JPH10491A - Method and apparatus for biological dephosphorization treatment of organic sewage - Google Patents
Method and apparatus for biological dephosphorization treatment of organic sewageInfo
- Publication number
- JPH10491A JPH10491A JP15839996A JP15839996A JPH10491A JP H10491 A JPH10491 A JP H10491A JP 15839996 A JP15839996 A JP 15839996A JP 15839996 A JP15839996 A JP 15839996A JP H10491 A JPH10491 A JP H10491A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- tank
- aeration
- biological dephosphorization
- aerated
- 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
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000010865 sewage Substances 0.000 title claims description 8
- 239000010802 sludge Substances 0.000 claims abstract description 87
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 49
- 239000011574 phosphorus Substances 0.000 claims abstract description 49
- 238000005273 aeration Methods 0.000 claims abstract description 41
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000003647 oxidation Effects 0.000 claims abstract description 18
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims description 16
- 239000007787 solid Substances 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract 5
- 238000005276 aerator Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 description 2
- 235000011010 calcium phosphates Nutrition 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- -1 calcium phosphate compound Chemical class 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910000398 iron phosphate Inorganic materials 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 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
- Y02W10/20—Sludge processing
Landscapes
- Treatment Of Sludge (AREA)
- Removal Of Specific Substances (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、下水などのリン含
有汚水を高度に浄化する有機性汚水の生物学的脱リン方
法及び脱リン装置に関し、特に、余剰汚泥発生量を無く
すことができ、かつリンを資源回収できる有機性汚水の
生物学的脱リン処理方法及び脱リン処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for biologically removing phosphorus from organic sewage for purifying phosphorus-containing wastewater such as sewage at a high level. The present invention relates to a method and apparatus for biologically removing phosphorus from organic wastewater capable of recovering phosphorus as a resource.
【０００２】[0002]
【従来の技術】従来より、下水などの汚水のリンを除去
する方法として種々な方法が提案され、利用されてい
る。この汚水のリンを除去する方法として、最も代表的
な技術は生物学的脱リン法である。この生物学的脱リン
の技術は、有機性汚水を嫌気槽に供給して、返送汚泥中
の活性汚泥（脱リン菌が共存している）からリンを吐き
出させる。その後、活性汚泥を好気槽（曝気槽）に流入
させて、脱リン菌にリン摂取を行なわせた後、活性汚泥
を沈殿分離し、沈殿汚泥を嫌気槽にリサイクルするもの
である。2. Description of the Related Art Conventionally, various methods have been proposed and used as a method for removing phosphorus in wastewater such as sewage. The most typical technique for removing phosphorus in wastewater is a biological dephosphorization method. In this biological dephosphorization technique, organic sewage is supplied to an anaerobic tank to discharge phosphorus from activated sludge (in which dephosphorylated bacteria coexist) in returned sludge. Thereafter, the activated sludge is allowed to flow into an aerobic tank (aeration tank) to allow the dephosphorus bacteria to take in phosphorus, and then the activated sludge is separated by settling, and the settled sludge is recycled to an anaerobic tank.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の生物学
的脱リン法は下記するような欠点があった。すなわち、
従来においては、リンは活性汚泥に取り込まれる以外の
形では除去されないので、リンを取り込んだ汚泥を余剰
汚泥として積極的に系外に排出しない限り、リンの物質
収支が成立せず高度のリン除去率が得られない。したが
って、余剰汚泥発生量を減少させる何らかの処置を取る
と、必然的に処理水のリン濃度が高くなってしまう。こ
のため、従来の生物学的脱リン法は原理的に余剰汚泥発
生量を減少させることはできず、この余剰汚泥処理が大
きな負担になると言う宿命的な問題を抱えていた。However, the conventional biological dephosphorization method has the following disadvantages. That is,
Conventionally, phosphorus is not removed except in the form of being taken up by activated sludge, so unless the sludge that has taken up phosphorus is actively discharged out of the system as excess sludge, the material balance of phosphorus is not established and advanced phosphorus removal is performed. No rate is obtained. Therefore, if any measure is taken to reduce the amount of excess sludge generated, the concentration of phosphorus in the treated water will inevitably increase. For this reason, the conventional biological dephosphorization method cannot reduce the amount of excess sludge generated in principle, and has a fatal problem that the treatment of the excess sludge imposes a heavy burden.
