JP3383541B2 - Biological treatment method and apparatus for organic wastewater - Google Patents
Biological treatment method and apparatus for organic wastewaterInfo
- Publication number
- JP3383541B2 JP3383541B2 JP01546897A JP1546897A JP3383541B2 JP 3383541 B2 JP3383541 B2 JP 3383541B2 JP 01546897 A JP01546897 A JP 01546897A JP 1546897 A JP1546897 A JP 1546897A JP 3383541 B2 JP3383541 B2 JP 3383541B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- biological treatment
- aeration
- ozone
- wastewater
- 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 - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 43
- 239000002351 wastewater Substances 0.000 title claims description 30
- 239000010802 sludge Substances 0.000 claims description 88
- 238000005273 aeration Methods 0.000 claims description 34
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000010865 sewage Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 230000000694 effects Effects 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000012795 verification 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
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Treatment Of Sludge (AREA)
- Activated Sludge Processes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は下水、産業排水など
の有機性汚水を生物学的に処理する工程における余剰汚
泥の発生をなくすことができ、しかも汚水の生物処理水
のＣＯＤを悪化させない新規技術に関する。TECHNICAL FIELD The present invention can eliminate the generation of excess sludge in the step of biologically treating organic wastewater such as sewage and industrial wastewater, and does not deteriorate the COD of biologically treated wastewater. Regarding technology.
【０００２】[0002]
【従来の技術】下水、産業排水、し尿、ごみ埋立汚水な
どの活性汚泥処理施設から大量の有機性汚泥（余剰汚
泥、生汚泥など）が毎日発生しており、日本全体で年間
１０００万トンを上回る。この有機性汚泥の処理処分が
最大の問題点になっている。この有機性汚泥は難脱水性
であるため、多量の脱水助剤（ポリマーなど）を添加し
汚泥脱水機で水分８５％程度に脱水し、脱水ケーキを埋
立処理するか、又は焼却処分しているが、脱水助剤コス
ト、脱水ケーキの埋立場所不足、焼却灰の処分場所の不
足、焼却設備費、焼却用重油コストの高さなどの多くの
問題点を抱えている。2. Description of the Related Art Large amounts of organic sludge (excess sludge, raw sludge, etc.) are generated daily from activated sludge treatment facilities such as sewage, industrial wastewater, night soil, and landfill wastewater, and annually generate 10 million tons in Japan. Surpass. The biggest problem is the treatment and disposal of this organic sludge. Since this organic sludge is difficult to dehydrate, a large amount of dehydration aids (polymers, etc.) are added and dehydrated to a water content of about 85% with a sludge dehydrator, and the dehydrated cake is either landfilled or incinerated. However, there are many problems such as dewatering aid cost, shortage of dewatering cake landfill, shortage of incineration ash disposal place, incineration equipment cost, and high cost of heavy oil for incineration.
【０００３】このような問題を解決するため、図２のよ
うな「オゾンを利用した汚泥減量化法」が特開平６−２
０６０８８号公報に開示されている。ここに記載された
技術は、生物処理工程２２に有機汚水１を供給し、生物
処理された有機性汚水を固液分離工程２３にて液分（処
理水４）と固形分（返送汚泥２６、余剰汚泥２５）に分
離し、この固形分のうち余剰汚泥２５の約３倍量をオゾ
ン酸化工程２７にて処理し、オゾン酸化処理されたオゾ
ン酸化汚泥２８を生物処理工程２２に返送する。この公
報に記載された方法は、廃水の活性汚泥処理工程から、
余剰汚泥発生量より約３倍多い量の活性汚泥を引き抜き
オゾン酸化した後、そのまま活性汚泥処理工程に返送す
る方法である。In order to solve such a problem, a "sludge reduction method using ozone" as shown in FIG. 2 is disclosed in JP-A-6-2.
