JP2000282071A - Method and apparatus for producing dry matter from wet organic waste - Google Patents
Method and apparatus for producing dry matter from wet organic wasteInfo
- Publication number
- JP2000282071A JP2000282071A JP11082755A JP8275599A JP2000282071A JP 2000282071 A JP2000282071 A JP 2000282071A JP 11082755 A JP11082755 A JP 11082755A JP 8275599 A JP8275599 A JP 8275599A JP 2000282071 A JP2000282071 A JP 2000282071A
- Authority
- JP
- Japan
- Prior art keywords
- waste
- exhaust gas
- methane
- organic waste
- methane fermentation
- 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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
Landscapes
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
(57)【要約】
【課題】 湿潤有機性廃棄物を臭気対策、廃水対策を講
じながら、効率よく処理し乾燥物を製造する。
【解決手段】 (a) 湿潤有機性廃棄物をメタン発酵
槽10に導入してメタンガスを発生させるメタン発酵工
程、(b) メタンガスを燃焼させ燃焼排ガスをガスタ
ービン発電機12に導入する発電工程、(c) メタン
発酵処理廃棄物を脱水する脱水工程、(d) 脱水廃棄
物とガスタービン発電機12からの排ガスとを接触させ
る乾燥工程、(e) 脱水廃液を好気性微生物処理する
生物処理工程、(f) 生物処理装置18からの処理液
を導入して処理水と余剰汚泥とに分離する固液分離工
程、(g) 余剰汚泥と、乾燥工程からの排ガスとを接
触させる接触乾燥工程を含むようにする。
(57) [Summary] [PROBLEMS] To efficiently treat wet organic waste while taking measures against odor and wastewater to produce a dry product. SOLUTION: (a) A methane fermentation step of introducing humid organic waste into a methane fermentation tank 10 to generate methane gas, (b) a power generation step of burning methane gas and introducing combustion exhaust gas into a gas turbine generator 12. (C) a dehydration step of dehydrating the methane fermentation treatment waste, (d) a drying step of bringing the dehydration waste into contact with exhaust gas from the gas turbine generator 12, and (e) a biological treatment step of treating the dehydration waste liquid with an aerobic microorganism. (F) a solid-liquid separation step of introducing a treatment liquid from the biological treatment device 18 to separate the treated water and excess sludge, and (g) a contact drying step of contacting excess sludge with exhaust gas from the drying step. Include.
Description
【0001】[0001]
【発明の属する技術分野】本発明は、家畜ふん尿、下水
汚泥、食品粕等の湿潤有機性廃棄物から乾燥物を製造す
る方法及び装置、詳しくは、湿潤有機性廃棄物のメタン
発酵を伴う乾燥処理方法及び装置であって、臭気対策及
び廃水対策を講じながら効率的に乾燥物を製造する方法
及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a dried product from wet organic waste such as livestock manure, sewage sludge, and food waste, and more particularly, to a method for drying wet organic waste with methane fermentation. The present invention relates to a method and an apparatus for efficiently producing a dried product while taking measures against odor and wastewater.
【0002】[0002]
【従来の技術】従来、畜産し尿処理としては、メタン発
酵させた後、固形物と液体に分離し、固形物は産業廃棄
物として処分し、液体は活性汚泥法等の水処理を行った
後排出する方法が一般的であるが、脱水固形物の処理費
用が嵩み、かつ、処理方法も現在容易でなくなってきて
いる。メタン発酵により発生したメタンは発酵槽の加熱
用に一部利用する程度で、小規模の装置では利用するこ
とが難しく、燃焼処理しているケースが多かった。2. Description of the Related Art Conventionally, for livestock excreta treatment, after methane fermentation, solids and liquids are separated, solids are disposed of as industrial waste, and liquids are subjected to water treatment such as activated sludge method. The method of discharging is generally used, but the processing cost of the dehydrated solid is increased, and the processing method is not easy at present. Methane generated by methane fermentation was only partially used for heating the fermenter, and it was difficult to use it with a small-scale device, and combustion was often performed.
【0003】従来から、家畜ふん尿、下水汚泥等の湿潤
有機性廃棄物を乾燥機で乾燥させ、乾燥固形物を燃料や
肥料等として利用する処理が知られている。例えば、特
開平8−176568号公報に記載されているように、
湿潤下水汚泥を乾燥処理した乾燥汚泥とプラスチック
ス、必要により生石灰等とを混練しながら加熱し、つい
で、所定形状に成形する燃料の製造方法が知られてい
る。Conventionally, there has been known a treatment in which wet organic waste such as livestock manure and sewage sludge is dried by a dryer, and the dried solid is used as fuel, fertilizer, or the like. For example, as described in JP-A-8-176568,
2. Description of the Related Art There is known a method for producing a fuel in which dried sludge obtained by drying a wet sewage sludge, plastics, and, if necessary, quicklime are heated while being kneaded, and then formed into a predetermined shape.
