JPH02293095A - Treatment of organic sewage - Google Patents
Treatment of organic sewageInfo
- Publication number
- JPH02293095A JPH02293095A JP1112087A JP11208789A JPH02293095A JP H02293095 A JPH02293095 A JP H02293095A JP 1112087 A JP1112087 A JP 1112087A JP 11208789 A JP11208789 A JP 11208789A JP H02293095 A JPH02293095 A JP H02293095A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- tank
- alkali
- acid
- treatment
- 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
- 239000010865 sewage Substances 0.000 title claims description 7
- 239000010802 sludge Substances 0.000 claims abstract description 77
- 239000002253 acid Substances 0.000 claims abstract description 21
- 239000003513 alkali Substances 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 25
- 238000005063 solubilization Methods 0.000 claims description 21
- 230000007928 solubilization Effects 0.000 claims description 21
- 238000000926 separation method Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 239000002002 slurry Substances 0.000 abstract description 8
- 230000003381 solubilizing effect Effects 0.000 abstract 3
- 230000001546 nitrifying effect Effects 0.000 abstract 2
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 239000002689 soil Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 5
- 239000010800 human waste Substances 0.000 description 5
- 238000000108 ultra-filtration Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 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
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Sludge (AREA)
- Activated Sludge Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、し尿、下水などの各種有機性汚水の処理方法
に係り、特に、有機性汚水を活性汚泥法などにより、好
気性生物処理を行う際に発生する余剰汚泥を大幅に減少
させ、汚泥処理を合理化する新規方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for treating various organic sewage such as human waste and sewage, and in particular, to aerobic biological treatment of organic sewage by an activated sludge method or the like. This invention relates to a new method that significantly reduces the surplus sludge generated during sludge treatment and streamlines sludge treatment.
従来、有機性汚水の好気性生物処理（活性汚泥法、生物
学的硝化説窒素法など）の最大の問題点は水質を浄化す
る工程に存在するのではなく、むしろ汚泥処理工程にあ
る。Conventionally, the biggest problem with aerobic biological treatment of organic wastewater (activated sludge method, biological nitrification nitrogen method, etc.) lies not in the water purification process, but rather in the sludge treatment process.
すなわち、好気性生物処理方法は、余剰活性汚泥の発生
ｌが非常に多い点に最大の問題点がある。余剰活性汚泥
は、現在脱水後埋立てあるいは焼却処分されているが、
多大の経費と設備を必要としていた。That is, the biggest problem with the aerobic biological treatment method is that a large amount of surplus activated sludge is generated. Surplus activated sludge is currently disposed of in landfills or incinerated after dewatering.
It required a large amount of expense and equipment.
従来の活性汚泥法の余剰汚泥の発生量は、数多くの実験
あるいは実績により、除去ＢＯＯ当り、０．６〜０．
８ （ ｋｇ ＳＳ／ ｋｇ ＢＯＯ ）程度となるこ
とが良く知られている。The amount of surplus sludge generated by the conventional activated sludge method is estimated to be 0.6 to 0.0 per removed BOO, based on numerous experiments and results.
It is well known that it is approximately 8 (kg SS/kg BOO).
その上、余剰汚泥は、質的にも難脱水性であるため、益
々汚泥処理が困難になっている。Furthermore, surplus sludge is qualitatively difficult to dewater, making sludge treatment increasingly difficult.
本発明は、上記のような従来技術の問題点を解決し、余
剰汚泥の発生ｌを著しく減少させることが可能な新規方
法を提供することを目的とする。An object of the present invention is to provide a new method capable of solving the problems of the prior art as described above and significantly reducing the generation of excess sludge.
上記目的を達成するために、本発明では、有機性汚水を
好気性生物処理したのち、固液分離し、該分離された汚
泥の一部を、前記好気性生物処理工程にリサイクルする
一方、残りの汚泥を２分割し、片方に酸を添加してｐ１
１３以下にし、他方にアルカリを添加してｐＨ１０以上
とし、各々、攪拌滞留せしめて可溶化したのち、該酸処
理汚泥とアルカリ処理汚泥とを混合し、混合液を前記好
気性生物処理工程に供給することを特徴とする有機性汚
水の処理方法としたものである。In order to achieve the above object, in the present invention, organic sewage is subjected to aerobic biological treatment and then subjected to solid-liquid separation, and a part of the separated sludge is recycled to the aerobic biological treatment process, while the remaining Divide the sludge into two and add acid to one side to make p1.