It is disclosed in Japanese Patent Publication No. 06088. The technique described here supplies the organic sewage 1 to the biological treatment step 22, and the organically treated organic sewage is treated in the solid-liquid separation step 23 with a liquid content (treated water 4) and a solid content (returned sludge 26, The excess sludge 25) is separated, and about 3 times the amount of the excess sludge 25 in the solid content is treated in the ozone oxidation step 27, and the ozone-oxidized ozone-oxidized sludge 28 is returned to the biological treatment step 22. The method described in this publication, from the activated sludge treatment process of wastewater,
This is a method in which an amount of activated sludge that is about three times as large as the amount of excess sludge generated is extracted, ozone-oxidized, and then directly returned to the activated sludge treatment process.
【０００４】[0004]
【発明が解決しようとする課題】しかし、本発明者が上
記公報に開示された技術を追試したところ、次のような
欠点があることを見出した。オゾン酸化した汚泥を汚水
生物処理工程の曝気槽に返送し生物処理すると、確かに
オゾン酸化汚泥の一部が分解消滅するが、オゾン酸化汚
泥を曝気すると汚泥から多量の難生物分解性のＣＯＤが
生成し処理水ＣＯＤ濃度を著しく悪化させることが確認
された。本発明者の実験によれば、消滅した汚泥１ｋｇ
−ＳＳあたり約１２０〜１４０ｇのＣＯＤが生成するこ
とを見出した。汚泥をオゾン酸化しＢＯＤ成分に転換し
汚水処理工程の曝気槽に返送するため曝気槽容積に余裕
がない場合は曝気槽ＢＯＤ負荷が高負荷になる。高負荷
になると汚水生物処理工程の余剰汚泥生成率が多くな
り、この結果、オゾン所要量が増加しランニングコスト
の増加を招くという悪循環を招く。However, when the present inventor retested the technique disclosed in the above publication, it was found that there were the following drawbacks. When the ozone-oxidized sludge is returned to the aeration tank of the wastewater biological treatment process and biologically treated, a part of the ozone-oxidized sludge certainly decomposes and disappears. However, when the ozone-oxidized sludge is aerated, a large amount of biodegradable COD is generated from the sludge. It was confirmed that the COD concentration of the produced water remarkably deteriorates. According to experiments conducted by the present inventor, 1 kg of sludge that has disappeared
We have found that about 120-140 g COD is produced per SS. Since sludge is ozone-oxidized and converted into BOD components and returned to the aeration tank in the wastewater treatment process, the aeration tank BOD load becomes high when the aeration tank capacity is insufficient. When the load becomes high, the surplus sludge generation rate in the wastewater biological treatment process increases, resulting in a vicious cycle in which the required ozone amount increases and the running cost increases.
【０００５】公共用水域の富栄養化が大きな問題になっ
ている現在、汚泥の減量化に伴って汚水処理水ＣＯＤが
悪化することは従来技術の大きな欠点であり、汚泥を高
度に減量しながらかつ良好な処理水質を得ることができ
る技術でなければ理想的とは言えない。従って本発明
は、従来の技術の上記欠点を克服し、汚水処理設備の系
外に排出する有機性汚泥をゼロにでき、かつ汚水生物処
理水のＣＯＤがほとんど悪化しない新技術を提供するこ
とを課題とする。At present, when eutrophication of public water areas is a big problem, it is a big drawback of the prior art that the COD of the treated sewage is deteriorated with the reduction of the sludge, and while the sludge is highly reduced. Moreover, it cannot be said to be ideal unless it is a technology that can obtain good treated water quality. Therefore, the present invention provides a new technology that overcomes the above-mentioned drawbacks of the conventional technology, can reduce the organic sludge discharged to the outside of the system of wastewater treatment equipment to zero, and hardly deteriorates the COD of the wastewater biological treatment water. It is an issue.