【0004】[0004]
【発明が解決しようとする課題】上記の従来技術では、
下水処理場と全く関係のない廃棄物であるプラスチック
スを添加することが不可欠であり、処理場所や管理省庁
が異なる廃棄物を混合処理することは、きわめて現実的
でない。さらに、熱量調節のためには、大量のプラスチ
ックスを混合する必要があり、製造場所に大規模な廃プ
ラスチックスの貯蔵設備が必要となる。また、プラスチ
ックスの混入物を成型する場合、成型部の温度をプラス
チックスの溶融温度以上にする必要があり、成型方法と
混入させるプラスチックスの種類に相関した制約条件が
生じる。また、畜産廃棄物等は乾燥前からアンモニアを
含んでおり、他の有機性廃棄物も成型工程や乾燥工程で
アンモニア含有排ガスを発生させるので、これらのガス
の処理が必要になる。In the above prior art,
It is imperative to add plastics, a waste that has nothing to do with a sewage treatment plant, and it is not very practical for treatment sites and administrative ministries to mix and treat different wastes. In addition, a large amount of plastics must be mixed for heat control, and a large-scale waste plastics storage facility is required at the manufacturing site. Further, when molding a contaminant of plastics, it is necessary to set the temperature of the molding portion to be equal to or higher than the melting temperature of the plastics. In addition, livestock wastes and the like contain ammonia before drying, and other organic wastes generate ammonia-containing exhaust gas in the molding step and the drying step, so that it is necessary to treat these gases.
【0005】上記の点を解決するために、本出願人は既
に、特開平10−305272号公報に示すように、脱
水された湿潤有機性廃棄物を乾燥機でガスタービンから
の排ガスと接触させ乾燥させて乾燥有機性廃棄物とし、
乾燥機からの臭気排ガスを粉末活性コークス、粉末活性
炭、粉末褐炭等の粉末炭素系吸着剤で被覆されたバグフ
ィルタ式脱臭装置に導入して脱臭処理し、このバグフィ
ルタ式脱臭装置からの使用済粉末炭素系吸着剤を前記乾
燥機の出口近傍の乾燥有機性廃棄物と混合して成型する
湿潤有機性廃棄物の処理方法及び装置を開発している。In order to solve the above problems, the present applicant has already made the dewatered wet organic waste contact the exhaust gas from the gas turbine with a dryer as shown in Japanese Patent Application Laid-Open No. 10-305272. Dried to dry organic waste,
The odorous exhaust gas from the dryer is introduced into a bag filter type deodorizer coated with a powdered carbon-based adsorbent such as powdered activated coke, powdered activated carbon, and powdered lignite, and deodorized. We have developed a method and an apparatus for treating wet organic waste, in which a powdered carbon-based adsorbent is mixed with dry organic waste near the outlet of the dryer and molded.
【0006】本発明は上記特開平10−305272号
公報記載の発明をさらに一歩進めて改良したもので、本
発明の目的は、メタン発酵工程、ガスタービン発電工
程、脱水工程、乾燥工程、生物処理工程、固液分離工
程、接触乾燥工程等を組み合わせることにより、湿潤有
機性廃棄物を臭気対策、廃水対策を講じながら、効率よ
く処理し乾燥物を製造することができる方法及び装置を
提供することにある。The present invention is a further improvement of the invention described in JP-A-10-305272, and an object of the present invention is to provide a methane fermentation step, a gas turbine power generation step, a dehydration step, a drying step, and a biological treatment. Provided is a method and an apparatus capable of efficiently treating wet organic waste and producing a dried product while taking measures against odor and wastewater by combining a process, a solid-liquid separation process, a contact drying process and the like. It is in.
