JPH0663598A - Anaerobic treatment of organic waste - Google Patents
Anaerobic treatment of organic wasteInfo
- Publication number
- JPH0663598A JPH0663598A JP23411192A JP23411192A JPH0663598A JP H0663598 A JPH0663598 A JP H0663598A JP 23411192 A JP23411192 A JP 23411192A JP 23411192 A JP23411192 A JP 23411192A JP H0663598 A JPH0663598 A JP H0663598A
- Authority
- JP
- Japan
- Prior art keywords
- anaerobic digestion
- digestion
- sludge
- organic waste
- anaerobic
- 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
- 239000010815 organic waste Substances 0.000 title claims description 17
- 230000029087 digestion Effects 0.000 claims abstract description 62
- 239000010802 sludge Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 16
- 244000005700 microbiome Species 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 17
- 239000005416 organic matter Substances 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000000354 decomposition reaction Methods 0.000 description 9
- 238000005119 centrifugation Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000001079 digestive effect Effects 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 229920006317 cationic polymer Polymers 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000010806 kitchen waste Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000004927 wastewater treatment sludge Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Landscapes
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、有機性廃棄物の嫌気性
消化処理方法に係り、特に下・廃水処理過程から排出さ
れる有機性汚泥、各種製造工程からの高濃度有機性廃
液、厨芥，食品廃棄物等の有機性廃棄物の消化処理に際
し、消化槽内に消化に関与する微生物を高濃度に保持し
て行う嫌気性消化処理方法関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for anaerobic digestion of organic waste, particularly organic sludge discharged from a lower / wastewater treatment process, a high-concentration organic waste liquid from various manufacturing processes, and kitchen waste. The present invention relates to an anaerobic digestion treatment method in which digestive treatment of organic waste such as food waste is carried out while maintaining a high concentration of microorganisms involved in digestion in the digestion tank.
【０００２】[0002]
【従来の技術】有機性廃棄物の処理方法の１つに、嫌気
性消化法が知られている。しかし、この方法は嫌気性消
化槽の加温を要し、消化槽温度３０〜５５℃において
も、消化日数に１５〜４０日の長期間を要し、有機物分
解率は６０％以下にとどまっている。この方法では、消
化槽を加温しなければ、有機物分解率は、もっと低い値
にとどまる。とりわけ完全混合型の嫌気性消化槽におい
ては、有機性廃棄物及び嫌気性消化反応に関わる微生物
群の滞留時間は同じであり、微生物群を消化反応系内に
高濃度に保持し、かつ、有機性廃棄物よりも長時間滞留
させる技術はとられていない。2. Description of the Related Art An anaerobic digestion method is known as one of the methods for treating organic waste. However, this method requires heating of the anaerobic digestion tank, and even when the digestion tank temperature is 30 to 55 ° C., it takes 15 to 40 days for digestion, and the decomposition rate of organic matter remains below 60%. There is. In this method, the organic matter decomposition rate remains at a lower value unless the digester is heated. Especially in the completely mixed type anaerobic digester, the retention time of the organic waste and the microbial group involved in the anaerobic digestion reaction is the same, the microbial group is maintained at a high concentration in the digestion reaction system, and There is no technology to retain the waste for a longer period of time.
【０００３】[0003]
【発明が解決しようとする課題】上記のように、従来の
有機性廃棄物の嫌気性消化法では、消化日数の短縮化
と、有機物分解率の向上が問題となる。本発明は、嫌気
性消化反応に関わる微生物群を、系内に高濃度に保持す
ることにより、消化日数の短縮化、有機物分解率の向上
を導くことのできる有機性廃棄物の嫌気性消化処理方法
を提供することを課題とする。As described above, in the conventional anaerobic digestion method of organic waste, there are problems of shortening the digestion days and improving the decomposition rate of organic matter. The present invention is an anaerobic digestion treatment of organic waste which can shorten the digestion days and improve the decomposition rate of organic matter by maintaining a high concentration of microorganisms involved in the anaerobic digestion reaction in the system. The challenge is to provide a method.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に、本発明では、有機性廃棄物を嫌気性消化工程で処理
するに際して、嫌気性消化工程から汚泥の一部を引き抜
いて遠心分離し、得られる濃縮汚泥を前記嫌気性消化工
程に返送することを特徴とする有機性廃棄物の嫌気性消
化処理方法としたものである。このように微生物群を反
応系内に高濃度に保持する手段として、本発明では、嫌
気性消化液を遠心分離し、得られる濃縮汚泥を、嫌気性
消化槽に返送する。In order to solve the above problems, in the present invention, when treating an organic waste in an anaerobic digestion step, a part of sludge is extracted from the anaerobic digestion step and centrifuged. The obtained concentrated sludge is returned to the anaerobic digestion step, which is a method for anaerobic digestion of organic waste. In the present invention, the anaerobic digestion liquid is centrifuged and the concentrated sludge obtained is returned to the anaerobic digestion tank as a means for keeping the microorganisms in the reaction system at a high concentration.
