JPS63294995A - Method for preventing emission of offensive odor from drainage tank of the like or building - Google Patents
Method for preventing emission of offensive odor from drainage tank of the like or buildingInfo
- Publication number
- JPS63294995A JPS63294995A JP62133186A JP13318687A JPS63294995A JP S63294995 A JPS63294995 A JP S63294995A JP 62133186 A JP62133186 A JP 62133186A JP 13318687 A JP13318687 A JP 13318687A JP S63294995 A JPS63294995 A JP S63294995A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- drainage tank
- aeration
- building
- orp
- 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
- 238000000034 method Methods 0.000 title claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 4
- 239000001301 oxygen Substances 0.000 claims abstract description 4
- 230000033116 oxidation-reduction process Effects 0.000 claims abstract 2
- 238000005273 aeration Methods 0.000 claims description 31
- 235000019645 odor Nutrition 0.000 claims description 14
- 239000010865 sewage Substances 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000005276 aerator Methods 0.000 abstract 3
- 238000000354 decomposition reaction Methods 0.000 abstract 2
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 description 16
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 11
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 11
- 238000003756 stirring Methods 0.000 description 10
- 238000007664 blowing Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000010797 grey water Substances 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical compound CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Activated Sludge Processes (AREA)
- Sewage (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ビル用排水槽やポンプ場のポンプ井等におけ
る汚水からの悪臭発生を防止する方法に間する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for preventing the generation of bad odors from wastewater in building drainage tanks, pumping wells of pumping stations, and the like.
ビル内で発生する種々の雑排水や、し尿は通常自然流下
によって一旦地下に設けられた排水槽に集められ、排水
ポンプにより公共下水道の排水施設に排水される。しか
しこのビル用排水槽は単なる水槽が設けられているにす
ぎず、しかも汚水の流入及び排水が不定期であるため、
排水槽内の汚水が嫌気腐敗し、悪臭を発生することが多
かった。このためフロアを設けて曝気を行い、排水の嫌
気腐敗を防止する方法が試みられているが、ブロアの選
定方法や運転方法が適切でないため、十分な悪臭防止効
果が得られなかったり、効果が得られても電力費がかか
るなど問題があった。Various kinds of gray water and human waste generated within a building are usually collected by gravity in a drainage tank installed underground, and then drained to a public sewerage facility by a drainage pump. However, this building drainage tank is just a water tank, and the inflow and drainage of sewage is irregular.
The sewage in the drainage tank often rotted anaerobically, producing a foul odor. For this reason, attempts have been made to install a floor to aerate and prevent anaerobic spoilage of wastewater, but due to inappropriate blower selection and operation methods, sufficient odor prevention effects may not be obtained or the effects may not be as effective. Even if they were obtained, there were problems such as high electricity costs.
本発明は、排水槽内に空気を供給するとともに槽内を混
合攪拌するために設けた曝気装置を設置する場合の適切
な曝気装置の選定方法及び運転方法を提供することによ
って、効率的に悪臭の発生を防止することを目的とする
。The present invention provides a method for selecting and operating an appropriate aeration device when installing an aeration device for supplying air into a drainage tank and mixing and agitating the inside of the tank, thereby effectively eliminating bad odor. The purpose is to prevent the occurrence of
ビル用排水槽等に空気を供給するとともに槽内を混合攪
拌するための曝気装置を設置するに際して、槽内の溶存
酸素及び酸化還元電位を指標として、Ｄ Ｏ≧０．８Ｉ
１ｇ／ ｔ 、ＯＲＰ ≧−１００１１Ｖ（７）少なく
とも一方を常に満足するように曝気装置を選定するとと
もに、連続または間欠運転を行うことによ、す、排水槽
の汚水が腐敗し、悪臭が発生するのを未然に防ぐように
なす。When installing an aeration device to supply air to a building drainage tank, etc. and to mix and stir the inside of the tank, D O≧0.8I is determined using the dissolved oxygen and redox potential in the tank as indicators.
1g/t, ORP ≧-10011V (7) By selecting an aeration device that always satisfies at least one of the conditions and operating it continuously or intermittently, the sewage in the drainage tank will rot and produce a bad odor. Take steps to prevent this from happening.
次に、本発明を実施例に基づいて説明する。 Next, the present invention will be explained based on examples.
