JP2001170614A - Organic waste water treating method and treating system - Google Patents

Organic waste water treating method and treating system

Info

Publication number
JP2001170614A
JP2001170614A JP35681799A JP35681799A JP2001170614A JP 2001170614 A JP2001170614 A JP 2001170614A JP 35681799 A JP35681799 A JP 35681799A JP 35681799 A JP35681799 A JP 35681799A JP 2001170614 A JP2001170614 A JP 2001170614A
Authority
JP
Japan
Prior art keywords
liquid
solid
ammonia
separated
organic wastewater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP35681799A
Other languages
Japanese (ja)
Inventor
Hiroshi Mizutani
洋 水谷
Takao Hashizume
隆夫 橋爪
Yuji Yasuda
雄二 保田
Kazuhiko Fujise
和彦 藤瀬
Taku Ike
卓 池
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP35681799A priority Critical patent/JP2001170614A/en
Publication of JP2001170614A publication Critical patent/JP2001170614A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Landscapes

  • Separation Using Semi-Permeable Membranes (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Treatment Of Sludge (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an organic waste water treating method by which the ammoniacal nitrogen contained in the waste water is recovered as resources. SOLUTION: The organic waste water is separated into a solid component and a separated liquid, and the nitrogen component contained in the separated liquid is treated by ammonia stripping. Further, the solid component of the organic waste after solid-liquid separation is methane-fermented. Meanwhile, an organic waste water treating system provided with a solid-liquid separator for separating the organic waste water into solid and liquid and an ammonia stripper for recovering aqueous ammonia by ammonia stripping from the liquid separated by the separater is used to treat the organic waste water.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、し尿、浄化槽汚
泥、下水汚泥、及び家畜糞尿などを広く含む有機性廃水
の処理方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating organic wastewater widely including night soil, septic tank sludge, sewage sludge, livestock manure and the like.

【0002】[0002]

【従来の技術】有機性廃水には、BOD成分やCOD成
分、窒素化合物、リン化合物などが含まれ、処理に際
し、これらを除去することが必要である。浄化槽汚泥等
の固形性廃棄物を多量に含む有機性廃水の処理法とし
て、固液分離、生物処理を含む様々な方法が知られてい
る。従来の有機性廃水の処理方法を、図3を用いて説明
する。難分解性有機物、高濃度窒素を含む有機性廃水
は、夾雑物除去装置1により夾雑物が除去された後、固
液分離装置2により固液分離される。固液分離後の廃水
の液体部分については、前処理膜分離装置3により前処
理され、その後、衛生処理、水質保全を主目的として、
生物処理設備8により硝化脱窒処理することによって、
BOD成分及び窒素化合物が除去される。この生物処理
設備8では、微生物による活性汚泥処理(活性汚泥法)
が行われる。この生物処理により、窒素分が窒素ガスと
して除去された廃水について、高度処理を行い、COD
成分リン化合物及び色度等を除去して処理水とする。
2. Description of the Related Art Organic wastewater contains a BOD component, a COD component, a nitrogen compound, a phosphorus compound and the like, and it is necessary to remove these during treatment. As a method for treating organic wastewater containing a large amount of solid waste such as septic tank sludge, various methods including solid-liquid separation and biological treatment are known. A conventional method for treating organic wastewater will be described with reference to FIG. Organic wastewater containing hardly decomposable organic matter and high-concentration nitrogen is subjected to solid-liquid separation by a solid-liquid separation device 2 after the foreign matter is removed by a foreign matter removal device 1. The liquid portion of the wastewater after the solid-liquid separation is pre-treated by the pre-treatment membrane separation device 3, and thereafter, for the main purpose of sanitary treatment and water quality
By performing the nitrification denitrification treatment by the biological treatment equipment 8,
BOD components and nitrogen compounds are removed. In this biological treatment facility 8, activated sludge treatment by microorganisms (activated sludge method)
Is performed. Advanced treatment is performed on wastewater from which nitrogen has been removed as nitrogen gas by this biological treatment, and COD
The component phosphorus compound and chromaticity are removed to obtain treated water.

