JP2007000734A - Method for treating organic waste water, and system therefor - Google Patents

Method for treating organic waste water, and system therefor Download PDF

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JP2007000734A
JP2007000734A JP2005181880A JP2005181880A JP2007000734A JP 2007000734 A JP2007000734 A JP 2007000734A JP 2005181880 A JP2005181880 A JP 2005181880A JP 2005181880 A JP2005181880 A JP 2005181880A JP 2007000734 A JP2007000734 A JP 2007000734A
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organic wastewater
sludge
dehydration
dewatering
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Hiroshi Mizutani
洋 水谷
Katsumi Cho
克美 長
Takehiro Kato
雄大 加藤
Hiroshi Shirane
寛 白根
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Mitsubishi Heavy Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for treating organic waste water by which existing equipment can be utilized, sludge dehydration properties in a pre-treatment stage or a post-treatment stage can be improved with a simple configuration, and the resource recovery ratio of whole waste can be enhanced, and also to provide a system therefor. <P>SOLUTION: Human waste 40 and septic tank sludge 46 are subjected to pretreatment, respectively, thereafter, the human waste and septic tank sludge are mixed, and the mixture is subjected to biological treatment in a biological denitrification device 30. A biological treated liquid 52 from the biological treatment is subjected to solid-liquid separation and flocculation separation. The obtained sludge 54 is subjected to dehydration treatment in a sludge dehydration device 34, and the dehydrated sludge is made to flow into a secondary dehydration device 35 of subjecting the dehydrated sludge to secondary dehydration by pressing. Suitably, the secondary dehydration device 35 is provided with a fibrous substance feeding means, and a fibrous substance 60 is externally added. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、浄化槽汚泥、し尿等の有機性廃水を生物処理する技術に関し、特に、系内より発生する汚泥の脱水性向上を図った有機性廃水の処理方法及び該システムに関する。   The present invention relates to a technique for biologically treating organic wastewater such as septic tank sludge and human waste, and more particularly to a method for treating organic wastewater and the system for improving the dewaterability of sludge generated from the system.

従来、し尿処理施設等の有機性廃水処理施設においては生物処理が主体的に用いられているが、これにより多量の汚泥が発生し、処理に係わるコストが嵩むため、この汚泥の処理が重要な課題とされている。
一般的な有機性廃水の処理は、図9(特許文献1等参照)に示すように、まず、夾雑物除去装置71にて、受け入れられた有機性廃水から夾雑物を除去した後、該夾雑物を除去した廃水を生物学的脱窒素装置73に供給する。このとき、生物学的脱窒素装置73に廃水を供給する前段に前処理脱水装置を設け、有機性廃水を前処理脱水した後、脱水分離液を前記生物学的脱窒素装置に供給する場合もある。前記夾雑物除去装置71にて捕集された夾雑物は、夾雑物脱水装置72にて脱水された後に脱水し渣として処理される。また、前記生物学的脱窒素装置73では、廃水中の主にBOD、T−N(全窒素)などを除去する。生物学的脱窒素装置73から排出される生物処理液は、固液分離装置74及び凝集分離装置75などにより固液分離し、固液分離液は高度処理設備76にて活性炭処理等により高度処理を施した後に系外排出される。一方、前記固液分離により得られた分離汚泥は、遠心分離機、ベルトプレスなどの後処理脱水装置77にて脱水された後に、必要に応じて汚泥処理設備78にて処理される。
Conventionally, biological treatment is mainly used in organic wastewater treatment facilities such as human waste treatment facilities, but this generates a large amount of sludge and increases the costs associated with the treatment. It is an issue.
As shown in FIG. 9 (see Patent Document 1, etc.), the general organic wastewater treatment is performed by first removing contaminants from the accepted organic wastewater by the contaminant removal device 71 and then removing the contaminants. The waste water from which the substances have been removed is supplied to the biological denitrification apparatus 73. At this time, a pretreatment dewatering device may be provided in the previous stage for supplying wastewater to the biological denitrification device 73, and the organic wastewater may be pretreated and dehydrated, and then the dehydrated separation liquid may be supplied to the biological denitrification device. is there. The foreign matter collected by the foreign matter removing device 71 is dehydrated by the foreign matter dehydrating device 72 and then dehydrated and processed as a residue. Further, the biological denitrification apparatus 73 mainly removes BOD, TN (total nitrogen) and the like in the wastewater. The biological treatment liquid discharged from the biological denitrification apparatus 73 is subjected to solid-liquid separation by the solid-liquid separation apparatus 74 and the coagulation separation apparatus 75, and the solid-liquid separation liquid is subjected to advanced treatment by activated carbon treatment or the like in the advanced treatment facility 76. It is discharged out of the system after applying. On the other hand, the separated sludge obtained by the solid-liquid separation is dehydrated by a post-treatment dewatering device 77 such as a centrifugal separator or a belt press, and then treated by a sludge treatment facility 78 as necessary.

このような脱水装置を備えた処理システムでは、前処理脱水若しくは後処理脱水により得られた脱水汚泥は、汚泥処理設備にてメタン発酵、脱水、堆肥化、乾燥、焼却、若しくはこれらを組み合わせた設備により処理されていた。
近年、廃棄物全体の資源化率向上と効率的処理に鑑み、脱水設備において、汚泥の含水率を70%以下となるように脱水し、この脱水汚泥を燃料としてごみ焼却施設等に搬入されるケースがある。このように、脱水汚泥を燃料として利用可能な形態とすることは、資源化に際して非常に有益な方法である。
In a treatment system equipped with such a dewatering device, dewatered sludge obtained by pretreatment dewatering or posttreatment dewatering is equipment that combines methane fermentation, dewatering, composting, drying, incineration, or a combination of these in a sludge treatment facility. Had been processed by.
In recent years, in view of improving the recycling rate and efficient treatment of waste as a whole, dewatering is performed in a dewatering facility so that the moisture content of sludge is 70% or less, and this dewatered sludge is transported to a garbage incineration facility or the like as fuel. There is a case. Thus, making the dewatered sludge into a form that can be used as a fuel is a very useful method for resource recycling.

脱水性を向上させるためには、脱水処理対象に繊維状物質を含有させた状態で脱水処理を行うことが有効であることが知られている。これは、有機性廃水に元来含まれている有機性の夾雑物でも可能であるが、夾雑物が多量に含まれた有機性廃水は、ポンプの詰まりや後段生物処理の効率低下の原因となるため、従来は前処理にて夾雑物除去を行わざるを得ず、脱水の前段で繊維状物質である夾雑物を殆ど除去するため、脱水性を高く維持することは困難であった。
そこで、特許文献2(特開2002−219500号公報)では、有機性汚泥に合成繊維と凝集剤を添加して凝集させた後、脱水処理する方法を提案しており、外部添加する合成繊維により脱水性を向上させることを可能としている。
In order to improve the dehydration property, it is known that it is effective to perform a dehydration treatment in a state where a fibrous substance is contained in a dehydration treatment target. This is possible even with organic contaminants originally contained in organic wastewater, but organic wastewater containing a large amount of contaminants may cause clogging of the pump and decrease in the efficiency of biological treatment in the latter stage. Therefore, conventionally, impurities must be removed by pretreatment, and most of the impurities, which are fibrous substances, are removed before the dehydration. Therefore, it has been difficult to maintain high dewaterability.
Therefore, Patent Document 2 (Japanese Patent Application Laid-Open No. 2002-219500) proposes a method of adding a synthetic fiber and a flocculant to organic sludge to agglomerate, and then dehydrating the synthetic sludge. This makes it possible to improve dehydration.

特許第3368938号公報Japanese Patent No. 33688938 特開2002−219500号公報JP 2002-219500 A

上記したように、近年廃棄物全体の資源化率を向上させることが要望されているが、し尿等の有機性廃水処理において、汚泥を助燃剤として利用するためには、脱水汚泥の含水率を一般的に70%以下にする必要がある。しかし、従来型の脱水装置(遠心分離機・ベルトプレス等)では通常、汚泥の含水率は80〜85%程度であり70%以下にすることが困難である。このため、脱水汚泥の焼却に当たっては、重油や灯油などの補助燃料による追い炊きが必要となっていた。
また、フィルタープレスや汚泥脱水用スクリュープレス等の特殊な脱水装置を用いることにより、汚泥の含水率を低減することが可能である。しかし、このような特殊な脱水装置を採用した場合、設備が大掛かりとなり、運転動力が嵩むといった問題がある。
さらに、特許文献2に記載されるように、PETなどの廃プラスチックを繊維状に加工して、脱水設備に供給することで汚泥含水率70%を達成する方法もあるが、この方法では脱水汚泥中に廃プラスチックが残留する。この場合、脱水汚泥を固形燃料として焼却設備に供給する場合は問題にならないが、脱水汚泥を堆肥化する場合には、堆肥化設備において廃プラスチックは分解できず、製造した堆肥に残留してしまうという問題があった。
従って、本発明は上記従来技術の問題点に鑑み、既存の設備が利用でき、簡単な構成で以って前処理過程若しくは後処理過程における汚泥脱水性の向上が可能であり、さらには廃棄物全体の資源化率を向上させることができる有機性廃水の処理方法及び該システムを提供することを目的とする。
As mentioned above, in recent years, there has been a demand for improving the resource recycling rate of waste as a whole. However, in order to use sludge as a combusting agent in the treatment of organic wastewater such as human waste, the moisture content of dehydrated sludge must be increased. Generally, it is necessary to make it 70% or less. However, in conventional dehydrators (centrifuges, belt presses, etc.), the water content of sludge is usually about 80 to 85%, and it is difficult to make it 70% or less. For this reason, incineration of dewatered sludge requires additional cooking with auxiliary fuel such as heavy oil or kerosene.
Moreover, it is possible to reduce the moisture content of sludge by using a special dehydrating device such as a filter press or a sludge dewatering screw press. However, when such a special dehydrating apparatus is employed, there is a problem that the facility becomes large and the driving power increases.
Furthermore, as described in Patent Document 2, there is also a method for achieving a sludge moisture content of 70% by processing waste plastic such as PET into a fiber and supplying it to a dehydration facility. Waste plastic remains inside. In this case, there is no problem when dehydrated sludge is supplied to the incineration facility as a solid fuel, but when dehydrated sludge is composted, the waste plastic cannot be decomposed in the composting facility and remains in the manufactured compost. There was a problem.
Therefore, in view of the above-mentioned problems of the prior art, the present invention can use existing equipment, and can improve the sludge dewaterability in the pretreatment process or the posttreatment process with a simple configuration, and further, waste An object of the present invention is to provide an organic wastewater treatment method and system capable of improving the overall resource recovery rate.

