JP2001070744A - Malodor treatment method of composting apparatus and system therefor - Google Patents
Malodor treatment method of composting apparatus and system thereforInfo
- Publication number
- JP2001070744A JP2001070744A JP24839499A JP24839499A JP2001070744A JP 2001070744 A JP2001070744 A JP 2001070744A JP 24839499 A JP24839499 A JP 24839499A JP 24839499 A JP24839499 A JP 24839499A JP 2001070744 A JP2001070744 A JP 2001070744A
- Authority
- JP
- Japan
- Prior art keywords
- odor
- composting
- sludge
- liquid
- discharged
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
- Fertilizers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、し尿や浄化槽汚泥
等の有機性廃水を処理する際に発生する余剰汚泥及び厨
芥等の有機性廃棄物を、発酵乾燥することにより堆肥化
する汚泥処理システムに係り、特に堆肥化装置から排出
される臭気の処理方法とそのシステムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge treatment system for composting fertilized organic waste such as kitchen waste and surplus sludge generated when treating organic wastewater such as human waste and septic tank sludge. More particularly, the present invention relates to a method and a system for treating odor discharged from a composting device.
【０００２】[0002]
【従来技術】従来より、し尿および浄化槽汚泥等の有機
性廃水処理において、し渣除去された有機性廃水を廃水
処理する際に発生する余剰汚泥を、脱水、混合し、発酵
により堆肥化する方法は公知であり、該発酵により発生
する臭気は水洗浄塔で除塵され、水洗浄塔の後工程に設
置された脱臭装置にて薬品洗浄、薬品酸化、活性炭吸着
等の脱臭処理を施された後外部に排出される。2. Description of the Related Art Conventionally, in the treatment of organic wastewater such as human waste and septic tank sludge, a method of dehydrating, mixing, and composting by fermentation the excess sludge generated when the organic wastewater from which residue is removed is treated as wastewater. Is known, and the odor generated by the fermentation is removed by a water washing tower, and after being subjected to deodorizing treatment such as chemical washing, chemical oxidation, and activated carbon adsorption by a deodorizing device installed in a subsequent process of the water washing tower. It is discharged outside.
【０００３】かかる臭気処理プロセスを図５に基づいて
説明するに、先ず厨芥等と混合した脱水汚泥は発酵槽１
にて散気されながら好気化条件のもとで堆肥化され、該
発酵槽により発生した水分や粉塵を含む前記散気分と通
気分とからなる臭気は、水洗浄塔２により除塵及び冷却
された後、中濃度臭気として前記脱臭装置(不図示)に送
り込まれる。[0005] The odor treatment process will be described with reference to FIG. 5.
The odor composed of the diffused and aerated components including water and dust generated by the fermenter was removed and cooled by the water washing tower 2 while being composted under aerobic conditions while being diffused. Thereafter, it is sent to the deodorizing device (not shown) as a medium concentration odor.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら堆肥化装
置から排出される高温多湿の気体は、高濃度のアンモニ
アや硫化メチル、メチルカプタン等の硫黄化合物が含ま
れた高濃度の臭気であり、該臭気を直接薬品、活性炭等
による処理を行った際には、膨大な費用が必要とされ
る。この為前記従来技術においては、水洗浄塔で臭気を
洗浄することにより臭気濃度の低減を図っているが、水
洗浄では臭気成分の吸収効率が悪いため、後段の脱臭装
置にかかる負荷は殆ど減少せず、薬品、活性炭等の脱臭
におけるコストが多量に要されるという欠点は殆ど解消
されていない。また、好気性発酵に必要な散気量と、該
散気量のおよそ１０倍の通気量により多量の臭気を処理
せねばならず、一層脱臭装置にかかる負荷が増すという
課題を有していた。However, the high-temperature and high-humidity gas discharged from the composting apparatus is a high-concentration odor containing high-concentration ammonia and sulfur compounds such as methyl sulfide and methylcaptan. When the treatment with a chemical, activated carbon or the like is performed directly, enormous costs are required. For this reason, in the above-mentioned prior art, the odor concentration is reduced by washing the odor with a water washing tower. However, the load on the deodorizer in the subsequent stage is almost reduced because the efficiency of absorbing the odor component is low in the water washing. However, the disadvantage that a large amount of cost is required for deodorizing chemicals, activated carbon, and the like is hardly solved. In addition, a large amount of odor has to be treated by the amount of air diffused necessary for aerobic fermentation and the amount of aeration that is about 10 times the amount of air diffused, and there is a problem that the load on the deodorizing device is further increased. .