【0003】例えば、特開平2−149399号には、
除渣後機械的な固液分離を行い、この分離液にさらに無
機凝集剤を添加して膜分離を行うことで徹底的な固液分
離を行い、後段の生物処理では膜分離液中に残留するア
ンモニア性窒素を除去する装置を開示している。後段の
生物処理では、活性汚泥処理設備や、表面に生物を付着
させたプラスチック、砂等のろ材又は、生物を包み込ん
だゲルなどによって生物を固定化した固定生物処理設備
により行う。
For example, JP-A-2-149399 discloses that
After solid removal, mechanical solid-liquid separation is performed.Thorough solid-liquid separation is performed by adding an inorganic coagulant to the separated liquid and performing membrane separation, and remaining in the membrane separation liquid in the later biological treatment. An apparatus for removing ammoniacal nitrogen is disclosed. The latter biological treatment is carried out by an activated sludge treatment facility, a fixed biological treatment facility in which organisms are immobilized by a filter medium such as plastic or sand having organisms adhered to the surface, or a gel enclosing organisms.

【0004】また、最近では各種廃棄物処理においても
リサイクルが行われており、有機性廃水処理において
も、単に無害化して廃棄するのみならず、エネルギー源
として回収するなど、再生資源として循環使用させるこ
と等が推進されている。例えば、炭素化合物に関して
は、メタン発酵やコンポスト処理によって、エネルギー
回収や再生物の循環利用が可能となっている。
In recent years, recycling has also been carried out in the treatment of various types of waste. In the treatment of organic wastewater, it is not only made harmless and disposed of, but also recycled as a renewable resource, such as recovery as an energy source. Things are being promoted. For example, regarding carbon compounds, energy recovery and recycle use of regenerated products are possible by methane fermentation and compost treatment.

【0005】[0005]

【発明が解決しようとする課題】従来の生物処理による
硝化脱窒では、有機性廃棄物中に高濃度に含まれる窒素
分について窒素ガスとして処理するだけで、資源として
の回収はなされない。従来の他の窒素処理法によって
も、有機性廃水の衛生的な処理のみを目的とし、液状有
機性廃水中に含まれる窒素等のリサイクルは考慮されて
いなかった。したがって、本発明は、有機性廃水中に含
まれる窒素化合物を、窒素肥料等のような資源として回
収できる効率的な有機性廃水の処理方法を提供すること
を目的とする。
In the conventional nitrification and denitrification by biological treatment, only nitrogen contained in a high concentration in organic waste is treated as nitrogen gas, but is not recovered as a resource. Even with other conventional nitrogen treatment methods, only the sanitary treatment of organic wastewater is intended, and recycling of nitrogen and the like contained in liquid organic wastewater is not considered. Therefore, an object of the present invention is to provide an efficient method for treating organic wastewater that can recover nitrogen compounds contained in the organic wastewater as resources such as nitrogen fertilizers.

【0006】[0006]

【課題を解決するための手段】上記目的達成のため、本
発明者らは、従来技術における膜分離液について、生物
処理の代わりにアンモニアストリッピングを行うことに
より、窒素分を高濃度のアンモニア水(NH3)として
回収する資源回収型有機性廃水の処理方法を開発した。
すなわち、本発明は、有機性廃水を固液分離して固形分
と分離液に分離し、該分離液に含まれる窒素分を、アン
モニアストリッピングにより処理することを特徴とする
有機性廃水の処理方法を提供する。本発明の方法によ
り、有機性廃水中に高濃度で含まれる窒素分を高濃度の
アンモニア水(NH3)として回収できるため、資源と
しての有効利用が図れる。具体的には、アンモニア水
は、硫酸と反応させ硫酸アンモニウムを製造すること等
により、肥料等に利用することができる。一方、アンモ
ニアストリッピングにより放流基準を満足する処理水を
得ることができるため、有機性廃水の処理方法としても
有効なものである。
Means for Solving the Problems In order to achieve the above object, the present inventors carried out ammonia stripping instead of biological treatment on a membrane separation solution in the prior art, thereby reducing the nitrogen content to a high concentration of aqueous ammonia. We have developed a resource recovery type organic wastewater treatment method to recover as (NH 3 ).
That is, the present invention provides a method for treating organic wastewater, which comprises solid-liquid separation of the organic wastewater into solids and a separated liquid, and treating the nitrogen contained in the separated liquid by ammonia stripping. Provide a way. According to the method of the present invention, the nitrogen content contained in the organic wastewater at a high concentration can be recovered as a high-concentration aqueous ammonia (NH 3 ), so that it can be effectively used as a resource. Specifically, aqueous ammonia can be used as a fertilizer by reacting with sulfuric acid to produce ammonium sulfate. On the other hand, because treated water satisfying the discharge standard can be obtained by ammonia stripping, it is also effective as a method for treating organic wastewater.