そこで、本発明はかかる課題を解決するために、有機性廃水を生物処理して得られた生物処理汚泥を後処理脱水する有機性廃水の処理方法において、
前記後処理脱水にて発生した脱水汚泥を圧搾により二次脱水することを特徴とする。
また、別の発明として、有機性廃水を生物処理の前段にて前処理脱水した後に脱水分離液を生物処理する有機性廃水の処理方法において、
前記前処理脱水にて発生した脱水汚泥を圧搾により二次脱水することを特徴とする。
ここで、前記後処理脱水は、前記生物処理後の生物処理液を固液分離若しくは凝集分離等により濃縮して得られた汚泥を脱水するものであり、前記前処理脱水は、生物処理前の有機性廃水を脱水するものである。
Therefore, in order to solve the above problems, the present invention provides a method for treating organic wastewater in which biological treatment sludge obtained by biological treatment of organic wastewater is subjected to post-treatment dehydration,
The dewatered sludge generated by the post-treatment dewatering is subjected to secondary dewatering by pressing.
Moreover, as another invention, in the organic wastewater treatment method of biologically treating the dehydrated separation liquid after pretreatment dehydrating the organic wastewater in the previous stage of biological treatment,
The dewatered sludge generated by the pretreatment dewatering is subjected to secondary dewatering by pressing.
Here, the post-treatment dehydration is to dehydrate sludge obtained by concentrating the biological treatment liquid after the biological treatment by solid-liquid separation or coagulation separation, and the pre-treatment dehydration is performed before biological treatment. Organic wastewater is dehydrated.

一般に、従来の後処理脱水若しくは前処理脱水では得られる脱水汚泥の含水率は80〜85%程度が限界とされていた。しかし本発明によれば、前記脱水汚泥をさらに圧搾により二次脱水することにより、脱水汚泥の含水率を例えば70%以下の低含水率まで脱水することが可能となり、汚泥を助燃材として用いるなどの汚泥利用範囲が大幅に広がることとなる。さらに、高汚泥含水率となる既存の汚泥脱水を有効に活用しつつ、低汚泥含水率の脱水汚泥を得ることができる。
また、前記二次脱水にて処理対象となる汚泥が既に一次脱水されている脱水汚泥であるため、液状汚泥を対象とする場合よりも構造が簡易となるとともに、大幅に動力を低減することが可能である。尚、前記生物処理汚泥は、前記生物処理からの処理液を固液分離、凝集分離などにより固液分離した汚泥である。
Generally, the water content of dewatered sludge obtained by conventional post-treatment dehydration or pre-treatment dehydration is limited to about 80 to 85%. However, according to the present invention, the dewatered sludge is further dehydrated by pressing, so that the water content of the dewatered sludge can be dehydrated to a low water content of, for example, 70% or less, and the sludge is used as an auxiliary combustion material. The range of sludge use will be greatly expanded. Furthermore, dehydrated sludge having a low sludge moisture content can be obtained while effectively utilizing the existing sludge dewatering with a high sludge moisture content.
In addition, since the sludge to be treated in the secondary dehydration is a dehydrated sludge that has already been primarily dehydrated, the structure is simpler than that for liquid sludge and the power can be greatly reduced. Is possible. The biological treatment sludge is sludge obtained by solid-liquid separation of the treatment liquid from the biological treatment by solid-liquid separation, coagulation separation, or the like.

また、前記二次脱水では、前記脱水汚泥とともに繊維状物質を混合して脱水することを特徴とする。
このとき、前記繊維状物質が、天然由来の物質で且つ生分解性を有する物質であることが好ましい。
このように、繊維状物質を外部添加することにより、二次脱水による脱水性をさらに向上させることができる。また、前記繊維状物質が生物由来で且つ生分解性を有する物質であることにより、脱水汚泥を堆肥化する場合、堆肥化設備にて分解されるとともに、堆肥化に好ましくない高分子凝集剤の使用量を低減することができ、堆肥の高品質化を図ることができる。
さらに、前記有機性廃水に対して夾雑物除去を含む前処理を施した後に前記生物処理する有機性廃水の処理方法であって、
前記夾雑物除去により得られた繊維状夾雑物を前記二次脱水に供給することを特徴とする。このように、系内に存在する汚泥脱水性向上効果のある物質を有効に活用することで、低含水率、高固形物回収率脱水を高効率にて実現することができる。
In the secondary dehydration, a fibrous material is mixed with the dewatered sludge and dehydrated.
At this time, it is preferable that the fibrous substance is a naturally derived substance and a biodegradable substance.
As described above, by adding the fibrous substance to the outside, the dehydrating property by the secondary dehydration can be further improved. In addition, when the fibrous material is a bio-derived and biodegradable material, when dewatered sludge is composted, it is decomposed by a composting facility and is not preferable for composting. The amount used can be reduced, and the quality of compost can be improved.
Furthermore, the organic wastewater treatment method for biologically treating the organic wastewater after performing a pretreatment including removal of impurities,
The fibrous impurities obtained by removing the impurities are supplied to the secondary dehydration. As described above, by effectively utilizing the substance having an effect of improving the sludge dewaterability existing in the system, low water content and high solids recovery rate dewatering can be realized with high efficiency.

また、溶解性の汚濁物質を多量に含む有機性廃水と、固形性の汚濁物質を多量に含む有機性廃水を処理する有機性廃水の処理方法であって、
前記有機性廃水に対して前処理が夫々行われ、該夫々の前処理の構成として、前記溶解性の汚濁物質を多量に含む有機性廃水については少なくとも夾雑物の除去を行い、前記固形性の汚濁物質を多量に含む有機性廃水については少なくとも前処理脱水を行う構成であり、
前記夾雑物除去にて得られた繊維状夾雑物の少なくとも一部を直接若しくは夾雑物脱水により脱水した後、前記前処理脱水にて発生する脱水汚泥とともに二次脱水に供給することを特徴とする。
尚、前記溶解性の汚濁物質を多量に含む有機性廃水とは、例えばし尿、家畜糞尿が挙げられる。また、前記固形性の汚濁物質を多量に含む有機性廃水とは、例えば浄化槽汚泥等が挙げられる。このように、有機性廃水の性状により前処理工程を2系統に分割することにより夫々に適した前処理を行うことができ、効率的な処理が可能となる。
また本発明によれば、前記二次脱水にて、夾雑物中に含まれる繊維分を利用して脱水性向上が図れるとともに、繊維分のリサイクルが可能となるため、外部添加する繊維量を低減することが可能となる。
In addition, an organic wastewater treatment method for treating organic wastewater containing a large amount of soluble pollutants and organic wastewater containing a large amount of solid pollutants,
Each of the organic wastewaters is pretreated, and as a configuration of each of the pretreatments, at least impurities are removed from the organic wastewater containing a large amount of the soluble pollutant, and the solid waste Organic wastewater containing a large amount of pollutants is configured to perform at least pretreatment dehydration,
After at least a part of the fibrous contaminants obtained by the contaminant removal is dehydrated directly or by dehydration of contaminants, and then supplied to the secondary dehydration together with the dewatered sludge generated by the pretreatment dehydration. .
Examples of the organic waste water containing a large amount of the soluble pollutant include human waste and livestock manure. Examples of the organic wastewater containing a large amount of the solid pollutant include septic tank sludge. Thus, by dividing the pretreatment process into two systems depending on the properties of the organic waste water, suitable pretreatment can be performed, and efficient treatment becomes possible.
Further, according to the present invention, in the secondary dehydration, the fiber content contained in the contaminants can be used to improve the dewaterability, and the fiber content can be recycled, so the amount of fiber added externally is reduced. It becomes possible to do.

また、上記した発明と同様の効果を有するシステムの発明として、必要に応じて夾雑物除去装置にて夾雑物除去した有機性廃水を生物処理する生物処理装置と、該生物処理装置にて発生した生物処理汚泥を後処理脱水する後処理脱水装置と、を備えた有機性廃水の処理システムにおいて、
前記後処理脱水装置にて発生した脱水汚泥を圧搾により二次脱水する二次脱水装置を設けたことを特徴とする。
また、必要に応じて夾雑物除去装置にて夾雑物除去した有機性廃水を前処理脱水する前処理脱水装置と、該前処理脱水にて得られた脱水分離液を生物処理する生物処理装置と、を備えた有機性廃水の処理システムにおいて、
前記前処理脱水装置にて発生した脱水汚泥を圧搾により二次脱水する二次脱水装置を設けたことを特徴とする。
In addition, as a system invention having the same effect as the above-described invention, a biological treatment apparatus for biologically treating organic wastewater from which contaminants have been removed by a contaminant removal apparatus as needed, and a biological treatment apparatus generated by the biological treatment apparatus In an organic wastewater treatment system comprising a post-treatment dewatering device for post-treatment dewatering biological treatment sludge,
A secondary dewatering device is provided that dewaters the dewatered sludge generated in the post-treatment dewatering device by pressing.
In addition, a pretreatment dewatering device that pretreats and dehydrates organic wastewater from which contaminants have been removed by a contaminant removal device as necessary, and a biological treatment device that biologically treats the dehydrated separation liquid obtained by the pretreatment dewatering, and In an organic wastewater treatment system with
A secondary dewatering device is provided for secondary dewatering of the dewatered sludge generated in the pretreatment dewatering device by pressing.

