JP2003305500A - Method for treating organic sludge - Google Patents
Method for treating organic sludgeInfo
- Publication number
- JP2003305500A JP2003305500A JP2002112488A JP2002112488A JP2003305500A JP 2003305500 A JP2003305500 A JP 2003305500A JP 2002112488 A JP2002112488 A JP 2002112488A JP 2002112488 A JP2002112488 A JP 2002112488A JP 2003305500 A JP2003305500 A JP 2003305500A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- organic sludge
- treatment
- treating
- microorganisms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Landscapes
- Treatment Of Sludge (AREA)
- Fertilizers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、家庭の浄化槽・工
場等の廃水処理設備・下水処理場等から排出される有機
性汚泥の処理方法及び該方法を実施するための装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating organic sludge discharged from a domestic septic tank, a wastewater treatment facility such as a factory, a sewage treatment plant, and an apparatus for carrying out the method.
【０００２】[0002]
【従来の技術】従来、有機性汚泥の嫌気性消化処理方法
としては、下水処理場における１段又は２段式直接嫌気
性消化法が知られている。この直接嫌気性消化処理方法
は、汚泥を半分程度に減量化できる、燃料ガスであ
るメタンが得られる、などといった利点を有するもので
ある。しかし、この直接嫌気性消化方法には、消化速
度が遅い、有機物分解率が悪い、大量の汚泥が発生
するなどといった問題点があった。2. Description of the Related Art Conventionally, as a method for anaerobic digestion of organic sludge, a one-stage or two-stage direct anaerobic digestion method in a sewage treatment plant has been known. This direct anaerobic digestion treatment method has advantages such as being able to reduce the amount of sludge to about half and obtaining methane as a fuel gas. However, this direct anaerobic digestion method has problems such as a slow digestion rate, a low organic matter decomposition rate, and generation of a large amount of sludge.
【０００３】これらの問題点を解消するために、「消化
汚泥を主体とする混合液を嫌気性消化リアクターから引
き抜き循環・返送する過程で熱処理し、該混合液の一部
をリアクターから引き抜き循環・返送する系統に汚泥を
濃縮及び／あるいは固液分離する手段を設け、該混合液
を引き抜き循環・返送する系統からさらにその一部の混
合液を分岐し、１２０℃程度の高温に加熱して混合液を
殺菌し、不活性化して嫌気性消化リアクターに再投入す
るという方法」が提案されている（特公平１０−０８５
７８４号公報）。しかし、この方法では、大量の汚泥を
１２０℃程度にまで加温しなければならず、圧力容器も
必要でコストもかかり、エネルギーのロスが大きい等と
いった問題があった。In order to solve these problems, "heat treatment is performed in the process of extracting and circulating / returning a mixed solution mainly composed of digested sludge from an anaerobic digestion reactor, and a part of the mixed solution is withdrawn and circulated from the reactor. The system for returning the sludge is provided with means for concentrating and / or solid-liquid separating the sludge, and a part of the mixed solution is further branched from the system for withdrawing, circulating and returning the mixed solution, and the mixture is heated to a high temperature of about 120 ° C. for mixing. The method of sterilizing the liquid, inactivating it and re-injecting it into the anaerobic digestion reactor "has been proposed (Japanese Patent Publication No. 10-085).
No. 784). However, this method has a problem in that a large amount of sludge must be heated up to about 120 ° C., a pressure vessel is also required, cost is increased, and energy loss is large.
【０００４】一方、「有機性廃液を、好気性微生物を含
む活性汚泥の存在下に好気性処理する方法において、被
処理液中のＢＯＤの同化により増殖する汚泥量よりも多
い量の活性汚泥を好気性処理系から引抜き、引抜汚泥を
オゾン処理したのち前記好気性処理系に導入することを
特徴とする有機性廃液の好気性処理方法」が提案されて
いる（特許第2973761号）が、オゾン発生のためのエネ
ルギーが大量に必要で、温室効果ガス発生やコスト増と
なる等の問題点がある上、オゾン処理した活性汚泥を好
気性処理するため、エネルギー回収の困難性があった。On the other hand, in the method of aerobically treating organic waste liquid in the presence of activated sludge containing aerobic microorganisms, an amount of activated sludge larger than the amount of sludge grown by assimilation of BOD in the treated liquid is used. A method for aerobic treatment of an organic waste liquid, which is characterized in that it is extracted from an aerobic treatment system, and then the extracted sludge is subjected to ozone treatment and then introduced into the aerobic treatment system (Patent No. 2973761) is proposed. There is a problem that a large amount of energy is required for the generation, the greenhouse gas is generated, and the cost is increased. Moreover, since the ozone-treated activated sludge is aerobically treated, it is difficult to recover the energy.
【０００５】また、「有機性廃水を好気性条件下で処理
するための活性汚泥処理装置において、余剰汚泥を５５
℃より高い温度で好熱菌による微生物処理で可溶化し、
前記可溶化処理装置で可溶化された処理液を曝気処理装
置に返送する返送経路とを設けた活性汚泥処理装置」が
提案されているが（特許第3048889号）、この方法では
可溶化された処理液を好気条件の曝気処理装置でさらに
無機化するため、二酸化炭素と水が得られるだけであ
り、また後段の曝気処理がエネルギー消費型処理でコス
ト増となり、エネルギー回収も難しい等の問題点があっ
た。In addition, "In an activated sludge treatment apparatus for treating organic wastewater under aerobic conditions, excess sludge is removed by 55%.
Solubilized by microbial treatment with thermophile at a temperature higher than ℃,
An activated sludge treatment device provided with a return path for returning the treatment liquid solubilized by the solubilization treatment device to the aeration treatment device has been proposed (Patent No. 3048889), but solubilized by this method. Since the treatment liquid is further mineralized by the aeration treatment device under aerobic conditions, only carbon dioxide and water can be obtained, and the subsequent aeration treatment increases the cost due to energy-consuming treatment, and energy recovery is difficult. There was a point.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、上記従来技
術の実情に鑑みなされたものであって、有機性汚泥の処
理方法において、有機性汚泥中の有機物を迅速に高い分
解率で分解・消化処理することができると共にメタンや
肥料を効率的に製造することができる、工業的に有利な
有機性汚泥の処理方法および装置を提供することを目的
とする。DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and in the method for treating organic sludge, the organic matter in the organic sludge is rapidly decomposed at a high decomposition rate. An object of the present invention is to provide an industrially advantageous method and apparatus for treating organic sludge, which can be digested and efficiently produce methane and fertilizers.