第１図において、１はビルの地階部分に所要容積を有す
るように設けた雑排水槽で、この雑排水槽１の槽底２の
所望位置に曝気装置３を設置する。第２図は、この曝気
装置の詳細説明図で、水中モータ４と、攪拌羽根５と、
ドラフトチューブ６と空気吹込管７よりなる。水中モー
タ４は槽底に固定されるとともに、この水中モータ４に
上端６ａがラッパ状に拡関し、下部６ｂが槽底に沿うよ
うにＬ字形に屈曲したドラフトチューブ６を一体に設け
、このドラフトチューブ内に前記モータにて駆動される
攪拌羽根５を設ける。このドラフトチューブ６にはほぼ
回転中心に、しかも攪拌羽根先端の内径内に空気吹込ロ
アａを挿入するようにして空気吹込管７が設けられる。In FIG. 1, reference numeral 1 denotes a gray water tank having a required volume installed in the basement of a building, and an aeration device 3 is installed at a desired position on the tank bottom 2 of this gray water tank 1. FIG. 2 is a detailed explanatory diagram of this aeration device, showing the submersible motor 4, stirring blade 5,
It consists of a draft tube 6 and an air blowing pipe 7. The submersible motor 4 is fixed to the tank bottom, and is integrally provided with a draft tube 6 whose upper end 6a extends in a trumpet shape and whose lower part 6b is bent in an L-shape along the tank bottom. A stirring blade 5 driven by the motor is provided inside the tube. An air blowing pipe 7 is provided in the draft tube 6 so that the air blowing lower a is inserted approximately at the center of rotation and within the inner diameter of the tip of the stirring blade.
この空気吹込管７の上端は水位が変動しても常に大気中
に間口するようにして、しかも所要の空気量が汚水中に
吹き込まれるようにした径を有するパイプである。The upper end of the air blowing pipe 7 is a pipe having a diameter such that it always opens into the atmosphere even when the water level fluctuates, and also allows the required amount of air to be blown into the waste water.
以上の如く構成した装置において、水中モータ４を駆動
すると攪拌羽根５が回転し、槽内の汚水を攪拌する。ま
たこれによりこの羽根の先端部分の汚水中に負圧が発生
し、空気吹込管７から大気中の空気が吸引され、空気吹
込ロアａから汚水中に吹き込まれて、ドラフトチューブ
内の汚水と混合され、ドラフトチューブ前方向へと押し
出される。In the apparatus configured as described above, when the submersible motor 4 is driven, the stirring blades 5 rotate to stir the wastewater in the tank. This also generates negative pressure in the waste water at the tip of this blade, and atmospheric air is sucked through the air blowing pipe 7, blown into the waste water from the air blowing lower a, and mixed with the waste water in the draft tube. and is pushed out toward the front of the draft tube.
水面に浮遊しているスカムは、攪拌羽根５の駆動にて、
ドラフトチューブ内へ流入される汚水とともに、該チュ
ーブ内へ流入され、前記攪拌羽根によって破砕される。The scum floating on the water surface is removed by the stirring blade 5.
The waste water flows into the draft tube together with the waste water, and is crushed by the stirring blade.
このように、本実施例に示した曝気装置は排水槽内の攪
拌と曝気に加えて、浮遊スカムの破砕も同時に行うこと
ができるが、スカム破砕が不可能な曝気装置であっても
よい、ただしスカムも悪臭発生源のｌｒつであるため、
スカム破砕の機能を有する曝気 冒装置を採用するか、
スカム破砕用の攪拌機を別 １に設けることが望ましい
。 １一方、第１図に示した排水ポ
ンプ９はレベル 冒スイッチ１０と連動させて０Ｎ−Ｏ
ＦＦ運転を行い、 １水位が常に高水位ＨＷＬと低水位
ＬＷＬの間になるようにする。この時のＨＷＬとＬＷＬ
は、トラフドブチューブの吸込口６ａの上端から水面ま
での距離が１００〜２００ｎｗ程度となるように設定す
れば、効率的に水面上の浮遊スカムを吸い込むことがで
きる。In this way, the aeration device shown in this example is capable of simultaneously crushing floating scum in addition to stirring and aeration in the drainage tank, but it may also be an aeration device that cannot crush scum. However, since scum is also a source of odor,
Adopt an aeration device with scum crushing function, or
It is desirable to provide a separate stirrer for crushing scum. 1. On the other hand, the drain pump 9 shown in FIG.