【0007】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明の湿潤有機性廃棄物から乾燥物を製造する
方法は、つぎの(a)〜(g)の工程、すなわち、
(a) 湿潤有機性廃棄物をメタン発酵させてメタンガ
スを発生させるとともにメタン発酵処理廃棄物を得るメ
タン発酵工程、(b) 発生したメタンガスを燃焼させ
燃焼排ガスをガスタービン発電機に導入して発電する発
電工程、(c) メタン発酵処理廃棄物を脱水して脱水
廃液と脱水廃棄物とに分離する脱水工程、(d) 脱水
廃棄物とガスタービン発電機からの排ガスとを接触させ
て脱水廃棄物を乾燥させる乾燥工程、(e) 脱水工程
からの脱水廃液を好気性微生物処理する生物処理工程、
(f) 生物処理工程からの処理液を導入して処理水と
余剰汚泥とに分離する固液分離工程、(g) 固液分離
工程からの余剰汚泥と、乾燥工程からの排ガスとを接触
させて余剰汚泥を乾燥させるとともに、排ガス中の臭気
成分を吸着除去する接触乾燥工程、を包含するように構
成される。In order to achieve the above object, a method for producing a dried product from wet organic waste according to the present invention comprises the following steps (a) to (g):
(A) methane fermentation of wet organic waste to generate methane gas while producing methane fermentation waste, and (b) burning the generated methane gas and introducing the combustion exhaust gas into a gas turbine generator to generate power (C) dehydration of methane fermentation treatment waste to separate it into dehydration waste liquid and dehydration waste, (d) dehydration waste by contacting the dehydration waste with exhaust gas from a gas turbine generator A drying step of drying the product, (e) a biological treatment step of treating the dewatered waste liquid from the dehydration step with an aerobic microorganism,
(F) a solid-liquid separation step of introducing a treatment liquid from the biological treatment step and separating it into treated water and excess sludge; (g) contacting excess sludge from the solid-liquid separation step with exhaust gas from the drying step And a contact drying step of adsorbing and removing odor components in the exhaust gas.
【0008】上記の方法において、接触乾燥工程からの
乾燥余剰汚泥を、乾燥工程からの乾燥物と混合し成形す
る成形工程を設けることが好ましい。また、固液分離工
程からの余剰汚泥を脱水して、分離水を固液分離工程か
らの処理水に戻し、分離汚泥を接触乾燥工程に導入する
ことが好ましい。また、接触乾燥工程からの排ガスをメ
タン発酵工程の加熱に用いた後、排出することが好まし
い。さらに、メタン発酵工程の加熱に用いた排ガスから
凝縮水を分離し、この凝縮水を固液分離工程からの処理
水に混合し放流することが好ましい。これらの方法にお
いて、生物処理工程が活性汚泥処理工程であることが好
ましい。[0008] In the above method, it is preferable to provide a forming step of mixing and forming excess sludge from the contact drying step with the dried product from the drying step. Further, it is preferable that excess sludge from the solid-liquid separation step is dewatered, the separated water is returned to the treated water from the solid-liquid separation step, and the separated sludge is introduced into the contact drying step. Further, it is preferable that the exhaust gas from the contact drying step is discharged after being used for heating in the methane fermentation step. Furthermore, it is preferable to separate condensed water from the exhaust gas used for heating in the methane fermentation step, mix this condensed water with the treated water from the solid-liquid separation step, and discharge it. In these methods, the biological treatment step is preferably an activated sludge treatment step.
【0009】本発明の湿潤有機性廃棄物から乾燥物を製
造する装置は、湿潤有機性廃棄物をメタン発酵させてメ
タンガスを発生させるとともにメタン発酵処理廃棄物を
得るメタン発酵槽と、発生したメタンガスを燃焼させ燃
焼排ガスを導入して発電するガスタービン発電機と、メ
タン発酵処理廃棄物を脱水して脱水廃液と脱水廃棄物と
に分離する発酵処理廃棄物脱水機と、脱水廃棄物とガス
タービン発電機からの排ガスとを接触させて脱水廃棄物
を乾燥させる乾燥機と、脱水工程からの脱水廃液を好気
性微生物処理する生物処理装置と、生物処理装置からの
処理液を導入して処理水と余剰汚泥とに分離する固液分
離装置と、固液分離装置からの余剰汚泥と、乾燥機から
の排ガスとを接触させて余剰汚泥を乾燥させるととも
に、排ガス中の臭気成分を吸着除去する接触・乾燥塔
と、を備えたことを特徴としている。An apparatus for producing a dried product from wet organic waste according to the present invention comprises a methane fermentation tank for producing methane gas while producing methane gas by subjecting wet organic waste to methane fermentation; Gas turbine generator that burns methane and introduces flue gas to generate electricity, fermentation waste dehydrator that dehydrates methane fermentation waste and separates it into dewatered waste liquid and dewatered waste, dewatered waste and gas turbine A dryer for drying dewatered waste by contacting exhaust gas from a generator, a biological treatment device for aerobic microorganism treatment of dewatered waste liquid from the dehydration process, and a treated water by introducing a treatment liquid from the biological treatment device. Solid-liquid separation device that separates the excess sludge into waste and excess sludge from the solid-liquid separation device and exhaust gas from the dryer to dry the excess sludge and the odor in the exhaust gas. Minute is characterized by comprising a contact-drying tower for adsorbing and removing.