さらに、前記二次脱水装置が、外部より繊維状物質を供給する手段を備えることを特徴とする。
このとき、前記繊維状物質供給手段が、天然由来の物質で且つ生分解性を有する物質を供給する手段であることが好ましい。
Furthermore, the secondary dewatering device includes a means for supplying a fibrous substance from the outside.
At this time, it is preferable that the fibrous substance supply means is a means for supplying a naturally derived substance and a biodegradable substance.

また、溶解性の汚濁物質を多量に含む有機性廃水と、固形性の汚濁物質を多量に含む有機性廃水を処理する有機性廃水の処理システムであって、
前記溶解性の汚濁物質を多量に含む有機性廃水については、少なくとも前記夾雑物除去装置を含む前処理設備が設けられ、前記固形性の汚濁物質を多量に含む有機性廃水については、少なくとも前処理脱水装置を含む前処理設備が設けられ、前記夾雑物除去装置により得られた繊維状夾雑物を、直接若しくは夾雑物脱水装置を設けて脱水した後に前記二次脱水装置に供給するラインを設けたことを特徴とする。
また、前記夾雑物脱水装置と前記二次脱水装置が一元化された構成であることを特徴とする。このように、前記夾雑物脱水装置と前記二次脱水装置を一元化することによって、設備の簡素化を図ることができる。また、比較的粗大な繊維を多量に含み、脱水性の良い夾雑物とともに汚泥を脱水することで、汚泥の脱水性が向上し、さらに汚泥脱水に係わる薬品や動力の低減を図ることが可能となる。
In addition, an organic wastewater treatment system for treating organic wastewater containing a large amount of soluble pollutants and organic wastewater containing a large amount of solid pollutants,
For organic wastewater containing a large amount of the soluble pollutant, a pretreatment facility including at least the contaminant removal device is provided, and for organic wastewater containing a large amount of the solid pollutant, at least a pretreatment A pretreatment facility including a dehydrating device is provided, and a line is provided for supplying the secondary dehydrating device to the fibrous debris obtained by the contaminant removing device directly or after dehydrating by providing the contaminant dehydrating device. It is characterized by that.
Further, the contaminant dehydrating apparatus and the secondary dehydrating apparatus are integrated. Thus, by simplifying the contaminant dehydrating apparatus and the secondary dehydrating apparatus, the facilities can be simplified. In addition, by dewatering sludge with a relatively large amount of relatively coarse fibers and dewatering impurities, it is possible to improve the dewaterability of sludge and to reduce chemicals and power related to sludge dewatering. Become.

さらに、前記溶解性の汚濁物質を多量に含む有機性廃水の前処理設備と、前記固形性の汚濁物質を多量に含む有機性廃水の前処理設備を一元化することを特徴とする。このように、異なる種類の有機性廃水の前処理設備を一元化することによって、設備の簡素化を図ることができる。また、比較的粗大な繊維を多量に含み、脱水性の良い夾雑物とともに汚泥を脱水することで、汚泥の脱水性が向上し、さらに汚泥脱水に係わる薬品や動力の低減を図ることが可能となる。
さらにまた、前記固形性の汚濁物質を多量に含む有機性廃水の少なくとも一部を、前記生物処理装置へ直接導入することを特徴とする。これにより、固形性の汚濁物質に多く含まれる粗繊維分が後段の汚泥脱水に流入するため、汚泥の脱水性が向上し、二次脱水に流入する汚泥含水率が低減するため、該二次脱水における動力低減が可能となる。
Further, the present invention is characterized in that a pretreatment facility for organic wastewater containing a large amount of the soluble pollutant and a pretreatment facility for organic wastewater containing a large amount of the solid contaminant are unified. Thus, by simplifying the pretreatment equipment for different types of organic wastewater, the equipment can be simplified. In addition, by dewatering sludge with a relatively large amount of relatively coarse fibers and dewatering impurities, it is possible to improve the dewaterability of sludge and to reduce chemicals and power related to sludge dewatering. Become.
Furthermore, at least a part of the organic waste water containing a large amount of the solid pollutant is directly introduced into the biological treatment apparatus. As a result, the coarse fiber content contained in a large amount of solid pollutants flows into the sludge dewatering in the subsequent stage, so that the dewaterability of the sludge is improved and the moisture content of the sludge flowing into the secondary dewatering is reduced. Power reduction in dehydration is possible.

以上記載のごとく本発明によれば、前処理脱水若しくは後処理脱水にて発生した脱水汚泥を二次脱水する構成としたため、汚泥を助燃材として用いるなど、汚泥利用範囲が大幅に広がり、廃棄物全体の資源化率を向上させることができる。また、系内に存在する汚泥脱水性向上効果のある物質を有効に活用することで、低含水率、高固形物回収率脱水を外部添加物量低減、低動力で以って高効率に実現することが可能となる。   As described above, according to the present invention, since the dewatered sludge generated by the pretreatment dewatering or the posttreatment dewatering is configured to be secondary dewatered, the sludge use range is greatly expanded, such as using the sludge as an auxiliary combustion material, and waste. The overall resource recycling rate can be improved. In addition, by effectively utilizing substances that improve sludge dewaterability in the system, low moisture content and high solids recovery rate dehydration can be achieved with low external power and high efficiency. It becomes possible.

以下、図面を参照して本発明の好適な実施例を例示的に詳しく説明する。但しこの実施例に記載されている構成部品の寸法、材質、形状、その相対的配置等は特に特定的な記載がない限りは、この発明の範囲をそれに限定する趣旨ではなく、単なる説明例に過ぎない。
本実施例にて処理対象とされる有機性廃水は、溶解性の汚濁物質を多量に含む有機性廃水と、固形性の汚濁物質を多量に含む有機性廃水であり、本実施例では、前者としてし尿、後者として浄化槽汚泥を例に挙げて説明する。但し、これらに限定されるものではない。
尚、し尿とは、汲み取り式便所等から回収された生し尿を言い、浄化槽汚泥とは、合併処理浄化槽、コミュニティプラント、農業集落排水施設、漁業集落排水施設、単独処理浄化槽等から収集された汚泥を言う。
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
The organic wastewater to be treated in this embodiment is an organic wastewater containing a large amount of soluble pollutants and an organic wastewater containing a large amount of solid pollutants. In this embodiment, the former As an example, human waste and the latter will be described as septic tank sludge. However, it is not limited to these.
Human waste refers to live sewage collected from a flushing toilet, etc., and septic tank sludge refers to sludge collected from a combined treatment septic tank, community plant, agricultural settlement drainage facility, fishery settlement drainage facility, single treatment septic tank, etc. Say.

本実施例は、有機性廃水処理システムの後処理脱水装置若しくは生物処理後の前処理脱水装置の後段に、二次脱水装置を備えたシステムであり、図1〜5は有機性廃水の生物処理後の固液分離汚泥若しくは凝集分離汚泥を脱水する汚泥脱水装置(後処理脱水装置)の後段に二次脱水装置を備えた構成である実施例1〜5を示す図、図6〜図8は生物処理前の有機性廃水を脱水する前処理脱水装置の後段に二次脱水装置を備えた構成である実施例6〜8を示す図である。   The present embodiment is a system including a secondary dehydration device after the post-treatment dehydration device of the organic wastewater treatment system or the pre-treatment dehydration device after the biological treatment, and FIGS. 1 to 5 show the biological treatment of the organic wastewater. The figure which shows Example 1-5 which is the structure provided with the secondary dehydration apparatus in the back | latter stage of the sludge dehydration apparatus (post-processing dehydration apparatus) which spin-dry | dehydrates the following solid-liquid separation sludge or coagulation | solid separation sludge, FIG. It is a figure which shows Examples 6-8 which are the structures provided with the secondary dehydration apparatus in the back | latter stage of the pre-processing dehydration apparatus which dehydrates the organic waste water before biological treatment.

図1に示した実施例1に係る有機性廃水処理システムは、し尿の前処理工程と、浄化槽汚泥の前処理工程と、これらの前処理を行った廃水に対して生物処理を含む処理を行う一の生物処理工程と、を有する。
前記し尿の前処理工程は、ライン上流から下流に向かって、し尿の受入槽10と、該し尿が投入される夾雑物除去装置12と、該夾雑物除去装置12にて捕集された夾雑物42が投入される夾雑物脱水装置13と、前記夾雑物除去装置12にて分離された夾雑物分離液41と、前記夾雑物脱水装置13にて分離された脱水分離液43とが一時的に貯留されるし尿貯留槽14と、を備える。前記浄化槽汚泥の前処理工程では、同様に浄化槽汚泥受入槽20と、夾雑物除去装置22と、夾雑物脱水装置23と、浄化槽汚泥貯留槽24と、を備える。
The organic wastewater treatment system according to Example 1 shown in FIG. 1 performs a treatment including biological treatment on a pretreatment process of human waste, a pretreatment process of septic tank sludge, and wastewater subjected to these pretreatments. A biological treatment process.
The human waste pretreatment process includes a human waste receiving tank 10, a foreign matter removing device 12 into which the human waste is introduced, and foreign matter collected by the foreign matter removing device 12 from the upstream to the downstream of the line. The dehydration device 13 into which 42 is introduced, the debris separation liquid 41 separated by the debris removal device 12, and the dehydration separation solution 43 separated by the foreign matter dehydration device 13 are temporarily included. A stored human urine storage tank 14; Similarly, the septic tank sludge pretreatment step includes a septic tank sludge receiving tank 20, a contaminant removing device 22, a contaminant dewatering device 23, and a septic tank sludge storage tank 24.

