JPH11197697A - Organic waste treatment equipment - Google Patents
Organic waste treatment equipmentInfo
- Publication number
- JPH11197697A JPH11197697A JP159398A JP159398A JPH11197697A JP H11197697 A JPH11197697 A JP H11197697A JP 159398 A JP159398 A JP 159398A JP 159398 A JP159398 A JP 159398A JP H11197697 A JPH11197697 A JP H11197697A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- organic waste
- methane fermentation
- fermentation tank
- methane
- 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
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
Landscapes
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は有機性廃棄物の処理
装置に係り、特に有機性廃棄物をメタン発酵する装置に
おいて、得られる汚泥の濃縮率を高め、有機性廃棄物の
分解率を向上させた有機性廃棄物の処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic waste treatment apparatus, and more particularly to an apparatus for methane fermenting organic waste, in which the concentration of obtained sludge is increased and the decomposition rate of organic waste is improved. The present invention relates to an apparatus for treating organic waste.
【０００２】[0002]
【従来の技術】従来、水処理工程において発生する有機
性汚泥や、家庭、食堂等で発生する生ゴミ、厨芥、各種
工場、施設から排出される有機性廃液などの処理方法と
して、図２に示す方法が提案されている（特開平６−６
３５９８号公報）。この方法では、有機性廃棄物はまず
メタン発酵槽（消化槽）１内に投入され、有機物が嫌気
性菌によってメタン及び炭酸ガスに分解される。メタン
発酵槽１から引き抜かれた汚泥（メタン発酵汚泥）は、
遠心濃縮装置に移され、濃縮汚泥と分離液とに分けら
れ、分離液は系外へ排出され、濃縮汚泥はメタン発酵槽
１に返送される。なお、メタン発酵槽１からは適宜余剰
汚泥が引き抜かれる。2. Description of the Related Art FIG. 2 shows a conventional method for treating organic sludge generated in a water treatment process, garbage, kitchen waste, and organic waste liquid discharged from various factories and facilities generated in homes and canteens. The following method has been proposed (Japanese Patent Laid-Open No. 6-6 / 1994).
No. 3598). In this method, organic waste is first introduced into a methane fermentation tank (digestion tank) 1, and organic substances are decomposed into methane and carbon dioxide by anaerobic bacteria. Sludge extracted from the methane fermentation tank 1 (methane fermentation sludge)
The concentrated sludge is transferred to a centrifugal concentrator and separated into a concentrated sludge and a separated liquid. In addition, excess sludge is extracted from the methane fermentation tank 1 as appropriate.
【０００３】[0003]
【発明が解決しようとする課題】メタン発酵汚泥を遠心
濃縮して、濃縮汚泥をメタン発酵槽に返送する従来の方
法では汚泥の濃縮性が悪く、ＳＳ回収率が十分でないと
いう欠点がある。また、このように汚泥の濃縮性が悪い
ことから、汚泥濃縮機の必要容量が大きく、また、濃縮
能力の大きい、従って、消費電力の大きい汚泥濃縮機が
必要となるという不具合がある。更に、従来の方法で
は、汚泥濃縮効率が悪いためにメタン発酵槽に返送され
る汚泥濃度が低いことから、メタン発酵槽内の汚泥濃度
を高く維持することができず、このために、有機性廃棄
物の分解効率も十分ではないという不具合もある。The conventional method of centrifugally concentrating methane fermented sludge and returning the concentrated sludge to the methane fermentation tank has a drawback that the sludge is not thick enough and the SS recovery rate is not sufficient. In addition, since the sludge condensing property is poor, the required capacity of the sludge concentrator is large, and there is a problem that a sludge concentrator having a large concentrating capacity and hence a large power consumption is required. Further, in the conventional method, the sludge concentration in the methane fermentation tank cannot be maintained high because the sludge concentration efficiency is poor and the sludge concentration returned to the methane fermentation tank is low. There is also a problem that the decomposition efficiency of waste is not sufficient.
