JP3400622B2 - Method and apparatus for treating organic sewage - Google Patents
Method and apparatus for treating organic sewageInfo
- Publication number
- JP3400622B2 JP3400622B2 JP28200995A JP28200995A JP3400622B2 JP 3400622 B2 JP3400622 B2 JP 3400622B2 JP 28200995 A JP28200995 A JP 28200995A JP 28200995 A JP28200995 A JP 28200995A JP 3400622 B2 JP3400622 B2 JP 3400622B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- biological treatment
- ozone
- ozone oxidation
- organic sewage
- 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
- 239000010865 sewage Substances 0.000 title claims description 23
- 238000000034 method Methods 0.000 title claims description 20
- 239000010802 sludge Substances 0.000 claims description 73
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 46
- 230000003647 oxidation Effects 0.000 claims description 24
- 238000007254 oxidation reaction Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000003513 alkali Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005063 solubilization Methods 0.000 description 2
- 230000007928 solubilization Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000013585 weight reducing agent 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
- Activated Sludge Processes (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Treatment Of Sludge (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、下水などの有機性
汚水を生物処理して浄化する処理する際に、その生物処
理に伴って発生する余剰生物汚泥量を著しく低減させる
ようにした有機性汚水の処理方法及びその装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when organically treating sewage and other organic sewage by biological treatment, purifies the amount of surplus biological sludge generated by the biological treatment. The present invention relates to a wastewater treatment method and apparatus.
【０００２】[0002]
【従来の技術】従来から下水などの有機性汚水の浄化処
理においては、活性汚泥法などの生物処理が主として用
いられているが、その生物処理においてはその処理に際
してかなりの余剰汚泥が発生することが大きな問題であ
って、その余剰汚泥量を減量する方法が多数提案され、
その１つとして特公昭５７−１９７１９号、特開平６−
２０６０８８号などが公知である。この技術は、有機性
汚泥をオゾン酸化して可溶化した後好気性微生物により
生物学的にＣＯ2 ，Ｈ2 Ｏに分解する技術である。しか
し、これらの技術を本発明者が追試してみたところ、汚
泥を可溶化するためには、高価なオゾンが多量に必要で
あり、ランニングコストが高額になり実用的でないとい
う問題点が認められた。2. Description of the Related Art Conventionally, biological treatment such as activated sludge method has been mainly used for purification of organic sewage such as sewage, but in the biological treatment, a considerable amount of excess sludge is generated during the treatment. Is a big problem, and many methods to reduce the amount of excess sludge have been proposed,
As one of them, Japanese Patent Publication No. 57-19719 and Japanese Patent Laid-Open No.
No. 206088 is known. This technique is a technique in which organic sludge is oxidized by ozone and solubilized, and then biologically decomposed into CO 2 and H 2 O by aerobic microorganisms. However, when the present inventor re-tried these techniques, in order to solubilize the sludge, a large amount of expensive ozone was required, and the running cost became high and the problem that it was not practical was recognized. It was
【０００３】[0003]
【発明が解決しようとする課題】オゾンの製造上その転
換効率が低いためにその価格は比較的高いものであり、
一方オゾンはその酸化力はあまり高い方でないために、
通常の条件でオゾンを使用すると汚泥を可溶化するのに
オゾンを多量に必要とすることとなる。本発明は、有機
性汚泥の生物処理において、少量のオゾンの使用によっ
て効果的に汚泥の減容を行うことができる実用性の高い
新しい技術を確立しようするものである。Since ozone has a low conversion efficiency in production, its price is relatively high.
On the other hand, ozone is not so high in its oxidizing power,
When ozone is used under normal conditions, a large amount of ozone is required to solubilize sludge. The present invention aims to establish a highly practical new technique capable of effectively reducing the volume of sludge by using a small amount of ozone in the biological treatment of organic sludge.