13 or less, add alkali to the other to make it pH 10 or more, stir and retain each to solubilize, mix the acid-treated sludge and the alkali-treated sludge, and supply the mixed liquid to the aerobic biological treatment step. This is a method for treating organic wastewater, which is characterized by:
そして、上記の酸およびアルカリによる可溶化工程は、
５０℃以上の温度で行うのがよい。The above solubilization process with acid and alkali is
It is preferable to carry out the process at a temperature of 50°C or higher.
次に、本発明を第１図を参照して詳しく説明する。Next, the present invention will be explained in detail with reference to FIG.
以下は、し尿処理を例に挙げて説明している。The following is an explanation using human waste treatment as an example.
第１図は、本発明の処理方法を示す工程図である。除渣
し尿１は、生物学的硝化脱窒槽２に流入し、硝化・説窒
素されたのち、流出する活性汚泥スラリ−３が限外ろ過
膜（ＵＰ） ４によって、完全にＳＳが捕捉除去され、
清澄な生物処理水５とＵＦ分離スラリ−６となる。なお
、固液分離の手段は、図示例の限外ろ過膜等の膜分離に
かえて、公知の沈降分離、遠心分離等の分離手段でもか
まわない。FIG. 1 is a process diagram showing the treatment method of the present invention. The filtered human waste 1 flows into a biological nitrification and denitrification tank 2 where it is nitrified and nitrogenized, and then the activated sludge slurry 3 that flows out is passed through an ultrafiltration membrane (UP) 4, where SS is completely captured and removed. ,
Clear biologically treated water 5 and UF separation slurry 6 are obtained. Note that, instead of the membrane separation such as the ultrafiltration membrane shown in the illustrated example, the solid-liquid separation means may be a known separation means such as sedimentation separation or centrifugation.
ＵＰ分離スラリ−６の一部７は、硝化脱窒槽２の活性汚
泥濃度を所定濃度に維持するために、返送される。他部
８は、２分割され酸による汚泥の可溶化槽９およびアル
カリによる汚泥の可溶化槽１０に供給される。９ ’
， １０’は各々鉱酸および水酸化アルカリである。A portion 7 of the UP separation slurry 6 is returned in order to maintain the activated sludge concentration in the nitrification-denitrification tank 2 at a predetermined concentration. The other portion 8 is divided into two parts and supplied to an acid sludge solubilization tank 9 and an alkali sludge solubilization tank 10. 9'
, 10' are a mineral acid and an alkali hydroxide, respectively.
しかして、酸又はアルカリによる汚泥の可溶化槽９．１
０において汚泥中の有機物の加水分解反応を進行させる
。活性汚泥は炭水化物、たん白質、脂質から構成されて
おり、活性汚泥細胞の外層には、閑体外高分子（バイオ
ボリマ）が多量に存在しているが、強酸性あるいは強ア
ルカリ性の雰囲気にさらされると、これらの活性汚泥菌
体を構成しているバイオボリマー、炭水化物、蛋白質な
どが加水分解を受け、低分子化されて分子コロイド状に
なり、可溶化される。Therefore, sludge solubilization tank 9.1 with acid or alkali
At 0, the hydrolysis reaction of organic matter in the sludge is allowed to proceed. Activated sludge is composed of carbohydrates, proteins, and lipids, and the outer layer of activated sludge cells contains a large amount of extraneous polymers (biovolima), but when exposed to a strongly acidic or alkaline atmosphere, The biobolymers, carbohydrates, proteins, etc. that make up these activated sludge cells are hydrolyzed, reduced to a molecular colloid, and solubilized.