【０００４】本発明は、上記問題点に鑑みてなされたも
のであり、その目的とするところは、生物学的脱リン法
の余剰汚泥発生量をゼロにでき、かつリン除去率が悪化
しないという矛盾する要求を満足でき、又さらに汚水中
のリンを資源として回収可能な有機性汚水の生物学的脱
リン処理方法及び脱リン処理装置を提供することにあ
る。[0004] The present invention has been made in view of the above problems, and an object of the present invention is to reduce the amount of excess sludge generated by the biological dephosphorization method and to prevent the phosphorus removal rate from deteriorating. An object of the present invention is to provide a biological phosphorus removal treatment method and a phosphorus removal treatment apparatus for organic wastewater which can satisfy the contradictory requirements and can further recover phosphorus in the wastewater as a resource.
【０００５】[0005]
【課題を解決するための手段】本発明者は、生物学的脱
リン法のプロセス構成を変革して、生物学的なリンの摂
取、化学的リン除去、オゾンによる汚泥の酸化を新規な
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。SUMMARY OF THE INVENTION The present inventor has changed the process configuration of the biological dephosphorization method so that biological phosphorus uptake, chemical phosphorus removal, and oxidation of sludge by ozone are performed in a novel mode. It has been found that the above-mentioned problems can be solved by combining the above.
【０００６】すなわち本発明の上記目的は、有機性汚水
を嫌気・好気生物学的脱リン法により生物学的に浄化す
る生物学的脱リン処理方法において、前記嫌気・好気生
物学的脱リン法を用いた生物脱リン工程から発生する余
剰活性汚泥を、該生物学的脱リン工程の処理とは別の曝
気処理手段で曝気し、該曝気処理手段にて曝気した曝気
汚泥の一部をオゾン酸化処理して再び該曝気処理手段に
供給するとともに、該曝気処理手段の汚泥を固液分離
し、また分離水中のリンを化学的手段により除去するこ
とを特徴とする有機性汚水の生物学的脱リン処理方法に
より達成することがきる。That is, the object of the present invention is to provide a biological phosphorus removal treatment method for biologically purifying organic wastewater by an anaerobic / aerobic biological phosphorus removal method. Excess activated sludge generated from the biological dephosphorization step using the phosphorus method is aerated by aeration means different from the biological dephosphorization step, and a part of the aerated sludge aerated by the aeration treatment means The organic wastewater by subjecting the wastewater to ozone oxidation treatment and supplying it to the aeration treatment means again, separating sludge from the aeration treatment means into solid and liquid, and removing phosphorus in the separated water by chemical means. Can be achieved by a chemical dephosphorization method.