【０００４】[0004]
【課題を解決するための手段】本発明者は、汚泥に対し
てオゾンが有効に作用する条件を種々検討したした結
果、最も有効な条件を見い出した。すなわち、本発明は
下記の手段により前記の課題を解決することができた。
（１） 有機性汚水を生物処理して浄化する処理方法に
おいて、有機性汚水を生物処理工程に導入して処理し、
前記生物処理工程からの流出液を固液分離し、その固液
分離による得られた分離汚泥の少なくとも一部を前記生
物処理工程に返送し、前記分離汚泥の残りの一部をｐＨ
９〜１１のアルカリ性条件下でオゾン酸化し、前記オゾ
ン酸化で得られたオゾン酸化汚泥を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処理方法。As a result of various studies on conditions under which ozone effectively acts on sludge, the present inventor found the most effective conditions. That is, the present invention was able to solve the above problems by the following means. (1) In a treatment method of biologically treating and purifying organic sewage, the organic sewage is introduced into a biological treatment step and treated,
The solid-liquid separation of the effluent from the biological treatment step, and returning at least a portion of the separated sludge obtained by the solid-liquid separation in the biological treatment step, pH of the remaining part of the separation sludge
A method for treating organic sewage, which comprises oxidizing ozone under alkaline conditions 9 to 11 and returning the ozone-oxidizing sludge obtained by the ozone oxidation to the biological treatment step.
【０００５】（２） 有機性汚水を生物処理して浄化す
る処理装置において、有機性汚水を導入して処理する生
物処理装置、前記生物処理装置からの流出液を固液分離
する固液分離装置、その固液分離装置で得られた分離汚
泥の少なくとも一部を前記生物処理装置に返送するため
の返送管、前記分離汚泥の残りの一部をオゾン酸化槽へ
送る移送管、又は前記生物処理装置から引き抜いた汚泥
をオゾン酸化槽へ送る移送管、前記分離汚泥の残りの一
部をｐＨ９〜１１のアルカリ性条件下でオゾン酸化する
オゾン酸化槽、前記オゾン酸化槽からオゾン酸化汚泥を
前記生物処理装置に返送する返送管から構成されること
を特徴とする有機性汚水の処理装置。(2) In a treatment device for biologically treating and purifying organic sewage, a biological treatment device for introducing and treating organic sewage, and a solid-liquid separation device for separating liquid effluent from the biological treatment device into solid and liquid A return pipe for returning at least a part of the separated sludge obtained by the solid-liquid separation device to the biological treatment device, a transfer pipe for sending the remaining part of the separated sludge to an ozone oxidation tank, or the biological treatment A transfer pipe that sends the sludge extracted from the equipment to the ozone oxidation tank, and one of the remaining sludge
Device for treating organic sewage, characterized in that it comprises an ozone oxidizing tank for ozone-oxidizing a part thereof under alkaline conditions of pH 9 to 11, and a return pipe for returning ozone-oxidizing sludge from the ozone oxidizing tank to the biological treatment apparatus. .
【０００６】[0006]
【発明の実施の形態】本発明を図面を用いてその実施の
形態を具体的に説明する。生物処理工程を行う生物処理
槽１、ここでは活性汚泥法の曝気槽に有機性汚水として
下水２（下水を「原水」ということがある）を供給して
好気性生物処理を行う。この生物処理工程としては、標
準的な活性汚泥法の外に生物学的硝化脱窒素法、嫌気好
気法を採用するすることができる。生物処理槽１から出
た活性汚泥スラリーは、沈殿槽４に送られてそこで固液
分離が行われ、浄化した処理水５が得られる。また、分
離された沈殿汚泥６の大部分を返送汚泥７として生物処
理槽１に返送する。また、沈殿汚泥の一部８にアルカリ
９を添加してｐＨ９〜１１程度のアルカリ条件とし、好
気性消化槽１０において数時間攪拌した後、オゾン酸化
槽１１に入れてオゾン酸化する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be specifically described with reference to the drawings. An aerobic biological treatment is performed by supplying sewage 2 (sewage may be referred to as “raw water”) as organic sewage to a biological treatment tank 1 for performing a biological treatment process, here an aeration tank of the activated sludge method. As the biological treatment step, a biological nitrification denitrification method and an anaerobic aerobic method can be adopted in addition to the standard activated sludge method. The activated sludge slurry discharged from the biological treatment tank 1 is sent to a settling tank 4 where solid-liquid separation is performed, and purified treated water 5 is obtained. Further, most of the separated settled sludge 6 is returned to the biological treatment tank 1 as return sludge 7. Further, alkali 9 is added to a part 8 of the settled sludge to adjust the pH to an alkaline condition of about 9 to 11, the mixture is stirred in the aerobic digestion tank 10 for several hours, and then placed in the ozone oxidation tank 11 for ozone oxidation.
