JP2005007241A - Anaerobic tank - Google Patents

Anaerobic tank Download PDF

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Publication number
JP2005007241A
JP2005007241A JP2003172212A JP2003172212A JP2005007241A JP 2005007241 A JP2005007241 A JP 2005007241A JP 2003172212 A JP2003172212 A JP 2003172212A JP 2003172212 A JP2003172212 A JP 2003172212A JP 2005007241 A JP2005007241 A JP 2005007241A
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Japan
Prior art keywords
anaerobic tank
water
contact material
tank
metal
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Pending
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JP2003172212A
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Japanese (ja)
Inventor
Soetsu Kitamura
総謁 北村
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Inax Corp
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Inax Corp
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Filing date
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Priority to JP2003172212A priority Critical patent/JP2005007241A/en
Publication of JP2005007241A publication Critical patent/JP2005007241A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Treating Waste Gases (AREA)
  • Removal Of Specific Substances (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To attain the deodorization of an anaerobic tank and prevention in the outflow of phosphoric acid ions therefrom. <P>SOLUTION: Contact materials 2 and 4 each consisting of a metal such as iron, aluminum and magnesium are arranged on the upper part in an anaerobic treatment tank 1. Sulfur compound-containing odor gas components generated from the inside of water are contacted with the contact materials 2 or 4, are subjected to oxidative decomposition by microorganisms on the surfaces of the contact materials 2 or 4, and are deodorized. Sulfuric acid produced by the oxidative decomposition is reacted with the metal to be formed into a sulfate. Moisture comprising the sulfate is made into a droplet state and falls or falls along the water in the anaerobic tank 1 so as to be added to the water. In this way, the sulfate and phosphoric acid ions in the water are reacted to produce a sparingly soluble phosphate. The sparingly soluble phosphate settles inside the anaerobic tank 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、嫌気槽に係り、特に脱臭手段及び可溶性リンの流出防止手段を備えた嫌気槽に関する。
【0002】
【従来の技術】
I.嫌気槽から発生する硫化水素、硫化メチル等の硫黄化合物(特に硫化物)を微生物の作用によって酸化して脱臭するようにした嫌気槽が特許第3313027号に記載されている。
【0003】
同号では、槽の上部に網状体を水平に張設し、この網状体の上にポリウレタンフォームよりなる多孔質担体を積載している。この多孔質担体に硫黄酸化細菌等の微生物が担持されており、汚水から生じる悪臭ガス成分が微生物によって分解され、無臭化される。
【0004】
II.嫌気槽からのリン酸イオンの流出を防止するために、嫌気槽内の水に接触するように金属鉄を配置することが特開平6−142687号に記載されている。この金属鉄から溶出した鉄イオンが水中のリン酸イオンと反応して難溶性リン酸鉄塩が生成し、これにより嫌気槽からのリン酸イオンの流出が防止される。
【0005】
【特許文献1】
特許第3313027号