【０００７】本発明の上記目的は、有機性汚水を嫌気好
気生物学的脱リン法により生物学的に浄化する生物学的
脱リン処理装置であって、前記嫌気・好気生物学的脱リ
ン法を用いた生物脱リン工程から発生する余剰活性汚泥
を曝気し、該生物学的脱リン工程の処理とは別に設けら
れた曝気槽と、前記曝気槽にて曝気した曝気汚泥の一部
を、オゾン酸化して再び該曝気槽に供給するオゾン酸化
槽と、前記曝気槽から流出した汚泥を固液分離する固液
分離手段と、分離水中のリンを化学的に除去する手段と
を備えてなることを特徴とする有機性汚水の生物学的脱
リン処理装置により達成することができる。An object of the present invention is to provide a biological dephosphorization treatment apparatus for biologically purifying organic wastewater by an anaerobic aerobic biological dephosphorization method. Aeration of excess activated sludge generated from the biological dephosphorization step using the phosphorus method, an aeration tank provided separately from the biological dephosphorization step, and a part of the aerated sludge aerated in the aeration tank With an ozone oxidation tank for oxidizing and supplying the sludge to the aeration tank again, solid-liquid separation means for solid-liquid separation of sludge flowing out of the aeration tank, and means for chemically removing phosphorus in the separated water. This can be achieved by a biological dephosphorization treatment apparatus for organic sewage characterized by comprising:
【０００８】[0008]
【発明の実施の形態】以下、本発明の好ましい実施形態
について、処理装置の概略を示した図１を参照して詳細
に説明する。図１において、この処理装置１は、有機性
汚水である原水２を嫌気・好気生物学的脱リン法により
生物学的に浄化する生物学的脱リン工程３を経て処理水
２Ａを排出する処理装置１である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to FIG. In FIG. 1, this treatment apparatus 1 discharges treated water 2A through a biological dephosphorization step 3 for biologically purifying raw water 2, which is organic wastewater, by an anaerobic / aerobic biological phosphorus removal method. Processing device 1.
【０００９】そして、その特徴的構成は、前記嫌気・好
気生物学的脱リン法を用いた生物学的脱リン工程３から
発生する余剰活性汚泥１１を曝気し、該生物学的脱リン
工程３の処理とは別に設けられた曝気槽５を有し、ま
た、前記曝気槽５にて曝気した曝気汚泥の一部を、例え
ば沈殿槽８を介してオゾン酸化槽７に送り、このオゾン
酸化槽７にてオゾン酸化して再び曝気槽５に供給する汚
泥の移送経路を有し、さらに、曝気槽５から流出した汚
泥を固液分離する沈殿槽６等の固液分離手段を有した構
造である。[0009] The characteristic structure is that excess activated sludge 11 generated from the biological dephosphorization step 3 using the anaerobic / aerobic biological dephosphorization method is aerated, and the biological dephosphorization step is performed. 3 and a part of the aerated sludge aerated in the aeration tank 5 is sent to an ozone oxidation tank 7 via a sedimentation tank 8, for example. A structure having a transfer route for sludge which is oxidized with ozone in the tank 7 and supplied to the aeration tank 5 again, and further provided with a solid-liquid separation means such as a settling tank 6 for separating the sludge flowing out of the aeration tank 5 into solid and liquid. It is.
【００１０】沈殿槽４を流出した汚泥は、返送路３０、
３１を介して嫌気部３Ａに直接返送される返送汚泥２０
と、返送路４０を介して汚泥消滅工程１０に回される余
剰活性汚泥１１とに別れる。この余剰汚泥１１を分解す
る汚泥消滅工程１０においては、各返送路５０、５１、
５２、５３、４１を介して、曝気槽５、オゾン酸化槽
７、沈殿槽８の間において汚泥の循環が適宜行われる。
なお、この返送路系は、例えば適宜配管により構成され
ている。また、沈殿槽８から返送路４２を介して流出し
た汚泥は、沈殿槽６により回収リン９を回収され、返送
路４３を経て嫌気部３Ａに返送される。The sludge flowing out of the sedimentation tank 4 is returned to the return path 30,
Return sludge 20 returned directly to the anaerobic section 3A via 31
And the excess activated sludge 11 which is sent to the sludge annihilation step 10 via the return path 40. In the sludge elimination process 10 for decomposing the excess sludge 11, each return path 50, 51,
The circulation of the sludge is appropriately performed between the aeration tank 5, the ozone oxidation tank 7, and the settling tank 8 via 52, 53, 41.
This return path system is constituted by, for example, appropriate piping. The sludge flowing out of the sedimentation tank 8 via the return path 42 is collected by the settling tank 6 to recover phosphorus 9 and returned to the anaerobic section 3A via the return path 43.