【０００７】また、別の態様として、沈殿汚泥の一部８
と共に生物処理槽１からの活性汚泥スラリー３の一部を
合わせ、それにアルカリを添加するようにすることもで
きる。[0007] In addition, as another embodiment, a portion of the settled sludge 8
At the same time, part of the activated sludge slurry 3 from the biological treatment tank 1 may be combined and alkali may be added thereto.
【０００８】この工程におけるオゾン酸化により、次の
ような興味深い現象が生ずる。すなわち、図２に示した
実験結果にみるように、生物汚泥をアルカリ条件でオゾ
ン酸化すると、ｐＨが中性の汚泥をオゾン酸化する場合
よりも少量のオゾン添加率で汚泥の可溶化が進ことが見
いだされた。図２は、ｐＨ７．３の生物汚泥をオゾン酸
化した場合と水酸化ナトリウムを添加しｐＨ１０に調整
した汚泥を４時間攪拌した後、オゾン酸化した結果を示
したものである。図２によれば、従来法（ｐＨ中性の汚
泥を直接オゾン酸化する方法）に比べて少量のオゾンで
汚泥減少率が向上していることが明らかである。このよ
うな現象が生ずる原因は現時点では不明であるが、おそ
らく生物汚泥をアルカリ性条件下で攪拌すると、微生物
細胞を保護する菌体外高分子が溶脱し、オゾンにより細
胞壁が破壊され易くなり、汚泥の可溶化が進行し易くな
るためではないかと考えられる。Ozone oxidation in this process causes the following interesting phenomenon. That is, as seen in the experimental results shown in FIG. 2, when the biological sludge is ozone-oxidized under alkaline conditions, the sludge solubilization proceeds at a smaller ozone addition rate than when the sludge having a neutral pH is ozone-oxidized. Was found. FIG. 2 shows the results of ozone oxidation of biological sludge having a pH of 7.3 and the results of ozone oxidation after sludge having pH adjusted to 10 by adding sodium hydroxide was stirred for 4 hours. According to FIG. 2, it is clear that the sludge reduction rate is improved with a small amount of ozone as compared with the conventional method (method of directly ozone-oxidizing pH-neutral sludge). The cause of this phenomenon is unknown at this time, but if biological sludge is agitated under alkaline conditions, the extracellular polymer that protects the microbial cells will be leached out, and ozone will easily destroy the cell wall. It is thought that this may be because the solubilization of sucrose becomes easier to proceed.
【０００９】アルカリ処理のｐＨは、９〜１１が好まし
い。これ以下のｐＨでは効果が少なく、これ以上のｐＨ
では生物汚泥から褐色を帯びた色度成分（難生物分解性
ＣＯＤ）が多量に溶出し、処理水の水質を悪化させるの
で避けた方が良い。ｐＨ９〜１１の範囲においても汚泥
から色度成分が少量溶出するが、オゾン酸化工程でほぼ
完全に脱色されるので、処理水５の色度が増加するトラ
ブルは起きないことが確認された。なお、汚泥をアルカ
リ性にするには、アルカリ剤の添加の手段に代えて、汚
泥を電気分解することにより汚泥にＯＨ- イオンを供給
するようにしてもよい。The pH of the alkali treatment is preferably 9-11. If the pH is lower than this, the effect is small, and if the pH is higher than this,
However, a large amount of brownish chromaticity component (hardly biodegradable COD) is eluted from the biological sludge and deteriorates the water quality of the treated water, so it should be avoided. It was confirmed that even in the pH range of 9 to 11, a small amount of the chromaticity component was eluted from the sludge, but the chromaticity of the treated water 5 did not increase because it was almost completely decolorized in the ozone oxidation step. In order to make the sludge alkaline, instead of adding the alkaline agent, OH − ions may be supplied to the sludge by electrolyzing the sludge.