【０００４】本発明は上記従来の問題点を解決し、有機
性廃棄物をメタン発酵して得られる発酵汚泥を濃縮し、
濃縮汚泥をメタン発酵槽に返送する有機性廃棄物の処理
装置において、汚泥濃縮効率を高めて、汚泥濃縮機の小
型化を図ると共に、メタン発酵槽内汚泥濃度を高く維持
して有機性廃棄物の分解効率を向上させる有機性廃棄物
の処理装置を提供することを目的とする。[0004] The present invention solves the above-mentioned conventional problems and concentrates fermented sludge obtained by methane fermentation of organic waste,
In organic waste treatment equipment that returns concentrated sludge to the methane fermentation tank, the sludge concentration efficiency is increased, the sludge concentrator is reduced in size, and the sludge concentration in the methane fermentation tank is maintained at a high level to reduce the organic waste. It is an object of the present invention to provide an organic waste treatment device that improves the decomposition efficiency of organic waste.
【０００５】[0005]
【課題を解決するための手段】本発明の有機性廃棄物の
処理装置は、繊維性の有機性廃棄物分を含む有機性廃棄
物の処理装置であって、有機性廃棄物が導入されるメタ
ン発酵槽と、該メタン発酵槽から引き抜いた汚泥を濃縮
する汚泥濃縮手段と、該汚泥濃縮手段の濃縮汚泥をメタ
ン発酵槽に返送する汚泥返送手段とを備えてなる有機性
廃棄物の処理装置において、該汚泥濃縮手段に有機性廃
棄物のうちの繊維性の有機性廃棄物分を添加する手段を
設けたことを特徴とする。An apparatus for treating organic waste according to the present invention is an apparatus for treating organic waste containing a fibrous organic waste component, in which organic waste is introduced. An organic waste treatment apparatus comprising a methane fermentation tank, sludge concentration means for condensing sludge extracted from the methane fermentation tank, and sludge return means for returning the concentrated sludge from the sludge concentration means to the methane fermentation tank Wherein the sludge concentration means is provided with means for adding a fibrous organic waste portion of the organic waste.
【０００６】本発明の有機性廃棄物の処理装置では、メ
タン発酵槽から引き抜いた汚泥に有機性廃棄物のうちの
繊維性のものを混合することにより、汚泥の濃縮性を高
めることができる。[0006] In the organic waste treatment apparatus of the present invention, the concentration of the sludge can be enhanced by mixing the fibrous organic waste with the sludge extracted from the methane fermentation tank.
【０００７】この繊維性の有機性廃棄物は、本来メタン
発酵による分解が可能な廃棄物であるが、汚泥の濃縮の
ための添加材として汚泥濃縮手段に添加し、濃縮汚泥の
一部としてメタン発酵槽に返送しても、これをメタン発
酵槽に直接添加する場合と同様に分解することができ
る。This fibrous organic waste is a waste that can be decomposed by methane fermentation. However, it is added to sludge concentration means as an additive for sludge concentration, and methane is used as a part of the concentrated sludge. Even when it is returned to the fermenter, it can be decomposed as in the case where it is directly added to the methane fermenter.
【０００８】[0008]
【発明の実施の形態】以下に図面を参照して本発明の実
施の形態を詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【０００９】図１は本発明の有機性廃棄物の処理装置の
実施の形態を示す系統図である。FIG. 1 is a system diagram showing an embodiment of an organic waste treatment apparatus according to the present invention.
【００１０】本発明の有機性廃棄物の処理装置では、図
１に示す如く、有機性廃棄物のメタン発酵槽１から引き
抜いた汚泥に有機性廃棄物のうちの繊維性のものの少な
くとも一部を混合して汚泥濃縮機２にて汚泥の濃縮を行
い、得られた濃縮汚泥をメタン発酵槽１に返送する。In the organic waste treatment apparatus of the present invention, as shown in FIG. 1, at least a part of the organic waste fibrous material is removed from the methane fermentation tank 1 of the organic waste. The mixed sludge is concentrated by the sludge concentrator 2, and the obtained concentrated sludge is returned to the methane fermentation tank 1.