【特許文献2】
特開平6−142687号
【0006】
【発明が解決しようとする課題】
本発明は、臭気成分の分解とリン酸イオンの流出防止とを行うことができる手段を備えた嫌気槽を提供することを目的とする。
【0007】
【課題を解決するための手段】
本発明の嫌気槽は、槽内の水面よりも上位に接触材が配置され、該接触材表面における微生物の作用によって硫黄化合物を酸化して脱臭するようにした嫌気槽において、該接触材は、硫酸に可溶であると共に、硫酸塩としてリン酸イオンと接触したときに難溶性リン酸塩を生成させる金属又はその化合物を含むことを特徴とするものである。
【0008】
かかる嫌気槽にあっては、発生した硫化水素等の硫黄化合物を含んだ臭気成分が接触材に接触すると、該接触材表面の微生物によって酸化分解されて脱臭される。この硫黄化合物の酸化により硫酸が生成する。生成した硫酸は、接触を構成する金属を溶解させるか、又は金属化合物と反応してこの金属の硫酸塩が生成する。この硫酸塩を含んだ水滴が落下して嫌気槽内の水に該硫酸塩が添加され、水中のリン酸イオンと反応して難溶性リン酸塩が生成する。これにより、嫌気槽からのリン酸イオンの流出が防止される。
【0009】
上記の金属としては、鉄、アルミニウム、マグネシウム等が例示される。接触材はその全体が嫌気槽内の水面よりも上方に配置されてもよいが、下部が嫌気槽内の水に浸るように配置されてもよい。後者のように構成すると、嫌気槽が湿潤し、微生物が繁殖し易くなる。
【0010】
接触材は、上記の金属又はその化合物のみから成ってもよく、樹脂をバインダーとして固めたもの等の複合材であってもよい。
【0011】
【発明の実施の形態】
以下、図面を参照して実施の形態について説明する。
【0012】
図1(a),(b),(c)は本発明の実施の形態に係る嫌気槽の概略的な縦断面図である。なお、この実施の形態では嫌気槽は嫌気処理槽である。
【0013】
図1(a)では、嫌気処理槽1に汚水が流入管1aを介して流入し、内部で嫌気処理され、処理水が流出管1bを介して流出する。嫌気処理槽1内には、この流出管1bのレベルにまで水が溜まっている。
【0014】
この嫌気処理槽1内の水面WLよりも上方の気相部分に接触材2が配置されている。この接触材2は鉄、アルミニウム、マグネシウムが好適であるが、これらの1種又は2種以上を含む合金であってもよい。
【0015】
金属よりなる接触材2は、例えば、ワイヤ状、紐状、リボン状、棒状、板状、あるいは塊状とされて嫌気槽1の天井から吊り下げられてもよく、梁の如く横断するように設けられてもよい。また、塊状、粒状、ワイヤ状あるいは短棒状の金属を合成樹脂のネットに入れて天井から吊り下げてもよい。
【0016】
金属板や金属棒を格子状あるいはジャングルジム状に組み合わせて嫌気槽1の上部に設置してもよい。
【0017】
金属は多孔質であってもよく、非多孔質であってもよい。多孔質とすれば、微生物の担持量が増え、脱臭効果が向上する。
【0018】
図1(b)では、嫌気槽1内の水面位WLよりも上方にネットやメッシュ、パンチングプレート等の孔明き板、格子等よりなる通気性の支持体3を略水平に設け、この支持体3の上に接触材4を積載している。この接触材4は、好ましくは鉄、アルミニウム、マグネシウム等の金属よりなる。この接触材4は、塊状、粒状、棒状、板状、ワイヤ状、紐状、リボン状などの形態とされることが好ましい。接触材4は多孔質であってもよく、非多孔質であってもよい。
【0019】
図1(b)では支持体3を水面位WLよりも上方に配置しているが、図1(c)では支持体3を水面位WLよりも若干下位とし、該支持体3上の接触材4の積載層の下部が水に浸るようになっている。これにより、接触材4の全体に湿気が十分に行き渡り、接触材4の表面が十分に湿潤したものとなり、微生物が繁殖し易くなる。
【0020】
図1(a)〜(c)のいずれにおいても、水中から発生した硫黄化合物含有臭気ガス成分は、接触材2又は4と接触し、該接触材2又は4の表面の微生物によって酸化分解されて脱臭される。酸化分解によって生じた硫酸が金属と反応して硫酸塩となり、この硫酸塩を含んだ水分が水滴状となって嫌気槽1内の水中に落下ないし伝わり落ちて該水に添加される。これにより、硫酸塩と水中のリン酸イオンとが反応し、難溶性リン酸塩が生成する。この難溶性リン酸塩は嫌気槽1内に沈降する。このようにして、脱臭処理とリン酸イオンの除去処理とが行われる。また、槽がコンクリート製の場合、硫酸によってコンクリートが侵食されることが防止される。なお、図1(b),(c)の場合、接触材が消耗してきたときに上から補充することができる。
【0021】
上記実施の形態は本発明の一例であり、本発明は図示以外の形態をもとりうる。例えば、図1(a)においても、接触材2の下部を水中に浸漬させてもよい。また、図1(c)では支持体3を傾斜させ、例えば支持体3の左半側のみが水中に浸り右半側は水面上方に位置するようにしてもよい。支持体3を傾斜させる代りに、支持体3の一部に有底筒状の下方延出部を設け、この下方延出部の下部を水中に浸漬させてもよい。
【0022】
【発明の効果】
以上の通り、本発明によると、嫌気槽の脱臭とリン酸イオンの流出防止を図ることができる。
【図面の簡単な説明】
【図1】実施の形態に係る嫌気槽の概略的な縦断面図である。
【符号の説明】
1 嫌気処理層
2,4 接触材
3 支持体
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anaerobic tank, and more particularly to an anaerobic tank provided with deodorizing means and soluble phosphorus outflow prevention means.
[0002]
[Prior art]
I. Japanese Patent No. 3313027 discloses an anaerobic tank in which sulfur compounds (particularly sulfides) such as hydrogen sulfide and methyl sulfide generated from an anaerobic tank are oxidized and deodorized by the action of microorganisms.