【０００７】[0007]
【発明を解決するための手段】本発明者は、前記課題を
解決すべく鋭意研究を重ねた結果、本発明を完成するに
至った。即ち、本発明によれば、以下の発明が提供され
る。
（１）有機性汚泥の処理方法において、嫌気性処理及び
／又は好気性処理の前に該有機性汚泥を予め回転円板法
により前分解処理することを特徴とする有機性汚泥の処
理方法。
（２）回転円板法が、好熱性分解微生物を利用したもの
であることを特徴とする上記（１）に記載の有機性汚泥
の処理方法。
（３）回転円板法が、好熱性分解微生物の付着・増殖に
適した条件に設定されていることを特徴とする上記
（１）又は（２）に記載の有機性汚泥の処理方法。
（４）有機性汚泥の処理方法において、（Ｉ）好熱性分
解微生物を利用した回転円板法により有機性汚泥を前分
解する工程、（II）該前分解工程で得られた分解物を酸
発酵性微生物及び／又はメタン発酵性微生物を含む嫌気
性消化汚泥を用いて処理することを特徴とする有機性汚
泥の処理方法。
（５）（II）の工程で得られるメタンを含有する気相部
を燃料とすることを特徴とする上記（４）も記載の有機
性汚泥の処理方法。
（６）（II）の工程で得られる処理汚泥を（I）の工程
に循環し再処理することを特徴とする上記（４）又は
（５）に記載の有機性汚泥の処理方法。
（７）（II）の工程で得られる処理汚泥を直接又は固液
分離し肥料及び／又は肥料の原料として利用することを
特徴とする上記（４）乃至（６）何れかに記載の有機性
汚泥の処理方法。
（８）有機性汚泥の処理方法において、（Ｉ）好熱性分
解微生物を利用した回転円板法により有機性汚泥を前分
解する工程、（II）該前分解工程で得られた分解物を好
気性分解微生物を含む活性汚泥を用いて処理することを
特徴とする有機性汚泥の処理方法。
（９）（II）の工程で得られる処理汚泥を（I）の工程
に循環し再処理することを特徴とする上記（８）に記載
の有機性汚泥の処理方法。
（１０）（II）の工程で得られる処理汚泥を直接又は固
液分離し肥料及び／又は肥料の原料として利用すること
を特徴とする上記（９）に記載の有機性汚泥の処理方
法。
（１１）有機性汚泥の処理装置であって、回転円板体か
らなる有機性汚泥の前分解処理装置を備えたことを特徴
とする有機性汚泥の処理装置。
（１２）回転円板体が、好熱性分解微生物を含有するこ
とを特徴とする上記（１１）に記載の有機性汚泥の処理
装置。
（１３）有機性汚泥の処理装置が、嫌気性処理装置又は
好気性処理装置であることを特徴とする上記（１１）又
は（１２）に記載の有機性汚泥の処理装置。
（１４）有機性汚泥の処理装置であって、（Ｉ）好熱性
分解微生物を含有する回転円板体からなる有機性汚泥の
前分解処理装置と（II）該前分解処理装置で得られた分
解物を酸発酵性微生物及び／又はメタン発酵性微生物を
含む嫌気性消化汚泥を用いて消化処理する装置とを備え
たことを特徴とする有機性汚泥の処理装置。
（１５）（II）の装置で得られる処理汚泥を（I）の装
置に循環し再処理する手段を備えたことを特徴とする上
記（１４）に記載の有機性汚泥の処理方法。
（１６）（II）の装置で得られる処理汚泥を直接又は固
液分離し肥料及び／又は肥料の原料として利用する手段
を備えたことを特徴とする上記（１４）に記載の有機性
汚泥の処理装置。
（１７）有機性汚泥の処理装置であって、（Ｉ）好熱性
分解微生物を含有する回転円板体からなる有機性汚泥の
前分解処理装置と（II）該前分解処理装置で得られた分
解物を好気性分解微生物を含む活性汚泥を用いて処理す
る装置とを備えたことを特徴とする有機性汚泥の処理装
置。
（１８）（II）の工程で得られる処理汚泥を（I）の工
程に循環し再処理する手段を備えたことを特徴とする上
記（１７）に記載の有機性汚泥の処理装置。
（１９）（II）の工程で得られる処理汚泥を直接又は固
液分離し肥料及び／又は肥料の原料として利用する手段
を備えたことを特徴とする上記（１７）に記載の有機性
汚泥の処理装置。The inventor of the present invention has completed the present invention as a result of intensive studies to solve the above problems. That is, according to the present invention, the following inventions are provided. (1) In the method for treating organic sludge, the organic sludge is pre-decomposed by a rotating disk method before the anaerobic treatment and / or the aerobic treatment, and the organic sludge treatment method is characterized. (2) The method for treating organic sludge according to (1) above, wherein the rotating disk method utilizes a thermophilic degrading microorganism. (3) The method for treating organic sludge according to (1) or (2) above, wherein the rotating disk method is set to conditions suitable for attachment and growth of thermophilic degrading microorganisms. (4) In the method for treating organic sludge, (I) a step of pre-decomposing the organic sludge by a rotating disk method using a thermophilic decomposing microorganism, (II) a decomposition product obtained in the pre-decomposition step is treated with an acid. A method for treating organic sludge, which comprises treating with anaerobic digested sludge containing fermentative microorganisms and / or methane-fermentative microorganisms. (5) The method for treating organic sludge according to the above (4), wherein the gas phase portion containing methane obtained in the step (II) is used as a fuel. (6) The method for treating organic sludge according to the above (4) or (5), wherein the treated sludge obtained in the step (II) is circulated to the step (I) and retreated. (7) The organic substance according to any one of the above (4) to (6), characterized in that the treated sludge obtained in the step (II) is directly or solid-liquid separated and used as a fertilizer and / or a raw material for the fertilizer. Sludge treatment method. (8) In the method for treating organic sludge, (I) a step of pre-decomposing the organic sludge by a rotating disk method utilizing a thermophilic decomposing microorganism, and (II) a decomposition product obtained in the pre-decomposition step is preferable. A method for treating organic sludge, which comprises treating with activated sludge containing gas-degrading microorganisms. (9) The method for treating organic sludge according to the above (8), wherein the treated sludge obtained in the step (II) is circulated to the step (I) and retreated. (10) The method for treating organic sludge according to the above (9), wherein the treated sludge obtained in the step (II) is directly or solid-liquid separated and used as a fertilizer and / or a raw material of a fertilizer. (11) An organic sludge treatment device, comprising an organic sludge pre-decomposition treatment device composed of a rotating disk body. (12) The apparatus for treating organic sludge according to (11) above, wherein the rotating disk body contains a thermophilic degrading microorganism. (13) The organic sludge treatment device according to the above (11) or (12), wherein the organic sludge treatment device is an anaerobic treatment device or an aerobic treatment device. (14) A device for treating organic sludge, comprising: (I) a device for pre-decomposition of organic sludge comprising a rotating disk containing thermophilic degrading microorganisms; and (II) a device for pre-decomposition treatment. An apparatus for treating organic sludge, comprising: an apparatus for digesting a decomposed product using anaerobic digested sludge containing acid-fermenting microorganisms and / or methane-fermenting microorganisms. (15) The method for treating organic sludge as described in (14) above, which is provided with means for circulating the treated sludge obtained by the apparatus of (II) to the apparatus of (I) and reprocessing. (16) The organic sludge according to (14) above, which is provided with a means for directly or solid-liquid separating the treated sludge obtained by the apparatus of (II) and utilizing it as a fertilizer and / or a raw material for the fertilizer. Processing equipment. (17) A device for treating organic sludge, comprising: (I) a device for pre-decomposition of organic sludge comprising a rotating disk containing thermophilic degrading microorganisms; and (II) a device for pre-degradation. An apparatus for treating organic sludge, comprising: an apparatus for treating decomposed products using activated sludge containing aerobic degrading microorganisms. (18) The apparatus for treating organic sludge according to the above (17), which is provided with a means for circulating the treated sludge obtained in the step (II) to the step (I) and reprocessing the sludge. (19) The organic sludge as described in (17) above, which is provided with a means for directly or solid-liquid separating the treated sludge obtained in the step (II) and utilizing it as a fertilizer and / or a raw material for the fertilizer. Processing equipment.