【０００５】すなわち、本発明は、従来技術のように、
消化反応系内における、有機性廃棄物と、消化反応に関
わる微生物群の滞留時間が同じではなく、遠心分離法を
併用することにより、微生物群の滞留時間を著しく長く
することができ、系内に高濃度に保持することが可能と
なる。このために、従来に比して短い消化日数におい
て、高い有機物分解率を得ることができる。また、遠心
分離法との併用により未分解の有機性廃棄物が反復し
て、消化反応系内に滞留せしめられることも、高い有機
物分解率を導く。That is, the present invention, like the prior art,
In the digestion reaction system, the residence time of the organic waste and the microorganisms involved in the digestion reaction are not the same, and the combined use of the centrifugation method can significantly increase the residence time of the microorganisms. It is possible to maintain a high concentration. Therefore, it is possible to obtain a high organic matter decomposition rate in a shorter number of digestion days than in the past. Further, the combined use with the centrifugal separation method causes the undecomposed organic waste to be repeatedly accumulated and retained in the digestion reaction system, which leads to a high decomposition rate of the organic matter.
【０００６】本発明のフローシートを図１に示す。図１
において、有機性廃棄物１は嫌気性消化槽２に投入さ
れ、消化液３は遠心分離機４に導かれる。遠心分離によ
って分離液５と濃縮汚泥６が得られ、分離液５は系外に
放出され、濃縮汚泥６は、再び嫌気性消化槽２に返送さ
れる。嫌気性消化槽内濃度が、その攪拌操作から判断し
て上限と考えられる濃度（約６％）に達すれば、余剰汚
泥７が系外に放出される。A flow sheet of the present invention is shown in FIG. Figure 1
In, the organic waste 1 is put into the anaerobic digestion tank 2, and the digested liquid 3 is guided to the centrifuge 4. The separated liquid 5 and the concentrated sludge 6 are obtained by centrifugation, the separated liquid 5 is discharged to the outside of the system, and the concentrated sludge 6 is returned to the anaerobic digestion tank 2 again. When the concentration in the anaerobic digester reaches the upper limit concentration (about 6%) judged from the stirring operation, the excess sludge 7 is discharged to the outside of the system.
【０００７】[0007]
【作用】嫌気性消化液を遠心分離し、得られる濃縮汚泥
を、嫌気性消化槽に返送することにより嫌気性消化反応
に関わる微生物群を消化反応系内に高濃度に保持するこ
とが可能となり、消化日数の短縮化及び有機物分解率の
向上という効果をもたらす。また、従来程度の有機物分
解ならば、従来よりも低い温度での消化反応によって達
成される。[Function] By centrifuging the anaerobic digestion liquid and returning the concentrated sludge obtained to the anaerobic digestion tank, it becomes possible to maintain a high concentration of microorganisms involved in the anaerobic digestion reaction in the digestion reaction system. The effect of shortening the number of digestive days and improving the decomposition rate of organic matter is brought about. In addition, decomposition of organic matter to a conventional degree can be achieved by a digestion reaction at a lower temperature than before.
【０００８】[0008]
【実施例】以下、本発明を実施例により具体的に説明す
るが、本発明はこれに限定されない。 実施例１ 図１に従って、食品製造工程からの廃水を標準的な活性
汚泥処理する際に生じる余剰活性汚泥１（ＭＬＳＳ８，
３００ｍｇ／リットル，ＶＳＳ／ＳＳ；７４％）を、実
容積６リットルの３５℃に加温され内部を攪拌翼で完全
混合されている嫌気性消化実験槽２によって消化処理を
行った。液基準の滞留時間を１５日に設定したので、１
日あたりの交換液量（遠心分離液として系外に流出され
る量、投入有機物量の双方）は４００ｍｌである。消化
槽２の内液３：８５０ｍｌ／日を１，０００Ｇ−１０分
間遠心分離４し、遠心分離液５：４００ｍｌ／日と、濃
縮汚泥６：４５０ｍｌ／日を得、この濃縮汚泥６：４５
０ｍｌ／日と、余剰活性汚泥１：４００ｍｌ／日を、嫌
気性消化実験槽２に投入するという方法で、消化処理を
行った。なお、嫌気性消化実験槽内液の濃度が高くなる
につれて、遠心分離液４００ｍｌ／日を確保するに必要
な消化槽内液量３は増加した。EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto. Example 1 According to FIG. 1, surplus activated sludge 1 (MLSS8, generated when a standard activated sludge treatment of wastewater from a food manufacturing process is performed.