【０００６】[0006]
【課題を解決するための手段】本発明者はオゾンによる
汚泥の酸化法、オゾン処理した汚泥の生物処理を新規な
態様で結合することにより上記課題を解決できることを
見いだした。すなわち本発明は、有機性汚水の生物処理
工程の汚泥の一部を引き抜き、前記生物処理工程とは別
に設けた曝気工程とオゾン酸化工程の間において循環さ
せたのち、曝気汚泥を固液分離することなく前記生物処
理工程に返送することを特徴とする有機性汚水の生物処
理方法、及び、有機性汚水を生物処理するための活性汚
泥曝気槽と、該汚水の生物処理後に汚泥を固液分離する
ための固液分離装置と、分離汚泥の少なくとも一部を活
性汚泥曝気槽に返送するための汚泥返送手段とを有する
有機性汚水の生物処理装置において、前記活性汚泥曝気
槽とは別に設けた曝気槽とオゾン吸収槽の間においてオ
ゾン酸化汚泥を循環させる曝気汚泥処理装置と、該曝気
汚泥を固液分離することなく前記生物処理工程に返送す
るための曝気汚泥返送手段とを有することを特徴とする
有機性汚水の生物処理装置である。 The present inventor has found that the above problems can be solved by combining a sludge oxidation method with ozone and a biological treatment of ozone-treated sludge in a novel manner. That is, the present invention extracts a part of sludge in the biological treatment process of organic wastewater and circulates it between an aeration process and an ozone oxidation process provided separately from the biological treatment process, and then solid-liquid separates the aerated sludge. the biological treatment method of organic wastewater characterized in that it returned to the biological treatment process without, and fouling activity for biological treatment of organic wastewater
Mud aeration tank and solid-liquid separation of sludge after biological treatment of the wastewater
And the solid-liquid separation device for
Sludge return means for returning to the sludge aeration tank
Aeration of activated sludge in a biological treatment device for organic wastewater
Between the aeration tank and the ozone absorption tank, which are provided separately from the tank,
Aeration sludge treatment device for circulating zon oxidation sludge, and the aeration
Return sludge to the biological treatment process without solid-liquid separation
Aeration sludge returning means for
It is a biological treatment device for organic wastewater .
【０００７】[0007]
【発明の実施の形態】以下、本発明の一実施形態を図１
を参照して詳細に説明する。図１において、汚水１を好
気性微生物によって浄化する活性汚泥処理（活性汚泥曝
気槽）を含む生物処理工程２（生物脱リン法、生物学的
硝化脱窒素法のように嫌気部を付帯する工程でもよい）
により処理し、その後、沈殿層を含む固液分離工程３か
ら汚泥を引き抜き、この引き抜いた汚泥５を本発明の特
徴とする「汚泥消滅工程」に導入する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
Will be described in detail with reference to. In FIG. 1, a biological treatment step 2 including an activated sludge treatment (activated sludge aeration tank) for purifying sewage 1 with aerobic microorganisms (a step of attaching an anaerobic part like a biological dephosphorization method or a biological nitrification denitrification method). But it may be)
After that, the sludge is extracted from the solid-liquid separation step 3 including the precipitation layer, and the extracted sludge 5 is introduced into the "sludge disappearing step" which is a feature of the present invention.
【０００８】すなわち、引き抜き汚泥５の一部を生物処
理工程２の活性汚泥曝気槽とは別個の曝気槽を含む曝気
処理工程７に流入させ曝気しながらオゾン吸収槽（オゾ
ン１０が適宜供給されている）を含むオゾン処理工程８
の間を循環させる。ここで、曝気処理工程７とオゾン処
理工程８の間に循環される循環汚泥９の循環量は、発生
余剰汚泥相当ＳＳ重量の約３倍程度に設定する。本発明
においては、循環させた循環汚泥９は、生物処理工程２
へ、循環処理済汚泥１１として順次すべて返送されるこ
とが望ましい。That is, a part of the drawn sludge 5 is made to flow into an aeration treatment step 7 including an aeration tank different from the activated sludge aeration tank of the biological treatment step 2 while aeration is performed, and an ozone absorption tank (ozone 10 is appropriately supplied) Ozone treatment process including
Circulate between. Here, the circulation amount of the circulation sludge 9 circulated between the aeration treatment process 7 and the ozone treatment process 8 is set to about 3 times the SS weight corresponding to the generated excess sludge. In the present invention, the circulated circulating sludge 9 is the biological treatment step 2
It is desirable that all of the recycled sludge 11 is sequentially returned.
【０００９】このオゾン処理工程８では、循環汚泥９は
オゾンにより酸化され汚泥を微生物が資化可能なＢＯＤ
成分に転換する。また、曝気処理工程７では、オゾン酸
化汚泥を曝気し好気性生物処理すると、オゾン酸化汚泥
（オゾンの酸化作用により微生物による生分解性が向上
している）の一部（ＳＳの３０〜４０％）が活性汚泥
（好気性微生物）によって炭酸ガスと水に分解して消滅
する。In this ozone treatment step 8, the circulating sludge 9 is oxidized by ozone and the sludge can be utilized by microorganisms as a BOD.
