JPH0663346A - Biological deodorization device - Google Patents
Biological deodorization deviceInfo
- Publication number
- JPH0663346A JPH0663346A JP4242544A JP24254492A JPH0663346A JP H0663346 A JPH0663346 A JP H0663346A JP 4242544 A JP4242544 A JP 4242544A JP 24254492 A JP24254492 A JP 24254492A JP H0663346 A JPH0663346 A JP H0663346A
- Authority
- JP
- Japan
- Prior art keywords
- tower
- biological deodorization
- deodorization tower
- ammonia
- biological
- 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.)
- Pending
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
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、し尿処理場、下水処
理場、その他各種工場から発生する悪臭ガスの悪臭成分
を活性汚泥等の微生物により生物学的に分解して脱臭す
る生物脱臭装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biological deodorizer for biologically deodorizing malodorous components of malodorous gas generated from human waste treatment plants, sewage treatment plants and other factories by biologically decomposing them with microorganisms such as activated sludge. .
【０００２】[0002]
【従来の技術】し尿処理場、下水処理場から発生する悪
臭ガスは硫黄系物質（硫化水素、メチルメルカプタン、
硫化メチル、二硫化メチル）が悪臭主成分であるが、し
尿処理施設の前処理設備や、汚泥処理設備から発生する
悪臭ガスは高濃度のアンモニアを含むのが普通である。
また、下水の汚泥処理で消石灰を使用する場合もアンモ
ニアの発生が多い。このようなアンモニアを含む悪臭ガ
スを脱臭するため、塔内に、悪臭成分を分解する微生物
を担持した繊維状ピートの充填層を設け、この充填層に
悪臭ガスを上向流で通気し、繊維状ピートが担持する微
生物で悪臭成分を酸化分解することが従来から行なわれ
ている。2. Description of the Related Art Odorous gas generated from human waste treatment plants and sewage treatment plants is a sulfur-based substance (hydrogen sulfide, methyl mercaptan,
Methyl sulfide and methyl disulfide) are the main components of the malodor, but the malodorous gas generated from the pretreatment facility of the human waste treatment facility and the sludge treatment facility usually contains high concentration of ammonia.
Also, when slaked lime is used in sludge treatment of sewage, ammonia is often generated. In order to deodorize such malodorous gas containing ammonia, a packing layer of fibrous peat supporting microorganisms that decomposes malodorous components is provided in the tower, and the malodorous gas is aerated in an upward flow to the packing layer, It has been a conventional practice to oxidize and decompose malodorous components with microorganisms carried by the peat.
【０００３】[0003]
【発明が解決しようとする課題】上記生物脱臭塔で硫黄
系の臭気成分と、アンモニアを含む悪臭ガスを処理する
と、アンモニアの溶解によって充填層のｐＨが上昇し、
硫黄系の臭気成分の除去性能が低下する。そして、アン
モニアが直接生物脱臭塔に入るので、アンモニアが一部
酸化分解され、亜硝酸イオン（ＮＯ2 -）、硝酸イオン
（ＮＯ3 -）が生成するため硫酸イオンを中和する効果が
減少する。又、悪臭ガス中のアンモニアの濃度の変動に
より充填層のｐＨが変動し、脱臭処理が安定しない。こ
れは、充填層中の硫黄系臭気成分を分解する微生物は酸
性〜中性の領域で高い活性を示すからである。When a sulfur-based odor component and a malodorous gas containing ammonia are treated in the above biological deodorization tower, the pH of the packed bed rises due to the dissolution of ammonia,
The ability to remove sulfur-based odorous components is reduced. Since ammonia enters the direct biological deodorization tower, ammonia is partially oxidized and decomposed, nitrite (NO 2 -), nitrate ion (NO 3 -) is reduced the effect of neutralizing the sulfate ions to generate . Further, the pH of the packed bed fluctuates due to the fluctuation of the concentration of ammonia in the malodorous gas, and the deodorizing process is not stable. This is because the microorganism that decomposes the sulfur-based odor component in the packed bed exhibits high activity in the acidic to neutral region.