[0003]
In the same issue, a net is horizontally stretched on the upper part of a tank, and a porous carrier made of polyurethane foam is loaded on the net. Microorganisms such as sulfur-oxidizing bacteria are supported on the porous carrier, and malodorous gas components generated from sewage are decomposed by the microorganisms and are not brominated.
[0004]
II. In order to prevent the outflow of phosphate ions from the anaerobic tank, Japanese Patent Application Laid-Open No. 6-142687 describes disposing metallic iron so as to contact water in the anaerobic tank. The iron ions eluted from the metallic iron react with phosphate ions in water to form poorly soluble iron phosphate salts, thereby preventing phosphate ions from flowing out of the anaerobic tank.
[0005]
[Patent Document 1]
Japanese Patent No. 3313027 [Patent Document 2]
JP-A-6-142687 [0006]
[Problems to be solved by the invention]
An object of this invention is to provide the anaerobic tank provided with the means which can perform the decomposition | disassembly of an odor component, and the outflow prevention of a phosphate ion.
[0007]
[Means for Solving the Problems]
In the anaerobic tank of the present invention, the contact material is arranged above the water surface in the tank, and in the anaerobic tank in which sulfur compounds are oxidized and deodorized by the action of microorganisms on the surface of the contact material, the contact material is It contains a metal or a compound thereof that is soluble in sulfuric acid and that forms a sparingly soluble phosphate when it comes into contact with phosphate ions as a sulfate.
[0008]
In such an anaerobic tank, when the generated odor component containing a sulfur compound such as hydrogen sulfide comes into contact with the contact material, it is oxidatively decomposed and deodorized by microorganisms on the surface of the contact material. Sulfuric acid is produced by oxidation of the sulfur compound. The produced sulfuric acid dissolves the metal constituting the contact or reacts with the metal compound to produce a sulfate of this metal. The water droplets containing the sulfate drop and the sulfate is added to the water in the anaerobic tank, and reacts with phosphate ions in the water to form a hardly soluble phosphate. Thereby, the outflow of the phosphate ion from an anaerobic tank is prevented.
[0009]
Examples of the metal include iron, aluminum, and magnesium. Although the whole contact material may be arrange | positioned above the water surface in an anaerobic tank, you may arrange | position so that a lower part may be immersed in the water in an anaerobic tank. If comprised like the latter, an anaerobic tank will become wet and it will become easy to propagate microorganisms.
[0010]
The contact material may be composed of only the above metal or a compound thereof, or may be a composite material such as a material obtained by solidifying a resin as a binder.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings.
[0012]
1A, 1B and 1C are schematic longitudinal sectional views of an anaerobic tank according to an embodiment of the present invention. In this embodiment, the anaerobic tank is an anaerobic treatment tank.
[0013]
In FIG. 1A, sewage flows into the anaerobic treatment tank 1 through the inflow pipe 1a, is anaerobically treated inside, and the treated water flows out through the outflow pipe 1b. In the anaerobic treatment tank 1, water is accumulated up to the level of the outflow pipe 1b.
[0014]
The contact material 2 is disposed in the gas phase portion above the water surface WL in the anaerobic treatment tank 1. The contact material 2 is preferably iron, aluminum, or magnesium, but may be an alloy containing one or more of these.
[0015]
The contact material 2 made of metal may be suspended from the ceiling of the anaerobic tank 1 in a wire shape, a string shape, a ribbon shape, a rod shape, a plate shape, or a lump shape, and provided so as to cross like a beam. May be. Alternatively, lump-like, granular, wire-like or short-bar-like metal may be put in a synthetic resin net and hung from the ceiling.
[0016]
A metal plate or a metal rod may be combined in a lattice shape or a jungle gym shape and installed on the anaerobic tank 1.
[0017]
The metal may be porous or non-porous. If it is made porous, the amount of microorganisms supported increases and the deodorizing effect is improved.
[0018]
In FIG. 1B, a breathable support 3 made of a net, a mesh, a perforated plate such as a punching plate, a lattice or the like is provided substantially horizontally above the water level WL in the anaerobic tank 1, and this support Contact material 4 is loaded on 3. The contact material 4 is preferably made of a metal such as iron, aluminum or magnesium. The contact material 4 is preferably in the form of a lump, granule, bar, plate, wire, string, ribbon or the like. The contact material 4 may be porous or non-porous.
[0019]
In FIG. 1B, the support 3 is arranged above the water level WL, but in FIG. 1C, the support 3 is slightly lower than the water level WL, and the contact material on the support 3 is placed. The lower part of the loading layer 4 is soaked in water. Thereby, moisture spreads over the entire contact material 4, the surface of the contact material 4 becomes sufficiently wet, and microorganisms are easy to propagate.