【００１１】以下、処理装置の作用について、図を参照
しつつ説明する。図１に示すように、生物学的脱リン工
程３の嫌気槽３Ａに原水２と返送汚泥２０を流入させ
て、脱リン菌からリンを吐き出させた後、好気槽３Ｂに
流入させＢＯＤ除去と脱リン菌へのリン吸収をおこなわ
せる。沈殿槽４で沈殿した汚泥の大部分は返送汚泥２０
として嫌気槽３Ａにリサイクルされる。The operation of the processing apparatus will be described below with reference to the drawings. As shown in FIG. 1, the raw water 2 and the return sludge 20 flow into the anaerobic tank 3A in the biological dephosphorization step 3 to discharge phosphorus from the dephosphorus bacteria, and then flow into the aerobic tank 3B to remove BOD. And phosphorus absorption to dephosphorus bacteria. Most of the sludge settled in the settling tank 4 is returned sludge 20
Is recycled to the anaerobic tank 3A.
【００１２】沈殿汚泥の他部は、上記したように生物学
的脱リン工程３からの余剰汚泥１１である。このリンを
豊富に含む余剰汚泥１１を次に記すような「汚泥消滅工
程１０」に導入する。すなわち、先ず、生物学的脱リン
工程３からの余剰汚泥１１をオゾン酸化槽７に導き、汚
泥をオゾンにより酸化分解し可溶化し、可溶性有機物
（ＢＯＤ）およびリン酸イオンを汚泥から溶出させる。The other part of the settled sludge is the excess sludge 11 from the biological dephosphorization step 3 as described above. The excess sludge 11 rich in phosphorus is introduced into a “sludge elimination step 10” as described below. That is, first, the excess sludge 11 from the biological dephosphorization step 3 is guided to the ozone oxidation tank 7, where the sludge is oxidized and decomposed with ozone to be solubilized, and soluble organic substances (BOD) and phosphate ions are eluted from the sludge.
【００１３】次に、オゾン酸化された汚泥を生物学的脱
リン工程３の曝気槽４とは別の曝気槽４に導き、オゾン
酸化汚泥（微生物による生分解性が向上している）を微
生物によって炭酸ガスと水に分解する。生物学的脱リン
工程３の余剰汚泥１１の引き抜き場所として、生物学的
脱リン工程３の好気槽３Ｂから直接汚泥を引き抜いて汚
泥消滅工程１０に供給しても同じ効果が得られる。Next, the ozone-oxidized sludge is led to an aeration tank 4 different from the aeration tank 4 in the biological dephosphorization step 3 to convert the ozone-oxidized sludge (biodegradability by microorganisms) into microorganisms. Decomposes into carbon dioxide and water. The same effect can be obtained by directly extracting the sludge from the aerobic tank 3B in the biological dephosphorization step 3 and supplying the sludge to the sludge elimination step 10 as a place for extracting the excess sludge 11 in the biological dephosphorization step 3.
【００１４】曝気槽５から流出する汚泥を沈殿槽８で固
液分離し、沈殿汚泥をオゾン酸化槽７に供給しオゾン酸
化する。すなわち汚泥が曝気槽とオゾン酸化槽を循環す
る。この結果、汚泥はオゾン酸化と生物代謝の作用によ
って炭酸ガス、水に分解されて消滅し、系外に汚泥を廃
棄する必要がなくなる。なお、生物学的脱リン工程３の
余剰汚泥１１を、返送路４１を介して初めに曝気槽５に
流入させた後、オゾン酸化槽７に循環しても同じ効果が
得られる。The sludge flowing out of the aeration tank 5 is subjected to solid-liquid separation in a settling tank 8, and the settled sludge is supplied to an ozone oxidation tank 7 for ozone oxidation. That is, the sludge circulates in the aeration tank and the ozone oxidation tank. As a result, the sludge is decomposed into carbon dioxide and water by the action of ozone oxidation and biological metabolism and disappears, and there is no need to dispose of the sludge outside the system. The same effect can be obtained by first flowing the excess sludge 11 from the biological dephosphorization step 3 into the aeration tank 5 through the return path 41, and then circulating the sludge to the ozone oxidation tank 7.