【００１０】オゾン酸化後の汚泥（「オゾン酸化汚泥」
という）１３は、生物処理槽１へ返送する。オゾン酸化
汚泥１３に含まれる、オゾン酸化槽において可溶化しな
かった生物汚泥分は、その生物処理槽１において更に分
解が進み、再び攪拌槽１０、オゾン酸化槽１１に循環さ
れて繰り返し分解される結果、生物汚泥はほぼ完全に分
解され。オゾン酸化槽１１に供給される生物汚泥量は、
生物処理槽１内のＭＬＳＳ濃度が所定範囲に維持される
ように制御する。前記のＭＬＳＳ濃度の所定範囲として
は、例えば４０００〜６０００ｍｇ／リットルとする。
また、前記ＭＬＳＳ濃度の制御は、生物処理槽１内にＭ
ＬＳＳ自動測定器を設置することによって容易に行うこ
とができる。Sludge after ozone oxidation (“ozone oxidation sludge”)
13) is returned to the biological treatment tank 1. The biological sludge contained in the ozone-oxidizing sludge 13 that has not been solubilized in the ozone-oxidizing tank is further decomposed in the biological-treating tank 1, and is circulated again in the stirring tank 10 and the ozone-oxidizing tank 11 to be repeatedly decomposed. As a result, biological sludge is almost completely decomposed. The amount of biological sludge supplied to the ozone oxidation tank 11 is
The MLSS concentration in the biological treatment tank 1 is controlled so as to be maintained within a predetermined range. The predetermined range of the MLSS concentration is, for example, 4000 to 6000 mg / liter.
In addition, the control of the MLSS concentration is performed in the biological treatment tank 1 with M
This can be easily done by installing an LSS automatic measuring device.
【００１１】[0011]
【実施例】以下、実施例によって本発明を具体的に説明
する。ただし、本発明はこの実施例のみに限定されるも
のではない。
実施例１
処理対象の有機性汚水として下水を用い、図１に示す本
発明の生物処理工程に基づいて生物学的処理を行った。
この場合、沈殿槽４からの沈殿汚泥の一部のみを攪拌槽
１０へ送るようにした。処理対象の下水の平均水質を第
１表に示す。また、試験条件については第２表に示す。
後記する条件で１年間試験を行った結果、処理水の平均
水質はＳＳが３．４ｍｇ／リットル、ＢＯＤが５ｍｇ／
リットル、ＣＯＤが９．６ｍｇ／リットルとなり、良好
な処理水が得られる。余剰生物汚泥発生量は下水１ｍ3
当たり５．８〜６．８ｇ・ＳＳと非常に少なかった。EXAMPLES The present invention will be specifically described below with reference to examples. However, the present invention is not limited to this embodiment. Example 1 Using sewage as the organic wastewater to be treated, biological treatment was performed based on the biological treatment process of the present invention shown in FIG.
In this case, only part of the settled sludge from the settling tank 4 was sent to the stirring tank 10. Table 1 shows the average water quality of the sewage to be treated. The test conditions are shown in Table 2.
As a result of conducting a test for 1 year under the conditions described below, the average water quality of the treated water was 3.4 mg / liter for SS and 5 mg / liter for BOD.
The liter and COD are 9.6 mg / liter, and good treated water can be obtained. The amount of surplus biological sludge generated is 1 m 3 of sewage.