【００１１】本発明において、処理対象とする有機性廃
棄物としては、水処理工程において発生する有機性汚
泥、家庭、食堂等で発生する生ゴミ、厨芥、各種工場、
施設から排出される有機性廃液、有機性固形廃棄物など
が挙げられる。これらの有機性廃棄物のなかには、古
紙、剪定材、オガ屑などの天然物由来の繊維性の有機性
廃棄物がある。本発明では、有機性廃棄物のうちのこの
ような繊維性の有機性廃棄物の少なくとも一部をメタン
発酵槽ではなく、汚泥濃縮機に直接添加してメタン発酵
汚泥との濃縮汚泥の一部としてメタン発酵槽に返送す
る。In the present invention, the organic waste to be treated includes organic sludge generated in a water treatment process, garbage generated in homes, canteens, kitchen waste, various factories,
Organic waste liquid and organic solid waste discharged from the facility can be mentioned. Among these organic wastes are fibrous organic wastes of natural origin, such as waste paper, pruners, sawdust and the like. In the present invention, at least a part of such a fibrous organic waste among the organic waste is not added to the methane fermentation tank, but is added directly to the sludge concentrator, and a part of the concentrated sludge with the methane fermentation sludge And returned to the methane fermentation tank.
【００１２】発酵汚泥に混合する繊維性の有機性廃棄物
としては、メタン発酵による生分解が可能で、かつ汚泥
の濃縮性を向上させる繊維性のものが好ましく、破砕し
た古紙などが挙げられるが、その他に農産物由来の繊維
性の有機性廃棄物や剪定材、オガ屑なども有用である。
これらの繊維性の有機性廃棄物の大きさが大きい場合に
は、破砕機や粉砕機などで数ミリから数センチ程度の大
きさに砕いて用いることが好ましい。なお、繊維性の有
機性廃棄物は、水分が少ないものであることが好まし
く、望ましくは含水率５０％以下である。The fibrous organic waste to be mixed with the fermented sludge is preferably a fibrous organic waste that can be biodegraded by methane fermentation and improves the sludge's concentrating properties, such as crushed waste paper. Besides, fibrous organic waste, pruning materials, sawdust and the like derived from agricultural products are also useful.
When the size of these fibrous organic wastes is large, it is preferable to use them by crushing them to a size of several millimeters to several centimeters using a crusher or a crusher. The fibrous organic waste preferably has a low water content, and preferably has a water content of 50% or less.
【００１３】本発明において、メタン発酵槽１内に投入
された有機性廃棄物は、含有される有機物が嫌気性菌に
よって、メタン、炭酸ガスに分解され、メタン発酵槽１
の発酵汚泥は汚泥濃縮機２にて、繊維性の有機性廃棄物
が添加されて濃縮され、分離液と濃縮汚泥に分けられ
る。分離液は系外へ排出され、濃縮汚泥はメタン発酵槽
１に返送される。In the present invention, organic waste contained in the methane fermenter 1 is decomposed into methane and carbon dioxide by anaerobic bacteria, and the organic waste contained therein is decomposed.
The fermented sludge is concentrated by adding a fibrous organic waste in a sludge concentrator 2, and is separated into a separated liquid and a concentrated sludge. The separated liquid is discharged out of the system, and the concentrated sludge is returned to the methane fermentation tank 1.
【００１４】ここで、メタン発酵槽１としては、有機性
廃棄物の処理槽として従来から知られている任意の嫌気
性消化槽が使用できる。例えばガス撹拌式、機械撹拌
式、循環撹拌式など固形物濃度に応じて任意の嫌気性消
化槽が使用できる。このメタン発酵槽１における消化温
度は３０〜４０℃の中温嫌気でも、５０〜６０℃の高温
嫌気でもよい。また、消化滞留時間は、処理対象有機性
廃棄物や汚泥濃度によっても変わるが通常の場合１０〜
３０日程度でよい。Here, as the methane fermentation tank 1, any anaerobic digestion tank conventionally known as an organic waste treatment tank can be used. For example, any anaerobic digestion tank can be used depending on the solid concentration, such as a gas stirring system, a mechanical stirring system, and a circulation stirring system. The digestion temperature in the methane fermentation tank 1 may be 30 to 40 ° C middle anaerobic or 50 to 60 ° C high temperature anaerobic. In addition, the digestion retention time varies depending on the organic waste to be treated and the sludge concentration, but is usually 10 to 10.
It may be about 30 days.