【0007】アンモニアストリッピング処理は、上記分
離液を前処理膜分離した後に行うことが好ましく、この
場合は、上記前処理膜分離により得られた濃縮液を上記
固液分離の前段に返送するのが好ましい。
[0007] The ammonia stripping treatment is preferably performed after the separation liquid is subjected to pretreatment membrane separation. In this case, the concentrated liquid obtained by the pretreatment membrane separation is returned to the preceding stage of the solid-liquid separation. Is preferred.

【0008】また、本発明の有機性廃水の処理方法で
は、固液分離後の有機性廃水の固形分(SS成分)であ
る脱水汚泥をメタン発酵、堆肥化等によりリサイクル処
理することができる。これによって、有機性排水中の窒
素分についてはアンモニアストリッピングによりアンモ
ニア水として回収し、炭素分についてはメタン発酵、堆
肥化により回収できるため、資源をより効率的に利用す
ることが可能となる。
In the method for treating organic wastewater of the present invention, dewatered sludge, which is the solid content (SS component) of the organic wastewater after solid-liquid separation, can be recycled by methane fermentation, composting, or the like. Thereby, the nitrogen content in the organic wastewater can be recovered as ammonia water by ammonia stripping, and the carbon content can be recovered by methane fermentation and composting, so that resources can be used more efficiently.

【0009】また、本発明は、有機性廃水を固液分離す
るための固液分離装置と、固液分離装置によって分離さ
れた分離液からアンモニアストリッピングによりアンモ
ニア水を回収するためのアンモニアストリッパとを備え
る有機性廃水の処理システムを提供する。
The present invention also provides a solid-liquid separator for solid-liquid separation of organic wastewater, and an ammonia stripper for collecting ammonia water from the separated liquid separated by the solid-liquid separator by ammonia stripping. An organic wastewater treatment system comprising:

【0010】本発明の適用対象としては、し尿・浄化槽
汚泥及び家畜糞尿等の有機性廃水が挙げられる。本発明
の態様として、例えば、有機性廃水を除渣した後、遠心
分離等の機械的な固液分離を行って、さらに凝集剤を添
加後膜分離し、この分離液からアンモニアストリッピン
グにより高濃度NH3水を回収すると共に、放流基準を満
足する処理水を得ることを特徴とする有機性廃水の処理
方法や、この処理方法において、遠心分離等機械的な固
液分離より発生する脱水汚泥をメタン発酵、堆肥化等に
よりリサイクル処理する方法があげられるが、これらに
限定されない。
The present invention is applicable to organic wastewater such as night soil and septic tank sludge and livestock manure. As an embodiment of the present invention, for example, after removing organic wastewater, mechanical solid-liquid separation such as centrifugation is performed, a coagulant is added, membrane separation is performed, and ammonia separation is performed on the separated liquid by ammonia stripping. A method for treating organic wastewater, characterized in that it collects NH 3 water and obtains treated water that satisfies the discharge standard, and in this treatment method, dewatered sludge generated by mechanical solid-liquid separation such as centrifugation. Methane fermentation, composting, and the like, for example, but not limited thereto.

【0011】本発明の有機性廃水の処理方法を実施する
ためのシステムとしては、例えば、有機性廃水中の夾雑
物を除去するため夾雑物除去装置と、夾雑物除去装置に
続いた遠心分離装置やベルトプレスなどの固液分離装置
と、固液分離装置により分離された分離液を処理するた
めの精密濾過膜又は限外濾過膜等を用いた前処理膜分離
装置と、前処理後の分離液をアンモニアストリッピング
するためのアンモニアストリッパ(例えば蒸留塔)と、
アンモニアストリッピングにより窒素分が除去された分
離液についてCOD成分、リン化合物及び色度等を除去
して無害化し、放水基準を満たす処理水とする高度処理
装置とを備えるものが挙げられる。このシステムにおい
ては、各装置は、ラインで連結され、夾雑物除去装置か
らは、除去された紙、ビニール等の夾雑物排出ラインが
備えられ、アンモニアストリッパには、得られたアンモ
ニア水を回収するためのラインが備えられている。前処
理膜分離装置には、分離された汚泥を固液分離装置の前
段に返送するためのラインを備えるのが好ましく、固液
分離装置において分離された脱水汚泥はその後の処理に
供すべく、任意の設備へ搬送するラインを備えてもよ
い。
The system for carrying out the method for treating organic wastewater of the present invention includes, for example, a contaminant removing device for removing contaminants in organic wastewater, and a centrifugal separator following the contaminant removing device. Separation device using a solid-liquid separation device such as a press or a belt press, a microfiltration membrane or an ultrafiltration membrane for treating the separated liquid separated by the solid-liquid separation device, and separation after the pretreatment An ammonia stripper (for example, a distillation column) for stripping the liquid with ammonia;
The separation liquid from which the nitrogen content has been removed by ammonia stripping is detoxified by removing the COD component, the phosphorus compound, the chromaticity, and the like, and an advanced treatment apparatus is provided which uses treated water that satisfies a water discharge standard. In this system, each device is connected by a line, and a contaminant removal device is provided with a contaminant discharge line for removed paper, vinyl, etc., and an ammonia stripper collects the obtained ammonia water. Line is provided. The pretreatment membrane separation device preferably includes a line for returning the separated sludge to a stage preceding the solid-liquid separation device.The dewatered sludge separated in the solid-liquid separation device is optionally subjected to a subsequent treatment. May be provided.