【0010】上記の装置において、接触・乾燥塔からの
乾燥余剰汚泥を、乾燥機からの乾燥物と混合し成形する
成形機を備えるように構成することが好ましい。また、
固液分離装置と接触・乾燥塔との間に、固液分離装置か
らの余剰汚泥を脱水するための余剰汚泥脱水機を備える
ように構成することが好ましい。さらに、メタン発酵槽
と排ガス排出塔との間に、排ガス中の凝縮水を分離する
ための凝縮水セパレータを備えるように構成することが
好ましい。これらの装置において、生物処理装置が活性
汚泥処理装置であるように構成することが好ましい。[0010] In the above apparatus, it is preferable to provide a molding machine for mixing the excess sludge from the contact / drying tower with the dried matter from the dryer and molding the sludge. Also,
It is preferable that a surplus sludge dewatering device for dehydrating surplus sludge from the solid-liquid separation device is provided between the solid-liquid separation device and the contact / drying tower. Further, it is preferable that a condensed water separator for separating condensed water in the exhaust gas be provided between the methane fermentation tank and the exhaust gas discharge tower. In these apparatuses, it is preferable to configure the biological treatment apparatus to be an activated sludge treatment apparatus.
【0011】[0011]
【発明の実施の形態】以下、本発明の実施の形態につい
て説明するが、本発明は下記の実施の形態に何ら限定さ
れるものではなく、適宜変更して実施することができる
ものである。図1は本発明の実施の第1形態による湿潤
有機性廃棄物から乾燥物を製造する装置を示している。
10はメタン発酵槽(メタン発酵装置)で、家畜ふん
尿、下水汚泥、食品粕等の湿潤有機性廃棄物を導入し、
メタン発酵させてメタンガスを発生させるとともに、メ
タン発酵処理廃棄物を得るためのものである。メタン発
酵は、嫌気性条件下で20〜60℃の範囲で行われる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention is not limited to the following embodiments and can be implemented with appropriate modifications. FIG. 1 shows an apparatus for producing a dried product from wet organic waste according to a first embodiment of the present invention.
Reference numeral 10 denotes a methane fermentation tank (methane fermentation apparatus) for introducing wet organic waste such as livestock manure, sewage sludge, and food lees,
It is for producing methane gas by methane fermentation and obtaining methane fermentation waste. Methane fermentation is carried out under anaerobic conditions at a temperature in the range of 20-60 ° C.
【0012】発生したメタンガスは燃焼器(図示略)に
導入されて燃焼し、燃焼排ガスはガスタービン発電機1
2に導入され発電する。発電した電力は系内で利用され
る。メタン発酵槽10からのメタン発酵処理廃棄物は脱
水機14に導入されて脱水され、脱水廃液と脱水廃棄物
とに分離される。脱水廃棄物とガスタービン発電機12
からの排ガスの全量とが乾燥機16、例えば気流乾燥機
に導入されて直接接触し、脱水廃棄物を乾燥させる。脱
水機14からの脱水廃液は、好気性微生物処理するため
の生物処理装置18、例えば活性汚泥処理装置に導入さ
れ、曝気空気が供給されて生物処理される。The generated methane gas is introduced into a combustor (not shown) and burns, and the combustion exhaust gas is discharged from a gas turbine generator 1.
2 to generate electricity. The generated power is used in the system. The methane fermentation treatment waste from the methane fermentation tank 10 is introduced into the dehydrator 14 and dehydrated, and is separated into a dehydration waste liquid and a dehydration waste. Dewatering waste and gas turbine generator 12
The entire amount of the exhaust gas from is introduced into a dryer 16, for example, a flash dryer, and comes into direct contact therewith to dry the dewatered waste. The dewatered waste liquid from the dehydrator 14 is introduced into a biological treatment device 18 for treating aerobic microorganisms, for example, an activated sludge treatment device, and is supplied with aerated air for biological treatment.