【０００８】[0008]
【発明の実施の形態】本発明の最大の特徴は、従来の有
機性汚泥の生物学的処理方法の有する、消化速度が遅
い、有機物分解率が悪い、大量の汚泥が発生するな
どといった問題点を克服するために、嫌気性消化又は好
気性処理の前に該有機性汚泥を予め好気性微生物を利用
した回転円板法により好気的及び／又は嫌気的に前分解
処理する点にある。BEST MODE FOR CARRYING OUT THE INVENTION The most significant feature of the present invention is that the conventional biological treatment methods for organic sludge have such problems that the digestion rate is slow, the decomposition rate of organic matter is poor, and a large amount of sludge is generated. In order to overcome the above, the organic sludge is preliminarily aerobically and / or anaerobically predecomposed by a rotating disk method utilizing aerobic microorganisms before anaerobic digestion or aerobic treatment.
【０００９】このように有機性汚泥を予め、好熱性条件
下で好気的及び／又は嫌気的に回転円板法を用いて前分
解処理すると、好熱性分解微生物の分泌するプロテアー
ゼやアミラーゼなどの酵素により、有機性汚泥中の微生
物の細胞壁、細胞膜やタンパク質などの高分子有機物の
死滅や分解が促進され、後段の嫌気性消化工程や好気性
消化工程での有機物からのメタン及び二酸化炭素又は水
及び二酸化炭素の変換反応が効率よく進む。Thus, when the organic sludge is pre-decomposed aerobically and / or anaerobically under the thermophilic condition using the rotating disk method, the protease and amylase secreted by the thermophilic degrading microorganisms Enzymes promote the killing and decomposition of high molecular weight organic substances such as cell walls of microorganisms, cell membranes and proteins in organic sludge, and methane and carbon dioxide or water from organic substances in the subsequent anaerobic digestion process and aerobic digestion process. And the conversion reaction of carbon dioxide proceeds efficiently.
【００１０】すなわち、従来の直接的微生物処理法で、
微生物の塊である廃水処理場の余剰汚泥などの有機性汚
泥中の微生物が、嫌気性処理槽内や好気性処理槽（活性
汚泥処理槽）内で死滅しにくいことや分解されにくいこ
とが有機物分解率の低い主な原因であったが、本発明方
法では予め有機性汚泥を好熱性分解微生物を利用した回
転円板法により好熱的な条件下で前処理するので、微生
物の死滅や分解が進んでおり、嫌気性処理工程や好気性
処理工程での有機物からのメタン及び二酸化炭素又は水
及び二酸化炭素への変換反応が効率よく進行するのであ
る。That is, by the conventional direct microbial treatment method,
It is an organic matter that microorganisms in organic sludge such as surplus sludge of wastewater treatment plant, which is a mass of microorganisms, are not easily killed or decomposed in an anaerobic treatment tank or an aerobic treatment tank (activated sludge treatment tank). Although it was the main cause of the low decomposition rate, in the method of the present invention, the organic sludge is pretreated under a thermophilic condition by a rotating disk method utilizing a thermophilic degrading microorganism, so that the microorganism is killed or decomposed. Therefore, the conversion reaction from organic matter to methane and carbon dioxide or water and carbon dioxide in the anaerobic treatment step and the aerobic treatment step efficiently progresses.
【００１１】本発明の処理対象となる有機性汚泥とは、
食品工場・浄化槽・下水処理場等で廃水処理時に発生す
る、初沈汚泥と呼ばれるタンパク質、炭水化物、脂質、
繊維などの有機物と水の混合物、余剰汚泥と呼ばれる廃
水浄化の際に増殖した微生物そのもの、食品工場・浄化
槽・下水処理場等で廃水処理後排出される初沈汚泥と余
剰汚泥の混合物である廃水処理汚泥一般が含まれる他、
嫌気性した後に排出される汚泥などが包含される。The organic sludge to be treated by the present invention is
Proteins, carbohydrates and lipids called primary sludge generated during wastewater treatment at food factories, septic tanks, sewage treatment plants, etc.
A mixture of organic matter such as fibers and water, microorganisms called surplus sludge that proliferate during wastewater purification, wastewater that is a mixture of initial sludge and excess sludge discharged after wastewater treatment at food factories, septic tanks, sewage treatment plants, etc. In addition to general treated sludge,
This includes sludge discharged after being anaerobic.
【００１２】本明細書で言う「回転円板法」とは、微生
物を付着させた多数枚の回転円板を備えた回転円板装置
内に被処理物を導入し、回転円板表面に付着した微生物
の作用で被処理物に含まれる有機物等を分解浄化する方
法と定義され、排水処理や汚水処理などの技術分野で慣
用されている技術用語である。The "rotating disc method" referred to in the present specification is to introduce the object to be treated into a rotating disc device equipped with a large number of rotating discs to which microorganisms are adhered, and to attach it to the surface of the rotating disc. It is defined as a method for decomposing and purifying organic substances and the like contained in the object to be treated by the action of the microorganisms, and is a technical term that is commonly used in the technical field of wastewater treatment, sewage treatment and the like.
【００１３】また、本明細書で言う、「好熱性分解微生
物」とは、至適温度50〜70℃で成育できる微生物で、細
胞外にプロテアーゼやアミラーゼなどの有機物分解酵素
を排出して有機物の分解を促進する微生物を意味するも
ので、その代表的な属としては、Bacillus等があげられ
る。As used herein, the term "thermophilic degrading microorganism" refers to a microorganism that can grow at an optimum temperature of 50 to 70 ° C. and emits organic matter degrading enzymes such as protease and amylase to the outside of the cell to remove organic matter. It means a microorganism that promotes decomposition, and its typical genus includes Bacillus and the like.