300 mg / liter, VSS / SS; 74%) was digested in an anaerobic digestion experiment tank 2 having an actual volume of 6 liters, which was heated to 35 ° C. and completely mixed inside with a stirring blade. Since the liquid-based residence time was set to 15 days, 1
The amount of exchange liquid per day (both the amount discharged as a centrifugal liquid out of the system and the amount of input organic matter) is 400 ml. The inner liquid 3: 850 ml / day of the digestion tank 2 was centrifuged 4 for 1,000 G-10 minutes to obtain 5: 400 ml / day of centrifuge liquid and 6: 450 ml / day of concentrated sludge.
Digestion treatment was carried out by introducing 0 ml / day and excess activated sludge 1: 400 ml / day into the anaerobic digestion experimental tank 2. In addition, as the concentration of the liquid in the anaerobic digestion experiment tank increased, the amount 3 of liquid in the digestion tank required to secure 400 ml / day of the centrifugal separation liquid increased.
【０００９】このような嫌気性消化を行ったところ、投
入する余剰活性汚泥１に含まれる有機物の５４．３％が
分解され、投入した、当該有機物１ｇあたり２４０ｍｌ
のメタンガスを回収することができた。そして、この場
合の嫌気性消化槽２からの余剰汚泥７をベルトプレス型
加圧脱水機により脱水したところ、カチオン系高分子凝
集剤注入率０．４６％対ＳＳで含水率８５．３％の脱水
ケーキを得た。When such anaerobic digestion was carried out, 54.3% of the organic matter contained in the excess activated sludge 1 to be introduced was decomposed, and 240 ml per 1 g of the introduced organic matter.
It was possible to recover the methane gas. Then, when the excess sludge 7 from the anaerobic digestion tank 2 in this case was dehydrated by a belt press type pressure dehydrator, a cationic polymer coagulant injection rate was 0.46% and SS was 85.3%. A dehydrated cake was obtained.
【００１０】比較例１ 従来の嫌気性消化方法を示すフローシートの図２に従っ
て、同じ投入余剰活性汚泥１を用い、実容積が８リット
ルである点を除いて同じ仕様の嫌気性消化実験槽２に、
同じく液基準の滞留時間を２０日として４００ｍｌ／日
投入し、消化槽内液３を４００ｍｌ／日引き抜くという
方法で消化処理を行ったところ、投入する余剰活性汚泥
１に含まれる有機物の３２．４％が分解され、投入した
当該有機物１ｇあたり１６２ｍｌのメタンガスを回収す
ることにとどまった。そして、この消化槽内液７を、同
じベルトプレス型加圧脱水機により脱水したところカチ
オン系高分子凝集剤注入率０．２８％対ＳＳで、含水率
８６．１％の脱水ケーキを得た。Comparative Example 1 According to FIG. 2 of a flow sheet showing a conventional anaerobic digestion method, an anaerobic digestion experimental tank 2 of the same specifications except that the same input surplus activated sludge 1 is used and the actual volume is 8 liters. To
Similarly, when the liquid-based residence time was set to 20 days, 400 ml / day was charged, and the digestion tank liquid 3 was withdrawn by 400 ml / day, and a digestion treatment was performed. As a result, 32.4 of organic substances contained in the surplus activated sludge 1 to be charged were added. % Was decomposed, and 162 ml of methane gas was recovered per 1 g of the charged organic substance. Then, this digestion tank liquid 7 was dehydrated by the same belt press type pressure dehydrator to obtain a dehydrated cake with a cationic polymer flocculant injection rate of 0.28% vs. SS and a water content of 86.1%. .