[0020]
In any of FIGS. 1A to 1C, the sulfur compound-containing odor gas component generated from water comes into contact with the contact material 2 or 4, and is oxidized and decomposed by microorganisms on the surface of the contact material 2 or 4. Deodorized. The sulfuric acid produced by the oxidative decomposition reacts with the metal to form a sulfate, and the water containing the sulfate is dropped into water in the anaerobic tank 1 and is transferred to the water after being dropped. Thereby, a sulfate and the phosphate ion in water react, and a hardly soluble phosphate produces | generates. This hardly soluble phosphate settles in the anaerobic tank 1. In this way, the deodorization process and the phosphate ion removal process are performed. Moreover, when the tank is made of concrete, the concrete is prevented from being eroded by sulfuric acid. In the case of FIGS. 1B and 1C, the contact material can be replenished from above when it is consumed.
[0021]
The above embodiment is an example of the present invention, and the present invention may take forms other than those shown in the drawings. For example, also in FIG. 1A, the lower part of the contact material 2 may be immersed in water. Moreover, in FIG.1 (c), the support body 3 may be inclined, for example, only the left half side of the support body 3 may be immersed in water, and the right half side may be located above a water surface. Instead of tilting the support 3, a bottomed cylindrical downward extension may be provided on a part of the support 3, and the lower part of the downward extension may be immersed in water.
[0022]
【The invention's effect】
As described above, according to the present invention, it is possible to deodorize the anaerobic tank and prevent phosphate ions from flowing out.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view of an anaerobic tank according to an embodiment.
[Explanation of symbols]
1 Anaerobic treatment layer 2, 4 Contact material 3 Support

Claims (5)

槽内の水面よりも上位に接触材が配置され、該接触材表面における微生物の作用によって硫黄化合物を酸化して脱臭するようにした嫌気槽において、
該接触材は、硫酸に可溶であると共に、硫酸塩としてリン酸イオンと接触したときに難溶性リン酸塩を生成させる金属又はその化合物を含むことを特徴とする嫌気槽。
In the anaerobic tank in which the contact material is arranged above the water surface in the tank, and the sulfur compound is oxidized and deodorized by the action of microorganisms on the surface of the contact material.
The anaerobic tank, wherein the contact material is soluble in sulfuric acid and contains a metal or a compound thereof that forms a sparingly soluble phosphate when it comes into contact with a phosphate ion as a sulfate.
請求項1において、該金属は、鉄、アルミニウム及びマグネシウムの少なくとも1種であることを特徴とする嫌気槽。2. The anaerobic tank according to claim 1, wherein the metal is at least one of iron, aluminum, and magnesium. 請求項1又は2において、該接触材は多孔状であることを特徴とする嫌気槽。The anaerobic tank according to claim 1, wherein the contact material is porous. 請求項1ないし3のいずれか1項において、槽内に接触材の支持体が設置されており、
該支持体の上側に接触材が積載されていることを特徴とする嫌気槽。
In any one of Claims 1 thru | or 3, the support body of the contact material is installed in the tank,
An anaerobic tank, wherein a contact material is loaded on the upper side of the support.
請求項1ないし4のいずれか1項において、接触材の一部が槽内の水に接していることを特徴とする嫌気槽。The anaerobic tank according to any one of claims 1 to 4, wherein a part of the contact material is in contact with water in the tank.
JP2003172212A 2003-06-17 2003-06-17 Anaerobic tank Pending JP2005007241A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009299048A (en) * 2008-05-13 2009-12-24 Nippon Sharyo Seizo Kaisha Ltd Method and apparatus for desulfurizing fuel gas
US8202817B2 (en) 2007-01-31 2012-06-19 Nec Corporation Nanocarbon aggregate and method for manufacturing the same
JP2013001883A (en) * 2011-06-21 2013-01-07 Takaaki Nosaka Method and apparatus for reducing hydrogen sulfide in methane fermentation biomass gas

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8202817B2 (en) 2007-01-31 2012-06-19 Nec Corporation Nanocarbon aggregate and method for manufacturing the same
JP5287256B2 (en) * 2007-01-31 2013-09-11 日本電気株式会社 Nanocarbon aggregate and method for producing the same
JP2009299048A (en) * 2008-05-13 2009-12-24 Nippon Sharyo Seizo Kaisha Ltd Method and apparatus for desulfurizing fuel gas
JP2013001883A (en) * 2011-06-21 2013-01-07 Takaaki Nosaka Method and apparatus for reducing hydrogen sulfide in methane fermentation biomass gas

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