【００１４】以下、本発明方法を具体的に説明する。本
発明方法においては、まず、有機性汚泥の処理の前に、
該有機性汚泥を予め好熱性微生物を付着させた回転円板
型装置により前分解処理することが必要である。この前
分解処理は、例えば、処理対象となる有機性汚泥を、水
分含量を80〜99.9%、好ましくは90〜99%に調整し、回転
円板型装置内で反応温度は10〜100℃好ましくは55〜75
℃で原料の有機性汚泥に円板を接触させながら円板を回
転させて分解させればよい。The method of the present invention will be specifically described below. In the method of the present invention, first, before the treatment of the organic sludge,
It is necessary to pre-decompose the organic sludge with a rotary disk type device to which thermophilic microorganisms are attached in advance. This pre-decomposition treatment, for example, the organic sludge to be treated, the water content is adjusted to 80 ~ 99.9%, preferably 90 ~ 99%, the reaction temperature in the rotary disk type device is 10 ~ 100 ° C. Is 55 to 75
It may be decomposed by rotating the disc while bringing the disc into contact with the organic sludge as a raw material at ℃.
【００１５】本発明で好ましく使用される回転円板型装
置は、好熱性分解微生物を表面に付着させた微生物担体
がドーナッツ型円板となっており、円板が多数連結して
円筒状になった回転円板体を回転させるものである。こ
の回転円板型装置は、回転円板体と回転軸、回転させる
モーターとモーターの制御装置、対象汚泥と回転円板を
接触させる槽などから構成される。このような装置とし
ては、通常の廃水処理で使用される従来公知の回転円板
型装置を用いることができる。In the rotating disk type apparatus preferably used in the present invention, a microorganism carrier having thermophilic degrading microorganisms adhered to the surface is a donut type disk, and a large number of disks are connected to form a cylindrical shape. The rotating disc body is rotated. This rotary disk type device is composed of a rotary disk body and a rotary shaft, a motor for rotating the motor, a controller for the motor, a tank for bringing the target sludge into contact with the rotary disk, and the like. As such a device, a conventionally known rotary disk type device used in ordinary wastewater treatment can be used.
【００１６】回転円板の直径は0.1〜10m、好ましくは1
〜5mである。回転円板の回転数は酸素の供給と関係があ
るので有機物負荷により調整する必要があるが、通常0.
01〜100回転／分、望ましくは0.2〜5回転／分である。
この場合、回転円板装置に十分空気を循環させ、円板を
10〜90%、好ましくは30〜50%水没させることにより、円
板に付着した微生物層の外側には空気が供給され好気的
な条件になり、円板の最表面近くの微生物層の内側では
空気が少なく嫌気的な条件になる。このような仕組みに
より、本発明においては、有機性汚泥を好熱性好気性微
生物あるいは好熱性嫌気性微生物の何れの微生物により
前分解処理することが可能になる。The diameter of the rotating disk is 0.1-10 m, preferably 1
~ 5m. Since the rotation speed of the rotating disk is related to the supply of oxygen, it needs to be adjusted by the organic matter load, but it is usually 0.
The rotation speed is 01 to 100 rpm, preferably 0.2 to 5 rpm.
In this case, sufficiently circulate the air through the rotating disc device to remove the disc.
By submerging 10 to 90%, preferably 30 to 50% in water, air is supplied to the outside of the microbial layer attached to the disc, which becomes an aerobic condition, and inside the microbial layer near the outermost surface of the disc. Then there is little air and it becomes an anaerobic condition. With such a mechanism, in the present invention, the organic sludge can be pre-decomposed by any of the thermophilic aerobic microorganisms and the thermophilic anaerobic microorganisms.
【００１７】本発明において、回転円板表面に好熱性分
解微生物を含有させる方法は、特に制限されず、運転中
の回転円板から好熱性分解微生物を移植する方法や好気
性分解微生物を含有する下水処理場の活性汚泥やコンポ
ストなどを種微生物として回転円板装置内の液層に保持
し回転円板を所定の条件で運転することにより円板表面
に分解前処理に適した微生物を付着させる方法などの適
宜方法が採られる。何れの方法においても、分解微生物
の増殖が早いため、汚泥などの有機物を供給して回転円
板装置を運転すると、直ちに円板表面に分解微生物膜が
形成される。In the present invention, the method of incorporating the thermophilic degrading microorganisms on the surface of the rotating disk is not particularly limited, and includes a method of transplanting the thermophilic degrading microorganisms from the rotating disk during operation or an aerobic degrading microorganism. Activated sludge and compost from sewage treatment plants are used as seed microorganisms in the liquid layer inside the rotating disk device and the rotating disk is operated under specified conditions to attach microorganisms suitable for pre-decomposition treatment to the disk surface. An appropriate method such as a method is adopted. In either method, the degrading microorganisms proliferate quickly, and therefore, when an organic substance such as sludge is supplied to operate the rotating disk device, a degrading microorganism film is immediately formed on the disk surface.
【００１８】このように、本発明においては、汚泥分解
に適した雑多な微生物が回転円板に付着して分解工程に
寄与するので、好熱性分解微生物の種類は特定されず嫌
気性あるいは好気性の何れのものも使用可能である。As described above, in the present invention, since various microorganisms suitable for sludge decomposition adhere to the rotating disk and contribute to the decomposition process, the type of thermophilic degrading microorganism is not specified and is anaerobic or aerobic. Any of the above can be used.
【００１９】次に、本発明においては、回転円板装置に
より前分解処理された分解産物を、引き続き分解処理す
る。この後段の処理法は嫌気性処理でも好気性処理であ
ってもよい。嫌気性処理にあっては、例えば前分解処理
された分解産物を消化汚泥と混合し、含水率50〜99.9
%、好ましく85〜99%に調整し、10〜100℃好ましく30〜3
5℃の中温発酵かまたは50〜70℃の高温発酵で嫌気性処
理させ、メタンを発生させる。この嫌気性処理工程にお
いては、嫌気性消化槽内には空気及び／又は酸素は供給
しない。Next, in the present invention, the decomposition products predecomposed by the rotating disk device are subsequently decomposed. The latter treatment method may be anaerobic treatment or aerobic treatment. In anaerobic treatment, for example, the pre-decomposition decomposition product is mixed with digested sludge to obtain a water content of 50-99.9.
%, Preferably 85-99%, 10-100 ℃ preferably 30-3
Anaerobic treatment is carried out by medium temperature fermentation at 5 ℃ or high temperature fermentation at 50-70 ℃ to generate methane. In this anaerobic treatment step, air and / or oxygen is not supplied into the anaerobic digester.