前記生物処理工程は、前記し尿貯留槽14からのし尿45及び前記浄化槽汚泥貯留槽24からの浄化槽汚泥51が投入される生物学的脱窒素処理装置30と、該生物処理後の生物処理液が流入する固液分離装置31と、該固液分離した固液分離液53が流入する凝集分離装置32と、該凝集分離した凝集分離液55が流入する高度処理設備33と、前記固液分離装置31からの固液分離汚泥54と前記凝集分離装置32からの凝集分離汚泥56が投入される汚泥脱水装置34と、を備え、さらに本実施例の特徴的な構成として、前記汚泥脱水装置34からの脱水汚泥をさらに二次脱水する二次脱水装置35と、を備えている。また、前記固液分離装置31からの分離汚泥54の一部を返送汚泥54aとして前記生物学的脱窒素装置30に返送するラインと、前記汚泥脱水装置34からの脱水分離液及び前記二次脱水装置35からの脱水分離液59を前記生物学的脱窒素装置40に導入するラインとを備える。   The biological treatment process includes a biological denitrification apparatus 30 into which human waste 45 from the human waste storage tank 14 and septic tank sludge 51 from the septic tank sludge storage tank 24 are charged, and a biological treatment liquid after the biological treatment is performed. An inflowing solid-liquid separation device 31, an aggregating separation device 32 into which the solid-liquid separated liquid-liquid separation solution 53 flows in, an advanced processing facility 33 into which the aggregating-separated aggregation-separating solution 55 flows in, and the solid-liquid separation device 31 and a sludge dewatering device 34 into which the coagulation / separation sludge 56 from the coagulation / separation device 32 is introduced. Further, as a characteristic configuration of the present embodiment, the sludge dewatering device 34 And a secondary dewatering device 35 for further secondary dewatering of the dewatered sludge. Further, a line for returning a part of the separated sludge 54 from the solid-liquid separator 31 to the biological denitrifier 30 as a return sludge 54a, a dehydrated separation liquid from the sludge dehydrator 34, and the secondary dehydration A line for introducing the dehydrated separation liquid 59 from the apparatus 35 into the biological denitrification apparatus 40.

前記夾雑物除去装置12、22は、し尿40又は浄化槽汚泥46から夾雑物を除去する設備であり、スクリーン等が挙げられる。本実施例では、この夾雑物除去設備1を設けない構成としても良く、この場合、前記有機性廃水20の全量を前記脱水設備2に流入させる。
前記夾雑物脱水装置13、23は、し尿40又は浄化槽汚泥46を所定の含水率となるまで脱水する設備であり、例えば、遠心分離装置やベルトプレス、スクリュープレス等のろ布式脱水装置等が挙げられる。該脱水設備2では、無機凝集剤、高分子凝集剤等の脱水助剤を添加した後に脱水することが好ましい。
また、前記夾雑物脱水装置13、23の入口側に、破砕手段を設けることが好ましく、これにより有機性廃水中の大径の夾雑物を小粒径化できるため、該脱水設備13、23の目詰まり等の不具合を防止できる。
The impurities removing devices 12 and 22 are facilities for removing impurities from the human waste 40 or the septic tank sludge 46, and examples thereof include a screen. In the present embodiment, the contaminant removal equipment 1 may not be provided. In this case, the entire amount of the organic waste water 20 is caused to flow into the dehydration equipment 2.
The contaminant dewatering devices 13 and 23 are facilities for dewatering the human waste 40 or the septic tank sludge 46 until a predetermined water content is reached. For example, a filter cloth type dewatering device such as a centrifugal separator, a belt press, or a screw press is used. Can be mentioned. In the dehydration equipment 2, it is preferable to dehydrate after adding a dehydrating aid such as an inorganic flocculant or a polymer flocculant.
Further, it is preferable to provide a crushing means on the inlet side of the debris dewatering devices 13 and 23, whereby a large-diameter foreign matter in the organic waste water can be reduced in size. Problems such as clogging can be prevented.

前記生物学的脱窒素処理装置30は、微生物の分解作用により処理液中の有機物を分解する設備であり、生物学的脱窒素装置の他にも曝気処理設備、嫌気性発酵設備等の各種生物処理装置を用いることができ、またこれらを一又は適宜組み合わせて用いるようにしても良い。
前記固液分離装置31は、生物処理液52を固液分離液53と固液分離汚泥54とに分離する装置であり、重力沈降方式、遠心分離方式、、膜分離方式、凝集分離方式、浮上分離方式等を用いることができる。
前記凝集分離装置32は、固液分離液53中の汚濁物質を凝集剤の添加により結合させ、フロックを形成し、分離する装置である。
前記高度処理装置33としては活性炭吸着塔等が挙げられ、前記固液分離後の処理液が放流水準に満たない場合に必要に応じて設置すると良い。前記凝集分離装置32が高度処理に含まれる場合もある。
The biological denitrogenation device 30 is a facility for decomposing organic substances in the processing liquid by the decomposition action of microorganisms. In addition to the biological denitrification device, various biological products such as an aeration treatment facility and an anaerobic fermentation facility are provided. A processing apparatus can be used, and these may be used alone or in combination.
The solid-liquid separation device 31 is a device that separates the biological treatment liquid 52 into a solid-liquid separation liquid 53 and a solid-liquid separation sludge 54, and includes a gravity sedimentation method, a centrifugal separation method, a membrane separation method, a coagulation separation method, and a flotation method. A separation method or the like can be used.
The aggregating / separating apparatus 32 is an apparatus that binds the pollutants in the solid-liquid separating liquid 53 by adding an aggregating agent to form flocs and separate them.
Examples of the advanced processing device 33 include an activated carbon adsorption tower, and it may be installed as necessary when the processing liquid after the solid-liquid separation is less than the discharge level. The coagulation / separation device 32 may be included in advanced processing.

前記汚泥脱水装置34は、生物処理後の固液分離汚泥54及び凝集分離汚泥56を脱水する装置である。
前記二次脱水装置35は、前記汚泥脱水装置34から発生する脱水汚泥をさらに圧搾する装置であり、これらの脱水装置34、35は、夫々遠心分離装置やベルトプレス、スクリュープレス等のろ布式脱水装置等を適宜用いる。このとき装置の選定には、要求される脱水性能に応じた装置とすると良い。特に好ましい形態としては、前記脱水装置34として遠心分離装置又はベルトプレスを用い、前記二次脱水装置35としてはスクリュープレス等の圧搾方式による装置を用いる。該脱水装置34、35では、無機凝集剤、高分子凝集剤等の脱水助剤を添加した後に脱水するようにしても良い。
また、前記二次脱水装置35からの脱水汚泥58を処理する汚泥処理設備を設けるようにしても良い。
The sludge dewatering device 34 is a device for dewatering the solid-liquid separated sludge 54 and the coagulated separated sludge 56 after biological treatment.
The secondary dewatering device 35 is a device that further squeezes the dewatered sludge generated from the sludge dewatering device 34. These dewatering devices 34 and 35 are filter cloth type devices such as a centrifugal separator, a belt press, and a screw press, respectively. A dehydrator or the like is used as appropriate. At this time, it is preferable to select a device according to the required dewatering performance. As a particularly preferred embodiment, a centrifugal separator or a belt press is used as the dehydrating device 34, and an apparatus using a compression system such as a screw press is used as the secondary dehydrating device 35. The dehydrators 34 and 35 may be dehydrated after adding a dehydrating aid such as an inorganic flocculant or a polymer flocculant.
Further, a sludge treatment facility for treating the dewatered sludge 58 from the secondary dewatering device 35 may be provided.

以上の構成を有するシステムについて、その作用を処理方法とともに説明する。
まず、し尿前処理工程では、し尿貯受入槽10に受け入れたし尿40を圧送ポンプ11により適宜量ずつ夾雑物除去装置12に送給し、し尿中の夾雑物42を分離除去する。分離した夾雑物42は、夾雑物脱水装置13に投入して脱水を行う。前記夾雑物脱水装置13にて分離された脱水分離液43は前記夾雑物除去装置12にて分離された夾雑物分離液41とともにし尿貯留槽14に一時的に貯留される。
同様に、浄化槽前処理工程では、浄化槽受入槽20に受け入れた浄化槽汚泥46を圧送ポンプ21により適宜量ずつ夾雑物除去装置22に送給し、浄化槽汚泥中の夾雑物48を分離除去する。分離した夾雑物48は、夾雑物脱水装置23に投入して脱水を行う。前記夾雑物脱水装置23にて分離された脱水分離液49は前記夾雑物除去装置22にて分離された夾雑物分離液47とともに浄化槽汚泥貯留槽24に一時的に貯留される。
The operation of the system having the above configuration will be described together with a processing method.
First, in the human waste pretreatment process, the human waste 40 received in the human waste storage tank 10 is fed to the foreign matter removing device 12 by an appropriate amount by the pumping pump 11, and the foreign matter 42 in the human waste is separated and removed. The separated contaminants 42 are put into the contaminant dewatering device 13 for dehydration. The dehydrated separation liquid 43 separated by the contaminant dehydrating apparatus 13 is temporarily stored in the urine storage tank 14 together with the contaminant separating liquid 41 separated by the contaminant removing apparatus 12.
Similarly, in the septic tank pretreatment step, the septic tank sludge 46 received in the septic tank receiving tank 20 is fed to the contaminant removal device 22 by an appropriate amount by the pressure pump 21 to separate and remove the contaminants 48 in the septic tank sludge. The separated contaminant 48 is put into the contaminant dewatering device 23 and dehydrated. The dehydrated separation liquid 49 separated by the foreign matter dewatering device 23 is temporarily stored in the septic tank sludge storage tank 24 together with the foreign matter separation liquid 47 separated by the foreign matter removing device 22.