Convert to ingredients. In addition, in the aeration treatment step 7, when ozone-oxidizing sludge is aerated and aerobic biological treatment is performed, a part of the ozone-oxidizing sludge (biodegradability by microorganisms is improved by the oxidizing action of ozone) (30-40% of SS) ) Is decomposed into carbon dioxide and water by activated sludge (aerobic microorganisms) and disappears.
【００１０】このようにオゾン処理工程８と曝気処理工
程７の処理を繰り返す循環処理を行うと、オゾン酸化汚
泥が曝気されて生物学的に分解消滅する際に生成した難
生物分解性ＣＯＤ成分が再びオゾン酸化され、難生物分
解性ＣＯＤがオゾンの酸化作用により生物分解性ＣＯＤ
に転換されるという作用が多数回反復される。この結
果、驚くべきことに、曝気処理において難生物分解性Ｃ
ＯＤが生物学的に高度に分解されることが確認された。When the circulation treatment in which the ozone treatment step 8 and the aeration treatment step 7 are repeated is carried out in this manner, the hardly biodegradable COD component produced when the ozone-oxidized sludge is aerated and biologically decomposes and disappears. Ozone is oxidized again and refractory biodegradable COD is biodegradable COD due to the oxidation action of ozone.
The action of being converted into is repeated many times. As a result, surprisingly, in the aeration treatment, the biodegradable C
It was confirmed that the OD was biologically highly degraded.
【００１１】一方、図２に示すような従来技術では、オ
ゾン処理汚泥はそのまま汚水処理工程の生物処理槽に返
送されるため、汚水生物処理槽においてオゾン酸化汚泥
から難生物分解性ＣＯＤが生成し、そのまま処理水の流
出してしまうため、汚水処理水のＣＯＤが著しく悪化し
てしまう。これに対して、本発明に係る生物処理方法で
は、消滅した汚泥１ｋｇ−ＳＳあたりのＣＯＤ生成量は
従来法の約１／８程度、すなわち１５ｇ程度となり著し
く減少することが実験的に確認された。On the other hand, in the prior art as shown in FIG. 2, since the ozone-treated sludge is returned as it is to the biological treatment tank of the wastewater treatment process, the biodegradable COD is generated from the ozone-oxidized sludge in the wastewater biological treatment tank. However, since the treated water flows out as it is, the COD of the sewage treated water is significantly deteriorated. On the other hand, in the biological treatment method according to the present invention, it was experimentally confirmed that the amount of COD produced per 1 kg-SS of extinguished sludge was about ⅛ that of the conventional method, that is, about 15 g, which was significantly reduced. .
【００１２】[0012]
【実施例】以下、本発明の実施例および比較例により、
本発明の効果をより明確にすることができる。
（実施例）図１に示す工程にしたがって下水（平均水質
を第１表に示す）を対象に本発明の実証試験を行なっ
た。第２表に試験条件を示す。EXAMPLES Hereinafter, according to Examples and Comparative Examples of the present invention,
The effect of the present invention can be made clearer. (Example) According to the process shown in FIG. 1, sewage (average water quality is shown in Table 1) was subjected to a verification test of the present invention. Table 2 shows the test conditions.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【表２】 [Table 2]
【００１５】実験の結果、処理開始後１カ月後に処理状
況が安定状態になってから、汚水生物処理工程の最終沈
殿槽の処理水水質の平均値は第３表の第１欄のように高
度にＣＯＤ、ＢＯＤが除去されていた。従って本発明法
では汚泥を消滅させても下水処理水のＣＯＤ悪化はほと
んど認められなかった。また汚泥は６ケ月間の試験の
間、系外に引き抜かなかったが、汚水処理活性汚泥の曝
気槽のＭＬＶＳＳは当初設定した３５００〜３７００ｍ
ｇ／リットルを維持したことから、本発明システム系外
に廃棄する有機性汚泥の発生は無かったことが判明し
た。第３表第２欄は汚泥減量化を行わない場合の下水処
理水水質である。一方、本発明を適用しない通常の活性
汚泥法による余剰汚泥発生量は下水１ｍ 3当たり１２０
〜１３０ｇ−ＳＳであった。As a result of the experiment, one month after the start of the treatment,
After the situation became stable, the final settling of the wastewater biological treatment process
The average value of treated water quality in the Tono tank is high as shown in the first column of Table 3.