【００１５】次に、沈殿槽８からの分離水にカルシウ
ム、アルミニウム、鉄などのリンと化学的に沈殿生成反
応を起こす金属イオンを添加し、リンをヒドロキシアパ
タイトなどのリン酸カルシウム化合物、リン酸アルミニ
ウム、リン酸鉄として分離回収する。中でもカルシウム
イオンはリンをリン酸カルシウム肥料として回収できる
ので最適である。またリンの化学的除去手段として晶析
脱リン法、吸着脱リン法を適用してもよい。Next, to the separated water from the sedimentation tank 8, a metal ion such as calcium, aluminum or iron which causes a chemical precipitation reaction with phosphorus is added, and the phosphorus is converted to a calcium phosphate compound such as hydroxyapatite, aluminum phosphate, or the like. Separate and collect as iron phosphate. Among them, calcium ions are most suitable because phosphorus can be recovered as a calcium phosphate fertilizer. Further, as a means for chemically removing phosphorus, a crystallization dephosphorization method or an adsorption dephosphorization method may be applied.
【００１６】他の実施の形態としては、生物脱リン工程
の嫌気槽の後の好気槽の代わりに脱窒素槽、硝化槽を設
け、生物脱リンと生物脱窒素を同時に行なうことも当然
可能である。In another embodiment, it is naturally possible to provide a denitrification tank and a nitrification tank instead of the aerobic tank after the anaerobic tank in the biological dephosphorization step, and to simultaneously perform the biological dephosphorization and the biological denitrification. It is.
【００１７】このように本発明は、従来において、「生
物学的脱リン法において余剰汚泥生物量をゼロにするこ
とはリンの物質収支的に不可能である」との固定観念を
初めて打破したものであり、極めて有用な効果を奏する
ものである。As described above, the present invention for the first time breaks the stereotype that "it is impossible to reduce the amount of excess sludge biomass to zero in the biological dephosphorization method in terms of the material balance of phosphorus". This is a very useful effect.
【００１８】[0018]
【実施例】以下、本発明の実施例により、その効果をよ
り明らかにすることができる。 〔実施例〕本実施例は、図１の工程にしたがって下水
（平均水質を表１に示す）を原水として、本発明の実証
試験を行なった。表２に試験条件を示す。EXAMPLES The effects of the present invention can be further clarified by the examples of the present invention. Example In this example, a verification test of the present invention was performed using sewage (average water quality is shown in Table 1) as raw water according to the process of FIG. Table 2 shows the test conditions.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】実験の結果、処理開始後２カ月後に処理状
況が安定状態になってからの沈殿槽からの処理水水質の
平均は表３のように高度にリン、ＢＯＤが除去されてい
た。また余剰汚泥は１年間の試験の間、引き抜かなかっ
たが、生物脱リン工程の好気槽のＭＬＳＳは３６００〜
４０００ｍｇ／リットルを維持し、また汚泥消滅工程の
曝気槽のＭＬＳＳも運転開始当初に設定した４５００〜
５０００ｍｇ／リットルを維持したことから本発明シス
テムの系外に廃棄する余剰汚泥の発生は無かったことが
判明した。As a result of the experiment, the average of the quality of the treated water from the sedimentation tank after the treatment state became stable two months after the start of the treatment was as shown in Table 3, and phosphorus and BOD were highly removed. Excess sludge was not extracted during the one-year test, but the MLSS of the aerobic tank in the biological dephosphorization process was 3600-
Maintain 4000 mg / liter, and also set the MLSS of the aeration tank in the sludge annihilation process to 4500 set at the beginning of operation.
Since it was maintained at 5000 mg / liter, it was found that there was no generation of excess sludge to be discarded outside the system of the present invention.
