JPS63294993A - Method for operating malodor preventive device for waste water tank for building or the like - Google Patents
Method for operating malodor preventive device for waste water tank for building or the likeInfo
- Publication number
- JPS63294993A JPS63294993A JP62133184A JP13318487A JPS63294993A JP S63294993 A JPS63294993 A JP S63294993A JP 62133184 A JP62133184 A JP 62133184A JP 13318487 A JP13318487 A JP 13318487A JP S63294993 A JPS63294993 A JP S63294993A
- Authority
- JP
- Japan
- Prior art keywords
- aeration
- dissolved oxygen
- waste water
- water tank
- tank
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 7
- 230000003449 preventive effect Effects 0.000 title 1
- 238000005273 aeration Methods 0.000 claims abstract description 38
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 230000007423 decrease Effects 0.000 claims abstract description 4
- 235000019645 odor Nutrition 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 2
- 230000033116 oxidation-reduction process Effects 0.000 abstract description 7
- 239000010865 sewage Substances 0.000 abstract 3
- 238000006213 oxygenation reaction Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000007664 blowing Methods 0.000 description 9
- 238000003756 stirring Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000010797 grey water Substances 0.000 description 4
- 238000007667 floating Methods 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000011017 operating method Methods 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
- Sewage (AREA)
- Activated Sludge Processes (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悪臭防
止を目的とし設置してた曝気装置の好適な運転方法に間
するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to a preferred method of operating an aeration device installed in a building drainage tank or a pump well at a pumping station for the purpose of preventing bad odors. be.
ビル内で発生する種々の排水や、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
従来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、滞留している汚水が嫌気腐敗して、悪臭が発生す
る問題が生じることが多かった。このため、ブロアを設
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、曝気装置の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の問題があった。Various types of waste 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, conventional drainage tanks for buildings are simply equipped with a water tank, and the stagnant wastewater often undergoes anaerobic decomposition and generates a bad odor. For this reason, attempts have been made to install a blower to aerate and prevent anaerobic spoilage of the wastewater, but the method of operating the aeration equipment is not appropriate.
There were problems such as not being able to obtain a sufficient odor prevention effect, and even if the effect was obtained, the electricity cost was high.
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の適切な運転方法を提供
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。An object of the present invention is to efficiently prevent the occurrence of bad odors by providing an appropriate operating method for an aeration device provided for supplying air into a drainage tank and mixing and agitating the inside of the tank.
ビル用排水槽内の溶存酸素または酸化還元電位を検出す
る装置の少なくとも一方と曝気装置を連動し、溶存酸素
または酸化還元電位がほぼ一定となるように曝気空気量
を制御することにより、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。By linking at least one of the devices for detecting dissolved oxygen or redox potential in a building drainage tank with an aeration device, and controlling the amount of aeration air so that the dissolved oxygen or redox potential is approximately constant, To prevent wastewater from decomposing and causing bad odors.
以下本発明の一実施例を図により説明する。 An embodiment of the present invention will be described below with reference to the drawings.
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がラッパ状に拡開し、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 bottom of the tank, and is integrally provided with a draft tube 6 whose upper end 6a is expanded in a trumpet shape and whose lower part 6b is bent in an L-shape along the bottom of the tank. A stirring blade 5 driven by the motor is provided inside the draft 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
に開口するようにして、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バイブである。The upper end of the air blowing pipe 7 is a vibrator having a diameter such that it is always open to the atmosphere even when the water level fluctuates, and a required amount of air is 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１つであるため、ス
カム破砕の機能を有する曝気装置を採用するか、スカム
破砕用の攪拌機を別に設けることが望ましい。As described above, the aeration apparatus shown in this embodiment can not only agitate and aerate the inside of the drainage tank but also crush floating scum at the same time, but it may be an aeration apparatus that cannot crush scum. However, since scum is also one of the sources of bad odor, it is desirable to employ an aeration device with a scum crushing function or to provide a separate stirrer for scum crushing.
一方、第１図に示した排水ポンプ９はレベルスイッチ１
０と連動させて０Ｎ−ＯＦＦ運転を行い、水位が常に高
水位ＨＷＬと低水位ＬＷＬＯ閏になるようにする。この
時のＨＷＬとＬＷＬは、トラフドブチューブの吸込口６
ａの上端から水面までの距離がｌＯＯ〜２００ ｍｍ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。On the other hand, the drain pump 9 shown in FIG.