【００２０】嫌気性消化汚泥としては、例えば、酸発酵
性微生物やメタン発酵性微生物を含有する下水汚泥の嫌
気性消化に使用される通常の嫌気性消化汚泥や、既存の
嫌気性消化汚泥を好気性分解産物に馴致培養したもの使
用することができる。As the anaerobic digested sludge, for example, an ordinary anaerobic digested sludge used for anaerobic digestion of sewage sludge containing acid-fermenting microorganisms or methane-fermenting microorganisms or an existing anaerobic digested sludge is preferable. It can be used after culturing by acclimatizing to the aerial degradation product.
【００２１】なお、酸発酵性微生物とは、嫌気性消化に
おいて有機酸等を生成する微生物を意味し、Bacteroide
s sp.、Clostridium sp.、Bacillus sp.、Lactobacillu
s sp.等があげられる。また、メタン発酵性微生物と
は、嫌気性消化においてメタンを生成する微生物を意味
し、Methanosarcina sp.、Methanosaeta sp.、Methanog
eum sp.等があげられる。両者とも従来よく知られてい
るものである。The acid-fermenting microorganism means a microorganism which produces an organic acid or the like in anaerobic digestion, and Bacteroide
s sp., Clostridium sp., Bacillus sp., Lactobacillu
s sp., etc. Further, a methane-fermenting microorganism means a microorganism that produces methane during anaerobic digestion, and includes Methanosarcina sp., Methanosaeta sp., Methanog
eum sp. Both are well known in the art.
【００２２】好気性処理にあっては、回転円板型装置に
より前分解処理された分解産物を、例えば活性汚泥法等
により好気処理すればよい。この好気性処理は、例えば
前分解処理された分解産物を活性汚泥と混合し、含水率
80〜99.9%、好ましく95〜99%に調整し、０〜７０℃好ま
しく20〜35℃で曝気しながら好気性処理し、水と二酸化
炭素に分解処理する。In the aerobic treatment, the decomposition products pre-decomposed by the rotary disk type device may be aerobically treated by, for example, the activated sludge method. This aerobic treatment is carried out, for example, by mixing predecomposition-decomposed decomposition products with activated sludge to obtain a water content.
It is adjusted to 80 to 99.9%, preferably 95 to 99%, aerobically treated at 0 to 70 ° C, preferably 20 to 35 ° C while aerating, and decomposed into water and carbon dioxide.
【００２３】この場合、活性汚泥としては、例えば、好
気性微生物を含有する下水処理に使用される通常の活性
汚泥や、既存の活性汚泥を回転円板装置により前分解さ
れた汚泥を馴致培養したものなどを使用することができ
る。In this case, as the activated sludge, for example, ordinary activated sludge used for the treatment of sewage containing aerobic microorganisms, or sludge obtained by pre-decomposing existing activated sludge by a rotary disc device, is cultivated by acclimatization. Things etc. can be used.
【００２４】なお、ここでいう活性汚泥とは、好気的に
有機物を分解する多種多様な細菌や原生動物等の微生物
を意味し、Zooglea ramigera, Sphaerotilus natans, M
onasamoebina, Mayorella penardi, Colpoda inflata等
があげられる。従来よく知られているものである。The term "activated sludge" as used herein means a wide variety of microorganisms such as protozoa and bacteria that aerobically decompose organic matter. Zooglea ramigera , Sphaerotilus natans , M
Examples include onasamoebina , Mayorella penardi and Colpoda inflata . It is well known in the art.
【００２５】前記のようにして、有機性汚泥を好熱性分
解微生物を用い、好気性および嫌気性条件で分解処理す
ると、好熱性分解微生物の分泌するプロテアーゼやアミ
ラーゼなどの酵素により、汚泥微生物の細胞壁、細胞膜
やタンパク質などの高分子有機物が分解され、細胞残滓
と比較的低分子の有機物の混合物が得られる。微生物の
塊である廃水処理場の余剰汚泥などを嫌気性した場合、
従来の嫌気性条件では微生物が死滅及び分解されにくい
ことが有機物分解率の低い主な原因であったが、本発明
方法では、好熱性条件で前処理するので、微生物の死滅
や分解が進んでおり、後段の嫌気性消化槽や活性汚泥処
理槽における有機物の分解反応が効率よく進む。As described above, when the organic sludge is decomposed by the thermophilic decomposing microorganism under aerobic and anaerobic conditions, the cell wall of the sludge microorganism is decomposed by the enzymes such as protease and amylase secreted by the thermophilic decomposing microorganism. , High molecular weight organic substances such as cell membranes and proteins are decomposed to obtain a mixture of cell debris and relatively low molecular weight organic substances. If you anaerobically remove excess sludge from a wastewater treatment plant that is a microbial mass,
In the conventional anaerobic condition, it was the main cause of low organic matter decomposition rate that microorganisms are less likely to be killed and decomposed, but in the method of the present invention, since pretreatment is performed under thermophilic conditions, the killing and decomposition of microorganisms proceed. Therefore, the decomposition reaction of organic substances in the anaerobic digestion tank and the activated sludge treatment tank in the latter stage efficiently proceeds.
【００２６】嫌気性処理時に発生するメタンは、ボイラ
ー燃料、消化ガス発電、マイクロガスタービンや水素へ
の改質後燃料電池の燃料として利用することが出来る。
なお、後段で活性汚泥処理する場合は、メタンは生成し
ない。Methane generated during anaerobic treatment can be used as fuel for boiler fuel, digestion gas power generation, micro gas turbine and fuel cell after reforming to hydrogen.
When activated sludge is treated in the latter stage, methane is not produced.
【００２７】本発明方法では、後段で嫌気性消化を利用
してもあるいは活性汚泥処理などの好気性処理を利用し
ても従来の有機性汚泥の処理法に比べ有機物分解率が向
上するため、残滓の発生量も従来法に比べ減少する。こ
の残滓は、窒素やリンなどの肥料成分を多く含み発酵が
進んでいるので、そのまま及び／又は固液分離後そのま
ま液体肥料や固形肥料として利用及び／又は肥料の原料
として利用すること可能である。また、好熱性分解槽の
温度が高いので、病原性微生物等の有害微生物の多くが
死滅するため、有機性肥料の原料として適したもとな
る。In the method of the present invention, even if anaerobic digestion is used in the subsequent stage or aerobic treatment such as activated sludge treatment is used, the decomposition rate of organic matter is improved as compared with the conventional method for treating organic sludge. The amount of residue generated is also reduced compared to the conventional method. Since this residue contains a large amount of fertilizer components such as nitrogen and phosphorus and is being fermented, it can be used as it is and / or as it is after solid-liquid separation as a liquid fertilizer or solid fertilizer and / or as a raw material for fertilizer. . In addition, since the temperature of the thermophilic decomposition tank is high, many harmful microorganisms such as pathogenic microorganisms are killed, which makes it suitable as a raw material for organic fertilizers.