【0012】本発明の方法を実施するためのこのような
システムの変形例として、脱水汚泥を処理する装置を備
えたものが挙げられる。例えば、固液分離装置から脱水
汚泥を搬出するラインに続いて、メタン発酵を行い、メ
タンガスを回収するメタン発酵装置と、その後段に堆肥
化装置とを備えるものである。この場合、メタン発酵装
置と堆肥化装置との間に固液分離装置を設け、分離液を
前処理膜分離装置もしくはアンモニアストリッパに直接
導入するようにしてもよい。
A variant of such a system for carrying out the method according to the invention is provided with a device for treating dewatered sludge. For example, following a line for carrying out dewatered sludge from a solid-liquid separation device, a methane fermentation device that performs methane fermentation and collects methane gas is provided, and a composting device is provided at a subsequent stage. In this case, a solid-liquid separation device may be provided between the methane fermentation device and the composting device, and the separated liquid may be directly introduced into the pretreatment membrane separation device or the ammonia stripper.

【0013】[0013]

【発明の実施の形態】以下、本発明に係る有機性廃棄物
の処理方法について、添付図面を参照しながら、その具
体的な実施形態を詳細に説明する。図1は実施の形態
(その1)、図2は実施の形態(その2)を概略的に示
すものである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of a method for treating organic waste according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 schematically shows an embodiment (No. 1), and FIG. 2 schematically shows an embodiment (No. 2).

【0014】実施の形態(その1) 従来の廃水処理システムにおける硝化脱窒処理は、生物
処理設備により硝化脱窒を行っていたが、本実施の形態
では、有機性廃水中に含まれる窒素分を回収すべく、生
物処理にかえてアンモニアストリッピングを行い、窒素
分をアンモニア水として回収する。まず、有機性廃棄物
は、夾雑物除去装置1において、紙、ビニール等の夾雑
物を除去された後、固液分離装置2により分離液と脱水
汚泥とに分離される。ここでBODや有機性窒素分(Org
-N)等は固形物に起因するものが多い為、脱水汚泥とし
て除去されるが、アンモニア性窒素は溶解性なので分離
液中に残留する。脱水汚泥は任意の方法によって処理す
ることができ、脱水汚泥の処理方法は特に限定されな
い。凝集剤を添加された分離液を前処理膜分離装置3に
より処理した後、アンモニアストリッパ4においてアン
モニアストリッピングすることにより、アンモニア性窒
素がアンモニア水として回収される。
Embodiment (Part 1) In the conventional nitrification and denitrification treatment in a wastewater treatment system, nitrification and denitrification are performed by a biological treatment facility. However, in the present embodiment, the nitrogen content contained in organic wastewater is reduced. The ammonia is stripped in place of biological treatment to recover nitrogen, and nitrogen is recovered as ammonia water. First, the organic waste is separated into a separated liquid and a dewatered sludge by the solid-liquid separation device 2 after removing impurities such as paper and vinyl in the impurity removal device 1. Here, BOD and organic nitrogen (Org
-N) and the like are mainly caused by solid matter, and thus are removed as dewatered sludge. However, ammonia nitrogen remains in the separated liquid because it is soluble. The dewatered sludge can be treated by any method, and the treatment method of the dewatered sludge is not particularly limited. After the separation liquid to which the flocculant has been added is treated by the pretreatment membrane separation device 3, ammonia stripping is performed by the ammonia stripper 4, whereby ammonia nitrogen is recovered as ammonia water.