COD and BOD were removed every time. Therefore, the method of the present invention
Then, even if the sludge is eliminated, the COD of the sewage treatment water will deteriorate.
It wasn't recognized. Also, sludge will be tested for 6 months.
Although it was not drawn out of the system for a while, sewage treatment activated sludge exposure
MLVSS of air tank is 3500-3700m which was initially set
Since g / liter was maintained,
It was found that there was no organic sludge to be disposed of
It was Table 3, column 2 is sewage treatment when sludge reduction is not performed.
Water quality is water quality. On the other hand, normal activity to which the present invention is not applied
Excess sludge generated by sludge method is 1m of sewage 3Per 120
It was ~ 130 g-SS.
【００１６】[0016]
【表３】 [Table 3]
【００１７】（比較例）本発明と同じ下水、同じ生物処
理工程を用いて従来技術（図２）の工程図にしたがって
運転した結果、下水生物処理水のＣＯＤは第３表の第３
欄のように著しく悪化した。なお、従来技術の運転条件
は、特開平６−２０６０８８号公報の記述にしたがって
余剰活性汚泥発生量の３倍量をオゾン酸化して（オゾン
吸収量０．０５〜０．０８ｇ−オゾン／ｇ−ＳＳ）その
まま下水の活性汚泥処理槽に返送するというものであ
る。(Comparative Example) As a result of operation according to the process diagram of the prior art (FIG. 2) using the same sewage and the same biological treatment process as in the present invention, the COD of the sewage biological treated water is shown in Table 3
It markedly deteriorated as shown in the column. The operating conditions of the prior art are as described in JP-A-6-206088, in which three times the amount of surplus activated sludge generated is ozone-oxidized (ozone absorption amount 0.05 to 0.08 g-ozone / g- SS) The sewage is sent back to the activated sludge treatment tank as it is.
【００１８】[0018]
【発明の効果】したがって、本発明によれば、汚水の生
物処理槽から引抜いた汚泥をオゾン処理し、その後汚水
の曝気槽とは別の曝気槽でオゾン酸化汚泥を生物処理
し、さらにこの汚泥をオゾン酸化工程に循環するように
した結果、有機性汚泥の系外への量をほぼゼロにでき、
かつＣＯＤ除去効果がほとんど悪化しない有機性汚水の
生物処理方法を提供できる。また、本発明によれば、オ
ゾン処理した汚泥を汚水の曝気槽とは別の曝気し、汚泥
を分解消滅させた後、汚水処理の曝気槽（生物処理槽）
に供給するので、従来技術のような汚水の生物処理工程
が高ＢＯＤ負荷になり余剰汚泥生成率が大きくなるとい
う悪循環を招くことがない有機性汚水の生物処理方法を
提供できる。According to the present invention, therefore, the sludge drawn from the biological treatment tank for wastewater is treated with ozone, and then the ozone-oxidized sludge is biologically treated in an aeration tank different from the aeration tank for the wastewater. As a result of recycling the wastewater to the ozone oxidation process, the amount of organic sludge outside the system can be reduced to almost zero,
In addition, it is possible to provide a biological treatment method for organic wastewater in which the COD removal effect is hardly deteriorated. Further, according to the present invention, the ozone-treated sludge is aerated separately from the aeration tank of the wastewater to decompose and eliminate the sludge, and then the aeration tank of the wastewater treatment (biological treatment tank).
Therefore, it is possible to provide a biological treatment method for organic sewage that does not cause a vicious cycle in which the biological treatment process for sewage has a high BOD load and the excess sludge production rate increases as in the prior art.