【０００４】[0004]
【課題を解決するための手段】そこで本発明は、生物脱
臭塔の前段で悪臭ガス中のアンモニアを除去し、これに
より生物脱臭塔での硫黄系臭気成分の除去性能を安定さ
せるようにしたのであって、悪臭成分を分解する微生物
を坦持した充填材層を内部に有し、悪臭ガスを上記充填
材層に上向流で通気して脱臭する生物脱臭塔の前段に洗
浄塔を設置し、前記生物脱臭塔の洗浄廃水を洗浄水とし
て洗浄塔に供給するようにしたことを特徴とする。Therefore, according to the present invention, ammonia in odorous gas is removed before the biological deodorization tower, thereby stabilizing the removal performance of the sulfur-based odorous components in the biological deodorization tower. Therefore, it has a packing material layer carrying microorganisms that decomposes malodorous components inside, and a washing tower is installed in the preceding stage of the biological deodorization tower that deodorizes by deodorizing the malodorous gas by upwardly ventilating the packing material layer. The cleaning wastewater of the biological deodorizing tower is supplied to the cleaning tower as cleaning water.
【０００５】[0005]
【実施例】図示の実施例において、１は生物脱臭塔で、
底部に悪臭ガスの給気管２、内部には上下二段に充填層
３と４、各充填層３と４に洗浄水を上から散布する散水
管５と６が設けられている。充填層３と４は、例えば繊
維状ピートからなり、目開き８ｍｍ程度の篩でふるって
短繊維を除いた長繊維のピートを使用する。充填層３と
４を構成したら、散水管５と６で充填層３と４に活性汚
泥の希釈水、活性汚泥処理水などを散布し、硝化菌、硫
黄菌等の微生物を繊維状ピート８に植菌し、給気管２か
ら生物脱臭塔１内の底部に悪臭ガスを給気し、下段の充
填層３、次に上段の充填層４に上向流で通気させる。通
常、馴養に約１カ月間を要し、その後は安定した脱臭効
果が得られる。この通気により下段の充填層３に付着し
た微生物は悪臭ガス中の硫化水素を硫酸へ酸化分解する
ほか、メチルメルカプタン、硫化メチル、二流化メチル
等も酸化分解し、上段の充填層４に付着した微生物は下
段の充填層で酸化分解されずに残った臭気成分を酸化分
解する。こうして、悪臭ガスの臭気成分は上下二段の充
填層中を上向流することによって分解除去され、各充填
層中には分解生成物が生じるため散水管５，６で洗浄水
を各充填層に上から散布し、生成物を充填層から洗い出
す。従って、生物脱臭塔の底部には硫酸イオン（ＳＯ4
-- ）の濃度が高い酸性液が洗浄廃水として生じる。
尚、各充填層３，４の下部は生成した硫酸イオンにより
酸性ではあるが、上部は散水によってほゞ中性に保持さ
れる。In the illustrated embodiment, 1 is a biological deodorization tower,
A malodorous gas supply pipe 2 is provided at the bottom portion, filling layers 3 and 4 are provided inside and below in two stages, and sprinkling pipes 5 and 6 for spraying washing water from the filling layers 3 and 4 from above. The filling layers 3 and 4 are made of fibrous peat, for example, and the long fiber peat obtained by sieving with a sieve having an opening of about 8 mm to remove short fibers is used. After the packed beds 3 and 4 are formed, the sprinkling pipes 5 and 6 spray the diluted water of the activated sludge, the activated sludge treated water, etc. on the packed beds 3 and 4, and the microorganisms such as nitrifying bacteria and sulfur bacteria are dispersed in the fibrous peat 8. The bacteria are inoculated, and a malodorous gas is supplied from the air supply pipe 2 to the bottom of the biological deodorization tower 1, and the lower packed bed 3 and then the upper packed bed 4 are ventilated in an upward flow. Usually, it takes about one month for acclimatization, after which a stable deodorizing effect is obtained. Due to this ventilation, the microorganisms attached to the lower packed layer 3 oxidize and decompose hydrogen sulfide in the malodorous gas to sulfuric acid, and also oxidatively decompose methyl mercaptan, methyl sulfide, methyl difluide, etc., and adhered to the upper packed layer 4. The microorganisms oxidize and decompose the odorous components remaining in the lower packed bed without being oxidatively decomposed. In this way, the odorous components of the malodorous gas are decomposed and removed by flowing upward in the two upper and lower packed beds, and decomposition products are produced in each packed bed. And spray the product over the top of the packed bed. Therefore, at the bottom of the biological deodorization tower, sulfate ions (SO 4
An acidic liquid with a high concentration of-) is generated as washing wastewater.