【0015】アンモニアストリッピングでは、窒素化合
物をアンモニアの形態のままで回収する。アンモニアの
回収は、通常10〜20%のアンモニア水として回収さ
れ、回収したアンモニアは、中和剤として使用したり、
硫酸と混ぜて硫安等の肥料成分として使用できる。この
時、カプロラクタム製造工程、青酸製造工程、メタクリ
ル酸製造工程、酸化チタン生成廃液などの化学プラント
等から発生する廃硫酸の利用も考えられる。つまり、回
収したアンモニアと化学プラントにて発生する廃硫酸と
を反応させ、有価物である硫酸アンモニウムを製造する
こともできる。また、回収されたアンモニア水を触媒に
よる処理で窒素化して窒素ガス(N2)に変換して、大
気中に放出してもよい。
In the ammonia stripping, the nitrogen compound is recovered in the form of ammonia. The recovery of ammonia is usually recovered as 10 to 20% ammonia water, and the recovered ammonia can be used as a neutralizing agent,
It can be used as a fertilizer component such as ammonium sulfate by mixing with sulfuric acid. At this time, use of waste sulfuric acid generated from a chemical plant such as a caprolactam production step, a hydrocyanic acid production step, a methacrylic acid production step, a titanium oxide production waste liquid, and the like may be considered. That is, by reacting the recovered ammonia with the waste sulfuric acid generated in the chemical plant, it is possible to produce ammonium sulfate, which is a valuable resource. Further, the recovered ammonia water may be nitrogenated by a treatment with a catalyst, converted into nitrogen gas (N 2 ), and released into the atmosphere.

【0016】ここで、アンモニアストリッピング処理
は、例えば、図4に示すような蒸留塔によって実施でき
る。この蒸留塔(アンモニアストリッパ)では、複数段
に亘る棚状の段20に高温の水蒸気を下部から通し、上
部から導入される有機性廃水(原液)と接触させる。こ
の接触により、塔の下部からは排水が回収され、上部か
らはアンモニアを含む水蒸気が回収できる。この水蒸気
を凝集させることによって、アンモニア水が得られる。
アンモニアストリッピング自体は、電力設備の排水や産
業廃棄物の廃水のように無機質系の廃水処理にも利用で
きる。本発明では、例えば、し尿や下水、家畜糞尿など
有機性の窒素含有廃水の処理過程にアンモニアストリッ
ピングを用いる。上記アンモニアストリッピングを経た
廃水は廃液側に流れるが、前段の固液分離処理により炭
素分は脱水汚泥として除去されているため、高度処理を
経て処理水とすることができる。高度処理としては、例
えば、オゾン処理装置を用いたCOD成分、リン化合物
及び色度等の除去などが行われる。
Here, the ammonia stripping treatment can be carried out, for example, by a distillation column as shown in FIG. In this distillation column (ammonia stripper), high-temperature steam is passed through a plurality of stages 20 in a shelf shape from below, and is brought into contact with organic wastewater (stock solution) introduced from above. By this contact, wastewater is recovered from the lower part of the tower, and water vapor containing ammonia can be recovered from the upper part. By aggregating this water vapor, ammonia water is obtained.
Ammonia stripping itself can also be used for treating inorganic wastewater, such as wastewater from power equipment and wastewater from industrial waste. In the present invention, for example, ammonia stripping is used in the process of treating organic nitrogen-containing wastewater such as night soil, sewage, and livestock manure. The wastewater that has passed through the ammonia stripping flows to the waste liquid side, but since the carbon content has been removed as dehydrated sludge by the solid-liquid separation treatment in the previous stage, the wastewater can be converted into treated water through advanced treatment. As the advanced treatment, for example, removal of COD components, phosphorus compounds, chromaticity, and the like using an ozone treatment device are performed.