前記し尿貯留槽14及び前記浄化槽汚泥貯留槽24に貯留された前処理済みのし尿45及び浄化槽汚泥51は、夫々圧送ポンプ15、25により所定量ずつ前記生物学的脱窒素処理装置30に送られる。該生物学的脱窒素処理装置30では、し尿45及び浄化槽汚泥51の混合物からなる廃水中からBOD、T−N(全窒素)等が除去され、発生した生物処理液52は固液分離装置31に流入される。該固液分離装置31で得られた固液分離液53は凝集剤を添加されて凝集分離装置32に流入し、ここでT−P(リン)、COD、色度成分等が除去され、さらに高度処理装置33に送られて水質基準を満たすように浄化された後に処理液57は系外へ放流される。   Pretreated human waste 45 and septic tank sludge 51 stored in the human waste storage tank 14 and the septic tank sludge storage tank 24 are sent to the biological denitrification apparatus 30 by a predetermined amount by the pumps 15 and 25, respectively. . In the biological denitrification apparatus 30, BOD, TN (total nitrogen) and the like are removed from the wastewater composed of the mixture of human waste 45 and septic tank sludge 51, and the generated biological treatment liquid 52 is a solid-liquid separation apparatus 31. Is flowed into. The solid-liquid separation liquid 53 obtained by the solid-liquid separation apparatus 31 is added with a flocculant and flows into the aggregation separation apparatus 32, where TP (phosphorus), COD, chromaticity components, etc. are removed, and After being sent to the advanced treatment apparatus 33 and purified so as to meet the water quality standard, the treatment liquid 57 is discharged out of the system.

一方、前記固液分離装置31からの固液分離汚泥54及び前記凝集分離装置32からの凝集分離汚泥56は汚泥脱水装置34に投入され、ここで脱水処理が施される。このとき、遠心分離機やベルトプレス等の脱水装置を利用した場合、得られる脱水汚泥の含水率は一般的に80〜85%が限界とされている。従って、本実施例では、前記脱水汚泥をさらに前記二次脱水装置35にて圧搾するようにしている。これにより、含水率70%以下の脱水汚泥58を得ることができる。また、前記固液分離装置31からの固液分離汚泥54の少なくとも一部を返送汚泥54aとして前記生物学的脱窒素装置30に返送すると良い。
このようにして得られた脱水汚泥58は、汚泥処理設備にて燃料化、焼却、乾燥、堆肥化、埋立て等の処理がなされる。また、脱水汚泥58の含水率が70%以下であれば、燃料としてごみ焼却炉等へ投入することも可能である。一方、前記汚泥脱水装置34からの脱水分離液及び前記二次脱水装置35からの脱水分離液59は前記生物学的脱窒素装置30に導入する。
On the other hand, the solid-liquid separation sludge 54 from the solid-liquid separation device 31 and the flocculation separation sludge 56 from the flocculation separation device 32 are input to the sludge dewatering device 34, where dehydration processing is performed. At this time, when a dehydrator such as a centrifugal separator or a belt press is used, the water content of the dehydrated sludge obtained is generally limited to 80 to 85%. Therefore, in this embodiment, the dewatered sludge is further squeezed by the secondary dewatering device 35. Thereby, the dewatered sludge 58 with a moisture content of 70% or less can be obtained. Further, at least a part of the solid-liquid separation sludge 54 from the solid-liquid separation device 31 may be returned to the biological denitrification device 30 as a return sludge 54a.
The dewatered sludge 58 obtained in this way is processed into fuel, incinerated, dried, composted, landfilled, etc. in a sludge treatment facility. In addition, if the water content of the dewatered sludge 58 is 70% or less, it can be put into a waste incinerator or the like as fuel. On the other hand, the dehydration separation liquid from the sludge dehydration apparatus 34 and the dehydration separation liquid 59 from the secondary dehydration apparatus 35 are introduced into the biological denitrification apparatus 30.

本実施例によれば、二次脱水装置35を設けることにより、脱水汚泥の含水率を向上させることが可能となり、汚泥を助燃材として用いるなど、汚泥活用範囲が大幅に広がるという利点を有する。さらに、高汚泥含水率となる既存の汚泥脱水装置34を有効に活用しつつ、低汚泥含水率の脱水汚泥を得ることができる。
また、前記二次脱水装置35にて処理対象となる汚泥が既に一次脱水されている脱水汚泥であるため、液状汚泥を対象とする場合よりも構造が簡易となるとともに、動力を大幅に低減することが可能である。
According to the present embodiment, by providing the secondary dewatering device 35, it becomes possible to improve the moisture content of the dewatered sludge, and there is an advantage that the range of sludge utilization is greatly expanded, such as using sludge as an auxiliary combustion material. Furthermore, dehydrated sludge having a low sludge moisture content can be obtained while effectively utilizing the existing sludge dewatering device 34 having a high sludge moisture content.
In addition, since the sludge to be treated in the secondary dewatering device 35 is dehydrated sludge that has already been primarily dehydrated, the structure is simpler than that for liquid sludge and the power is greatly reduced. It is possible.

図2に本実施例2に係る有機性廃水処理システムを示す。以下、本実施例2〜実施例5において、前記実施例1と略同様の構成についてはその詳細な説明を省略する。
本実施例2に係るシステムでは、前記実施例1の構成に加えて、前記二次脱水装置35に繊維状物質60を供給する手段を備えた構成となっている。そして、前記生物学的脱窒素処理装置30から排出される生物処理液52を固液分離装置31にて固液分離して得られた固液分離汚泥54と、固液分離液53を凝集分離装置32にて凝集分離して得られた凝集分離汚泥56とともに脱水装置34にて脱水処理した後に、二次脱水装置35にて外部添加した繊維状物質60を混合して二次脱水するようにしている。
FIG. 2 shows an organic wastewater treatment system according to the second embodiment. Hereinafter, in the second embodiment to the fifth embodiment, detailed description of the configuration substantially similar to that of the first embodiment is omitted.
In the system according to the second embodiment, in addition to the configuration of the first embodiment, a unit for supplying the fibrous substance 60 to the secondary dehydrator 35 is provided. The solid-liquid separation sludge 54 obtained by solid-liquid separation of the biological treatment liquid 52 discharged from the biological denitrification apparatus 30 by the solid-liquid separation apparatus 31 and the solid-liquid separation liquid 53 are agglomerated and separated. After dewatering in the dewatering device 34 together with the coagulated and separated sludge 56 obtained by coagulating and separating in the device 32, the fibrous material 60 added externally in the secondary dewatering device 35 is mixed and subjected to secondary dewatering. ing.

好適には前記繊維状物質は天然由来の物質であり、且つ生分解性を有すると良く、例えば、もみ殻、麦わら、稲わら等、又はおが粉等の木質系、紙類、堆肥化発酵促進剤添加物質等が挙げられる。
このように、繊維状物質60を外部添加することにより、二次脱水装置35による脱水性をさらに向上させることができる。
また、前記繊維状物質60が生物由来で且つ生分解性を有する物質であることにより、脱水汚泥を堆肥化する場合、堆肥化設備にて分解されるとともに、堆肥化に好ましくない高分子凝集剤の使用量を低減することができ、堆肥の高品質化を図ることができる。また、前記繊維状物質60として、発酵促進機能を有する物質を使用すれば、堆肥化設備での発酵性向上効果を併せて得ることができる。さらに、前記繊維状物質60を外部添加することで、脱水装置内の脱水面での汚泥の剥離性が良くなるため、目詰まりによるトラブルが防止できるとともに、洗浄水量の大幅低減を図ることができる。特に、ろ布式の脱水設備を採用する場合にはこの効果が顕著となる。
Preferably, the fibrous material is a naturally derived material and is biodegradable, for example, woody materials such as rice husk, wheat straw, rice straw, or sawdust, paper, composting fermentation Examples include accelerator-added substances.
In this way, by adding the fibrous substance 60 to the outside, the dehydrating property of the secondary dehydrating device 35 can be further improved.
In addition, when the fibrous material 60 is a bio-derived and biodegradable material, when dewatered sludge is composted, it is decomposed in a composting facility and is not preferable for composting. Can be used, and the quality of compost can be improved. Moreover, if the substance which has a fermentation promotion function is used as the said fibrous substance 60, the fermentability improvement effect in composting equipment can be acquired collectively. Further, by externally adding the fibrous substance 60, the sludge removability on the dewatering surface in the dewatering device is improved, so that troubles due to clogging can be prevented and the amount of washing water can be greatly reduced. . In particular, when a filter cloth type dewatering facility is employed, this effect becomes remarkable.