【０００５】本発明の目的はかかる課題に鑑み、堆肥化
装置より排出される臭気を廃水処理装置で循環している
活性汚泥を利用し、液接触を施すことにより臭気濃度を
低減し得る堆肥化装置の臭気処理方法とそのシステムの
提供にある。本発明の他の目的は、堆肥化装置より排出
される臭気を発酵槽に返送し、循環させることにより最
終的に脱臭装置で処理する臭気量を減少させることを目
的とする。SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to reduce the odor concentration by using an activated sludge circulating in a wastewater treatment apparatus to reduce the odor concentration by using activated sludge circulated in a wastewater treatment apparatus. It is an object of the present invention to provide an apparatus for treating odor and a system therefor. Another object of the present invention is to reduce the amount of odor finally treated by the deodorizing device by returning the odor discharged from the composting device to the fermenter and circulating it.
【０００６】[0006]
【課題を解決するための手段】本発明は、脱水汚泥、厨
芥等の有機性廃棄物に散気させながら発酵させる発酵槽
内に、少なくとも飽和湿度以下の大気を通気させ、前記
発酵槽内で発生した水分等とともに前記散気分と通気分
とからなる臭気を外部排出させる堆肥化装置における臭
気処理方法において、前記堆肥化装置より排出された粉
塵や水分を含んだ臭気と、廃水処理装置より得られる活
性汚泥の少なくとも一部を含む液とを液接触させて臭気
処理を行うことを特徴とする。SUMMARY OF THE INVENTION The present invention is directed to a fermenter for fermenting organic waste such as dewatered sludge and kitchen garbage while diffusing it into air. In the odor treatment method in a composting device that externally discharges the odor composed of the diffused air and the aerated component together with the generated moisture and the like, the odor containing dust and water discharged from the composting device and the wastewater treatment device obtain the odor. The odor treatment is performed by bringing a liquid containing at least a part of the activated sludge into contact with the liquid.
【０００７】かかる発明によれば、従来技術の水洗浄塔
に代り液接触塔を設け、廃水処理装置内で循環している
活性汚泥（生物汚泥）を用いることにより、臭気中の粉
塵が除塵されるとともに、臭気が生物脱臭されることに
より臭気濃度が低下し、後段の脱臭装置の負荷を低減す
ることが可能となる。According to the invention, a liquid contact tower is provided in place of the conventional water washing tower, and activated sludge (biological sludge) circulating in the wastewater treatment apparatus is used to remove dust in the odor. At the same time, the odor is biologically deodorized, whereby the odor concentration is reduced, and the load on the subsequent deodorizing device can be reduced.
【０００８】そして好ましくは請求項２記載のように、
前記堆肥化装置より排出された粉塵や水分を含んだ臭気
を液接触により除塵した後前記水分を凝縮して、飽和湿
度以下にした後、該飽和湿度以下の臭気の少なくとも一
部を前記発酵槽の通気側に返送し、循環させるとよい。[0008] Preferably, as described in claim 2,
After removing the odor containing dust and water discharged from the composting device by liquid contact, the water is condensed and reduced to a saturation humidity or less, and at least a part of the odor less than the saturation humidity is reduced to the fermenter. It is good to return to the ventilation side of and circulate.
【０００９】かかる発明によれば、前記堆肥化装置より
排出した臭気を液接触により洗浄し、その後凝縮して湿
度を大気条件と同程度にすることで、該臭気を堆肥化装
置に返送し散気・通気に循環利用でき、液接触槽の後段
側に用いる臭気排出量を低減することが出来、活性炭槽
その他から形成される脱臭装置の負荷低減が図れる。According to this invention, the odor discharged from the composting device is washed by liquid contact, and then condensed to make the humidity approximately equal to the atmospheric condition, whereby the odor is returned to the composting device and dispersed. It can be circulated and used for air and aeration, reducing the amount of odor used in the latter stage of the liquid contact tank, and reducing the load on a deodorizing device formed from an activated carbon tank or the like.