【0017】実施の形態(その2) 本実施態様は、上記実施の形態において、固液分離装置
2から生じる脱水汚泥の処理について、メタン発酵及び
堆肥化により、炭素分の回収を図るものである。固液分
離装置2により分離された脱水汚泥は、メタン発酵装置
5において炭素分をメタンガスとして回収する。このメ
タンガスは、熱源として利用できる。例えば、アンモニ
アストリッピングは温度が高いほどアンモニア回収効率
が向上するため、回収されたメタンガスはボイラを介し
てアンモニアストリッピング用の熱源とすることができ
る。これによりシステム全体として有効に熱エネルギー
を利用できる。本実施態様では、メタン発酵後の残渣を
堆肥化(コンポスト化)することができ、窒素分、炭素
分共に有効な資源利用が図れる。なお、メタン発酵装置
5と堆肥化装置7との間に、固液分離装置6を設けて、
液体部分の除去を堆肥化処理の前に行うことが望まし
く、除去された液体部分は炭素分をほとんど含まないこ
とから、アンモニアストリッパ4へ導入して処理するこ
とが可能である。
Embodiment (No. 2) In this embodiment, in the above-described embodiment, regarding the treatment of the dewatered sludge generated from the solid-liquid separation device 2, the carbon content is recovered by methane fermentation and composting. . The dewatered sludge separated by the solid-liquid separation device 2 recovers carbon as methane gas in the methane fermentation device 5. This methane gas can be used as a heat source. For example, in ammonia stripping, the higher the temperature, the higher the ammonia recovery efficiency, and thus the recovered methane gas can be used as a heat source for ammonia stripping via a boiler. Thereby, heat energy can be effectively used as the whole system. In this embodiment, the residue after methane fermentation can be composted (composted), and effective resource utilization can be achieved for both nitrogen and carbon. In addition, a solid-liquid separation device 6 is provided between the methane fermentation device 5 and the composting device 7,
It is desirable to remove the liquid portion before the composting process, and since the removed liquid portion contains almost no carbon content, it can be introduced into the ammonia stripper 4 for processing.

【0018】[0018]

【発明の効果】以上説明したように、本発明に係る処理
方法によれば、有機性廃水中に含まれるアンモニア性の
窒素は、前処理の固液分離において固形物を徹底的に除
去しても、溶解性であるため分離液中に残留するが、分
離液をアンモニアストリッピングすることで窒素のリサ
イクル利用が可能な高濃度NH3水として回収できると共
に、環境汚染のおそれのない従来技術と同等の処理水を
得ることができる。さらに、前処理の固液分離で生じる
固形分中の炭素分について、メタン発酵を行うことによ
り、有機性廃水から窒素分に加え、炭素分を回収できる
ため、資源の回収が効率的に行われるとともに、エネル
ギー的にも無駄が少なく経済的な廃水処理を行うことが
できる。
As described above, according to the treatment method of the present invention, the ammonia nitrogen contained in the organic wastewater is thoroughly removed in the solid-liquid separation in the pretreatment. However, since it is soluble, it remains in the separated solution, but it can be recovered as high-concentration NH 3 water that can be recycled for nitrogen by stripping the separated solution with ammonia, and it is compatible with the conventional technology that does not cause environmental pollution. Equivalent treated water can be obtained. Furthermore, by performing methane fermentation on the carbon content in the solid content generated by the solid-liquid separation in the pretreatment, the carbon content can be recovered from the organic wastewater in addition to the nitrogen content, so that the resources can be efficiently recovered. At the same time, wastewater treatment can be performed economically with little waste in terms of energy.

【図面の簡単な説明】[Brief description of the drawings]

【図1】図1は、本発明の実施の態様(その1)の工程
を模式的に示す図である。
FIG. 1 is a diagram schematically showing the steps of an embodiment (part 1) of the present invention.

【図2】図2は、本発明の実施の態様(その2)の工程
を模式的に示す図である。
FIG. 2 is a diagram schematically showing a process of an embodiment (part 2) of the present invention.

【図3】図3は、従来用いられていた有機性廃水の処理
工程を模式的に示す図である。
FIG. 3 is a diagram schematically showing a process of treating organic wastewater which has been conventionally used.

【図4】図4は、本発明で用いることのできるアンモニ
アストリッパの概略を示す構成図である。
FIG. 4 is a configuration diagram schematically showing an ammonia stripper that can be used in the present invention.