低分子化された可溶化有機コロイドは、微生物による資
化性が顕著に向上するので、これらを、再び活性汚泥が
存在する硝化説窒槽２に返送供給すると、可溶化された
有機物は活性汚泥（主に脱窒素菌）によって資化されて
、最終的にＣＯ２と１１，０に分解される。この結果、
余剰活性汚泥の発生量が減少する。The ability of solubilized organic colloids reduced to low molecular weight to be assimilated by microorganisms is significantly improved, so when these are returned to the nitrification tank 2 where activated sludge is present, the solubilized organic matter is converted into activated sludge ( It is mainly assimilated by denitrifying bacteria) and finally decomposed into CO2 and 11,0. As a result,
The amount of surplus activated sludge generated is reduced.
本発明においては、可溶化対象汚泥を２分割し、各々に
ついて酸あるいはアルカリによる加水分解を行ったのち
、これらを合流混合させてから硝化脱窒槽２に供給する
ことが重要である。In the present invention, it is important to divide the sludge to be solubilized into two parts, perform hydrolysis with acid or alkali on each part, and then mix them together before supplying them to the nitrification-denitrification tank 2.
もしも、酸処理のみ、あるいはアルカリによる可溶化処
理のみを行ってから、可溶化汚泥を硝化説窒槽２に流入
させると、硝化脱窒槽２のｐｌ＋が酸性あるいはアルカ
リ性にかたよってしまい、硝化脱窒閑にとって好適なｐ
Ｈ条件（中性）から偏寄してしまい、硝化脱窒反応が著
しく悪化する。If solubilized sludge is allowed to flow into the nitrification/denitrification tank 2 after performing only acid treatment or only solubilization treatment with alkali, the pl+ in the nitrification/denitrification tank 2 will become acidic or alkaline, and the nitrification/denitrification p suitable for
The condition will be biased away from the H condition (neutral), and the nitrification-denitrification reaction will be significantly deteriorated.
しかるに、本発明では、酸可溶化汚泥とアルカリ可溶化
汚泥とを合流し、攪拌槽ｌ１で混合中和してから、生物
処理槽２に返送するので、このようなトラブルを招かな
い。However, in the present invention, the acid-solubilized sludge and the alkali-solubilized sludge are combined, mixed and neutralized in the stirring tank 11, and then returned to the biological treatment tank 2, so that such troubles are not caused.
しかも、酸による可溶化法単独あるいはアルカリによる
可溶化法単独では、それぞれ、可溶化処理のあとで、ア
ルカリ剤又は酸による中和を行う必要があり、このアル
カリまたは、酸は単に中和剤として使われるだけで、汚
泥の可溶化に寄与しないため、いたずらに薬品コストが
増加するという欠点がある。これに対し、本発明では、
こうした欠点がない。Moreover, when using acid solubilization alone or alkali solubilization alone, it is necessary to perform neutralization with an alkaline agent or acid after the solubilization treatment, and this alkali or acid is used simply as a neutralizing agent. Since it does not contribute to the solubilization of sludge even if it is used, it has the disadvantage of unnecessarily increasing chemical costs. In contrast, in the present invention,
It doesn't have these drawbacks.
しかして、本発明による方法を採用すると、従来プロセ
スに比較して、余剰汚泥の発生１が減少するが、酸又は
アルカリによっても可溶化しない汚泥は、不可避的に余
剰汚泥となるので、管路ｌ２あるいは１２′より、余剰
汚泥を抜き出し、汚泥脱水工程１３に供給し、脱水汚泥
ｌ４と脱水分離液１５に分離する。脱水分離液ｌ５は生
物処理槽２に供給されて処理される。Therefore, when the method according to the present invention is adopted, the generation of surplus sludge is reduced compared to the conventional process, but since sludge that cannot be solubilized by acid or alkali inevitably becomes surplus sludge, Excess sludge is extracted from l2 or 12' and supplied to a sludge dewatering step 13, where it is separated into dehydrated sludge l4 and dehydrated separated liquid 15. The dehydrated separated liquid 15 is supplied to the biological treatment tank 2 and treated.