【００１１】[0011]
【発明の効果】産業廃水処理汚泥に代表されるような有
機性廃棄物の嫌気性消化処理において、嫌気性消化と、
遠心分離操作を複合することにより、嫌気性消化に関わ
る微生物群を、系外に高濃度に保持することができ、遠
心分離操作を伴わない従来の嫌気性消化処理法に比べて
消化日数の短縮化と有機物分解率の向上を得ることがで
きた。しかも、従来法に比べて、得られる消化汚泥の脱
水性を損うことはなかった。INDUSTRIAL APPLICABILITY In the anaerobic digestion treatment of organic waste represented by industrial wastewater treatment sludge, anaerobic digestion,
By combining the centrifugation operation, the microbial groups involved in anaerobic digestion can be kept at a high concentration outside the system, and the digestion days can be shortened compared to the conventional anaerobic digestion method that does not involve centrifugation. It was possible to obtain higher conversion rate and organic matter decomposition rate. Moreover, the dewatering property of the obtained digested sludge was not impaired as compared with the conventional method.
【図１】本発明の嫌気性消化方法を示すフローシートで
ある。FIG. 1 is a flow sheet showing the anaerobic digestion method of the present invention.
【図２】従来の嫌気性消化方法を示すフローシートであ
る。FIG. 2 is a flow sheet showing a conventional anaerobic digestion method.
１：有機性廃棄物、２：嫌気性消化槽、３：消化液、
４：遠心分離機、5:遠心分離液、６：（遠心）濃縮汚
泥、７：余剰汚泥1: Organic waste, 2: Anaerobic digester, 3: Digestive fluid,
4: Centrifuge, 5: Centrifuge, 6: (Centrifugal) concentrated sludge, 7: Excess sludge
Claims (1)
るに際して、嫌気性消化工程から汚泥の一部を引き抜い
て遠心分離し、得られる濃縮汚泥を前記嫌気性消化工程
に返送することを特徴とする有機性廃棄物の嫌気性消化
処理方法。1. When treating organic waste in an anaerobic digestion step, a part of sludge is extracted from the anaerobic digestion step and centrifuged, and the resulting concentrated sludge is returned to the anaerobic digestion step. A characteristic method for anaerobic digestion of organic waste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23411192A JP2641009B2 (en) | 1992-08-11 | 1992-08-11 | Anaerobic digestion of organic waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23411192A JP2641009B2 (en) | 1992-08-11 | 1992-08-11 | Anaerobic digestion of organic waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0663598A true JPH0663598A (en) | 1994-03-08 |
| JP2641009B2 JP2641009B2 (en) | 1997-08-13 |
Family
ID=16965808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23411192A Expired - Lifetime JP2641009B2 (en) | 1992-08-11 | 1992-08-11 | Anaerobic digestion of organic waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2641009B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001047003A (en) * | 1999-08-11 | 2001-02-20 | Ebara Corp | Treatment of organic waste |
| JP2001104999A (en) * | 1999-10-07 | 2001-04-17 | Kurita Water Ind Ltd | Treatment of organic waste |
| JP2004290729A (en) * | 2003-03-25 | 2004-10-21 | Kurita Water Ind Ltd | Apparatus for digestion treatment of organic waste liquid |
| JP2005254054A (en) * | 2004-03-09 | 2005-09-22 | Kawasaki Heavy Ind Ltd | Method and system for anaerobic digestion of organic sludge |
| JP2013188676A (en) * | 2012-03-13 | 2013-09-26 | Osaka Gas Co Ltd | Treatment method and apparatus for coffee lee |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57127498A (en) * | 1981-01-26 | 1982-08-07 | Takuma Sogo Kenkyusho:Kk | Anaerobic digesting tank |
| JPS6422400A (en) * | 1987-07-18 | 1989-01-25 | Kajima Corp | Waste water treatment |
-
1992
- 1992-08-11 JP JP23411192A patent/JP2641009B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57127498A (en) * | 1981-01-26 | 1982-08-07 | Takuma Sogo Kenkyusho:Kk | Anaerobic digesting tank |
| JPS6422400A (en) * | 1987-07-18 | 1989-01-25 | Kajima Corp | Waste water treatment |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001047003A (en) * | 1999-08-11 | 2001-02-20 | Ebara Corp | Treatment of organic waste |
| JP2001104999A (en) * | 1999-10-07 | 2001-04-17 | Kurita Water Ind Ltd | Treatment of organic waste |
| JP2004290729A (en) * | 2003-03-25 | 2004-10-21 | Kurita Water Ind Ltd | Apparatus for digestion treatment of organic waste liquid |
| JP2005254054A (en) * | 2004-03-09 | 2005-09-22 | Kawasaki Heavy Ind Ltd | Method and system for anaerobic digestion of organic sludge |
| JP2013188676A (en) * | 2012-03-13 | 2013-09-26 | Osaka Gas Co Ltd | Treatment method and apparatus for coffee lee |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2641009B2 (en) | 1997-08-13 |
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