【0013】生物処理装置18からの処理液は固液分離
装置20、例えば沈殿槽に導入されて処理水と余剰汚泥
とに分離される。この余剰汚泥は脱水機22に導入さ
れ、さらに脱水されて、分離水と分離余剰汚泥とに分離
される。この分離余剰汚泥と、乾燥機16からの排ガス
とを接触・乾燥塔24に導入し直接接触させて分離余剰
汚泥を乾燥させるとともに、排ガス中のアンモニア等の
臭気成分を余剰汚泥に吸着させて除去する。The treatment liquid from the biological treatment device 18 is introduced into a solid-liquid separation device 20, for example, a sedimentation tank, and is separated into treated water and excess sludge. This surplus sludge is introduced into the dehydrator 22 and is further dewatered to be separated into separated water and separated surplus sludge. The separated excess sludge and the exhaust gas from the dryer 16 are introduced into the contact / drying tower 24 and are brought into direct contact therewith to dry the separated excess sludge, and the odor components such as ammonia in the exhaust gas are adsorbed to the excess sludge and removed. I do.
【0014】接触・乾燥塔24からの乾燥余剰汚泥は、
乾燥機16からの乾燥物とともに成形機26に供給され
て所定の形状に成形される。成形物はメタン発酵処理後
に乾燥物とされたものであるので、微生物的に安定して
おり、固形肥料等として用いられる。接触・乾燥塔24
からの排ガスは、メタン発酵槽10の加熱に用いられた
後、凝縮水セパレータ28で凝縮水が分離され、排ガス
排出塔30から排出される。凝縮水セパレータ28から
の凝縮水、脱水機22からの分離水は、固液分離装置2
0からの生物処理された処理水に混合稀釈されて、最終
処理水として放流される。固液分離装置20からの排出
汚泥の一部を余剰汚泥として脱水機22に導入し、残汚
泥を生物処理装置18に戻す場合もある。The excess sludge from the contact / drying tower 24 is
The dried product from the dryer 16 is supplied to the molding machine 26 to be formed into a predetermined shape. Since the molded product is a dried product after the methane fermentation treatment, it is microbially stable and used as a solid fertilizer or the like. Contact / drying tower 24
After being used for heating the methane fermenter 10, the condensed water is separated by the condensed water separator 28 and discharged from the exhaust gas discharge tower 30. The condensed water from the condensed water separator 28 and the separated water from the dehydrator 22 are supplied to the solid-liquid separation device 2.
It is mixed and diluted with the biologically treated water from 0 and discharged as the final treated water. A part of the sludge discharged from the solid-liquid separation device 20 may be introduced into the dehydrator 22 as surplus sludge, and the residual sludge may be returned to the biological treatment device 18.
【0015】[0015]
【実施例】以下に実施例を示し、本発明の特徴とすると
ころをより一層明確にする。 実施例1 図2は物質収支(マテリアルバランス)及び各部の運転
条件の一例を示すフローシートである。図2では、湿潤
有機性汚泥の一例として温度20℃、VTS(揮発性有
機固形分)9%の家蓄ふん尿100kg/hrを処理した場
合を示している。なお、乾燥機16として気流乾燥装置
を用い、成形機26としてディスクダイ式成形機を用
い、生物処理装置18として活性汚泥処理装置を用い、
固液分離装置20として沈殿槽を用い、脱水機14とし
てスクリュープレス式脱水機を用い、脱水機22として
スクリュープレス式脱水機を用い、接触・乾燥塔24と
して、含水率80%の分離余剰汚泥を上部からスプレー
し、下部から排ガスを導入する対向流式の接触塔を用い
た。この結果、水分20%の成形物5.0kg/hrが得ら
れ、BOD200mg/l の最終処理水77.0kg/hrが
放流された。EXAMPLES Examples are shown below to further clarify the features of the present invention. Example 1 FIG. 2 is a flow sheet showing an example of a material balance (material balance) and operating conditions of each part. FIG. 2 shows a case in which 100 kg / hr of household waste stored at a temperature of 20 ° C. and a VTS (volatile organic solid content) of 9% is treated as an example of wet organic sludge. In addition, using a flash dryer as the dryer 16, using a disk die-type molding machine as the molding machine 26, using an activated sludge treatment apparatus as the biological treatment apparatus 18,
A sedimentation tank is used as the solid-liquid separator 20, a screw press dehydrator is used as the dehydrator 14, a screw press dehydrator is used as the dehydrator 22, and a separation / excess sludge having a water content of 80% is used as the contact / drying tower 24. Was sprayed from above and an exhaust gas was introduced from below using a counter-flow type contact tower. As a result, 5.0 kg / hr of a molded product having a water content of 20% was obtained, and 77.0 kg / hr of final treated water having a BOD of 200 mg / l was discharged.