なお、酸またはアルカリによる可溶化のｐＨの最適条件
は、実験の結果から、酸の場合はｐ｝１３以下、アルカ
リ可溶化法の場合はｐ ｔｌ １ ０以上であり、さら
に温度条件としては、５０℃以上、混和時間は３〜４８
ｈｒ （汚泥性状によって異なる）が好適であることが
認められた。In addition, the optimum pH conditions for solubilization with acid or alkali are, from the results of experiments, p}13 or less in the case of acid, and p tl 1 0 or more in the case of alkali solubilization, and the temperature conditions are as follows: 50℃ or higher, mixing time 3-48
hr (depending on sludge properties) was found to be suitable.
温度と滞留時間の適正値は、汚泥の性状によって、大き
く変化するので一概には決定できないが、汚泥の可溶化
率５０％以上を得るためには、ｐ｛１３以下又はｐ＋＋
ｔｏ以上の条件が不可欠であることがまた温度は５０℃
以上が好ましいことが認められた。Appropriate values for temperature and residence time cannot be determined unconditionally because they vary greatly depending on the properties of sludge, but in order to obtain a sludge solubilization rate of 50% or more, p{13 or less or p++
It is also essential that the conditions are above 50°C.
It was recognized that the above is preferable.
また、可溶化処理と同時に、もしくは先立って、超音波
処理を行うと可溶化効果がやや向上することもｌ忍めら
れた。It was also observed that the solubilization effect would be slightly improved if ultrasonic treatment was performed simultaneously with or prior to the solubilization treatment.
以下、実施例により、本発明を詳述するが、本発明はこ
れらの実施例に限定されない。EXAMPLES Hereinafter, the present invention will be explained in detail with reference to Examples, but the present invention is not limited to these Examples.
実施例１
表１に示す水質の除渣し尿を表２に示す処理条件で無希
釈で生物学的硝化脱窒処理を行った。Example 1 A biological nitrification and denitrification treatment was carried out on the sediment-removed human urine having the water quality shown in Table 1 under the treatment conditions shown in Table 2 without dilution.
表−１ 除渣し尿水質
留させて、汚泥を可溶化した。次の式で定義される汚泥
可溶化率は、ＩＩｃＩ処理の場合５５％、アルカリ処理
の場合７８％となった。Table 1 The sludge was solubilized by removing the sludge and distilling the urine water. The sludge solubilization rate defined by the following formula was 55% in the IIcI treatment and 78% in the alkali treatment.
その後、活性汚泥スラリーをＵＦ膜（限外ろ過膜）で固
液分離し、汚泥固形物濃度２．０〜２．２％のＵＰ分離
汚泥を得た。Thereafter, the activated sludge slurry was subjected to solid-liquid separation using a UF membrane (ultrafiltration membrane) to obtain UP-separated sludge with a sludge solids concentration of 2.0 to 2.2%.
このうちの５０％を生物学的硝化脱窒槽に返送する一方
、残りの５０％のＵＰ分離汚泥を２等分し、片方にＩＩ
ｃＩを添加し、９１１２．０とした。他方の汚泥にＮ
ａ Ｏｆｆを添加し、ｐＨ １１とし、酸又はアルカリ
添加汚泥を７０℃に加温しつつ２４ｈ『混和滞しかるの
ち、両汚泥を混合し、中和せしめた結果、中和汚泥のｐ
ｉｆは５．２〜５．８となった。この中和汚泥を前記の
生物学的硝化脱窒処理槽に供給して、６ケ月間のロング
ランテストを行った。50% of this is returned to the biological nitrification-denitrification tank, while the remaining 50% of the UP separated sludge is divided into two equal parts, one of which is
cI was added to give 9112.0. N to the other sludge
A Off was added to adjust the pH to 11, and the acid or alkali added sludge was heated to 70°C for 24 hours. After mixing and stagnation, both sludges were mixed and neutralized.
if was 5.2 to 5.8. This neutralized sludge was supplied to the biological nitrification and denitrification treatment tank described above, and a long run test for 6 months was conducted.