【００１５】メタン発酵槽１内の汚泥濃度は例えば３〜
２０％で運転されるが、本発明では汚泥濃縮機２からの
濃縮汚泥濃度を高めることができるので、メタン発酵槽
１内の汚泥濃度を容易に高めることができることから、
汚泥濃度５％以上で運転するのが好ましい。本発明で
は、このように、高濃縮汚泥を返送することで、メタン
発酵槽１内の汚泥濃度を高く維持し、有機性廃棄物の分
解率を向上させることができる。The sludge concentration in the methane fermentation tank 1 is, for example, 3 to
Although the operation is performed at 20%, in the present invention, the concentration of the sludge from the sludge concentrator 2 can be increased, so that the concentration of the sludge in the methane fermentation tank 1 can be easily increased.
It is preferable to operate at a sludge concentration of 5% or more. In the present invention, by returning the highly concentrated sludge as described above, the sludge concentration in the methane fermentation tank 1 can be maintained at a high level, and the decomposition rate of organic waste can be improved.
【００１６】このメタン発酵槽１への汚泥濃縮機２から
の濃縮汚泥の汚泥返送比は、汚泥濃度にもよるが、通常
は、メタン発酵槽１に導入される有機性廃棄物量の０．
５〜３倍程度とされる。The sludge return ratio of the concentrated sludge from the sludge concentrator 2 to the methane fermentation tank 1 depends on the sludge concentration, but is usually 0.1% of the amount of organic waste introduced into the methane fermentation tank 1.
It is about 5 to 3 times.
【００１７】この汚泥濃縮機２からメタン発酵槽１に返
送される濃縮汚泥中の繊維性の有機性廃棄物は、メタン
発酵槽１において、他の有機性廃棄物と共にメタン発酵
され、分解される。本発明においては、このように、単
位重量当りの有機物含有量が多く、メタン発酵によるメ
タン生成量の多い古紙等の繊維性の固形有機性廃棄物を
も効率的にメタン発酵分解できるため、メタン発生量を
高めることができ、エネルギー回収の面で極めて有利で
ある。The fibrous organic waste in the concentrated sludge returned from the sludge concentrator 2 to the methane fermentation tank 1 is methane fermented together with other organic waste in the methane fermentation tank 1 and decomposed. . In the present invention, as described above, the organic matter content per unit weight is large, and fibrous solid organic waste such as waste paper having a large amount of methane produced by methane fermentation can be efficiently decomposed by methane fermentation. The amount of generation can be increased, which is extremely advantageous in terms of energy recovery.
【００１８】本発明において、汚泥を濃縮する汚泥濃縮
機２としても、従来から知られている任意の汚泥濃縮手
段を採用することができ、例えば、スクリュープレス、
遠心分離機、回転円板式汚泥濃縮機などを用いることが
できる。本発明においては、繊維性の有機性廃棄物の添
加で汚泥の濃縮性を高めることができることから、汚泥
濃縮機の小型化を図ることができ、また、スクリュープ
レスなどの遠心分離機よりも消費電力の小さいものを用
いることもできる。In the present invention, any conventionally known sludge thickening means can be adopted as the sludge thickener 2 for thickening sludge.
A centrifugal separator, a rotating disk type sludge concentrator and the like can be used. In the present invention, the addition of fibrous organic waste can increase the concentration of sludge, so that the sludge concentrator can be reduced in size and consumed more than a centrifugal separator such as a screw press. It is also possible to use one with low power.
【００１９】汚泥濃縮機２においては、発酵汚泥に添加
された繊維性の有機性廃棄物が発酵汚泥の脱水性を改善
し、これにより固液分離性が高められ、濃縮性が向上す
る。通常の場合、本発明の有機性廃棄物の処理装置によ
れば、汚泥濃縮機２において、約５〜２５％程度にまで
汚泥を濃縮することができる。In the sludge concentrator 2, the fibrous organic waste added to the fermented sludge improves the dewatering property of the fermented sludge, thereby improving the solid-liquid separation property and the concentrating property. In a normal case, according to the organic waste treatment apparatus of the present invention, the sludge concentrator 2 can concentrate sludge to about 5 to 25%.
【００２０】汚泥濃縮機２に添加する繊維性の有機性廃
棄物の添加量には特に制限はないが、通常の場合、メタ
ン発酵槽１に導入される有機性廃棄物の固形物量に対し
て、汚泥濃縮機２に添加される繊維性の有機性廃棄物の
固形物量が５〜３０％程度となるような割合とするのが
好ましい。The amount of the fibrous organic waste to be added to the sludge concentrator 2 is not particularly limited, but is usually relative to the solid amount of the organic waste introduced into the methane fermenter 1. Preferably, the ratio is such that the solid matter amount of the fibrous organic waste added to the sludge concentrator 2 is about 5 to 30%.