【0016】[0016]
【発明の効果】本発明は上記のように構成されているの
で、つぎのような効果を奏する。 (1) 湿潤有機性廃棄物をメタン発酵させて得たメタ
ンガスを燃料として、すなわち、廃棄物の一部を燃料と
して自らの残固形物を乾燥させるため、新たな燃料投入
の必要がほとんどなくなる。また、発生したメタンガス
をガスタービン発電機及び廃熱に変換するため、小規模
の装置にも対応させることができる。 (2) 廃水処理を行うことができるので、畜産し尿等
の高水分有機性廃棄物にも対応させることができる。 (3) メタン発酵により発生したメタンガスを燃料と
するガスタービン発電機を有するため、電力の供給源が
ない場所でも設置することができる。 (4) 湿潤有機性廃棄物のメタン発酵後に乾燥物とす
るため、微生物的に安定な乾燥物又は成形物を得ること
ができ、固形肥料として有効に使用することができる。As described above, the present invention has the following effects. (1) Since methane gas obtained by methane fermentation of wet organic waste is used as a fuel, that is, a part of the waste is used as a fuel to dry its own remaining solid matter, there is almost no need to input new fuel. Further, since the generated methane gas is converted into a gas turbine generator and waste heat, it can be adapted to a small-scale device. (2) Since wastewater treatment can be performed, it is possible to cope with high-moisture organic waste such as livestock and human waste. (3) Since it has a gas turbine generator using methane gas generated by methane fermentation as a fuel, it can be installed even in a place where there is no power supply source. (4) Since the wet organic waste is dried after methane fermentation, a dried or molded product that is microbially stable can be obtained, and can be effectively used as a solid fertilizer.
【図1】本発明の実施の第1形態による湿潤有機性廃棄
物から乾燥物を製造する装置を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing an apparatus for producing a dried product from wet organic waste according to a first embodiment of the present invention.
【図2】物質収支及び各部の運転条件を示す本発明の装
置のフローシートである。FIG. 2 is a flow sheet of the apparatus of the present invention showing a material balance and operating conditions of each part.
10 メタン発酵槽 12 ガスタービン発電機 14 脱水機 16 乾燥機 18 生物処理装置 20 固液分離装置 22 脱水機 24 接触・乾燥塔 26 成形機 28 凝縮水セパレータ 30 排ガス排出塔 DESCRIPTION OF SYMBOLS 10 Methane fermentation tank 12 Gas turbine generator 14 Dehydrator 16 Dryer 18 Biological treatment apparatus 20 Solid-liquid separation apparatus 22 Dehydrator 24 Contact / drying tower 26 Molding machine 28 Condensed water separator 30 Exhaust gas discharge tower
───────────────────────────────────────────────────── フロントページの続き (72)発明者 笹倉 正晴 兵庫県明石市川崎町1番1号 川崎重工業 株式会社 明石工場内 (72)発明者 正木 博夫 兵庫県明石市川崎町3番1号 川重テクノ サービス株式会社内 Fターム(参考) 4D004 AA02 AA04 CA13 CA14 CA18 CA42 CA47 CA48 CB04 CB31 CB50 4D059 AA01 AA05 AA07 BA01 BA12 BD01 BE00 BK08 CA10 CA16 CA21 CA22 CA28 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaharu Sasakura 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside Akashi Plant (72) Inventor Hiroo Masaki 3-1, Kawasaki-cho, Akashi-shi, Hyogo F term in Service Co., Ltd. (reference) 4D004 AA02 AA04 CA13 CA14 CA18 CA42 CA47 CA48 CB04 CB31 CB50 4D059 AA01 AA05 AA07 BA01 BA12 BD01 BE00 BK08 CA10 CA16 CA21 CA22 CA28
Claims (11)
ち、(a) 湿潤有機性廃棄物をメタン発酵させてメタ
ンガスを発生させるとともにメタン発酵処理廃棄物を得
るメタン発酵工程、(b) 発生したメタンガスを燃焼
させ燃焼排ガスをガスタービン発電機に導入して発電す
る発電工程、(c) メタン発酵処理廃棄物を脱水して
脱水廃液と脱水廃棄物とに分離する脱水工程、(d)
脱水廃棄物とガスタービン発電機からの排ガスとを接触
させて脱水廃棄物を乾燥させる乾燥工程、(e) 脱水
工程からの脱水廃液を好気性微生物処理する生物処理工
程、(f) 生物処理工程からの処理液を導入して処理
水と余剰汚泥とに分離する固液分離工程、(g) 固液
分離工程からの余剰汚泥と、乾燥工程からの排ガスとを
接触させて余剰汚泥を乾燥させるとともに、排ガス中の
臭気成分を吸着除去する接触乾燥工程、を包含すること
を特徴とする湿潤有機性廃棄物から乾燥物を製造する方
法。1. The following steps (a) to (g): (a) a methane fermentation step of methane fermenting wet organic waste to generate methane gas and obtaining methane fermentation treated waste; (b) (C) a power generation step of burning generated methane gas and introducing combustion exhaust gas into a gas turbine generator to generate power; (c) a dehydration step of dehydrating methane fermentation treatment waste and separating it into a dehydration waste liquid and a dehydration waste; )