【００２８】次に、本発明方法を好ましく実施するため
の処理装置を図面を参照しながら詳述する。図１は本発
明の処理装置の説明図である。本説明図は後段に嫌気性
消化槽を利用する場合であり、後段に活性汚泥処理を利
用する場合は、嫌気性消化槽が活性汚泥処理槽に代わ
る。Next, a processing apparatus for preferably carrying out the method of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram of a processing apparatus of the present invention. This explanatory diagram shows a case where an anaerobic digestion tank is used in the latter stage, and when an activated sludge treatment is used in the latter stage, the anaerobic digestion tank replaces the activated sludge treatment tank.
【００２９】図１において、１は有機性汚泥貯留タン
ク、２は原料有機性汚泥配管、３は回転円板型装置、４
は回転円板、５はモーター、６は回転円板槽、７は好熱
性分解物配管、８は嫌気性消化槽、９は消化ガス配管、
１０は消化ガス貯留タンク、１１は嫌気性処理物配管、
１２は固液分離装置、１３は処理汚泥返送配管、１４は
処理液相部配管、１５は処理液相部貯留タンク、１６は
処理固相部配管、１７は処理固相部貯留タンクを各示
す。In FIG. 1, 1 is an organic sludge storage tank, 2 is a raw material organic sludge pipe, 3 is a rotary disc type device, 4
Is a rotating disk, 5 is a motor, 6 is a rotating disk tank, 7 is a thermophilic decomposition product piping, 8 is an anaerobic digestion tank, 9 is a digestion gas piping,
10 is a digestion gas storage tank, 11 is an anaerobic treated product piping,
12 is a solid-liquid separation device, 13 is a treated sludge return pipe, 14 is a treated liquid phase part pipe, 15 is a treated liquid phase part storage tank, 16 is a treated solid phase part pipe, and 17 is a treated solid phase part storage tank. .
【００３０】図１の装置によって本発明方法を実施する
には、有機性汚泥貯留タンク１より原料有機性汚泥配管
２を通って、好熱的な分解を生じさせる微生物を含有す
る回転円板６が回転している回転円板装置３に、処理対
象となる有機性汚泥、嫌気性消化汚泥または返送した処
理汚泥を供給・混合する。好熱性分解を生じさせる微生
物を含有する回転円板６は、当初下水処理場の活性汚泥
法から生じる余剰汚泥やコンポストを付着させ使用すれ
ばよい。To carry out the method of the present invention using the apparatus of FIG. 1, a rotary disk 6 containing microorganisms which cause thermophilic decomposition from the organic sludge storage tank 1 through the raw material organic sludge pipe 2. The organic disc, the anaerobic digested sludge, or the returned treated sludge to be treated is supplied to and mixed with the rotating disk device 3 which is rotating. The rotating disk 6 containing the microorganisms that cause thermophilic decomposition may be used by initially attaching excess sludge and compost generated from the activated sludge method of a sewage treatment plant.
【００３１】回転円板型装置３は、回転円板４、回転さ
せるモーター５、対象汚泥と回転円板を接触させる回転
円板槽６等からなる。この回転円板装置３において、有
機性汚泥は回転円板４に付着した好熱性好気性微生物お
よび好熱性嫌気性微生物の分泌する酵素や界面活性剤な
どの分解作用を受ける。この分解処理により、有機性汚
泥の主要な成分である細菌などの細胞壁や細胞膜が破壊
され、有機物が可溶化・低分子化され、後段の嫌気性消
化のガス化反応が進行しやすくなる。The rotary disc type device 3 comprises a rotary disc 4, a rotating motor 5, a rotary disc tank 6 for bringing the target sludge into contact with the rotary disc, and the like. In this rotary disc device 3, the organic sludge is subjected to a decomposition action of enzymes and surfactants secreted by the thermophilic aerobic microorganisms and thermophilic anaerobic microorganisms attached to the rotary disc 4. By this decomposition treatment, the cell walls and cell membranes of bacteria, which are the main components of organic sludge, are destroyed, the organic substances are solubilized and reduced in molecular weight, and the gasification reaction of anaerobic digestion in the latter stage is facilitated.
【００３２】また、回転円板装置３において、回転円板
に付着した好熱性微生物の分解速度が速いため回転円板
装置３はその容量を小さくすることが可能である。Further, in the rotary disc device 3, since the decomposition rate of the thermophilic microorganisms attached to the rotary disc is high, the rotary disc device 3 can reduce its capacity.
【００３３】一方、回転円板装置３で得られた分解物は
分解物配管７を通って嫌気性消化槽８に導入される。嫌
気性消化槽８は酸素がない嫌気条件に保たれ、回転円板
装置３で得られた分解物は酸生成微生物やメタン生成微
生物の働きで、メタン、二酸化炭素、アンモニアなどに
分解処理される。この時、嫌気性消化の対象となる分解
物は、すでに好熱性分解槽３で分解処理を受けているの
で、細胞構造などの破壊が進み細胞内の有機物が可溶化
しているので、酸生成微生物やメタン生成微生物による
分解反応を受けやすくなっている。そのため、従来の有
機性汚泥の嫌気性消化に見られる、滞留時間が長く、有
機物分解率が低いという問題点が改善され、嫌気性消化
槽をコンパクト化することが出来る。On the other hand, the decomposed product obtained by the rotary disk device 3 is introduced into the anaerobic digestion tank 8 through the decomposed product pipe 7. The anaerobic digestion tank 8 is kept in an anaerobic condition without oxygen, and the decomposed product obtained by the rotary disk device 3 is decomposed into methane, carbon dioxide, ammonia, etc. by the action of acid-producing microorganisms and methanogenic microorganisms. . At this time, since the decomposition products to be anaerobically digested have already been decomposed in the thermophilic decomposition tank 3, destruction of the cell structure and the like progresses and the organic substances in the cells are solubilized. It is susceptible to decomposition reactions by microorganisms and methanogenic microorganisms. Therefore, the problems of long residence time and low organic matter decomposition rate, which are observed in the conventional anaerobic digestion of organic sludge, are improved, and the anaerobic digestion tank can be made compact.
【００３４】また、嫌気性消化槽８内で発生したメタン
を含む消化ガスは消化ガス配管９を通って消化ガス貯留
タンク１０に貯留される。この場合の消化ガスは、通常
CH4:50〜100モル％、CO2:0〜50モル％、H2:0〜10モル％
を含有する。The digestion gas containing methane generated in the anaerobic digestion tank 8 is stored in the digestion gas storage tank 10 through the digestion gas pipe 9. Digestion gas in this case is usually
CH4: 50-100 mol%, CO2: 0-50 mol%, H2: 0-10 mol%
Contains.