It was a very small amount of 5.8 to 6.8 g / SS.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【表２】 [Table 2]
【００１４】比較例１
図１に示す生物処理工程の攪拌槽１０を省略し、アルカ
リ添加を行わずに、生物汚泥８に対してオゾン酸化し
た。オゾン添加量は、０．１６ｇ・オゾン／リットルと
した。この結果、オゾン酸化槽流入汚泥濃度０．８３ｇ
／リットルに対して、オゾン酸化後の汚泥濃度は０．４
８ｇ／リットルであった。また、処理水の水質は、ＳＳ
が４．２ｍｇ／リットル、ＢＯＤが５ｍｇ／リットル、
ＣＯＤが１０．２ｍｇ／リットルと、実施例１と同程度
であったが、余剰汚泥発生量は下水１ｍ3 当たり１３〜
１５ｇ・ＳＳと多量であった。すなわち、本発明の実施
例１の場合に比較して約２倍のオゾン量を添加したにも
かかわらず、汚泥減量効果が約１／２であった。両者に
おいてオゾン添加量を変化させた場合の汚泥の可溶性と
ｐＨとの関係を図２に示す。これによれば、本発明によ
るｐＨを９〜１１の範囲になるようにアルカリを添加し
て処理することの有利性が良くわかる。Comparative Example 1 The biological sludge 8 in the biological treatment step shown in FIG. 1 was omitted, and the biological sludge 8 was ozone-oxidized without adding an alkali. The amount of ozone added was 0.16 g · ozone / liter. As a result, the concentration of sludge flowing into the ozone oxidation tank was 0.83 g
/ L, the sludge concentration after ozone oxidation is 0.4
It was 8 g / liter. The quality of treated water is SS
Is 4.2 mg / liter, BOD is 5 mg / liter,
The COD was 10.2 mg / liter, which was about the same as in Example 1, but the amount of excess sludge generated was 13 to 3 m 3 of sewage.
It was a large amount of 15 g · SS. That is, the sludge weight reduction effect was about ½ even though the ozone amount was doubled as compared with the case of Example 1 of the present invention. FIG. 2 shows the relationship between sludge solubility and pH when the amount of ozone added is changed in both cases. According to this, the advantage of adding an alkali so that the pH of the present invention is in the range of 9 to 11 and performing the treatment is well understood.
【００１５】[0015]
【発明の効果】本発明は、有機性汚水を生物処理する際
に生物処理工程から発生する余剰汚泥の量を大幅に減少
させることができるので、余剰汚泥の処理に要する費用
を低減することができる。また、汚泥のオゾン酸化に使
用する高価なオゾンの添加量が削減できるので、前記有
機性汚水の処理に要するランニングコストを低減させる
ことができる。INDUSTRIAL APPLICABILITY The present invention can significantly reduce the amount of surplus sludge generated from the biological treatment process when biologically treating organic wastewater, and therefore can reduce the cost required for treating excess sludge. it can. In addition, since the amount of expensive ozone used for ozone oxidation of sludge can be reduced, the running cost required for the treatment of the organic wastewater can be reduced.
【図１】本発明の生物処理方法を行う処理装置をフロー
シート的に表した概略図を示す。FIG. 1 is a schematic view showing a processing apparatus for performing a biological treatment method of the present invention in a flow sheet form.
【図２】汚泥のオゾン酸化に際して、オゾン添加量を変
化させた場合の汚泥の可溶性とｐＨとの関係を表したグ
ラフを示す。FIG. 2 is a graph showing the relationship between the solubility of sludge and the pH when the amount of ozone added is changed during ozone oxidation of sludge.