図3に本実施例3に係る有機性廃水処理システムを示す。
本実施例3に係るシステムは、前記実施例1の構成に加えて、前記夾雑物脱水装置13、23からの脱水し渣44、50を、前記二次脱水装置35に供給する構成となっている。前記生物学的脱窒素処理装置30から排出される生物処理液52を固液分離装置31にて固液分離して得られた固液分離汚泥54と、固液分離液53を凝集分離装置32にて凝集分離して得られた凝集分離汚泥56とともに、前記脱水し渣44、50を前記二次脱水装置35に供給する。このとき、同時に前記実施例2のごとく繊維状物質60を外部添加するようにしても良い。
本実施例によれば、前記二次脱水装置35にて、前記脱水し渣44、50に含有される繊維分を利用して脱水性向上が図れるとともに、繊維分のリサイクルが可能となるため、外部添加する繊維量を低減することが可能となる。
FIG. 3 shows an organic wastewater treatment system according to the third embodiment.
In addition to the configuration of the first embodiment, the system according to the third embodiment supplies dehydration residue 44 and 50 from the contaminant dehydration devices 13 and 23 to the secondary dehydration device 35. Yes. The solid-liquid separation sludge 54 obtained by solid-liquid separation of the biological treatment liquid 52 discharged from the biological denitrification apparatus 30 by the solid-liquid separation apparatus 31 and the solid-liquid separation liquid 53 are agglomerated and separated apparatus 32. The dewatered residue 44 and 50 are supplied to the secondary dewatering device 35 together with the coagulated and separated sludge 56 obtained by coagulation and separation in the above. At this time, the fibrous material 60 may be externally added as in the second embodiment.
According to this embodiment, the secondary dewatering device 35 can improve the dewaterability by using the fibers contained in the dewatered residues 44 and 50, and the fibers can be recycled. It is possible to reduce the amount of fibers added externally.

図4に本実施例4に係る有機性廃水処理システムを示す。
本実施例4に係るシステムは、前記実施例1の構成において、し尿前処理工程と浄化槽前処理工程を一元化した構成となっている。即ち、し尿受入槽10に貯留されたし尿40と、浄化槽汚泥受入槽20に貯留された浄化槽汚泥46とが混合して投入される一の夾雑物除去装置12を設け、該夾雑物除去装置12にて分離された夾雑物42を夾雑物脱水装置13にて脱水し、脱水分離液43は前記夾雑物除去装置12からの夾雑物分離液41とともに廃水貯留槽14に一時的に貯留される。該廃水貯留槽14に貯留されたし尿と浄化槽汚泥の混合物からなる廃水45は、圧送ポンプ15により前記生物学的脱窒素装置30に送られる。
一方、前記夾雑物脱水装置13にて得られた脱水し渣44は、前記二次脱水装置35に供給される。
このように、し尿と浄化槽汚泥の前処理設備及び前記二次脱水装置35を一元化することによって、設備の簡素化を図ることができる。
また、比較的粗大な繊維を多量に含み、脱水性の良い夾雑物とともに汚泥を脱水することで、汚泥の脱水性が向上し、さらに汚泥脱水に係わる薬品や動力の低減を図ることが可能となる。
FIG. 4 shows an organic wastewater treatment system according to the fourth embodiment.
The system according to the fourth embodiment has a configuration in which the human waste pretreatment process and the septic tank pretreatment process are unified in the configuration of the first embodiment. That is, one contaminant removing device 12 into which the human waste 40 stored in the human waste receiving tank 10 and the septic tank sludge 46 stored in the septic tank sludge receiving tank 20 are mixed and introduced is provided, and the contaminant removing device 12 is provided. The debris 42 separated in (1) is dehydrated by the debris dewatering device 13, and the dehydrated separation liquid 43 is temporarily stored in the wastewater storage tank 14 together with the debris separation liquid 41 from the foreign matter removal apparatus 12. Waste water 45 made of a mixture of human waste and septic tank sludge stored in the waste water storage tank 14 is sent to the biological denitrification apparatus 30 by a pressure pump 15.
On the other hand, the dewatered residue 44 obtained by the contaminant dewatering device 13 is supplied to the secondary dewatering device 35.
Thus, by simplifying the pretreatment equipment for human waste and septic tank sludge and the secondary dehydrator 35, the equipment can be simplified.
In addition, by dewatering sludge with a relatively large amount of relatively coarse fibers and dewatering impurities, it is possible to improve the dewaterability of sludge and to reduce chemicals and power related to sludge dewatering. Become.

図5に本実施例5に係る有機性廃水処理システムを示す。
本実施例5に係るシステムは、前記実施例1の構成において、し尿及び浄化槽汚泥の前処理工程において、夾雑物除去装置12、22にて捕集された夾雑物を除去する夾雑物脱水装置と、前記生物処理後の固液分離汚泥54及び凝集分離汚泥56を汚泥脱水装置34にて一次脱水した脱水汚泥を二次脱水する二次脱水装置35を一元化した構成となっている。即ち、し尿受入槽10に貯留されたし尿40は、夾雑物除去装置12に投入され、得られた夾雑物分離液41は前記し尿貯留槽14に送給され、夾雑物42はそのまま前記二次脱水装置35に供給される。同様に、浄化槽汚泥受入槽20に貯留された浄化槽汚泥46は、夾雑物除去装置22に投入され、得られた夾雑物分離液48は前記浄化槽汚泥貯留槽24に送給され、夾雑物48はそのまま前記二次脱水装置35に供給され、前記夾雑物42、48と前記脱水汚泥を混合して脱水される。
このように夾雑物脱水装置13、23を前記二次脱水装置35にて共用する構成とすることによって、設備の簡素化を図ることができる。
また、比較的粗大な繊維を多量に含み、脱水性の良い夾雑物とともに汚泥を脱水することで、汚泥の脱水性が向上し、さらに汚泥脱水に係わる薬品や動力の低減を図ることが可能となる。
FIG. 5 shows an organic wastewater treatment system according to the fifth embodiment.
The system according to the fifth embodiment is the same as that of the first embodiment. In the pretreatment process of human waste and septic tank sludge, the contaminant dehydrating apparatus that removes the contaminants collected by the contaminant removing apparatuses 12 and 22 and The secondary dewatering device 35 for performing secondary dehydration of the dewatered sludge obtained by primarily dehydrating the solid-liquid separated sludge 54 and the coagulated separated sludge 56 after the biological treatment with the sludge dewatering device 34 is configured. That is, the human waste 40 stored in the human waste receiving tank 10 is put into the foreign matter removing device 12, the obtained foreign matter separation liquid 41 is fed to the human waste storage tank 14, and the foreign matter 42 is left as it is in the secondary. It is supplied to the dehydrator 35. Similarly, the septic tank sludge 46 stored in the septic tank sludge receiving tank 20 is input to the contaminant removal device 22, and the obtained contaminant separation liquid 48 is supplied to the septic tank sludge storage tank 24, and the contaminant 48 is It is supplied to the secondary dewatering device 35 as it is, and the impurities 42 and 48 and the dewatered sludge are mixed and dewatered.
Thus, by using the configuration in which the contaminant dewatering devices 13 and 23 are shared by the secondary dewatering device 35, the facilities can be simplified.
In addition, by dewatering sludge with a relatively large amount of relatively coarse fibers and dewatering impurities, it is possible to improve the dewaterability of sludge and to reduce chemicals and power related to sludge dewatering. Become.

さらにまた、前記実施例1〜実施例5に記載した構成において、浄化槽汚泥貯留槽20に受け入れた浄化槽汚泥46を、夾雑物除去することなく生物学的脱窒素装置30に供給するようにしても良い。即ち、前記夾雑物除去装置22及び前記夾雑物脱水装置23を省いた構成とする。
これにより、浄化槽汚泥中の粗繊維分が後段の汚泥脱水装置34に流入するため、汚泥の脱水性が向上し、二次脱水装置35に流入する汚泥含水率が低減するため、該二次脱水装置35の動力低減を図ることが可能である。
Furthermore, in the configurations described in the first to fifth embodiments, the septic tank sludge 46 received in the septic tank sludge storage tank 20 may be supplied to the biological denitrification apparatus 30 without removing impurities. good. That is, the contaminant removing device 22 and the contaminant dewatering device 23 are omitted.
As a result, the crude fiber content in the septic tank sludge flows into the subsequent sludge dewatering device 34, so that the dewaterability of the sludge is improved and the moisture content of the sludge flowing into the secondary dewatering device 35 is reduced. It is possible to reduce the power of the device 35.

図6に本実施例6に係る有機性廃水処理システムを示す。
本実施例6に係るシステムは、前記実施例1の構成において、浄化槽汚泥貯留槽24に貯留された前処理後の浄化槽汚泥51を前処理脱水装置36に供給し、該前処理脱水装置36にて前処理脱水した後に二次脱水装置37にて圧搾による二次脱水を行う構成としている。該二次脱水により得られた脱水汚泥58は低含水率の汚泥となる。また、前記前処理脱水装置36及び前記二次脱水装置37にて得られた脱水分離液61は、分離液槽38に一旦貯留された後、所定量ずつ生物学的脱窒素装置30に供給され、前処理後のし尿45と混合されて生物処理される。
また、前記生物学的脱窒素装置30により発生した生物処理液を固液分離装置31にて固液分離して得られた固液分離汚泥54及び凝集分離装置32にて得られた凝集分離汚泥56を、前記前処理脱水装置36に供給して前記浄化槽汚泥51と混合して脱水し、さらに二次脱水装置37にて二次脱水するようにしても良い。
FIG. 6 shows an organic wastewater treatment system according to the sixth embodiment.
The system according to the sixth embodiment supplies the septic tank sludge 51 after the pretreatment stored in the septic tank sludge storage tank 24 to the pretreatment dehydrator 36 in the configuration of the first embodiment, Then, after the pretreatment dehydration, the secondary dehydration device 37 performs secondary dehydration by pressing. The dewatered sludge 58 obtained by the secondary dewatering becomes a sludge having a low water content. The dehydrated separation liquid 61 obtained by the pretreatment dehydrator 36 and the secondary dehydrator 37 is once stored in the separation liquid tank 38 and then supplied to the biological denitrification apparatus 30 by a predetermined amount. The biological treatment is performed by mixing with the pre-treated human waste 45.
Further, the solid-liquid separation sludge 54 obtained by solid-liquid separation of the biological treatment liquid generated by the biological denitrification device 30 by the solid-liquid separation device 31 and the flocculation separation sludge obtained by the flocculation separation device 32. 56 may be supplied to the pretreatment dewatering device 36, mixed with the septic tank sludge 51 and dehydrated, and further dehydrated by the secondary dewatering device 37.