A drying step of contacting the dewatered waste with an exhaust gas from a gas turbine generator to dry the dewatered waste; (e) a biological treatment step of treating the dewatered waste liquid from the dehydration step with an aerobic microorganism; and (f) a biological treatment step. A solid-liquid separation step of introducing treatment liquid from the process into water and excess sludge, and (g) contacting excess sludge from the solid-liquid separation step with exhaust gas from the drying step to dry the excess sludge And a contact drying step of adsorbing and removing odor components in the exhaust gas, and a method for producing a dried product from wet organic waste.
燥工程からの乾燥物と混合し成形する成形工程を設ける
請求項1記載の湿潤有機性廃棄物から乾燥物を製造する
方法。2. The method for producing a dried product from wet organic waste according to claim 1, further comprising a forming step of mixing and forming the excess dried sludge from the contact drying process with the dried product from the drying process.
て、分離水を固液分離工程からの処理水に戻し、分離汚
泥を接触乾燥工程に導入する請求項1又は2記載の湿潤
有機性廃棄物から乾燥物を製造する方法。3. The wet organic substance according to claim 1, wherein excess sludge from the solid-liquid separation step is dewatered, separated water is returned to the treated water from the solid-liquid separation step, and the separated sludge is introduced into the contact drying step. A method for producing dry matter from municipal waste.
工程の加熱に用いた後、排出する請求項1、2又は3記
載の湿潤有機性廃棄物から乾燥物を製造する方法。4. The method for producing a dried product from wet organic waste according to claim 1, wherein the exhaust gas from the contact drying process is discharged after being used for heating in the methane fermentation process.
ら凝縮水を分離し、この凝縮水を固液分離工程からの処
理水に混合し放流する請求項1〜4のいずれかに記載の
湿潤有機性廃棄物から乾燥物を製造する方法。5. The wet according to claim 1, wherein condensed water is separated from exhaust gas used for heating in the methane fermentation step, and the condensed water is mixed with treated water from the solid-liquid separation step and discharged. A method for producing dry matter from organic waste.
請求項1〜5のいずれかに記載の湿潤有機性廃棄物から
乾燥物を製造する方法。6. The method for producing a dried product from wet organic waste according to claim 1, wherein the biological treatment step is an activated sludge treatment step.
タンガスを発生させるとともにメタン発酵処理廃棄物を
得るメタン発酵槽と、 発生したメタンガスを燃焼させ燃焼排ガスを導入して発
電するガスタービン発電機と、 メタン発酵処理廃棄物を脱水して脱水廃液と脱水廃棄物
とに分離する発酵処理廃棄物脱水機と、 脱水廃棄物とガスタービン発電機からの排ガスとを接触
させて脱水廃棄物を乾燥させる乾燥機と、 脱水工程からの脱水廃液を好気性微生物処理する生物処
理装置と、 生物処理装置からの処理液を導入して処理水と余剰汚泥
とに分離する固液分離装置と、 固液分離装置からの余剰汚泥と、乾燥機からの排ガスと
を接触させて余剰汚泥を乾燥させるとともに、排ガス中
の臭気成分を吸着除去する接触・乾燥塔と、を備えたこ
とを特徴とする湿潤有機性廃棄物から乾燥物を製造する
装置。7. A methane fermenter for producing methane gas by subjecting humid organic waste to methane fermentation to produce methane fermentation waste, and a gas turbine generator for generating electricity by burning generated methane gas and introducing combustion exhaust gas. Fermentation waste dehydrator that dewaters methane fermentation waste and separates it into dewatered waste liquid and dewatered waste; and contacts dewatered waste with exhaust gas from gas turbine generator to dry dehydrated waste. A drier for performing the aerobic microbial treatment of the dewatered waste liquid from the dehydration process; a solid-liquid separation device for introducing the treatment liquid from the biological treatment device and separating it into treated water and excess sludge; A contact / drying tower for contacting the excess sludge from the separation device with the exhaust gas from the dryer to dry the excess sludge and adsorbing and removing odor components in the exhaust gas. A device for producing dry matter from wet organic waste.