【００１０】請求項３記載の発明は、前記請求項１記載
の発明を効果的に実施するためのシステムに関する発明
で、脱水汚泥、厨芥等の有機性廃棄物をメタン発酵し
て、残留したメタン発酵汚泥に散気させながら発酵させ
る発酵槽内に、少なくとも飽和湿度以下の大気を通気さ
せ、前記発酵槽内で発生した水分等とともに前記散気分
と通気分とからなる臭気を外部排出させる堆肥化装置に
おける臭気処理システムにおいて、前記堆肥化装置の臭
気排出側に、堆肥化装置の前工程である廃水処理装置で
循環している活性汚泥の少なくとも一部が導かれる液接
触工程を設け、該工程内で前記堆肥化装置より排出され
た粉塵や水分を含む臭気と活性汚泥とを接触させること
を特徴とする。A third aspect of the present invention relates to a system for effectively implementing the first aspect of the present invention, wherein methane fermentation is performed on organic waste such as dehydrated sludge and kitchen garbage to obtain residual methane. A composting system in which the fermentation tank for fermenting while diffusing the fermented sludge is ventilated with an atmosphere of at least a saturation humidity, and externally discharges the odor composed of the diffused and aerated components together with the moisture and the like generated in the fermenter. In the odor treatment system of the device, a liquid contacting step is provided on the odor discharge side of the composting device, in which at least a part of the activated sludge circulated in the wastewater treatment device is a pre-process of the composting device, In this method, the activated sludge is brought into contact with an odor containing dust and water discharged from the composting device.
【００１１】請求項４記載の発明は前記請求項２記載の
発明を効果的に実施するためのシステムに関する発明
で、請求項３記載の堆肥化装置の臭気処理システムにお
いて、堆肥化装置から排出された臭気に液接触を行う前
記液接触工程を設けるとともに、前記液接触工程により
除塵された水分含有臭気を冷却により凝縮して、飽和湿
度以下にする凝縮工程と、前記凝縮工程により得られた
該飽和湿度以下の臭気の少なくとも一部を前記発酵槽の
通気側に返送する返送ラインを具えたことを特徴とす
る。A fourth aspect of the present invention relates to a system for effectively carrying out the second aspect of the present invention. In the odor treatment system for a composting apparatus according to the third aspect, the waste gas is discharged from the composting apparatus. The liquid contacting step of making liquid contact with the odor is provided, and the moisture-containing odor removed in the liquid contacting step is condensed by cooling to a saturation humidity or less, and the condensation step is performed by the condensation step. A return line for returning at least a part of the odor below the saturation humidity to the vent side of the fermenter is provided.
【００１２】[0012]
【発明の実施の形態】以下、図面を参照して本発明の好
適な実施例を例示的に詳しく説明する。但し、この実施
例に記載されている構成部品の寸法、材質、形状、その
相対的配置等は特に特定的な記載がない限りは、この発
明の範囲をそれに限定する趣旨出はなく、単なる説明例
にすぎない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, and are merely described. It is only an example.
【００１３】図１は本発明の第１実施形態に係る臭気処
理システムの構成図で、廃水処理工程で除去された余剰
汚泥は脱水工程で脱水され、厨芥等とともに発酵槽１内
で発酵された後、堆肥化する。該メタン発酵槽１から排
出された臭気は、活性汚泥との気液接触を図るために設
置された液接触塔４内で、廃水処理装置５より導かれた
活性汚泥と接触することにより液自体及び該汚泥中の好
気微生物分との接触によっても脱臭がなされて臭気濃度
が低減した後、中濃度臭気として後工程の脱臭装置に送
られる。該生物脱臭により臭気の粗取りをすることで約
９０％の臭気を脱臭することができる。FIG. 1 is a configuration diagram of an odor treatment system according to a first embodiment of the present invention. Excess sludge removed in a wastewater treatment process is dehydrated in a dehydration process, and is fermented in a fermenter 1 together with kitchen waste. Later, it is composted. The odor discharged from the methane fermentation tank 1 is brought into contact with the activated sludge introduced from the wastewater treatment device 5 in the liquid contact tower 4 installed for establishing gas-liquid contact with the activated sludge. The deodorization is also performed by contact with the aerobic microorganisms in the sludge, and the odor concentration is reduced. By roughly removing the odor by the biological deodorization, about 90% of the odor can be deodorized.