【００２１】[0021]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically below with reference to examples and comparative examples.
【００２２】実施例１ 図１に示す本発明の有機性廃棄物の処理装置により、下
記容量の有機性廃棄物を処理した。Example 1 The following volume of organic waste was treated by the organic waste treatment apparatus of the present invention shown in FIG.
【００２３】 有機性廃棄物：生ごみ１０００ｋｇ／日（固形物２００ｋｇ／日） 汚泥 １０００ｋｇ／日（固形物１００ｋｇ／日） 古紙 ５０ｋｇ／日（固形物４８ｋｇ／日，含水率４％） まず、生ごみと汚泥を混合し、固形物濃度が１０％にな
るように水を１０００ｋｇ／日加えて水分調整し、容量
６０ｍ3のメタン発酵槽（槽内温度５２℃）に全量で３
０００ｋｇ／日の投入を行った。即ち、滞留時間は２０
日である。Organic waste: garbage 1000 kg / day (solids 200 kg / day) Sludge 1000 kg / day (solids 100 kg / day) Waste paper 50 kg / day (solids 48 kg / day, moisture content 4%) the dust and sludge are mixed, the addition of water 1000 kg / day as solid concentration becomes 10% by moisture control, 3 in a total volume of the methane fermentation tank volume 60 m 3 (chamber temperature 52 ° C.)
000 kg / day was introduced. That is, the residence time is 20
Day.
【００２４】このメタン発酵槽から５５００ｋｇ／日の
汚泥を引き抜いた。引き抜いた汚泥の濃度は６％であっ
た。この汚泥に５ｍｍ程度の大きさに破砕した古紙５０
ｋｇ／日を混合してスクリュープレスにより汚泥濃縮を
行った。ＳＳ回収率は９５％であった。5500 kg / day of sludge was extracted from the methane fermentation tank. The concentration of the extracted sludge was 6%. Used paper 50 crushed to this sludge to a size of about 5 mm
kg / day were mixed and concentrated with a screw press. SS recovery was 95%.
【００２５】この操作により分離液２５００ｋｇ／日が
得られた。約１２％に濃縮された汚泥３０００ｋｇ／日
はメタン発酵槽に返送した。By this operation, 2500 kg / day of the separated liquid was obtained. 3000 kg / day of sludge concentrated to about 12% was returned to the methane fermentation tank.
【００２６】なお、メタン発酵槽内の汚泥濃度を６％に
維持するために槽内汚泥５００ｋｇ／日にはポリマーを
添加して別途スクリュープレスで含水率７５％まで脱水
して系外に排出した。In order to maintain the sludge concentration in the methane fermentation tank at 6%, a polymer was added to 500 kg / day of sludge in the tank and dewatered to a water content of 75% by a separate screw press and discharged out of the system. .
【００２７】メタン発酵槽内に保持される汚泥量（固形
物）３６００ｋｇに対してメタン発酵の系外に排出され
た汚泥（固形物）は４６．５ｋｇ／日で、汚泥の滞留日
数は水の滞留日数２０日に対して７７．４日が維持され
た。The amount of sludge (solids) discharged out of the methane fermentation system was 46.5 kg / day with respect to the amount of sludge (solids) held in the methane fermentation tank of 3600 kg. 77.4 days were maintained for 20 days in residence.
【００２８】本実施例では、汚泥の滞留日数が長いこと
から古紙のセルロース成分などの分解も可能となり、メ
タン発酵槽からは１５０ｍ3 ／日のバイオガス（メタン
濃度６５％）を得ることができた。In the present embodiment, since the sludge stays for a long time, the cellulose component of the waste paper can be decomposed, and 150 m 3 / day of biogas (methane concentration 65%) can be obtained from the methane fermentation tank. Was.
【００２９】比較例１ 図２に示す従来の有機性廃棄物の処理装置により、下記
容量の有機性廃棄物を処理した。Comparative Example 1 The following volume of organic waste was treated by the conventional organic waste treatment apparatus shown in FIG.