The lower parts of the packed layers 3 and 4 are acidic due to the generated sulfate ions, but the upper parts are kept almost neutral by water sprinkling.
【０００６】この生物処理塔１の前段には充填層１２を
内部に有する洗浄塔１１を設置し、充填層１２上に設け
た散水管１３と、前記生物脱臭塔１の底部とをポンプＰ
を備えた連絡管１４で接続し、硫酸イオン濃度の高い酸
性液を散水管１３に供給する。尚、充填層１２の材料は
ラシヒリング等である。A washing tower 11 having a packed bed 12 inside is installed at the front stage of the biological treatment tower 1, and a sprinkling pipe 13 provided on the packed bed 12 and a bottom portion of the biological deodorization tower 1 are pumped by a pump P.
Is connected to the sprinkler pipe 13 to supply an acidic liquid having a high sulfate ion concentration. The material of the filling layer 12 is Raschig ring or the like.
【０００７】処理すべき、アンモニアを含む悪臭ガスは
給気管１５で洗浄塔の充填層１２の下に給気する。この
充填層１２には散水管１３により生物脱臭塔で生じた硫
酸イオン濃度の高い酸性液を散布しているため、悪臭ガ
スが充填層１２中を上向流する際、ガス中のアンモニア
は上記酸性液と接触して除去され、酸性液は中和されて
塔底に流下し、一部は塔外にブローされ、残部はポンプ
Ｐが散水管１３に供給する酸性液と混合して循環する。The malodorous gas containing ammonia, which is to be treated, is supplied to the bottom of the packed bed 12 of the washing tower by the air supply pipe 15. Since the acidic liquid having a high sulfate ion concentration generated in the biological deodorization tower is sprayed on the packed bed 12 by the sprinkling pipe 13, when the malodorous gas flows upward in the packed bed 12, the ammonia in the gas is The acid solution is removed by contact with the acid solution, the acid solution is neutralized and flows down to the bottom of the tower, a part is blown out of the tower, and the rest is mixed with the acid solution supplied to the sprinkler pipe 13 by the pump P and circulated. .
【０００８】こうしてアンモニアを除去された悪臭ガス
は洗浄塔の塔頂から給気管２で生物脱臭塔１の底部に供
給し、前述したように悪臭ガス中の硫黄系物質をこゝで
酸化分解するのである。The offensive odor gas from which ammonia has been removed in this manner is supplied from the top of the washing tower to the bottom of the biological deodorization tower 1 through the air supply pipe 2, and as described above, the sulfur-based substance in the offensive odor gas is oxidatively decomposed. Of.
【０００９】し尿処理施設から発生した悪臭ガスを洗浄
塔で処理せず直接生物脱臭塔で処理した場合（Ａ）と、
洗浄塔で処理したのち生物脱臭塔で更に処理した場合
（Ｂ）の結果を〈表１〉に示す。尚、臭気成分の濃度は
ｐｐｍである。When the malodorous gas generated from the night soil treatment facility is directly treated in the biological deodorization tower without being treated in the washing tower (A),
The results of the case (B) in which the treatment is performed in the washing tower and then in the biological deodorization tower are shown in Table 1. The concentration of the odorous component is ppm.
【表１】 生物脱臭塔の出口では（Ａ）にくらべて（Ｂ）の値が遥
かに小さく、脱臭効果が優れていることが明らかであ
る。[Table 1] At the outlet of the biological deodorization tower, the value of (B) is much smaller than that of (A), and it is clear that the deodorizing effect is excellent.