【００３５】一方、嫌気性消化槽８で得られた消化物
は、処理物配管１１を通って固液分離装置１２に導入さ
れる。消化物の一部は処理汚泥返送配管１３を通って好
熱性分解槽３の入り口に処理対象汚泥の一部として返送
される。On the other hand, the digested substance obtained in the anaerobic digestion tank 8 is introduced into the solid-liquid separation device 12 through the treated substance pipe 11. A part of the digested material is returned to the entrance of the thermophilic decomposition tank 3 through the treated sludge return pipe 13 as a part of the sludge to be treated.
【００３６】固液分離装置１２に導入された処理物は液
相部と固相部に分離され、液相部は処理液相部配管１４
を通って、処理液相部貯留タンク１５に貯留される。処
理液相部（廃水）は、通常溶存有機物や溶存無機物の濃
度の低いものであり、必要に応じ廃水処理後放流され
る。固相部は処理固相部配管１６を通って処理固相部貯
留タンク１７に貯留される。固相部は、有機物の分解が
十分に行われており、同時にアンモニアやリン酸を多く
含むので、そのまま有機肥料及び／又は肥料の原料とな
る。また、含水率が下がり十分減量化されているので、
焼却処分してもよい。前記固液分離装置１２は、濾過器
や遠心分離機、沈降槽等からなる。The treated material introduced into the solid-liquid separation device 12 is separated into a liquid phase portion and a solid phase portion, and the liquid phase portion is treated liquid piping 14
And is stored in the processing liquid phase storage tank 15. The treated liquid phase portion (waste water) usually has a low concentration of dissolved organic substances and dissolved inorganic substances, and is discharged after the waste water treatment as necessary. The solid phase portion is stored in the processing solid phase portion storage tank 17 through the processing solid phase portion pipe 16. The solid phase portion is sufficiently decomposed with organic substances and, at the same time, contains a large amount of ammonia and phosphoric acid. In addition, since the water content has decreased and the volume has been reduced sufficiently,
May be incinerated. The solid-liquid separation device 12 includes a filter, a centrifuge, a settling tank, and the like.
【００３７】嫌気性消化槽８で得られた消化物の一部を
回転円板装置３に返送し、再分解させることにより、消
化物に含有される未分解の有機物が好気性分解を経て再
び嫌気性消化されるので有機物分解率が向上する。By returning a part of the digested material obtained in the anaerobic digestion tank 8 to the rotary disc device 3 and re-decomposing it, the undecomposed organic matter contained in the digested material undergoes aerobic decomposition again. Anaerobic digestion improves organic matter decomposition rate.
【００３８】[0038]
【発明の効果】本発明は前記のような構成であり、有機
性汚泥はまず回転円板法により好熱性分解処理を受け、
その分解物は迅速に効率よく嫌気性消化処理または活性
汚泥処理を受ける。この好熱性分解処理と嫌気性消化ま
たは活性汚泥処理を組み合わせることにより、有機性汚
泥中の有機物は従来の処理法と比較し、分解速度が速
く、有機物分解率が高く、汚泥発生量も少ない。本発明
の場合、発生した残滓（処理された固相部）を返送して
再処理するシステムを導入すると、さらに残滓の発生量
が少なくなり、最終的な汚泥処理量が低減される。ま
た、本法によれば、最終的に発生する残滓（処理された
固相部）や処理液にはアンモニアやリン酸が含有されて
いるので、アンモニアやリン酸を多く含む有機性肥料や
液肥を生産することができる。EFFECTS OF THE INVENTION The present invention has the above-mentioned constitution, and the organic sludge is first subjected to thermophilic decomposition treatment by the rotating disk method,
The decomposed product is quickly and efficiently subjected to anaerobic digestion treatment or activated sludge treatment. By combining this thermophilic decomposition treatment with anaerobic digestion or activated sludge treatment, the organic matter in the organic sludge has a faster decomposition rate, a higher organic matter decomposition rate, and a smaller amount of sludge generation than conventional treatment methods. In the case of the present invention, if a system for returning the generated residue (treated solid phase part) and reprocessing is introduced, the amount of the generated residue is further reduced and the final sludge treatment amount is reduced. Further, according to this method, since the residue (treated solid phase portion) and the treatment liquid that are finally generated contain ammonia and phosphoric acid, organic fertilizers and liquid fertilizers containing a large amount of ammonia and phosphoric acid are used. Can be produced.
【図１】本発明に係る有機性汚泥の嫌気性消化処理装置
の説明図である。FIG. 1 is an explanatory view of an anaerobic digestion treatment apparatus for organic sludge according to the present invention.
１． 有機性汚泥貯留タンク ２． 原料有機性汚泥配管 ３． 回転円板型装置 ４． 回転円板 ５． モーター ６． 回転円板槽 ７． 好気性分解物配管 ８． 嫌気性消化槽 ９． 消化ガス配管 １０．消化ガス貯留タンク １１．嫌気性処理物配管 １２．固液分離装置 １３．処理汚泥返送配管 １４．処理液相部配管 １５．処理液相部貯留タンク １６．処理固相部配管 １７．処理固相部貯留タンク 1. Organic sludge storage tank 2. Raw material organic sludge piping 3. Rotating disk type device 4. Rotating disk 5. motor 6. Rotating disk tank 7. Aerobic decomposition product piping 8. Anaerobic digester 9. Digestion gas piping 10. Digestion gas storage tank 11. Anaerobic treated product piping 12. Solid-liquid separation device 13. Treated sludge return piping 14. Processing liquid phase piping 15. Treatment liquid phase storage tank 16. Processing solid phase piping 17. Treatment solid phase storage tank
Claims (19)
処理及び／又は好気性処理の前に該有機性汚泥を予め回
転円板法により前分解処理することを特徴とする有機性
汚泥の処理方法。1. A method of treating organic sludge, characterized in that the organic sludge is pre-decomposed by a rotating disk method before the anaerobic treatment and / or aerobic treatment. Method.
したものであることを特徴とする請求項１に記載の有機
性汚泥の処理方法。2. The method for treating organic sludge according to claim 1, wherein the rotating disk method utilizes a thermophilic degrading microorganism.
・増殖に適した条件に設定されていることを特徴とする
請求項１又は２に記載の有機性汚泥の処理方法。3. The method for treating organic sludge according to claim 1, wherein the rotating disk method is set under conditions suitable for attachment and growth of thermophilic degrading microorganisms.
好熱性分解微生物を利用した回転円板法により有機性汚
泥を前分解する工程、（II）該前分解工程で得られた分
解物を酸発酵性微生物及び／又はメタン発酵性微生物を
含む嫌気性消化汚泥を用いて処理することを特徴とする
有機性汚泥の処理方法。4. A method for treating organic sludge, comprising: (I)
A step of pre-decomposing organic sludge by a rotating disk method utilizing a thermophilic decomposing microorganism, (II) an anaerobic digestion product obtained in the pre-decomposing step containing an acid-fermenting microorganism and / or a methane-fermenting microorganism. A method for treating organic sludge, which comprises treating with digested sludge.