この結果、生物学的硝化脱窒工程の肛ＳＳ濃度を設定値
に維持するのに必要な余剰汚泥引抜き量は、し尿１ ｍ
３あたり、２． ５ 〜３．１（ｋｇｄ， ｓｏｌ：
ｄｓ／ｍ３）であった。As a result, the amount of excess sludge required to maintain the SS concentration at the set value in the biological nitrification and denitrification process is 1 m of human waste.
Per 3, 2. 5 ~ 3.1 (kgd, sol:
ds/m3).
また、ＵＦ膜透過水の水質は表−３の左欄となった。In addition, the quality of the water permeated through the UF membrane was shown in the left column of Table 3.
〔比較例１〕
実施例ｌにおける、酸可溶化およびアルカリ可溶化処理
工程を省略した以外は、全く同一の条件で実施例１の実
験とパラレルに実験し、これを対照実験とした。[Comparative Example 1] An experiment was carried out in parallel to the experiment of Example 1 under exactly the same conditions except that the acid solubilization and alkali solubilization treatment steps in Example I were omitted, and this was used as a control experiment.
この結果６ケ月の余剰汚泥の発生量は４．９〜６．６
ｋｇ−ｄｓ／ ｍ’となり、本発明に比較し、約２倍の
余剰汚泥発生蚤となった。As a result, the amount of surplus sludge generated over 6 months is 4.9 to 6.6
kg-ds/m', and the amount of excess sludge generated was approximately twice that of the present invention.
またＵＦ膜透過水の水質は、表−３の左欄となった。The quality of the water permeated through the UF membrane was shown in the left column of Table 3.
表−３ ０ＦＷＸ透過水（生物処理水）水質Table-3 0FWX permeate water (biological treatment water) water quality
第１図は本発明の処理方法を示す工程図である。
ｌ・・・有機性汚水（除渣し尿） ２・・・好気性生
物処理槽（生物学的硝化脱窒槽） ３・・・活性汚泥
スラリ− ４・・・固液分離工程（限外ろ過槽） ５
・・・清澄な処理水、６・・・分離汚泥、７・・・返送
汚泥、９・・・酸可溶化槽、１０・・・アルカリ可溶化
槽、１１・・・攪拌混合槽、１３・・・汚泥説水工程、
１４・・・脱水汚泥
〔発明の効果〕
本発明によれば、次のような効果を奏する。
■ 余剰活性汚泥の発生量が減少し、汚泥処理工程が運
転費、設備費ともに合理化される。
■ 汚泥の可溶化のあとの中和用の薬品を必要としない
ので、運転経費が節減される。
特許出願人 荏原インフィルコ株式会社同 株
式会社 荏原総合研究所FIG. 1 is a process diagram showing the treatment method of the present invention. 1...Organic sewage (removed human waste) 2...Aerobic biological treatment tank (biological nitrification and denitrification tank) 3...Activated sludge slurry 4...Solid-liquid separation process (ultrafiltration tank) ) 5
... Clear treated water, 6. Separated sludge, 7. Return sludge, 9. Acid solubilization tank, 10. Alkali solubilization tank, 11. Stirring mixing tank, 13.・・Sludge dewatering process,
14... Dehydrated sludge [Effects of the invention] According to the present invention, the following effects are achieved. ■ The amount of surplus activated sludge generated is reduced, and the operating and equipment costs of the sludge treatment process are streamlined. ■ Operating costs are reduced because no chemicals are required for neutralization after sludge solubilization. Patent applicant Ebara Infilco Corporation Ebara Research Institute, Inc.
Claims (1)
、該分離された汚泥の一部を、前記好気性生物処理工程
にリサイクルする一方、残りの汚泥を２分割し、片方に
酸を添加してｐＨ３以下にし、他方にアルカリを添加し
てｐＨ１０以上とし、各々攪拌滞留せしめて可溶化した
のち、該酸処理汚泥とアルカリ処理汚泥とを混合し、混
合液を前記好気性生物処理工程に供給することを特徴と
する有機性汚水の処理方法。 ２、前記酸およびアルカリによる可溶化工程を、５０℃
以上の温度で行うことを特徴とする請求項１記載の有機
性汚水の処理方法。[Claims] 1. After subjecting organic sewage to aerobic biological treatment, solid-liquid separation is carried out, and a part of the separated sludge is recycled to the aerobic biological treatment process, while the remaining sludge is Divide the sludge into two parts, add acid to one side to make it pH 3 or less, add alkali to the other one to make it pH 10 or more, stir and retain each to solubilize, and then mix the acid-treated sludge and the alkali-treated sludge to make a mixed solution. A method for treating organic wastewater, characterized in that the organic wastewater is supplied to the aerobic biological treatment step. 2. The acid and alkali solubilization step is carried out at 50°C.