0N-OFF operation is performed in conjunction with 0, so that the water level is always in the range of high water level HWL and low water level LWLO. At this time, HWL and LWL are the suction port 6 of the trough tube.
If the distance from the upper end of a to the water surface is set to about 100 to 200 mm, floating scum on the water surface can be efficiently sucked in.
以上の機能を有する曝気Ｈ置を溶存酸素（Ｄｏ）、また
は酸化還元電位（ＯＲＰ）の検出器１１と連動運転させ
る。すなわち、検出器１１からの測定値は演算機能を有
する制御盤１２に入力され、設定値と測定値を比較判定
される。The aeration station having the above functions is operated in conjunction with the dissolved oxygen (Do) or oxidation-reduction potential (ORP) detector 11. That is, the measured value from the detector 11 is input to the control panel 12 having an arithmetic function, and the set value and the measured value are compared and determined.
ｃ４気装置の曝気量を調整するための回転数制御装置１
３は制御盤１２からの信号により、曝気用水中モータ４
の回転数が制御される。制御の指標となる溶存酸素また
は酸化還元電位の設定値は溶存酸素の場合３ ｍｇ ／
を前後、酸化還元電位の場合は＋５（１ｗＶ前後が適
切である。たとえば、溶存酸素が一定になるように制御
する場合は、溶存酸素が４ 噌ｇ ／ １になれば水中
モータの回転数を１／２に低下させて曝気量を減少させ
、それに従って溶存酸素が低下して３ ｍｇ ／ ｔに
なれば、再び回転数を元に戻して曝気量を増加させ、こ
れを繰り返し行うことによってＩ１ｍ気空気量を制御す
る。回転数制御の段階は２段階とするのが最も簡単であ
るが、溶存酸素または酸化還元電位が増加するにつれて
数段階に回転数を低下させる方法であってもよい。ただ
し、その場合は溶存酸素または酸化還元電位の下限値が
溶存酸素の場合０．５ ｍｇ ／ Ｌ維持用、酸化還元
電位の場合−１００ｍＶ以上となるように設定しなけれ
ば悪臭防止の効果がない。これは曝気量が少なすぎて、
槽内が還元状態になると汚水中に存在する硫酸還元菌等
の嫌気性微生物の活動が活発になり、硫酸イオン等が分
解されて悪臭成分の大部分を占める硫化水素が生成する
ためである。Rotation speed control device 1 for adjusting the aeration amount of the c4 air device
3 is a submersible motor 4 for aeration based on a signal from the control panel 12.
The rotation speed is controlled. The set value of dissolved oxygen or redox potential, which is an indicator for control, is 3 mg /
For redox potential, +5 (around 1wV) is appropriate. For example, if you want to control the dissolved oxygen to be constant, the rotation speed of the underwater motor should be adjusted when the dissolved oxygen reaches 4 g/1. The amount of aeration is reduced by 1/2, and when the dissolved oxygen decreases to 3 mg/t, the rotation speed is returned to the original value and the amount of aeration is increased. By repeating this process, I1m is reduced. It is simplest to control the rotational speed in two stages, but it is also possible to reduce the rotational speed in several stages as dissolved oxygen or redox potential increases. However, in that case, the lower limit value of dissolved oxygen or redox potential must be set to maintain 0.5 mg/L for dissolved oxygen, or -100 mV or more for redox potential, or there will be no odor prevention effect. .This is because the amount of aeration is too small.
This is because when the inside of the tank becomes reduced, the activity of anaerobic microorganisms such as sulfate-reducing bacteria present in the wastewater becomes active, decomposing sulfate ions, etc., and producing hydrogen sulfide, which makes up most of the malodorous components.