【図１】本発明に係る有機性汚水の生物処理方法の一実
施形態の処理工程を示す概略図である。FIG. 1 is a schematic view showing a treatment step of an embodiment of a biological treatment method for organic wastewater according to the present invention.
【図２】従来の有機性汚水の生物処理方法を示す概略図
である。FIG. 2 is a schematic view showing a conventional biological treatment method for organic wastewater.
１ 汚水（有機性汚泥） ２ 生物処理工程 ３ 固液分離工程 ４ 処理水 ５ 汚泥 ６ 返送汚泥 ７ 曝気処理工程 ８ オゾン処理工程 ９ 循環汚泥 １０ オゾン １１ 循環処理済汚泥 1 Sewage (organic sludge) 2 biological treatment process 3 Solid-liquid separation process 4 treated water 5 sludge 6 Return sludge 7 Aeration process 8 Ozone treatment process 9 Circulation sludge 10 ozone 11 Circulation-treated sludge
Claims (2)
引き抜き、前記生物処理工程とは別に設けた曝気工程と
オゾン酸化工程の間において循環させたのち、該曝気汚
泥を固液分離することなく前記生物処理工程に返送する
ことを特徴とする有機性汚水の生物処理方法。1. A part of sludge in the biological treatment step of organic wastewater is extracted and circulated between an aeration step and an ozone oxidation step provided separately from the biological treatment step, and then the aerated fouling is conducted.
A method for biological treatment of organic wastewater, comprising returning mud to the biological treatment step without solid-liquid separation .
泥曝気槽と、該汚水の生物処理後に汚泥を固液分離するMud aeration tank and solid-liquid separation of sludge after biological treatment of the wastewater
ための固液分離装置と、分離汚泥の少なくとも一部を活And the solid-liquid separation device for
性汚泥曝気槽に返送するための汚泥返送手段とを有するSludge return means for returning to the sludge aeration tank
有機性汚水の生物処理装置において、前記活性汚泥曝気Aeration of activated sludge in a biological treatment device for organic wastewater
槽とは別に設けた曝気槽とオゾン吸収槽の間においてオBetween the aeration tank and the ozone absorption tank, which are provided separately from the tank,
ゾン酸化汚泥を循環させる曝気汚泥処理装置と、該曝気Aeration sludge treatment device for circulating zon oxidation sludge, and the aeration
汚泥を固液分離することなく前記生物処理工程に返送すReturn sludge to the biological treatment process without solid-liquid separation
るための曝気汚泥返送手段とを有することを特徴とするAeration sludge returning means for
有機性汚水の生物処理装置。Biological treatment equipment for organic wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01546897A JP3383541B2 (en) | 1997-01-29 | 1997-01-29 | Biological treatment method and apparatus for organic wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01546897A JP3383541B2 (en) | 1997-01-29 | 1997-01-29 | Biological treatment method and apparatus for organic wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10211497A JPH10211497A (en) | 1998-08-11 |
| JP3383541B2 true JP3383541B2 (en) | 2003-03-04 |
Family
ID=11889640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01546897A Expired - Fee Related JP3383541B2 (en) | 1997-01-29 | 1997-01-29 | Biological treatment method and apparatus for organic wastewater |
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| Country | Link |
|---|---|
| JP (1) | JP3383541B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502951A (en) * | 2011-11-03 | 2012-06-20 | 安徽国祯环保节能科技股份有限公司 | Auxiliary sludge discharging method and device for aeration basin in oxidation ditch process |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5197901B2 (en) * | 2001-07-23 | 2013-05-15 | 三菱化工機株式会社 | Waste water treatment apparatus and waste water treatment method |
| CN1300020C (en) * | 2005-03-15 | 2007-02-14 | 嘉应学院 | Domestic sewage deeply treating process |
| JP2008036571A (en) * | 2006-08-09 | 2008-02-21 | Fuji Koki Kk | Volume reduction apparatus of waste sludge, and volume reduction methode of waste sludge |
-
1997
- 1997-01-29 JP JP01546897A patent/JP3383541B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502951A (en) * | 2011-11-03 | 2012-06-20 | 安徽国祯环保节能科技股份有限公司 | Auxiliary sludge discharging method and device for aeration basin in oxidation ditch process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10211497A (en) | 1998-08-11 |
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