be biochemically treated by aerobic microorganisms. In the biological treatment method, the effluent is led out from a granular solid separation unit provided in the aeration tank and set to have a water area load that is lower than the sedimentation rate of the granular solids and higher than the sedimentation rate of the microorganisms, and is separated into the effluent water. A method for treating organic sewage characterized by adding and mixing an activated sludge slurry cultured in organic sludge, followed by solid-liquid separation. 2. The treatment in the aeration tank is to cause reflux by oxygen movement through aeration, and the granular solids are held in the aeration tank and treated without flowing into the granular solid separation section. The method for treating organic wastewater according to item 1. 3. The method for treating organic wastewater according to claim 1 or 2, wherein the granular solid separation step is performed in an aeration tank. 4. The method for treating organic wastewater according to claim 1 or 2, wherein the granular solid separation step is performed in a tank formed separately from an aeration tank. 5. The organic wastewater treatment method according to claim 2, 3, or 4, wherein the granular solids separated in the granular solid separation step are returned to an aeration tank for treatment. 6 The separately cultured activated sludge slurry is cultured by diverting a part of the raw water, and at least part of the microbial floc group separated in the solid-liquid separation process is mixed and supplied. A method for treating organic wastewater according to claim 3, 4, or 5, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52079080A JPS595037B2 (en) | 1977-07-04 | 1977-07-04 | How to treat organic wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52079080A JPS595037B2 (en) | 1977-07-04 | 1977-07-04 | How to treat organic wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5413665A JPS5413665A (en) | 1979-02-01 |
| JPS595037B2 true JPS595037B2 (en) | 1984-02-02 |
Family
ID=13679908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52079080A Expired JPS595037B2 (en) | 1977-07-04 | 1977-07-04 | How to treat organic wastewater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS595037B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5681190A (en) * | 1979-12-06 | 1981-07-02 | Ebara Infilco Co Ltd | Decomposition of sewage such as night soil |
| JPS5851978A (en) * | 1981-09-22 | 1983-03-26 | Kobe Steel Ltd | Purification of excess sludge-contg. waste water |
| DE3506687A1 (en) * | 1985-02-26 | 1986-08-28 | Linde Ag, 6200 Wiesbaden | METHOD AND DEVICE FOR BIOLOGICAL WASTE WATER TREATMENT |
| JP5017854B2 (en) * | 2005-12-14 | 2012-09-05 | 栗田工業株式会社 | Apparatus and method for treating wastewater containing organic matter |
| JP2009119406A (en) * | 2007-11-16 | 2009-06-04 | Hitachi Plant Technologies Ltd | Wastewater treatment method and apparatus |
| JP7099265B2 (en) * | 2018-11-12 | 2022-07-12 | 日本製鉄株式会社 | Wastewater treatment equipment and wastewater treatment method |
-
1977
- 1977-07-04 JP JP52079080A patent/JPS595037B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5413665A (en) | 1979-02-01 |
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