燥機からの乾燥物と混合し成形する成形機を備えた請求
項7記載の湿潤有機性廃棄物から乾燥物を製造する装
置。8. The apparatus for producing a dried product from wet organic waste according to claim 7, further comprising a molding machine for mixing and forming the excess dried sludge from the contact / drying tower with the dried product from the dryer.
固液分離装置からの余剰汚泥を脱水するための余剰汚泥
脱水機を備えた請求項7又は8記載の湿潤有機性廃棄物
から乾燥物を製造する装置。9. Between the solid-liquid separation device and the contact / drying tower,
The apparatus for producing a dried product from wet organic waste according to claim 7 or 8, further comprising an excess sludge dewatering device for dehydrating excess sludge from the solid-liquid separation device.
に、排ガス中の凝縮水を分離するための凝縮水セパレー
タを備えた請求項7、8又は9記載の湿潤有機性廃棄物
から乾燥物を製造する装置。10. The wet organic waste to dried product according to claim 7, 8 or 9, further comprising a condensed water separator for separating condensed water in the exhaust gas between the methane fermentation tank and the exhaust gas discharge tower. Equipment for manufacturing.
る請求項7〜10のいずれかに記載の湿潤有機性廃棄物
から乾燥物を製造する装置。11. The apparatus according to claim 7, wherein the biological treatment apparatus is an activated sludge treatment apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08275599A JP3406535B2 (en) | 1999-03-26 | 1999-03-26 | Method and apparatus for producing dry matter from wet organic waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08275599A JP3406535B2 (en) | 1999-03-26 | 1999-03-26 | Method and apparatus for producing dry matter from wet organic waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000282071A true JP2000282071A (en) | 2000-10-10 |
| JP3406535B2 JP3406535B2 (en) | 2003-05-12 |
Family
ID=13783266
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08275599A Expired - Fee Related JP3406535B2 (en) | 1999-03-26 | 1999-03-26 | Method and apparatus for producing dry matter from wet organic waste |
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| Country | Link |
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|---|---|---|---|---|
| JP2002273493A (en) * | 2001-03-23 | 2002-09-24 | Mitsubishi Heavy Ind Ltd | Organic solid processing system |
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| JP2005074328A (en) * | 2003-09-01 | 2005-03-24 | Kurimoto Ltd | Method for treating organic sludge |
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| JP2002273493A (en) * | 2001-03-23 | 2002-09-24 | Mitsubishi Heavy Ind Ltd | Organic solid processing system |
| JP2002361200A (en) * | 2001-06-07 | 2002-12-17 | Ishikawajima Harima Heavy Ind Co Ltd | Deodorization treatment system |
| JP2003073679A (en) * | 2001-08-31 | 2003-03-12 | Mitsubishi Heavy Ind Ltd | Dehydrator for gas hydrate slurry |
| JP2003074373A (en) * | 2001-09-03 | 2003-03-12 | Tokyo Gas Co Ltd | Turbine equipment |
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| JP2008253963A (en) * | 2007-04-09 | 2008-10-23 | Kawasaki Plant Systems Ltd | Waste and sewage treatment method and equipment |
| JP2012187534A (en) * | 2011-03-11 | 2012-10-04 | National Institute Of Advanced Industrial Science & Technology | Method for treating organic matter waste liquid |
| CN102703156A (en) * | 2012-06-03 | 2012-10-03 | 黄云生 | Process for preparing biofuel from biological waste |
| CN103471374A (en) * | 2013-09-29 | 2013-12-25 | 湖南科技大学 | Solar auxiliary heat-pump drying system |
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| JP2015131263A (en) * | 2014-01-10 | 2015-07-23 | 月島機械株式会社 | Organic waste processor, dryer for use in organic waste processor, and processing method of organic waste |
| CN105433852A (en) * | 2015-12-20 | 2016-03-30 | 上海伊洁环保设备工程有限公司 | Method for removing odor in liquid manure and deodorizer and sanitary appliance implementing method |
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