【００２２】[0022]
【表３】 [Table 3]
【００２３】〔比較例〕前記実施例において、汚泥消滅
工程１０とリン除去工程６を省略した以外は同一条件で
試験したところ処理水２Ａの処理水質は本発明の実施例
と同じであったが、汚泥発生量が原水１ｍ3 あたり６ｋ
ｇ−ｓｓと多量であり、汚泥削減効果が認められなかっ
た。[Comparative Example] In the above example, the test was conducted under the same conditions except that the sludge elimination step 10 and the phosphorus removing step 6 were omitted. The treated water quality of the treated water 2A was the same as that of the example of the present invention. , sludge generation amount 6k per raw water 1m 3
g-ss, a large amount, and no sludge reduction effect was observed.
【００２４】[0024]
【発明の効果】以上述べたように、本発明は、嫌気・好
気生物学的脱リン法を用いた生物脱リン工程から発生す
る余剰活性汚泥を、該生物脱リン工程の処理とは別の曝
気処理手段で曝気し、該曝気処理手段にて曝気した曝気
汚泥の一部をオゾン酸化処理して再び該曝気処理手段に
供給するとともに、該曝気処理手段の汚泥を固液分離
し、また分離水中のリンを化学的手段により除去するこ
とを特徴とする有機性汚水の生物学的脱リン処理方法並
びに処理装置である。As described above, according to the present invention, the excess activated sludge generated from the biological dephosphorization step using the anaerobic / aerobic biological dephosphorization method is separated from the treatment in the biological dephosphorization step. Aeration by means of the aeration treatment means, a part of the aerated sludge aerated by the aeration treatment means is subjected to ozone oxidation treatment and supplied to the aeration treatment means again, and the sludge of the aeration treatment means is separated into a solid and a liquid. A biological phosphorus removal treatment method and apparatus for organic wastewater, wherein phosphorus in separated water is removed by chemical means.
【００２５】したがって、本発明によれば、オゾンによ
る汚泥可溶化法、生物学的脱リン法と化学的なリン除去
法を新規な思想で結合した結果、余剰汚泥の発生量をゼ
ロにでき、かつ高度のリン除去が安定して行なわれる。
さらにまた、余剰汚泥の発生量をゼロにできるだけでな
く、脱リン菌に摂取されたリンをヒドロキシアパタイト
などの肥料資源として回収でき。極めて有用な効果を奏
することができる。Therefore, according to the present invention, as a result of combining the method of solubilizing sludge with ozone, the method of biological phosphorus removal and the method of chemical phosphorus removal by a novel concept, the amount of excess sludge generated can be reduced to zero. In addition, a high degree of phosphorus removal is stably performed.
Furthermore, not only the amount of excess sludge generated can be reduced to zero, but also the phosphorus taken in by the dephosphorization bacteria can be recovered as fertilizer resources such as hydroxyapatite. An extremely useful effect can be achieved.
【図１】本発明の処理装置の概略構成を示した図であ
る。FIG. 1 is a diagram showing a schematic configuration of a processing apparatus of the present invention.
１ 処理装置 ２Ａ 処理水 ２ 原水 ３ 生物学的脱リン工程 ３Ａ 嫌気部 ３Ｂ 好気部 ４、６、８ 沈殿槽 ５ 曝気槽 ７ オゾン酸化槽 ９ 回収リン １０ 汚泥消滅工程 １１ 余剰汚泥 ２０ 返送汚泥 ３０、３１、４０、４１、４２、４３、５０、５１、５
３ 返送系Reference Signs List 1 treatment apparatus 2A treated water 2 raw water 3 biological dephosphorization step 3A anaerobic part 3B aerobic part 4, 6, 8 sedimentation tank 5 aeration tank 7 ozone oxidation tank 9 collected phosphorus 10 sludge annihilation step 11 excess sludge 20 return sludge 30 , 31, 40, 41, 42, 43, 50, 51, 5
3 Return system
Claims (2)
法により生物学的に浄化する生物学的脱リン処理方法に
おいて、 前記嫌気・好気生物学的脱リン法を用いた生物脱リン工
程から発生する余剰活性汚泥を、該生物学的脱リン工程
の処理とは別の曝気処理手段で曝気し、該曝気処理手段
にて曝気した曝気汚泥の一部をオゾン酸化処理して再び
該曝気処理手段に供給するとともに、該曝気処理手段の
汚泥を固液分離し、また分離水中のリンを化学的手段に
より除去することを特徴とする有機性汚水の生物学的脱
リン処理方法。1. A biological dephosphorization treatment method for biologically purifying organic sewage by an anaerobic / aerobic biological dephosphorization method, wherein the organism using the anaerobic / aerobic biological dephosphorization method is used. Excess activated sludge generated from the dephosphorization step is aerated by aeration means different from the biological dephosphorization step, and a part of the aerated sludge aerated by the aeration treatment means is subjected to ozone oxidation treatment. A method for biologically removing phosphorus from organic wastewater, wherein the wastewater is supplied again to the aeration treatment means, and the sludge from the aeration treatment means is solid-liquid separated, and phosphorus in the separated water is removed by chemical means. .