【００３０】 有機性廃棄物：生ごみ１０００ｋｇ／日（固形物２００ｋｇ／日） 汚泥 １０００ｋｇ／日（固形物１００ｋｇ／日） 生ごみと汚泥を混合し、固形物濃度が１０％になるよう
に水を１０００ｋｇ／日加えて水分調整し、容量６０ｍ
3 のメタン発酵槽（槽内温度５２℃）に全量で３０００
ｋｇ／日の投入を行った。即ち、滞留時間は２０日であ
る。Organic waste: garbage 1000 kg / day (solids 200 kg / day) Sludge 1000 kg / day (solids 100 kg / day) Raw garbage and sludge are mixed, and water is adjusted to a solid concentration of 10%. To adjust the water content by adding 1000 kg / day,
Methane fermentation tank 3 3000 in a total volume of the (internal temperature 52 ° C. bath)
kg / day was introduced. That is, the residence time is 20 days.
【００３１】このメタン発酵槽から７５００ｋｇ／日の
汚泥を引き抜き、遠心濃縮機により汚泥濃縮を行った。
引き抜いた汚泥の濃度は６％で、遠心濃縮機により９％
に濃縮され、ＳＳ回収率は８０％であった。7,500 kg / day of sludge was withdrawn from the methane fermentation tank, and concentrated by a centrifugal concentrator.
The concentration of the extracted sludge is 6%, 9% by centrifugal concentrator
And the SS recovery was 80%.
【００３２】この操作により分離液２５００ｋｇ／日が
得られた。約９％に濃縮された汚泥５０００ｋｇ／日は
メタン発酵槽に返送した。By this operation, 2500 kg / day of the separated liquid was obtained. 5000 kg / day of sludge concentrated to about 9% was returned to the methane fermentation tank.
【００３３】メタン発酵槽内の汚泥濃度を６％に維持す
るために槽内汚泥５００ｋｇ／日にはポリマーを添加し
て別途スクリュープレスで含水率７５％まで脱水して系
外に排出した。In order to maintain the sludge concentration in the methane fermentation tank at 6%, a polymer was added to 500 kg / day of sludge in the tank, and dewatered by a screw press to a water content of 75%, and discharged out of the system.
【００３４】メタン発酵槽内に保持される汚泥量（固形
物）３６００ｋｇに対してメタン発酵の系外に排出され
た汚泥（固形物）は１２０ｋｇ／日で、汚泥の滞留日数
は水の滞留日数２０日に対して３０日であった。また、
メタン発酵槽からのバイオガス量は１３０ｍ3 ／日（メ
タン濃度６５％）であった。The amount of sludge (solids) discharged out of the methane fermentation system is 120 kg / day with respect to the amount of sludge (solids) held in the methane fermentation tank of 3600 kg, and the number of days of sludge retention is the number of days of water retention 30 days versus 20 days. Also,
The amount of biogas from the methane fermentation tank was 130 m 3 / day (methane concentration 65%).
【００３５】[0035]
【発明の効果】以上詳述した通り、本発明の有機性廃棄
物の処理装置によれば、 汚泥濃縮操作において、濃縮率を高くできるため、
所定の分離液を得るために濃縮機にかける汚泥量が少な
くて済む。従って、濃縮機を小型化できる。 汚泥濃縮機でのＳＳ回収率が向上する。 ，より消費電力の大きな遠心濃縮機に限らず、
スクリュープレスなどの消費電力の小さな濃縮機も適用
可能となる。 古紙などの有機性廃棄物を汚泥濃縮に利用した上で
メタン発生量を増大させることができるため、メタン発
酵で発生させたメタンガスをガス発電やボイラ等に有効
利用する場合などにおいて、効率的なエネルギー回収を
行える。即ち、固形有機性廃棄物は有機性廃液に比べて
単位重量当りの有機物含有量が多く、従って、固形有機
性廃棄物を効率的に処理することで有機性廃棄物当りの
メタン生成量が多くなる。といった効果が奏され、工業
的に極めて有利である。As described in detail above, according to the organic waste treatment apparatus of the present invention, the concentration rate can be increased in the sludge concentration operation.