前記前処理脱水装置36及び前記二次脱水装置37は、実施例1と同様に、夫々遠心分離装置やベルトプレス、スクリュープレス等のろ布式脱水装置等を適宜用いることができ、特に好ましい形態としては、前記前処理脱水装置36として遠心分離装置又はベルトプレスを用い、前記二次脱水装置37としてはスクリュープレス等の圧搾方式による装置を用いる。
本実施例では、前処理脱水装置36の後段に、さらに圧搾により有機性廃水を二次脱水する二次脱水装置37を設けることにより、脱水効率をさらに向上させることが可能となる。また、前記二次脱水装置37にて処理対象となる汚泥が既に一次脱水されている脱水汚泥であるため、液状汚泥を対象とする場合よりも構造が簡易となるとともに、動力を大幅に低減することが可能である。
The pretreatment dewatering device 36 and the secondary dewatering device 37 can use a centrifugal separation device, a filter cloth dewatering device such as a belt press, a screw press, or the like as appropriate in the same manner as in the first embodiment. As the pretreatment dewatering device 36, a centrifugal separator or a belt press is used, and as the secondary dewatering device 37, an apparatus using a compression system such as a screw press is used.
In this embodiment, it is possible to further improve the dewatering efficiency by providing a secondary dewatering device 37 for secondary dewatering of the organic waste water by squeezing after the pretreatment dewatering device 36. In addition, since the sludge to be treated in the secondary dehydrator 37 is dehydrated sludge that has already been primarily dehydrated, the structure is simpler than that for liquid sludge and the power is greatly reduced. It is possible.

図7に本実施例7に係る有機性廃水処理システムを示す。
本実施例7に係るシステムは、前記実施例6の構成において、し尿前処理工程と浄化槽前処理工程を一元化した構成となっている。即ち、し尿受入槽10に貯留されたし尿40と、浄化槽汚泥受入槽20に貯留された浄化槽汚泥46とが混合して投入される一の夾雑物除去装置12を設け、該夾雑物除去装置12にて分離された夾雑物42を夾雑物脱水装置13にて脱水し、脱水分離液43は前記夾雑物除去装置12からの夾雑物分離液41とともに廃水貯留槽14に一時的に貯留される。該廃水貯留槽14に貯留されたし尿と浄化槽汚泥の混合物からなる廃水45は、圧送ポンプ15により前処理脱水装置36に供給され、前処理脱水した後に脱水汚泥をさらに二次脱水装置37により二次脱水する。また、前記夾雑物脱水装置13にて得られた脱水し渣44は、前記二次脱水装置37に供給され、前記前処理脱水装置36からの脱水汚泥とともに脱水される。
FIG. 7 shows an organic wastewater treatment system according to the seventh embodiment.
The system according to the seventh embodiment has a configuration in which the human waste pretreatment process and the septic tank pretreatment process are unified in the configuration of the sixth embodiment. That is, one contaminant removing device 12 into which the human waste 40 stored in the human waste receiving tank 10 and the septic tank sludge 46 stored in the septic tank sludge receiving tank 20 are mixed and introduced is provided, and the contaminant removing device 12 is provided. The debris 42 separated in (1) is dehydrated by the debris dewatering device 13, and the dehydrated separation liquid 43 is temporarily stored in the wastewater storage tank 14 together with the debris separation liquid 41 from the foreign matter removal apparatus 12. Waste water 45 comprising a mixture of human waste and septic tank sludge stored in the waste water storage tank 14 is supplied to the pretreatment dewatering device 36 by the pressure pump 15, and after the pretreatment dewatering, the dewatered sludge is further removed by the secondary dewatering device 37. Next dehydrated. Further, the dewatered residue 44 obtained by the contaminant dewatering device 13 is supplied to the secondary dewatering device 37 and dehydrated together with the dewatered sludge from the pretreatment dewatering device 36.

前記前処理脱水装置36及び前記二次脱水装置37からの脱水分離液61は一旦分離液槽38に貯留された後、所定量ずつ生物学的脱窒素装置30に供給され、生物処理を施される。この生物処理液は固液分離装置31、凝集分離装置32、高度処理装置33を経て浄化された処理液57として放流される。一方、前記固液分離装置31からの固液分離汚泥54及び前記凝集分離装置32からの凝集分離汚泥56は、前記廃水貯留槽14に供給され、有機性廃水とともに処理される。
本実施例のように、し尿と浄化槽汚泥の前処理設備及び前記二次脱水装置37を一元化することによって、設備の簡素化を図ることができる。また、前記二次脱水装置37に脱水し渣を供給し、比較的粗大な繊維を多量に含み、脱水性の良い夾雑物とともに汚泥を脱水することで、汚泥の脱水性が向上し、さらに汚泥脱水に係わる薬品や動力の低減を図ることが可能となる。
The dehydrated separation liquid 61 from the pretreatment dehydrator 36 and the secondary dehydrator 37 is once stored in the separation liquid tank 38 and then supplied to the biological denitrification apparatus 30 by a predetermined amount and subjected to biological treatment. The This biological treatment liquid is discharged as a purified treatment liquid 57 through the solid-liquid separation device 31, the agglomeration separation device 32, and the advanced treatment device 33. On the other hand, the solid-liquid separation sludge 54 from the solid-liquid separation device 31 and the flocculation separation sludge 56 from the flocculation separation device 32 are supplied to the wastewater storage tank 14 and processed together with organic wastewater.
As in the present embodiment, the equipment can be simplified by unifying the pretreatment equipment for human waste and septic tank sludge and the secondary dehydrator 37. Further, dewatering of the sludge is improved by supplying dewatered residue to the secondary dewatering device 37, dewatering sludge together with a large amount of relatively coarse fibers and dewatering impurities. It is possible to reduce chemicals and power related to dehydration.

図8に本実施例8に係る有機性廃水処理システムを示す。
本実施例8に係るシステムは、前記実施例7の構成において、夾雑物脱水装置13を設けずに、前記二次脱水装置37が夾雑物の脱水を兼ねるようにし、夾雑物除去装置12からの夾雑物と前記前処理脱水装置36からの脱水汚泥を混合して前記二次脱水装置37にて脱水するようにしている。
本実施例によれば、系内に存在する汚泥脱水性向上効果のある物質(夾雑物)を有効に活用することで、低含水率、高固形物回収率脱水を高効率にて実現するとともに、前記夾雑物脱水装置を前記二次脱水装置37にて共用する構成とすることによって、設備の簡素化を図ることができる。
FIG. 8 shows an organic wastewater treatment system according to the eighth embodiment.
In the system according to the eighth embodiment, in the configuration of the seventh embodiment, the secondary dewatering device 37 also serves to dehydrate the foreign material without providing the foreign material dewatering device 13. Contaminants and the dewatered sludge from the pretreatment dewatering device 36 are mixed and dewatered by the secondary dewatering device 37.
According to the present embodiment, by effectively utilizing a substance (contaminant) having an effect of improving sludge dewaterability existing in the system, low water content and high solids recovery rate can be achieved with high efficiency. By using a configuration in which the contaminant dewatering device is shared by the secondary dewatering device 37, the facilities can be simplified.

本発明によれば、生物処理後の汚泥の脱水率を向上させることができるため、脱水汚泥の燃料化、堆肥化等の何れの場合においても有効に活用できる。   According to the present invention, since the dewatering rate of the sludge after biological treatment can be improved, the sludge can be effectively used in any case of dewatered sludge as fuel, compost, and the like.

本発明の実施例1に係る有機性廃水処理システムの全体ブロック図である。1 is an overall block diagram of an organic wastewater treatment system according to Embodiment 1 of the present invention. 本発明の実施例2に係る有機性廃水処理システムの全体ブロック図である。It is a whole block diagram of the organic wastewater treatment system which concerns on Example 2 of this invention. 本発明の実施例3に係る有機性廃水処理システムの全体ブロック図である。It is a whole block diagram of the organic wastewater treatment system which concerns on Example 3 of this invention. 本発明の実施例4に係る有機性廃水処理システムの全体ブロック図である。It is a whole block diagram of the organic wastewater treatment system which concerns on Example 4 of this invention. 本発明の実施例5に係る有機性廃水処理システムの全体ブロック図である。It is a whole block diagram of the organic wastewater treatment system which concerns on Example 5 of this invention. 発明の実施例6に係る有機性廃水処理システムの全体ブロック図である。It is a whole block diagram of the organic waste water treatment system which concerns on Example 6 of invention. 発明の実施例7に係る有機性廃水処理システムの全体ブロック図である。It is a whole block diagram of the organic wastewater treatment system which concerns on Example 7 of invention. 発明の実施例8に係る有機性廃水処理システムの全体ブロック図である。It is a whole block diagram of the organic wastewater treatment system which concerns on Example 8 of invention. 従来の有機性廃水処理システムの全体ブロック図である。It is a whole block diagram of the conventional organic wastewater treatment system.