により生物学的に浄化する生物学的脱リン処理装置であ
って、 前記嫌気・好気生物学的脱リン法を用いた生物脱リン工
程から発生する余剰活性汚泥を曝気し、該生物学的脱リ
ン工程の処理とは別に設けられた曝気槽と、 前記曝気槽にて曝気した曝気汚泥の一部を、オゾン酸化
して再び該曝気槽に供給するオゾン酸化槽と、 前記曝気槽から流出した汚泥を固液分離する固液分離手
段と、 分離水中のリンを化学的に除去する手段とを備えてなる
ことを特徴とする有機性汚水の生物学的脱リン処理装
置。2. A biological dephosphorization treatment apparatus for biologically purifying organic wastewater by an anaerobic aerobic biological dephosphorization method, wherein the anaerobic / aerobic biological dephosphorization method is used. Excess activated sludge generated from the biological dephosphorization step is aerated, an aeration tank provided separately from the biological dephosphorization step, and a part of the aerated sludge aerated in the aeration tank is subjected to ozone oxidation. And an ozone oxidation tank for supplying the sludge to the aeration tank again, solid-liquid separation means for solid-liquid separation of sludge flowing out of the aeration tank, and means for chemically removing phosphorus in the separated water. Biological dephosphorization equipment for organic wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15839996A JP3449855B2 (en) | 1996-06-19 | 1996-06-19 | Biological phosphorus removal method and apparatus for organic wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15839996A JP3449855B2 (en) | 1996-06-19 | 1996-06-19 | Biological phosphorus removal method and apparatus for organic wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10491A true JPH10491A (en) | 1998-01-06 |
| JP3449855B2 JP3449855B2 (en) | 2003-09-22 |
Family
ID=15670901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15839996A Expired - Lifetime JP3449855B2 (en) | 1996-06-19 | 1996-06-19 | Biological phosphorus removal method and apparatus for organic wastewater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3449855B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000263093A (en) * | 1999-03-15 | 2000-09-26 | Maezawa Ind Inc | Wastewater treatment equipment |
| JP2001225090A (en) * | 2000-02-17 | 2001-08-21 | Kurita Water Ind Ltd | Organic wastewater treatment method and apparatus |
| CN100418908C (en) * | 2006-10-30 | 2008-09-17 | 江明辉 | Sewage deep treatment method and device without sludge discharge |
-
1996
- 1996-06-19 JP JP15839996A patent/JP3449855B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000263093A (en) * | 1999-03-15 | 2000-09-26 | Maezawa Ind Inc | Wastewater treatment equipment |
| JP2001225090A (en) * | 2000-02-17 | 2001-08-21 | Kurita Water Ind Ltd | Organic wastewater treatment method and apparatus |
| CN100418908C (en) * | 2006-10-30 | 2008-09-17 | 江明辉 | Sewage deep treatment method and device without sludge discharge |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3449855B2 (en) | 2003-09-22 |
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