Perform FF operation so that the 1st water level is always between the high water level HWL and the low water level LWL. HWL and LWL at this time
If the distance from the upper end of the suction port 6a of the trough tube tube to the water surface is set to be about 100 to 200 nw, floating scum on the water surface can be efficiently sucked in.
次に約１０１のビル用雑排水槽に２６０ｔ／分の能力を
持つ曝気装置を設置して連続運転を行い、第１図に示し
た空気吹込管７に設けたパルプ８により、空気量を調整
した時の、槽内のＤＯ値、０ＲＰ（ＩＩ及び槽内空気中
及びＨ２Ｓ （硫化水素）１度の測定値を次表に示す。Next, an aeration system with a capacity of 260 t/min was installed in approximately 101 building gray water tanks and operated continuously, and the amount of air was adjusted using the pulp 8 installed in the air blowing pipe 7 shown in Figure 1. The following table shows the DO value in the tank, 0RP (II) and the measured values of H2S (hydrogen sulfide) in the air in the tank and 1 degree.
前記表より、曝気強度すなわち汚水ｌｌ１１３当りの曝
気量が大きい程、Ｄｏ値、ＯＲＰ ＩＩＩＩが高く、発
生するＨ２Ｓの量も少ないことがわかる。汚水中に生成
し、空気中へと揮散する悪臭成分はＨ２Ｓ以外に、メチ
ルメルカプタンや、アンモニア、硫化メチル、２硫化メ
チルなどが少量存在するが、嫌気腐敗によって生成する
悪臭の大靜分はＨ２Ｓであるため、悪臭の防止効果はＨ
２Ｓ発生量によって評価することができる。東京都の指
導要綱によると、 Ｈ２Ｓの許容濃度は公共ます内空気
中で１０ｐｐｍ 、汚水中で２ ｍｇ ／ ｔとされて
おり、第１表では条件陽３がこれに対応する境界条件と
考えられる。 曝気強度、すなわち汚水１信３当りの曝
気量は汚水の性状によって効果が異なり、絶対的な指標
とはならないことから、汚水の性状に対応して変化する
Ｄｏ値、またはＯＲＰ値を指標として曝気量を制御する
方法が有効である。すなわち条件Ｎａ３よりり。From the above table, it can be seen that the larger the aeration intensity, that is, the amount of aeration per 113 sewage, the higher the Do value and ORP III, and the smaller the amount of H2S generated. In addition to H2S, the malodorous components that are generated in wastewater and volatilized into the air include small amounts of methyl mercaptan, ammonia, methyl sulfide, and methyl disulfide, but the majority of the malodor produced by anaerobic decay is H2S. Therefore, the odor prevention effect is H
It can be evaluated based on the amount of 2S generated. According to the guidelines of the Tokyo Metropolitan Government, the permissible concentration of H2S is 10 ppm in the air in public spaces and 2 mg/t in sewage, and in Table 1, condition 3 is considered to be the corresponding boundary condition. . The aeration intensity, that is, the amount of aeration per 1 sewage of sewage, has different effects depending on the properties of the sewage and cannot be used as an absolute indicator. A method of controlling the amount is effective. That is, from condition Na3.
≧０．８ｍｇ／ｌ、またはＯＲＰ≧−１０ｈＶの少なく
とも一方を指標として曝気量を制御すれば、発生するＨ
２Ｓ を排水槽内空気中で１０ｐｐｎ＋以下、汚水中
で２ ｍｇ ／ を以下を満足することができる。If the aeration amount is controlled using at least one of ≧0.8 mg/l or ORP≧-10 hV as an indicator, the generated H
It is possible to satisfy 10 ppn+ or less of 2S in the air in the drainage tank, and 2 mg/less of 2S in the wastewater.
排水槽における）（２Ｓ発生のメカニズムは、汚水中に
存在する硫酸イオンや、イオウ分を含有するタンパク質
などの有機物が、硫酸還元菌などの微生物の作用によっ
てＨ２Ｓ に還元され、汚水中に生成したＨ２Ｓ
が空気中へと揮散するもので、上述のように曝気を行う
ことは、汚水を好気状態にすることによって、硫酸還元
菌等嫌気性微生物の活性を抑えることを意味する。The mechanism of 2S generation (in drainage tanks) is that organic matter such as sulfate ions and sulfur-containing proteins present in wastewater are reduced to H2S by the action of microorganisms such as sulfate-reducing bacteria, and H2S is generated in wastewater. H2S
is volatilized into the air, and performing aeration as described above means suppressing the activity of anaerobic microorganisms such as sulfate-reducing bacteria by bringing wastewater into an aerobic state.