The method for treating organic wastewater according to claim 1, characterized in that the treatment is carried out at a temperature higher than or equal to the temperature above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1112087A JPH02293095A (en) | 1989-05-02 | 1989-05-02 | Treatment of organic sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1112087A JPH02293095A (en) | 1989-05-02 | 1989-05-02 | Treatment of organic sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02293095A true JPH02293095A (en) | 1990-12-04 |
| JPH05119B2 JPH05119B2 (en) | 1993-01-05 |
Family
ID=14577771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1112087A Granted JPH02293095A (en) | 1989-05-02 | 1989-05-02 | Treatment of organic sewage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02293095A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181349A (en) * | 2002-12-03 | 2004-07-02 | Mitsubishi Heavy Ind Ltd | Apparatus and method for sludge treatment |
| JP2006026524A (en) * | 2004-07-15 | 2006-02-02 | Hitachi Plant Eng & Constr Co Ltd | Method and apparatus for volume-reducing surplus sludge |
| JP2008221190A (en) * | 2007-03-15 | 2008-09-25 | Sumitomo Heavy Ind Ltd | Wastewater treatment apparatus |
| JP2010036074A (en) * | 2008-08-01 | 2010-02-18 | Nittetsu Kankyo Engineering Kk | Organic wastewater treatment method |
| JP2013505828A (en) * | 2009-09-28 | 2013-02-21 | ニューリシ ソチエタ ペル アチオニ | Waste, especially sludge treatment method derived from wastewater purification |
| JP2013202469A (en) * | 2012-03-28 | 2013-10-07 | Nippon Steel & Sumikin Eco-Tech Corp | Biotreatment process for organic wastewater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4911813A (en) * | 1972-04-12 | 1974-02-01 | ||
| JPS5321222A (en) * | 1976-08-11 | 1978-02-27 | Bayer Ag | Bissbenzoxazolyl compound |
| JPS5719719A (en) * | 1980-07-10 | 1982-02-02 | Canon Inc | Electric power source holding device of camera |
-
1989
- 1989-05-02 JP JP1112087A patent/JPH02293095A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4911813A (en) * | 1972-04-12 | 1974-02-01 | ||
| JPS5321222A (en) * | 1976-08-11 | 1978-02-27 | Bayer Ag | Bissbenzoxazolyl compound |
| JPS5719719A (en) * | 1980-07-10 | 1982-02-02 | Canon Inc | Electric power source holding device of camera |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181349A (en) * | 2002-12-03 | 2004-07-02 | Mitsubishi Heavy Ind Ltd | Apparatus and method for sludge treatment |
| JP2006026524A (en) * | 2004-07-15 | 2006-02-02 | Hitachi Plant Eng & Constr Co Ltd | Method and apparatus for volume-reducing surplus sludge |
| JP2008221190A (en) * | 2007-03-15 | 2008-09-25 | Sumitomo Heavy Ind Ltd | Wastewater treatment apparatus |
| JP2010036074A (en) * | 2008-08-01 | 2010-02-18 | Nittetsu Kankyo Engineering Kk | Organic wastewater treatment method |
| JP2013505828A (en) * | 2009-09-28 | 2013-02-21 | ニューリシ ソチエタ ペル アチオニ | Waste, especially sludge treatment method derived from wastewater purification |
| JP2013202469A (en) * | 2012-03-28 | 2013-10-07 | Nippon Steel & Sumikin Eco-Tech Corp | Biotreatment process for organic wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05119B2 (en) | 1993-01-05 |
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