【００１０】[0010]
【発明の効果】以上で明らかなように、本発明はアンモ
ニアを含む悪臭ガスを生物脱臭塔で脱臭処理するに際
し、前段の洗浄塔でアンモニアを除去するので、生物脱
臭塔が酸化分解するのは主に硫黄系物質の臭気成分であ
る。従って、生物脱臭塔の充填層はアンモニアの溶解に
よるｐＨの上昇、アンモニアの濃度の変動によるｐＨの
変動が生じないため、硫黄系物質の臭気成分を効率的
に、安定して酸化、分解し、除去することができ、脱臭
効果は極めて高い。更に、アンモニアを除去するため洗
浄塔の充填層に散水する液に、生物脱臭塔の洗浄廃水で
ある硫酸イオン濃度が高い酸性液を使用するので、この
酸性液はアンモニアと接触して中和される。従って、生
物脱臭塔の洗浄廃水を、別途、中和処理して放水する必
要が無くなり、一石二鳥の効果がある。EFFECTS OF THE INVENTION As is clear from the above, when deodorizing a malodorous gas containing ammonia in the biological deodorization tower according to the present invention, the ammonia is removed in the cleaning tower in the previous stage, so that the biological deodorization tower does not undergo oxidative decomposition. It is mainly an odor component of sulfur-based substances. Therefore, the packed bed of the biological deodorization tower does not raise the pH due to the dissolution of ammonia and does not fluctuate due to the fluctuation of the ammonia concentration, so that the odorous component of the sulfur-based substance is efficiently and stably oxidized and decomposed, It can be removed and the deodorizing effect is extremely high. Further, since an acidic liquid with a high concentration of sulfate ions, which is the waste water for cleaning the biological deodorizing tower, is used as the liquid that is sprayed on the packed bed of the cleaning tower to remove ammonia, this acidic liquid is neutralized by contact with ammonia. It Therefore, it is not necessary to separately neutralize the washing wastewater of the biological deodorization tower and then discharge the water, which has the effect of two birds with one stone.
【図１】本発明の一実施例を示すフローシートである。FIG. 1 is a flow sheet showing an embodiment of the present invention.
１ 生物脱臭塔 ２ 給気管 ３ 充填層 ４ 充填層 ５ 散水管 １１ 洗浄塔 １２ 充填層 １３ 散水管 １４ 連絡管 １５ 給気管 1 Biological deodorization tower 2 Air supply pipe 3 Packing bed 4 Packing bed 5 Sprinkling pipe 11 Washing tower 12 Packing bed 13 Sprinkling pipe 14 Communication pipe 15 Air feeding pipe
Claims (1)
填材層を内部に有し、悪臭ガスを上記充填材層に上向流
で通気して脱臭する生物脱臭塔の前段に洗浄塔を設置
し、前記生物脱臭塔の洗浄廃水を洗浄水として洗浄塔に
供給するようにしたことを特徴とする生物脱臭装置。1. A washing tower is provided in front of a biological deodorization tower which has a packing material layer carrying microorganisms capable of decomposing malodorous components therein, and which deodorizes the packing material layer by aerating upward flow of malodorous gas. A biological deodorization device, which is installed and is configured to supply the cleaning wastewater of the biological deodorization tower as cleaning water to the cleaning tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4242544A JPH0663346A (en) | 1992-08-20 | 1992-08-20 | Biological deodorization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4242544A JPH0663346A (en) | 1992-08-20 | 1992-08-20 | Biological deodorization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0663346A true JPH0663346A (en) | 1994-03-08 |
Family
ID=17090692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4242544A Pending JPH0663346A (en) | 1992-08-20 | 1992-08-20 | Biological deodorization device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663346A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010035671A (en) * | 1999-10-01 | 2001-05-07 | 김희용 | Biofilter system packed by porous media for removal of malodor gas |
| DE19757876C2 (en) * | 1997-12-24 | 2002-06-20 | Bosch Gmbh Robert | Method for determining the utilization of a computing device |
-
1992
- 1992-08-20 JP JP4242544A patent/JPH0663346A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19757876C2 (en) * | 1997-12-24 | 2002-06-20 | Bosch Gmbh Robert | Method for determining the utilization of a computing device |
| KR20010035671A (en) * | 1999-10-01 | 2001-05-07 | 김희용 | Biofilter system packed by porous media for removal of malodor gas |
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