【００１４】図２は本発明の第２実施形態に係る臭気処
理システムの構成図で、前記脱水汚泥と厨芥等の混合物
は発酵槽１内で散気による好気化条件下で発酵すること
により発熱し、該発熱により蒸発した水分と粉塵を含ん
だ温度５０〜６０℃の臭気は液接触塔４にて除塵される
とともに液自体及び汚泥中の好気微生物分との接触によ
っても脱臭がなされ、４０〜５０℃に冷却された後凝縮
塔３に送り込まれる。該凝縮塔３には、コンプレッサを
用いた直接凝縮設備、または熱交換器とクーリングタワ
ー、チリングユニット、ヒートポンプ等の冷凍機を組み
合わせた間接凝縮設備を用いるのが好ましい。FIG. 2 is a block diagram of an odor treatment system according to a second embodiment of the present invention. The mixture of the dehydrated sludge and kitchen garbage is heated by fermentation in the fermenter 1 under aerobic conditions by aeration. Then, the odor at a temperature of 50 to 60 ° C. containing moisture and dust evaporated by the heat is removed in the liquid contact tower 4 and deodorized by contact with the liquid itself and the aerobic microorganisms in the sludge. After being cooled to 40 to 50 ° C., it is sent to the condensation tower 3. As the condensation tower 3, it is preferable to use a direct condensation equipment using a compressor or an indirect condensation equipment combining a heat exchanger and a refrigerator such as a cooling tower, a chilling unit and a heat pump.
【００１５】該凝縮塔３により常温（１５〜２５℃）に
冷却され、凝縮して飽和湿度以下に除湿された臭気を外
部排出させるとともに、該臭気の少なくとも一部を返送
ラインにより前記発酵槽１に返送し、循環させる。かか
る実施形態によれば換気に必要な通気の少なくとも一部
を循環利用することにより脱臭風量を大幅に削減するこ
とができる。The condensing tower 3 cools to room temperature (15 to 25 ° C.), discharges the odor condensed and dehumidified below the saturation humidity to the outside, and at least a part of the odor is returned to the fermenter 1 by a return line. Return to and circulate. According to this embodiment, the amount of deodorizing air can be significantly reduced by circulating and using at least a part of the ventilation required for ventilation.
【００１６】該液接触塔４には図３に示す充填式液接触
塔（ａ）とスプレー式液接触塔（ｂ）とがあり、堆肥化
工程（Ｓ６）から押込み式ファン８により臭気を送り込
み、廃水処理工程（Ｓ２）から供給される活性汚泥を、
夫々下記のように臭気と気液接触させて脱臭し、凝縮工
程（Ｓ９）へ排出するとともに、液接触塔４を通過した
活性汚泥は再び前記廃水処理工程（Ｓ２）に返送され、
循環する。The liquid contact tower 4 includes a filling type liquid contact tower (a) and a spray type liquid contact tower (b) shown in FIG. 3, and the odor is fed by the push-in fan 8 from the composting step (S6). Activated sludge supplied from the wastewater treatment step (S2)
Each of them is deodorized by contacting with odor and gas-liquid as described below, and is discharged to the condensation step (S9). The activated sludge that has passed through the liquid contact tower 4 is returned to the wastewater treatment step (S2) again.
Circulate.
【００１７】尚充填式液接触塔（ａ）においては塔頂部
に配設した液噴霧器４１より充填材６ａが充填された充
填層６内に活性汚泥が噴霧されながら、充填層６を通過
する臭気と気液接触され、又スプレー式液接触塔（ｂ）
においてはスプレーノズルにより、活性汚泥がスプレー
状に噴霧されながら該噴霧域を通過する臭気と気液接触
される構成を取る。In the packed type liquid contact tower (a), the odor passing through the packed bed 6 while the activated sludge is sprayed into the packed bed 6 filled with the filler 6a from the liquid sprayer 41 disposed at the top of the tower. Gas-liquid contact with a spray-type liquid contact tower (b)
In this method, activated sludge is sprayed in a spray form by a spray nozzle and comes into gas-liquid contact with the odor passing through the spray area.
【００１８】次に、第２実施形態を含む汚泥処理装置の
流れを図４のブロック図に基づいて説明する。先ず、し
渣除去（Ｓ１）したし尿や浄化槽汚泥を、脱窒素槽５ａ
と硝化槽５ｂ、二次脱窒素槽５ｃからなる廃水処理装置
５により廃水処理（Ｓ２）を行い、その上澄み液は凝集
分離／活性炭処理等の高度処理（不図示）を行った後、
放流される。Next, the flow of the sludge treatment apparatus including the second embodiment will be described with reference to the block diagram of FIG. First, the human waste and the septic tank sludge from which the residue has been removed (S1) are transferred to the denitrification tank 5a.