また、曝気を行うことによって槽底に沈澱していた汚泥
分が巻き上げられて、混合攪拌され、排水ポンプ作動時
に槽外に排出されることも、悪臭発生の防止効果を助長
する。一般に硫酸還元菌の至！ＯＲＰ値は一２００ｍＶ
付近にあるといわれているが、 第１表においてＯＲＰ
値が−２２０〜−１８０ｍＶであった条件Ｎ１ｔｌにお
いて、Ｈ２Ｓ 発生量が最も多く １００ｍＶ以上に
なるとＨ２Ｓ の発生が急激に減少するという結果と
一致している。In addition, by performing aeration, the sludge that has settled at the bottom of the tank is rolled up, mixed and agitated, and discharged outside the tank when the drainage pump is operated, which also helps prevent the occurrence of bad odors. In general, sulfate-reducing bacteria are the best! ORP value is -200mV
It is said to be located nearby, but in Table 1, ORP
This is consistent with the result that under the condition N1tl, where the value was -220 to -180 mV, the amount of H2S generated was the highest, and when the value exceeded 100 mV, the amount of H2S generated decreased rapidly.
次に本発明を実施する場合、前述したように空気吹込管
のバルブ開度を調整する方法もあるが、省エネの観点か
らＤｏ値、またはＯＲＰ値を指標として曝気装置を間欠
運転する方が望ましい。 あるいは、Ｄｏ≧０．８ ＃
ｇ／ ｔ 、またはＯＲＰ≧−１００ｍＶを満たす範囲
で、できるだけ小容量の曝気装置を選定し、連続運転を
行っても省エネとなる。過剰な曝気能力を持つ曝気装置
を設置し、連続運転することは、悪臭発生防止効果の面
からは支障にはならないが必要以上の曝気を行っても悪
臭防止効果は大差がなく、消費電力が大きくなる上、発
泡の原因ともなるため望ましくない。前記第１表の結果
を考慮すれば曝気量として、汚水中のＤｏを３１Ｉ１ｇ
／を程度、ＯＲＰを＋５０ ｍＶ程度に保つことができ
るよう制御すれば、悪臭防止効果も十分で、省エネ効果
の点からも最も好ましいと考えられる。Next, when implementing the present invention, there is a method of adjusting the valve opening of the air blowing pipe as described above, but from the viewpoint of energy saving, it is preferable to operate the aeration device intermittently using the Do value or ORP value as an indicator. . Or Do≧0.8 #
g/t or ORP≧-100mV, energy can be saved by selecting an aeration device with the smallest possible capacity and operating it continuously. Installing an aeration device with excessive aeration capacity and operating it continuously will not hinder the effectiveness of preventing bad odors, but even if aeration is performed more than necessary, there will be no significant difference in the effectiveness of preventing bad odors, and power consumption will be reduced. This is not desirable because it becomes large and causes foaming. Considering the results in Table 1 above, the amount of aeration is 31I1g of Do in wastewater.
It is thought that if the control is carried out so that ORP can be maintained at about +50 mV, the odor prevention effect will be sufficient and it will be most preferable from the point of view of energy saving effect.
本発明によれば、ビル用排水槽等に槽内のＤｏ値または
ＯＲＰ値を指標として、Ｄｏ≧０．８１１Ｉｇ／ ｔ
、またはＯＲＰ ≧−１０（１ｍＶの少なくとも一方を
常に満足するように、曝気装置を選定して設賞し連続運
転を行うか、または設置した曝気量Ｇｔ’ｉ： Ｄ Ｏ
≧０．８ ｍｇ／ ｔ、またはＯＲＰ≧−１００ｍＶの
少なくとも一方を常に満足するように空気量制御運転ま
たは間欠曝気運転を行うことにより、排水槽内の汚水が
腐敗して悪臭が発生するのを効果的に防止できる。According to the present invention, Do≧0.811Ig/t is set in a building drainage tank, etc., using the Do value or ORP value in the tank as an index.
, ORP ≧ -10 (1 mV) Select and set the aeration device and operate it continuously, or set the installed aeration amount Gt'i: D O
By performing air flow control operation or intermittent aeration operation to always satisfy at least one of ≧0.8 mg/t or ORP≧-100 mV, it is possible to prevent the wastewater in the drainage tank from rotting and producing a bad odor. Can be effectively prevented.