１ 生物処理槽 ２ 原水 ３ 活性汚泥スラリー ４ 沈殿槽 ５ 処理水 ６ 沈殿汚泥 ７ 返送汚泥 ８ 沈殿汚泥の一部 ９ アルカリ １０ 攪拌槽 １１ オゾン酸化槽 １２ オゾン １３ オゾン酸化汚泥 １６ 活性汚泥スラリー 1 biological treatment tank 2 Raw water 3 Activated sludge slurry 4 settling tank 5 treated water 6 Settled sludge 7 Return sludge Part of 8 settling sludge 9 alkali 10 stirring tank 11 Ozone oxidation tank 12 ozone 13 Ozone-oxidizing sludge 16 Activated sludge slurry
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 3/12 C02F 11/06 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) C02F 3/12 C02F 11/06
Claims (2)
方法において、有機性汚水を生物処理工程に導入して処
理し、前記生物処理工程からの流出液を固液分離し、そ
の固液分離による得られた分離汚泥の少なくとも一部を
前記生物処理工程に返送し、前記分離汚泥の残りの一部
をｐＨ９〜１１のアルカリ性条件下でオゾン酸化し、前
記オゾン酸化で得られたオゾン酸化汚泥を前記生物処理
工程に返送することを特徴とする有機性汚水の処理方
法。1. A treatment method for biologically treating and purifying organic sewage, wherein the organic sewage is introduced into a biological treatment step for treatment, and the effluent from the biological treatment step is subjected to solid-liquid separation, and the solid-liquid is obtained. return at least part of the separated sludge obtained by the separation in the biological treatment step, the remaining part of the separation sludge
Is treated with ozone under alkaline conditions of pH 9 to 11, and the ozone-oxidized sludge obtained by the ozone oxidation is returned to the biological treatment step.
装置において、有機性汚水を導入して処理する生物処理
装置、前記生物処理装置からの流出液を固液分離する固
液分離装置、その固液分離装置で得られた分離汚泥の少
なくとも一部を前記生物処理装置に返送するための返送
管、前記分離汚泥の残りの一部をオゾン酸化槽へ送る移
送管、又は前記生物処理装置から引き抜いた汚泥をオゾ
ン酸化槽へ送る移送管、前記分離汚泥の残りの一部をｐ
Ｈ９〜１１のアルカリ性条件下でオゾン酸化するオゾン
酸化槽、前記オゾン酸化槽からオゾン酸化汚泥を前記生
物処理装置に返送する返送管から構成されることを特徴
とする有機性汚水の処理装置。2. A treatment apparatus for biologically treating and purifying organic sewage, wherein the biological treatment apparatus introduces and treats the organic sewage, and a solid-liquid separation apparatus for solid-liquid separating the effluent from the biological treatment apparatus. A return pipe for returning at least a part of the separated sludge obtained by the solid-liquid separation device to the biological treatment device, a transfer pipe for sending the remaining part of the separated sludge to an ozone oxidation tank, or the biological treatment device transfer pipe to send the sludge withdrawn from the ozone oxidation tank, the remaining portion of the separating sludge p
An apparatus for treating organic sewage, comprising an ozone oxidation tank for ozone oxidation under alkaline conditions of H9 to 11, and a return pipe for returning ozone oxidation sludge from the ozone oxidation tank to the biological treatment apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28200995A JP3400622B2 (en) | 1995-10-30 | 1995-10-30 | Method and apparatus for treating organic sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28200995A JP3400622B2 (en) | 1995-10-30 | 1995-10-30 | Method and apparatus for treating organic sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09122678A JPH09122678A (en) | 1997-05-13 |
| JP3400622B2 true JP3400622B2 (en) | 2003-04-28 |
Family
ID=17646962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28200995A Expired - Fee Related JP3400622B2 (en) | 1995-10-30 | 1995-10-30 | Method and apparatus for treating organic sewage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3400622B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3763439B2 (en) * | 1997-05-30 | 2006-04-05 | 三菱電機株式会社 | Waste water ozone treatment method and ozone treatment apparatus |
| FR2766813B1 (en) * | 1997-08-01 | 1999-10-01 | Degremont | PROCESS AND DEVICE FOR WASTEWATER TREATMENT INCLUDING ADDITIONAL TREATMENT OF SLUDGE BY OZONATION |
| JP6977993B2 (en) * | 2016-10-26 | 2021-12-08 | 西日本高速道路株式会社 | Organic wastewater treatment method and treatment equipment |
-
1995
- 1995-10-30 JP JP28200995A patent/JP3400622B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09122678A (en) | 1997-05-13 |
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