Wastewater treatment (S2) is performed by a wastewater treatment device 5 including a nitrification tank 5b and a secondary denitrification tank 5c, and the supernatant is subjected to advanced treatment (not shown) such as coagulation separation / activated carbon treatment.
Released.
【００１９】一方、前記廃水処理工程（Ｓ２）で固液分
離された余剰汚泥は、濃縮工程（Ｓ３）で濃縮され、生
ごみ等の厨芥を破砕工程（Ｓ４）において破砕した破砕
厨芥とともに、混合槽に投入され十分混合（Ｓ５）され
た後、メタン発酵工程（Ｓ６）にてメタン発酵される。
そして前記メタン発酵工程（Ｓ６）によりガス化したメ
タンガス等の消化ガスは、発電（Ｓ７）等に供され、処
理場内電力として利用されると共に、その脱水工程（Ｓ
１１）後の脱水ケーキはコンポスト化（Ｓ１２）されて
堆肥等に利用され、一方脱水濾液は活性汚泥装置等の廃
水処理工程（Ｓ２）に返送される。On the other hand, the excess sludge solid-liquid separated in the wastewater treatment step (S2) is concentrated in the concentration step (S3), and the garbage such as garbage is mixed with the crushed garbage crushed in the crushing step (S4). After being charged into the tank and sufficiently mixed (S5), methane fermentation is performed in the methane fermentation step (S6).
The digested gas such as methane gas gasified in the methane fermentation step (S6) is used for power generation (S7) and the like, is used as electric power in the treatment plant, and is used in the dehydration step (S6).
11) The dewatered cake is composted (S12) and used for compost, etc., while the dehydrated filtrate is returned to a wastewater treatment step (S2) such as an activated sludge apparatus.
【００２０】前記コンポスト化工程（Ｓ１２）におい
て、堆肥化する際に生じた飽和状態の臭気はファンによ
り活性汚泥による液接触工程（Ｓ８）に送られ、該液接
触工程（Ｓ８）により除塵、臭気の粗取りをした後、凝
縮工程（Ｓ９）で凝縮され飽和湿度以下となった臭気は
公知の脱臭装置（Ｓ１０）に送り込まれ、脱臭処理によ
り規定値以下の濃度まで処理された後排出される。前記
廃水処理工程（Ｓ２）で生成される活性汚泥は固液分離
装置５ｃから余剰汚泥として処理される一方で、硝化槽
５ｂから液接触工程（Ｓ８）に供給され、臭気脱臭と好
気化を図った後に、再び廃水処理工程（Ｓ２）の脱窒素
槽５ａに返送される。In the composting step (S12), the saturated odor generated during composting is sent by a fan to a liquid contacting step with activated sludge (S8), and the liquid contacting step (S8) removes dust and odor. After roughing, the odor condensed in the condensation step (S9) and reduced to the saturation humidity or less is sent to a known deodorizing device (S10), and is discharged after being processed to a concentration of a specified value or less by a deodorizing treatment. . The activated sludge generated in the wastewater treatment step (S2) is treated as surplus sludge from the solid-liquid separation device 5c, and is supplied from the nitrification tank 5b to the liquid contact step (S8) to achieve odor deodorization and aerobicization. After that, it is returned to the denitrification tank 5a in the wastewater treatment step (S2) again.
【００２１】[0021]
【発明の効果】以上記載のごとく本発明によれば、有機
性廃棄物の堆肥化により排出された臭気を廃水処理装置
から供給される循環活性汚泥を利用し脱臭することによ
り臭気濃度が低減され、また、該臭気を発酵槽の通気に
循環利用することにより液洗浄工程後工程側に排出され
る脱臭風量が減少され、該後工程における脱臭装置にか
かる負荷が低減されることから、脱臭処理における薬
剤、活性炭等の使用量の減少によるコストの低減や、従
来使用されていた水洗浄におけるコストの削減が可能と
なる。As described above, according to the present invention, the odor discharged by composting organic waste is deodorized by using circulating activated sludge supplied from a wastewater treatment apparatus, whereby the odor concentration is reduced. In addition, since the amount of deodorized air discharged to the process side after the liquid washing step is reduced by circulating and utilizing the odor for ventilation of the fermenter, the load on the deodorizing device in the subsequent step is reduced. It is possible to reduce costs by reducing the amount of chemicals, activated carbon and the like used in the above, and to reduce the cost of water washing which has been conventionally used.