【符号の説明】[Explanation of symbols]

1 夾雑物除去装置 2、6 固液分離装置 3 前処理膜分離装置 4 アンモニアストリッパ 5 メタン発酵装置 7 堆肥化装置 20 棚段 21 液降下部 22 棚段支持部 23 インレットウエア 24 アウトレットウエア 25 気液接触部 DESCRIPTION OF SYMBOLS 1 Contaminant removal apparatus 2, 6 Solid-liquid separation apparatus 3 Pretreatment membrane separation apparatus 4 Ammonia stripper 5 Methane fermentation apparatus 7 Composting apparatus 20 Shelf 21 Liquid drop-down part 22 Shelf support 23 Inlet wear 24 Outlet wear 25 Gas-liquid Contact part

───────────────────────────────────────────────────── フロントページの続き (72)発明者 保田 雄二 神奈川県横浜市中区錦町12番地 三菱重工 業株式会社横浜製作所内 (72)発明者 藤瀬 和彦 神奈川県横浜市中区錦町12番地 三菱重工 業株式会社横浜製作所内 (72)発明者 池 卓 神奈川県横浜市中区錦町12番地 三菱重工 業株式会社横浜製作所内 Fターム(参考) 4D006 GA06 GA07 KA03 KA72 KB13 KB17 KB24 KD08 PB08 PC61 4D015 BA03 CA03 EA37 FA17 FA19 FA25 FA26 FA30 4D034 AA13 BA01 CA12 4D059 AA01 AA02 BA12 BA17 BD25 BE13 BE42 BE55 CC01 4D062 BA03 CA03 EA37 FA17 FA19 FA25 FA26 FA30  ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yuji Yasuda 12 Nishiki-cho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Inside Mitsubishi Heavy Industries, Ltd. (72) Inventor Kazuhiko Fujise 12 Nishiki-cho, Naka-ku, Yokohama-shi, Kanagawa Inside the Yokohama Works Co., Ltd. (72) Inventor Taku Ike 12 Nishikicho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Mitsubishi Heavy Industries, Ltd.Yokohama Works F-term (reference) FA19 FA25 FA26 FA30 4D034 AA13 BA01 CA12 4D059 AA01 AA02 BA12 BA17 BD25 BE13 BE42 BE55 CC01 4D062 BA03 CA03 EA37 FA17 FA19 FA25 FA26 FA30

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 有機性廃水を重力もしくは機械的に固液
分離して固形分と分離液に分離し、該分離液に含まれる
窒素分を、アンモニアストリッピングにより処理するこ
とを特徴とする有機性廃水の処理方法。
An organic wastewater is characterized in that organic wastewater is separated by gravity or mechanically into a solid and a liquid by solid-liquid separation, and the nitrogen contained in the separated liquid is treated by ammonia stripping. Wastewater treatment method.
【請求項2】 固液分離後の有機性廃棄物の固形分をメ
タン発酵することを更に含む請求項1に記載の有機性廃
水の処理方法。
2. The method for treating organic wastewater according to claim 1, further comprising methane fermenting the solid content of the organic waste after solid-liquid separation.
【請求項3】 上記分離液を前処理膜分離した後にアン
モニアストリッピング処理を行う請求項1又は2に記載
の有機性廃水の処理方法。
3. The method for treating organic wastewater according to claim 1, wherein an ammonia stripping treatment is performed after the separation liquid is subjected to pretreatment membrane separation.
【請求項4】 上記前処理膜分離により得られた濃縮液
を上記固液分離の前段に返送する請求項3に記載の有機
性廃水の処理方法。
4. The method for treating organic wastewater according to claim 3, wherein the concentrated liquid obtained by the pretreatment membrane separation is returned to a stage preceding the solid-liquid separation.
【請求項5】 有機性廃水を固液分離するための固液分
離装置と、固液分離装置によって分離された分離液から
アンモニアストリッピングによりアンモニア水を回収す
るためのアンモニアストリッパとを備える有機性廃水の
処理システム。
5. An organic apparatus comprising: a solid-liquid separator for solid-liquid separation of organic wastewater; and an ammonia stripper for recovering ammonia water from the separated liquid separated by the solid-liquid separator by ammonia stripping. Wastewater treatment system.
JP35681799A 1999-12-16 1999-12-16 Organic waste water treating method and treating system Pending JP2001170614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35681799A JP2001170614A (en) 1999-12-16 1999-12-16 Organic waste water treating method and treating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35681799A JP2001170614A (en) 1999-12-16 1999-12-16 Organic waste water treating method and treating system

Publications (1)

Publication Number Publication Date
JP2001170614A true JP2001170614A (en) 2001-06-26

Family

ID=18450932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP35681799A Pending JP2001170614A (en) 1999-12-16 1999-12-16 Organic waste water treating method and treating system

Country Status (1)