符号の説明Explanation of symbols

10 し尿受入槽
12、22 夾雑物除去装置
13、23 夾雑物脱水装置
20 浄化槽汚泥受入槽
30 生物学的脱窒素装置
31 固液分離装置
32 凝集分離装置
34 汚泥脱水装置
35 二次脱水装置
36 前処理脱水装置
37 二次脱水装置
38 分離液槽
54 固液分離汚泥
54a 返送汚泥
56 凝集分離汚泥
58 脱水汚泥
59 脱水分離液
60 繊維状物質
10 Human waste receiving tank 12, 22 Contaminant removing device 13, 23 Contaminating dewatering device 20 Septic tank sludge receiving tank 30 Biological denitrification device 31 Solid-liquid separation device 32 Coagulation separation device 34 Sludge dewatering device 35 Secondary dewatering device 36 Previous Treatment dehydrator 37 Secondary dehydrator 38 Separation liquid tank 54 Solid-liquid separation sludge 54a Return sludge 56 Aggregated separation sludge 58 Dehydrated sludge 59 Dehydrated separation liquid 60 Fibrous material

Claims (14)

有機性廃水を生物処理して得られた生物処理汚泥を脱水(以下、後処理脱水という)する有機性廃水の処理方法において、
前記後処理脱水にて発生した脱水汚泥を圧搾により二次脱水することを特徴とする有機性廃水の処理方法。
In a method for treating organic wastewater that dehydrates biological treatment sludge obtained by biological treatment of organic wastewater (hereinafter referred to as post-treatment dehydration),
A method for treating organic wastewater, wherein the dewatered sludge generated by the post-treatment dehydration is subjected to secondary dehydration by pressing.
有機性廃水を生物処理の前段にて脱水(以下、前処理脱水という)した後に脱水分離液を生物処理する有機性廃水の処理方法において、
前記前処理脱水にて発生した脱水汚泥を圧搾により二次脱水することを特徴とする有機性廃水の処理方法。
In a method for treating organic wastewater in which organic wastewater is dehydrated in the previous stage of biological treatment (hereinafter referred to as pretreatment dehydration) and then the dehydrated separated liquid is biologically treated.
A method for treating organic wastewater, wherein the dewatered sludge generated by the pretreatment dewatering is subjected to secondary dewatering by pressing.
前記二次脱水にて、前記脱水汚泥とともに繊維状物質を混合して二次脱水を行うことを特徴とする請求項1若しくは2記載の有機性廃水の処理方法。   The method for treating organic wastewater according to claim 1 or 2, wherein in the secondary dehydration, a fibrous material is mixed with the dewatered sludge to perform secondary dehydration. 前記繊維状物質が、天然由来の物質で且つ生分解性を有する物質であることを特徴とする請求項3記載の有機性廃水の処理方法。   4. The organic wastewater treatment method according to claim 3, wherein the fibrous substance is a naturally derived substance and a biodegradable substance. 前記有機性廃水に対して夾雑物除去を含む前処理を施した後に前記生物処理する有機性廃水の処理方法であって、
前記夾雑物除去により得られた繊維状夾雑物を前記二次脱水に供給することを特徴とする請求項1若しくは2記載の有機性廃水の処理方法。
A method for treating organic wastewater, wherein the biological wastewater is subjected to a pretreatment including removal of contaminants with respect to the organic wastewater,
The method for treating organic wastewater according to claim 1 or 2, wherein the fibrous impurities obtained by removing the impurities are supplied to the secondary dehydration.
溶解性の汚濁物質を多量に含む有機性廃水と、固形性の汚濁物質を多量に含む有機性廃水を処理する請求項1若しくは2記載の有機性廃水の処理方法であって、
前記有機性廃水に対して前処理が夫々行われ、該夫々の前処理の構成として、前記溶解性の汚濁物質を多量に含む有機性廃水については少なくとも夾雑物の除去を行い、前記固形性の汚濁物質を多量に含む有機性廃水については少なくとも前処理脱水を行う構成であり、
前記夾雑物除去にて得られた繊維状夾雑物の少なくとも一部を直接若しくは夾雑物脱水により脱水した後、前記前処理脱水にて発生した脱水汚泥とともに二次脱水に供給することを特徴とする有機性廃水の処理方法。
The method for treating organic wastewater according to claim 1 or 2, wherein organic wastewater containing a large amount of soluble pollutant and organic wastewater containing a large amount of solid pollutant are treated.
Each of the organic wastewaters is pretreated, and as a configuration of each of the pretreatments, at least impurities are removed from the organic wastewater containing a large amount of the soluble pollutant, and the solid waste Organic wastewater containing a large amount of pollutants is configured to perform at least pretreatment dehydration,
It is characterized in that at least a part of the fibrous contaminants obtained by the contaminant removal is dehydrated directly or by dehydration of contaminants, and then supplied to the secondary dehydration together with the dewatered sludge generated by the pretreatment dehydration. Organic wastewater treatment method.
必要に応じて夾雑物除去装置にて夾雑物除去した有機性廃水を生物処理する生物処理装置と、該生物処理装置にて発生した生物処理汚泥を後処理脱水する後処理脱水装置と、を備えた有機性廃水の処理システムにおいて、
前記後処理脱水装置にて発生した脱水汚泥を圧搾により二次脱水する二次脱水装置を設けたことを特徴とする有機性廃水の処理システム。
A biological treatment device that biologically treats organic wastewater from which contaminants have been removed by a contaminant removal device as needed, and a posttreatment dehydration device that posttreats and dehydrates biological treatment sludge generated in the biological treatment device. Organic wastewater treatment system
An organic wastewater treatment system comprising a secondary dewatering device for performing secondary dewatering by pressing the dewatered sludge generated in the post-treatment dewatering device.
必要に応じて夾雑物除去装置にて夾雑物除去した有機性廃水を前処理脱水する前処理脱水装置と、該前処理脱水装置にて得られた脱水分離液を生物処理する生物処理装置と、を備えた有機性廃水の処理システムにおいて、
前記前処理脱水装置にて発生した脱水汚泥を圧搾により二次脱水する二次脱水装置を設けたことを特徴とする有機性廃水の処理システム。
A pretreatment dewatering device for pretreating and dehydrating organic wastewater from which contaminants have been removed by a contaminant removal device, if necessary, a biological treatment device for biologically treating the dehydrated separation liquid obtained by the pretreatment dewatering device, In an organic wastewater treatment system equipped with
An organic wastewater treatment system comprising a secondary dewatering device for secondary dewatering of the dewatered sludge generated in the pretreatment dewatering device by pressing.
前記二次脱水装置が、外部より繊維状物質を供給する手段を備えることを特徴とする請求項7若しくは8記載の有機性廃水の処理システム。   The organic wastewater treatment system according to claim 7 or 8, wherein the secondary dewatering device includes means for supplying a fibrous substance from the outside. 前記繊維状物質供給手段が、天然由来の物質で且つ生分解性を有する物質を供給する手段であることを特徴とする請求項7若しくは8記載の有機性廃水の処理システム。   The organic wastewater treatment system according to claim 7 or 8, wherein the fibrous substance supply means is a means for supplying a naturally derived substance and a biodegradable substance. 溶解性の汚濁物質を多量に含む有機性廃水と、固形性の汚濁物質を多量に含む有機性廃水を処理する請求項7若しくは8記載の有機性廃水の処理システムであって、
前記溶解性の汚濁物質を多量に含む有機性廃水については、少なくとも前記夾雑物除去装置を含む前処理設備が設けられ、前記固形性の汚濁物質を多量に含む有機性廃水については、少なくとも前処理脱水装置を含む前処理設備が設けられ、前記夾雑物除去装置により得られた繊維状夾雑物を、直接若しくは夾雑物脱水装置を設けて脱水した後に前記二次脱水装置に供給するラインを設けたことを特徴とする有機性廃水の処理システム。
The organic wastewater treatment system according to claim 7 or 8, which treats organic wastewater containing a large amount of soluble pollutant and organic wastewater containing a large amount of solid pollutant.
For organic wastewater containing a large amount of the soluble pollutant, a pretreatment facility including at least the contaminant removal device is provided, and for organic wastewater containing a large amount of the solid pollutant, at least a pretreatment A pretreatment facility including a dehydrating device is provided, and a line is provided for supplying the secondary dehydrating device to the fibrous debris obtained by the contaminant removing device directly or after dehydrating by providing the contaminant dehydrating device. Organic wastewater treatment system characterized by that.
前記夾雑物脱水装置と前記二次脱水装置が一元化された構成であることを特徴とする請求項11記載の有機性廃水の処理システム。   12. The organic wastewater treatment system according to claim 11, wherein the contaminant dewatering device and the secondary dewatering device are integrated. 前記溶解性の汚濁物質を多量に含む有機性廃水の前処理設備と、前記固形性の汚濁物質を多量に含む有機性廃水の前処理設備を一元化することを特徴とする請求項11記載の有機性廃水の処理システム。   The organic wastewater pretreatment facility containing a large amount of the soluble pollutant and the organic wastewater pretreatment facility containing a large amount of the solid pollutant are unified. Wastewater treatment system. 前記固形性の汚濁物質を多量に含む有機性廃水の少なくとも一部を、前記生物処理装置へ直接導入することを特徴とする請求項11記載の有機性廃水の処理システム。
The organic wastewater treatment system according to claim 11, wherein at least a part of the organic wastewater containing a large amount of the solid pollutant is directly introduced into the biological treatment apparatus.
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