る気相部を燃料とすることを特徴とする請求項４記載の
有機性汚泥の処理方法。5. The method for treating organic sludge according to claim 4, wherein the gas phase portion containing methane obtained in the step (II) is used as a fuel.
（I）の工程に循環し再処理することを特徴とする請求
項４又は５に記載の有機性汚泥の処理方法。6. The method for treating organic sludge according to claim 4 or 5, wherein the treated sludge obtained in the step (II) is recycled to the step (I) for retreatment.
又は固液分離し肥料及び／又は肥料の原料として利用す
ることを特徴とする請求項４乃至６何れかに記載の有機
性汚泥の処理方法。7. The organic sludge according to claim 4, wherein the treated sludge obtained in the step (II) is directly or solid-liquid separated and used as a fertilizer and / or a raw material of a fertilizer. Processing method.
好熱性分解微生物を利用した回転円板法により有機性汚
泥を前分解する工程、（II）該前分解工程で得られた分
解物を好気性分解微生物を含む活性汚泥を用いて処理す
ることを特徴とする有機性汚泥の処理方法。8. A method for treating organic sludge, comprising: (I)
A step of pre-decomposing organic sludge by a rotating disk method utilizing thermophilic decomposing microorganisms, (II) treating the decomposition product obtained in the pre-decomposing step with activated sludge containing aerobic decomposing microorganisms. A characteristic method for treating organic sludge.
（I）の工程に循環し再処理することを特徴とする請求
項８に記載の有機性汚泥の処理方法。9. The method for treating organic sludge according to claim 8, wherein the treated sludge obtained in the step (II) is recycled to the step (I) for retreatment.
接又は固液分離し肥料及び／又は肥料の原料として利用
することを特徴とする請求項９に記載の有機性汚泥の処
理方法。10. The method for treating organic sludge according to claim 9, wherein the treated sludge obtained in the step (II) is directly or solid-liquid separated and used as a fertilizer and / or a raw material of a fertilizer.
円板体からなる有機性汚泥の前分解処理装置を備えたこ
とを特徴とする有機性汚泥の処理装置。11. A treatment apparatus for organic sludge, comprising a pre-decomposition treatment apparatus for organic sludge comprising a rotating disc body.
有することを特徴とする請求項１１に記載の有機性汚泥
の処理装置。12. The apparatus for treating organic sludge according to claim 11, wherein the rotating disk body contains a thermophilic degrading microorganism.
装置又は好気性処理装置であることを特徴とする請求項
１１又は１２に記載の有機性汚泥の処理装置。13. The organic sludge treatment device according to claim 11, wherein the organic sludge treatment device is an anaerobic treatment device or an aerobic treatment device.
（Ｉ）好熱性分解微生物を含有する回転円板体からなる
有機性汚泥の前分解処理装置と（II）該前分解処理装置
で得られた分解物を酸発酵性微生物及び／又はメタン発
酵性微生物を含む嫌気性消化汚泥を用いて消化処理する
装置とを備えたことを特徴とする有機性汚泥の処理装
置。14. A treatment apparatus for organic sludge, comprising:
(I) Pre-decomposition treatment device for organic sludge comprising a rotating disc containing thermophilic decomposing microorganisms, and (II) acid-fermenting microorganisms and / or methane-fermentability An apparatus for treating organic sludge, comprising: an apparatus for performing digestion treatment using anaerobic digested sludge containing microorganisms.
（I）の装置に循環し再処理する手段を備えたことを特
徴とする請求項１４に記載の有機性汚泥の処理装置。15. The apparatus for treating organic sludge according to claim 14, further comprising means for circulating the treated sludge obtained by the apparatus of (II) to the apparatus of (I) and reprocessing it.
接又は固液分離し肥料及び／又は肥料の原料として利用
する手段を備えたことを特徴とする請求項１４に記載の
有機性汚泥の処理装置。16. The organic sludge according to claim 14, further comprising means for directly or solid-liquid separating the treated sludge obtained by the apparatus of (II) and utilizing it as a fertilizer and / or a raw material of a fertilizer. Processing equipment.
（Ｉ）好熱性分解微生物を含有する回転円板体からなる
有機性汚泥の前分解処理装置と（II）該前分解処理装置
で得られた分解物を好気性分解微生物を含む活性汚泥を
用いて処理する装置とを備えたことを特徴とする有機性
汚泥の処理装置。17. A device for treating organic sludge, comprising:
(I) Pre-decomposition treatment device for organic sludge comprising a rotating disc containing thermophilic decomposing microorganisms, and (II) Decomposition product obtained by the pre-decomposition treatment device is activated sludge containing aerobic degrading microorganisms. An apparatus for treating organic sludge, comprising:
（I）の工程に循環し再処理する手段を備えたことを特
徴とする請求項１７に記載の有機性汚泥の処理装置。18. The apparatus for treating organic sludge according to claim 17, further comprising means for circulating the treated sludge obtained in the step (II) to the step (I) for reprocessing.
接又は固液分離し肥料及び／又は肥料の原料として利用
する手段を備えたことを特徴とする請求項１７に記載の
有機性汚泥の処理装置。19. The organic sludge according to claim 17, further comprising means for directly or solid-liquid separating the treated sludge obtained in the step (II) and utilizing it as a fertilizer and / or a raw material of a fertilizer. Processing equipment.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289637B (en) * | 2007-08-01 | 2011-07-27 | 容文钰 | Method for preparing clean fuel derived from sludge |
| CN115490408A (en) * | 2022-09-14 | 2022-12-20 | 青岛绿洁坤环保科技有限公司 | Method for optimizing municipal sludge biological drying technology |
| KR102605015B1 (en) * | 2023-04-03 | 2023-11-23 | (주)지구환경기술 | Method for Preparing Liquid Fertilizer by Organic Waste Reduction Treatment using Multi-Complex Fermented Microorganisms and Environment-Friendly Liquid Fertilizer Prepared Thereby |
-
2002
- 2002-04-15 JP JP2002112488A patent/JP3699999B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289637B (en) * | 2007-08-01 | 2011-07-27 | 容文钰 | Method for preparing clean fuel derived from sludge |
| CN115490408A (en) * | 2022-09-14 | 2022-12-20 | 青岛绿洁坤环保科技有限公司 | Method for optimizing municipal sludge biological drying technology |
| KR102605015B1 (en) * | 2023-04-03 | 2023-11-23 | (주)지구환경기술 | Method for Preparing Liquid Fertilizer by Organic Waste Reduction Treatment using Multi-Complex Fermented Microorganisms and Environment-Friendly Liquid Fertilizer Prepared Thereby |
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