The amount of sludge applied to the concentrator in order to obtain a predetermined separated liquid can be reduced. Therefore, the concentrator can be downsized. The SS recovery rate in the sludge concentrator is improved. ， Not limited to centrifugal concentrators with higher power consumption,
A concentrator with small power consumption such as a screw press can also be applied. Since organic waste such as waste paper can be used for sludge concentration and the amount of methane generated can be increased, efficient use of methane gas generated by methane fermentation in gas power generation and boilers is effective. Energy recovery can be performed. That is, the solid organic waste has a higher organic matter content per unit weight than the organic waste liquid, and therefore, by efficiently processing the solid organic waste, the amount of methane generated per organic waste is larger. Become. This is extremely advantageous industrially.
【図１】本発明の有機性廃棄物の処理装置の実施の形態
を示す系統図である。FIG. 1 is a system diagram showing an embodiment of an organic waste treatment apparatus of the present invention.
【図２】従来の有機性廃棄物の処理装置を示す系統図で
ある。FIG. 2 is a system diagram showing a conventional organic waste treatment apparatus.
１ メタン発酵槽 ２ 汚泥濃縮機 ３ 遠心濃縮機 1 Methane fermentation tank 2 Sludge concentrator 3 Centrifugal concentrator
Claims (1)
棄物の処理装置であって、有機性廃棄物が導入されるメ
タン発酵槽と、該メタン発酵槽から引き抜いた汚泥を濃
縮する汚泥濃縮手段と、該汚泥濃縮手段の濃縮汚泥をメ
タン発酵槽に返送する汚泥返送手段とを備えてなる有機
性廃棄物の処理装置において、 該汚泥濃縮手段に有機性廃棄物のうちの繊維性の有機性
廃棄物分を添加する手段を設けたことを特徴とする有機
性廃棄物の処理装置。An apparatus for treating organic waste containing fibrous organic waste, comprising: a methane fermentation tank into which organic waste is introduced; and a sludge extracted from the methane fermentation tank. An apparatus for treating organic waste, comprising: a sludge thickening means; and a sludge return means for returning the concentrated sludge of the sludge thickening means to the methane fermentation tank. An organic waste treatment apparatus, comprising: means for adding an organic waste component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP159398A JP3915217B2 (en) | 1998-01-07 | 1998-01-07 | Organic waste treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP159398A JP3915217B2 (en) | 1998-01-07 | 1998-01-07 | Organic waste treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11197697A true JPH11197697A (en) | 1999-07-27 |
| JP3915217B2 JP3915217B2 (en) | 2007-05-16 |
Family
ID=11505818
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP159398A Expired - Fee Related JP3915217B2 (en) | 1998-01-07 | 1998-01-07 | Organic waste treatment equipment |
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| Country | Link |
|---|---|
| JP (1) | JP3915217B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002045896A (en) * | 2000-08-03 | 2002-02-12 | Chikusan Kankyo Hozen Gijutsu Kenkyu Kumiai | Method for starting up dry process methane fermentation |
| JP2004033828A (en) * | 2002-06-28 | 2004-02-05 | Public Works Research Institute | Biogas resources recovering method |
| JP2004290729A (en) * | 2003-03-25 | 2004-10-21 | Kurita Water Ind Ltd | Apparatus for digestion treatment of organic waste liquid |
| JP2011212592A (en) * | 2010-03-31 | 2011-10-27 | Hitachi Zosen Corp | Method for preparing biomass feedstock originated from waste |
-
1998
- 1998-01-07 JP JP159398A patent/JP3915217B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002045896A (en) * | 2000-08-03 | 2002-02-12 | Chikusan Kankyo Hozen Gijutsu Kenkyu Kumiai | Method for starting up dry process methane fermentation |
| JP4547782B2 (en) * | 2000-08-03 | 2010-09-22 | 栗田工業株式会社 | How to start dry methane fermentation |
| JP2004033828A (en) * | 2002-06-28 | 2004-02-05 | Public Works Research Institute | Biogas resources recovering method |
| JP2004290729A (en) * | 2003-03-25 | 2004-10-21 | Kurita Water Ind Ltd | Apparatus for digestion treatment of organic waste liquid |
| JP2011212592A (en) * | 2010-03-31 | 2011-10-27 | Hitachi Zosen Corp | Method for preparing biomass feedstock originated from waste |
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| Publication number | Publication date |
|---|---|
| JP3915217B2 (en) | 2007-05-16 |
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