Country Link
JP (1) JP2001170614A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006150158A (en) * 2004-11-25 2006-06-15 Okawara Mfg Co Ltd Method for treating digestive liquid in methane fermentation treatment system for organic waste such as livestock waste and apparatus therefor
JP2007524501A (en) * 2003-06-24 2007-08-30 カロロ エンジニアーズ, ピー・シー Wastewater treatment method and wastewater treatment system
CN103723862A (en) * 2013-12-31 2014-04-16 李�杰 Production method of tap water
JP2016013537A (en) * 2014-06-09 2016-01-28 三菱レイヨン株式会社 Method and apparatus for treating humin-containing waste water
KR20180089048A (en) * 2017-01-31 2018-08-08 고등기술연구원연구조합 Method for recycling and combined treatment of waste resources of city

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03238098A (en) * 1990-02-14 1991-10-23 Ebara Infilco Co Ltd Treatment of raw sewage liquor
JPH0568993A (en) * 1991-09-10 1993-03-23 Mitsubishi Heavy Ind Ltd Treatment of sludge of purifying tank
JPH09201599A (en) * 1996-01-26 1997-08-05 Kubota Corp Method for recovering useful substance from organic waste and utilizing the same as resources

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03238098A (en) * 1990-02-14 1991-10-23 Ebara Infilco Co Ltd Treatment of raw sewage liquor
JPH0568993A (en) * 1991-09-10 1993-03-23 Mitsubishi Heavy Ind Ltd Treatment of sludge of purifying tank
JPH09201599A (en) * 1996-01-26 1997-08-05 Kubota Corp Method for recovering useful substance from organic waste and utilizing the same as resources

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007524501A (en) * 2003-06-24 2007-08-30 カロロ エンジニアーズ, ピー・シー Wastewater treatment method and wastewater treatment system
JP2006150158A (en) * 2004-11-25 2006-06-15 Okawara Mfg Co Ltd Method for treating digestive liquid in methane fermentation treatment system for organic waste such as livestock waste and apparatus therefor
CN103723862A (en) * 2013-12-31 2014-04-16 李�杰 Production method of tap water
CN103723862B (en) * 2013-12-31 2015-08-05 李�杰 A kind of production method of tap water
JP2016013537A (en) * 2014-06-09 2016-01-28 三菱レイヨン株式会社 Method and apparatus for treating humin-containing waste water
KR20180089048A (en) * 2017-01-31 2018-08-08 고등기술연구원연구조합 Method for recycling and combined treatment of waste resources of city
KR101894049B1 (en) * 2017-01-31 2018-08-31 고등기술연구원연구조합 Method for recycling and combined treatment of waste resources of city

Similar Documents

Publication Publication Date Title
US7604740B2 (en) Waste activated sludge stripping to remove internal phosphorus
JP3452439B2 (en) Recovery and recycling of useful substances from organic waste
JP2002273489A (en) Treatment method of liquid organic waste and system for the same
CN111661979B (en) Leachate recycling method and device
EP0218066B1 (en) Wastewater purification process
CN105461102A (en) Treatment method of smoke washing wastewater
CN104528989B (en) A kind of high ammonia-nitrogen wastewater processes ammonia recovery system
CN105130051A (en) Process for treating landfill leachate by using ammonia nitrogen separating membrane and special equipment for process
JP3653427B2 (en) Tofu drainage treatment method and equipment
JP2001170614A (en) Organic waste water treating method and treating system
CN100348519C (en) Process for treating coking waste water containing phenol and cyanogen by physical chemistry method and special device therefor
JP3600815B2 (en) Anaerobic fermentation system for organic waste
JP2000263097A (en) Treatment of livestock excreta
JP2002079299A (en) Method for treating ammonia-containing waste
JP2003088833A (en) Organic waste treatment equipment
CN204958599U (en) Professional equipment of ammonia nitrogen diffusion barrier refuse disposal filtration liquid technology
CN212050969U (en) Wet garbage treatment system
JP2004024929A (en) Methane fermentation method and system for the same
JP3364018B2 (en) Wastewater treatment method
KR100352243B1 (en) A Treatment Method for Livestock Wastewater
CN1224575C (en) Method for handling industrial waste water by using aeration cooperated with ultrasonic treatment.
JP2002224645A (en) Method of high concentration methane fermentation
JP2001137888A (en) Method for treating organic waste water
JP2009195783A (en) Organic wastewater treatment method
JP4505878B2 (en) Treatment method of organic sludge

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040224

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040426

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20050118

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050322

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20050906