第１図はビル等の地階部分に設けた雑排水槽、第２図は
曝気Ｈ置の詳細説明図である。ｌは雑排水槽、２は槽底
、３は曝気装置、４は水中モータ、５は攪拌羽根、６は
ドラフトチューブ、７は空気吹込管。Fig. 1 shows a gray water tank installed in the basement of a building, etc., and Fig. 2 is a detailed explanatory diagram of an aeration station. 1 is a gray water tank, 2 is a tank bottom, 3 is an aeration device, 4 is a submersible motor, 5 is a stirring blade, 6 is a draft tube, and 7 is an air blowing pipe.
Claims (1)
置して汚水から発生する悪臭を防止する方法において、
槽内の溶存酸素（ＤＯ）または酸化還元電位（ＯＲＰ）
を指標として、ＤＯ≧０．８ｍｇ／ι、またはＯＲＰ≧
−１００ｍＶの少なくとも一方を常に満足するように曝
気装置の選定と運転を行うことを特徴とするビル用排水
槽等における悪臭防止方法。In a method of preventing bad odors from sewage by installing aeration equipment in building drainage tanks, pump wells, etc. of pumping stations,
Dissolved oxygen (DO) or oxidation-reduction potential (ORP) in the tank
DO≧0.8mg/ι, or ORP≧ using as an indicator
A method for preventing bad odors in a building drainage tank, etc., characterized by selecting and operating an aeration device so as to always satisfy at least one of -100 mV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133186A JPS63294995A (en) | 1987-05-27 | 1987-05-27 | Method for preventing emission of offensive odor from drainage tank of the like or building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133186A JPS63294995A (en) | 1987-05-27 | 1987-05-27 | Method for preventing emission of offensive odor from drainage tank of the like or building |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63294995A true JPS63294995A (en) | 1988-12-01 |
Family
ID=15098705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62133186A Pending JPS63294995A (en) | 1987-05-27 | 1987-05-27 | Method for preventing emission of offensive odor from drainage tank of the like or building |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63294995A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5196111A (en) * | 1990-09-25 | 1993-03-23 | Degremont | Reactor for the biological treatment of sewage |
| JP2001524876A (en) * | 1997-05-12 | 2001-12-04 | ディーシーヴィー インコーポレイテッド | Methods for reducing hydrogen sulfide levels in wastewater systems. |
| JP2007319787A (en) * | 2006-06-01 | 2007-12-13 | Asahi Organic Chem Ind Co Ltd | Method and apparatus for treating insoluble substance-containing waste water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59130600A (en) * | 1982-10-07 | 1984-07-27 | ザ・ビ−オ−シ−・グル−プ・ピ−エルシ− | Method and apparatus for treatng sewage sludge |
| JPS6087835A (en) * | 1983-10-19 | 1985-05-17 | Atsuhiro Honda | Process and apparatus for desulfurization of methane fermentation gas using activated sludge |
| JPS61120697A (en) * | 1984-11-16 | 1986-06-07 | Hitachi Kiden Kogyo Ltd | Method for preventing spoilage and performing deodorizing in drain tank or storage tank for building |
-
1987
- 1987-05-27 JP JP62133186A patent/JPS63294995A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59130600A (en) * | 1982-10-07 | 1984-07-27 | ザ・ビ−オ−シ−・グル−プ・ピ−エルシ− | Method and apparatus for treatng sewage sludge |
| JPS6087835A (en) * | 1983-10-19 | 1985-05-17 | Atsuhiro Honda | Process and apparatus for desulfurization of methane fermentation gas using activated sludge |
| JPS61120697A (en) * | 1984-11-16 | 1986-06-07 | Hitachi Kiden Kogyo Ltd | Method for preventing spoilage and performing deodorizing in drain tank or storage tank for building |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5196111A (en) * | 1990-09-25 | 1993-03-23 | Degremont | Reactor for the biological treatment of sewage |
| JP2001524876A (en) * | 1997-05-12 | 2001-12-04 | ディーシーヴィー インコーポレイテッド | Methods for reducing hydrogen sulfide levels in wastewater systems. |
| JP2007319787A (en) * | 2006-06-01 | 2007-12-13 | Asahi Organic Chem Ind Co Ltd | Method and apparatus for treating insoluble substance-containing waste water |
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