【図１】 本発明の第１実施形態に係る臭気処理システ
ムを示す構成図である。FIG. 1 is a configuration diagram showing an odor treatment system according to a first embodiment of the present invention.
【図２】 本発明の第２実施形態に係る臭気処理システ
ムを示す構成図である。FIG. 2 is a configuration diagram illustrating an odor treatment system according to a second embodiment of the present invention.
【図３】 本発明に組み込まれた液接触塔の概略図を示
す。FIG. 3 shows a schematic view of a liquid contact tower incorporated in the present invention.
【図４】 本発明が適用される廃水処理システムの全体
概要を示す全体システムブロック図である。FIG. 4 is an overall system block diagram showing an overall outline of a wastewater treatment system to which the present invention is applied.
【図５】 従来技術に係る臭気処理プロセスを示すブロ
ック図である。FIG. 5 is a block diagram showing an odor treatment process according to the related art.
１ 発酵槽 ２ 水洗浄塔 ３ 凝縮等 ４ 液接触塔 ５ 廃水処理装置 ５ａ 脱窒素槽 ５ｂ 硝化槽 ５ｃ 固液分離装置 ６ 充填層 ７ スプレーノズル ８ ファン (Ｓ２) 廃水処理工程 (Ｓ６) メタン発酵工程 (Ｓ８) 液接触工程 (Ｓ９) 凝縮工程 （Ｓ１２） コンポスト化工程 DESCRIPTION OF SYMBOLS 1 Fermentation tank 2 Water washing tower 3 Condensation etc. 4 Liquid contact tower 5 Wastewater treatment equipment 5a Denitrification tank 5b Nitrification tank 5c Solid-liquid separation equipment 6 Packing bed 7 Spray nozzle 8 Fan (S2) Wastewater treatment step (S6) Methane fermentation step (S8) Liquid contact step (S9) Condensing step (S12) Composting step
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０５Ｆ 9/02 ＺＡＢ Ｆターム(参考） 4D002 AB02 AC10 BA02 BA13 BA14 BA17 CA01 CA07 DA59 GA01 GB02 GB03 HA10 4D004 AA02 AC05 BA03 BA04 CA18 CA32 CA48 CB05 CC07 DA03 DA06 DA08 4D059 AA01 AA02 AA05 BA12 BE01 BK01 CA15 CA17 CC01 CC03 4H061 AA03 AA10 CC51 CC55 DD20 EE51 GG49 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C05F 9/02 ZAB F-term (Reference) 4D002 AB02 AC10 BA02 BA13 BA14 BA17 CA01 CA07 DA59 GA01 GB02 GB03 HA10 4D004 AA02 AC05 BA03 BA04 CA18 CA32 CA48 CB05 CC07 DA03 DA06 DA08 4D059 AA01 AA02 AA05 BA12 BE01 BK01 CA15 CA17 CC01 CC03 4H061 AA03 AA10 CC51 CC55 DD20 EE51 GG49
Claims (4)
させながら発酵させる発酵槽内に、少なくとも飽和湿度
以下の大気を通気させ、前記発酵槽内で発生した水分等
とともに前記散気分と通気分とからなる臭気を外部排出
させる堆肥化装置における臭気処理方法において、 前記堆肥化装置より排出された粉塵や水分を含んだ臭気
と、廃水処理装置より得られる活性汚泥の少なくとも一
部を含む液とを液接触させて臭気処理を行うことを特徴
とする堆肥化装置の臭気処理方法。A fermenter for fermenting organic waste such as dewatered sludge and kitchen garbage while aerating the same is aerated at least at a saturation humidity or lower. In the odor treatment method in the composting device that externally discharges the odor composed of and aeration, the odor containing dust and water discharged from the composting device and at least a part of the activated sludge obtained from the wastewater treatment device An odor treatment method for a composting device, wherein an odor treatment is performed by bringing a liquid containing the liquid into contact with the liquid.
分を含んだ臭気を液接触により除塵した後前記水分を凝
縮して、飽和湿度以下にした後、該飽和湿度以下の臭気
の少なくとも一部を前記発酵槽の散気・通気側に返送
し、循環させることを特徴とする請求項１記載の堆肥化
装置の臭気処理方法。2. The method according to claim 1, wherein the odor containing dust and water discharged from the composting apparatus is removed by liquid contact, and then the water is condensed to reduce the odor to a saturation humidity or less. The odor treatment method for a composting device according to claim 1, wherein the part is returned to the aeration / aeration side of the fermenter and circulated.
ン発酵して、残留したメタン発酵汚泥に散気させながら
発酵させる発酵槽内に、少なくとも飽和湿度以下の大気
を通気させ、前記発酵槽内で発生した水分等とともに前
記散気分と通気分とからなる臭気を外部排出させる堆肥
化装置における臭気処理システムにおいて、 前記堆肥化装置の臭気排出側に、廃水処理装置で循環し
ている活性汚泥の少なくとも一部が導かれる液接触工程
を設け、該工程内で前記堆肥化装置より排出された粉塵
や水分を含む臭気と活性汚泥とを接触させることを特徴
とする堆肥化装置の臭気処理システム。3. A fermentation tank for fermenting organic waste such as dehydrated sludge and kitchen waste by methane fermentation and diffusing the remaining methane fermentation sludge while aeration is performed. In an odor treatment system in a composting device that externally discharges the odor composed of the diffused air and the aerated component together with water generated in a tank, the activity circulated in a wastewater treatment device on the odor discharge side of the composting device. Providing a liquid contacting step in which at least a part of the sludge is introduced, and contacting the activated sludge with an odor containing dust and water discharged from the composting apparatus in the step; system.
を行う前記液接触工程を設けると共に、 前記液接触工程により除塵された水分含有臭気を冷却に
より凝縮して、飽和湿度以下にする凝縮工程と、 前記凝縮工程により得られた該飽和湿度以下の臭気の少
なくとも一部を前記発酵槽の通気側に返送する返送ライ
ンとを具えたことを特徴とする請求項３記載の堆肥化装
置の臭気処理システム。4. The method according to claim 1, further comprising the step of contacting the odor discharged from the composting apparatus with a liquid, and condensing the water-containing odor removed by the liquid contacting step by cooling to a saturation humidity or less. And a return line for returning at least a part of the odor less than or equal to the saturation humidity obtained in the condensation step to the ventilation side of the fermenter. Odor treatment system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24839499A JP3510539B2 (en) | 1999-09-02 | 1999-09-02 | Odor treatment method and system for composting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24839499A JP3510539B2 (en) | 1999-09-02 | 1999-09-02 | Odor treatment method and system for composting equipment |
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| Publication Number | Publication Date |
|---|---|
| JP2001070744A true JP2001070744A (en) | 2001-03-21 |
| JP3510539B2 JP3510539B2 (en) | 2004-03-29 |
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ID=17177464
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24839499A Expired - Fee Related JP3510539B2 (en) | 1999-09-02 | 1999-09-02 | Odor treatment method and system for composting equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008253871A (en) * | 2007-03-30 | 2008-10-23 | Mitsui Eng & Shipbuild Co Ltd | Co-fermentation method |
| JP2015196121A (en) * | 2014-03-31 | 2015-11-09 | クボタ環境サ−ビス株式会社 | Purification system, and method for removing odor in gas to be treated |
| JP2016179432A (en) * | 2015-03-24 | 2016-10-13 | クボタ環境サ−ビス株式会社 | Deodorization apparatus, deodorization system, and deodorization method |
| JP7322312B1 (en) * | 2023-03-09 | 2023-08-07 | 三菱重工環境・化学エンジニアリング株式会社 | Deodorizing equipment and deodorizing system |
-
1999
- 1999-09-02 JP JP24839499A patent/JP3510539B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008253871A (en) * | 2007-03-30 | 2008-10-23 | Mitsui Eng & Shipbuild Co Ltd | Co-fermentation method |
| JP2015196121A (en) * | 2014-03-31 | 2015-11-09 | クボタ環境サ−ビス株式会社 | Purification system, and method for removing odor in gas to be treated |
| JP2016179432A (en) * | 2015-03-24 | 2016-10-13 | クボタ環境サ−ビス株式会社 | Deodorization apparatus, deodorization system, and deodorization method |
| JP7322312B1 (en) * | 2023-03-09 | 2023-08-07 | 三菱重工環境・化学エンジニアリング株式会社 | Deodorizing equipment and deodorizing system |
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| Publication number | Publication date |
|---|---|
| JP3510539B2 (en) | 2004-03-29 |
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