前記構成の曝気装置を約ｌ０ＩＩ＋３のビル用排水槽に
設置し、ＤＯ値が３〜３ 、５ＩＩＩｇ／ Ｌとなるよ
うに曝気空気量を制御しながら、溶存酸素制御運転を行
ったところ槽内空気中の硫化水素は設置前に５ｐｐｍ以
上あったのに対し、本運転期間中は常時０．０１ｐｐｍ
以下の低濃度に保つことができた。The aeration system with the above configuration was installed in a building drainage tank of about 10 II + 3, and dissolved oxygen control operation was performed while controlling the amount of aeration air so that the DO value was 3 to 3.5 III g/L. The hydrogen sulfide inside was more than 5ppm before installation, but it was always 0.01ppm during the actual operation period.
We were able to maintain the concentration at a low level below.
第３図は、本発明の別の実施例を示したもので、空気吹
込管７に設けた電動弁１４の開度を調整することにより
、曝気空気量を制御する方法により、悪臭の発生を防止
する。電動弁１４の開度は第１図の場合と同様に、溶存
酸素または酸化還元電位の検出器１１の測定値を演算機
能を有する制御盤１２に人力して、予め人力した設定値
と比較判定させ、測定値が上限設定値になれば電動弁の
開度な小さくして曝気量を減少させ、それに伴って測定
値が低下して、下限設定値になれば再び電動弁を全開す
るという動作を繰り返す、溶存酸素または酸化還元電位
の設定値は前記実施例と同程度とする。FIG. 3 shows another embodiment of the present invention, in which the amount of aeration air is controlled by adjusting the opening degree of the electric valve 14 provided in the air blowing pipe 7, thereby preventing the occurrence of bad odors. To prevent. As in the case of FIG. 1, the opening degree of the electric valve 14 is determined by manually inputting the measured value of the dissolved oxygen or oxidation-reduction potential detector 11 to the control panel 12 having arithmetic functions, and comparing it with a previously manually inputted set value. When the measured value reaches the upper limit set value, the opening of the electric valve is reduced to reduce the aeration amount, and when the measured value decreases accordingly and reaches the lower limit set value, the electric valve is fully opened again. The set values for dissolved oxygen or redox potential are the same as in the previous example.
本発明によれば、ビル用排水槽等に曝気装置と溶存酸素
または酸化還元電位の少なくとも一方を検出する装置を
設け、溶存酸素または酸化還元電位がほぼ一定となるよ
うに、曝気装置の駆動回転数または空気吹込管のパルプ
開度を調整しながら曝気空気量を制御することにより、
排水槽内の汚水が腐敗して悪臭が発生するのを少ない消
費電力で効率的に防止することができる。According to the present invention, an aeration device and a device for detecting at least one of dissolved oxygen and oxidation-reduction potential are provided in a building drainage tank, etc., and the driving rotation of the aeration device is adjusted so that the dissolved oxygen or the oxidation-reduction potential is approximately constant. By controlling the amount of aeration air while adjusting the number or pulp opening of the air blowing pipe,
To efficiently prevent wastewater in a drainage tank from decomposing and producing a bad odor with less power consumption.
第１図は本発明曝気装置を備えた地下に設置される雑排
水槽の縦断面図、第２図は曝気装置の詳細説明図、第３
図は異なりたる実施例図である。
１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、９は排水ポンプ、１０はレベルスイッチ、１１は
検出器、１２は制御盤、１３は回転数制御ｉ置。
第３図Figure 1 is a vertical cross-sectional view of a gray water tank installed underground equipped with the aeration system of the present invention, Figure 2 is a detailed explanatory diagram of the aeration system, and Figure 3 is a detailed illustration of the aeration system.
The figure shows different embodiments. 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, 7 is an air blowing pipe, 9 is a drainage pump, 10 is a level switch, 11 is a detection 12 is a control panel, 13 is a rotation speed control unit. Figure 3
Claims (3)
を設けたビル用排水槽や、ポンプ場 のポンプ井等において、槽内の溶存酸素ま たは酸化還元電位の少なくとも一方を検出 し、槽内の溶存酸素または酸化還元電位が 所定の値となるように、曝気空気容量を制 御することを特徴とするビル用排水等にお ける悪臭防止装置の運転方法。(1) In order to prevent the generation of bad odors from wastewater, at least one of dissolved oxygen or redox potential in the tank is detected in building drainage tanks equipped with aeration equipment, pump wells at pumping stations, etc. 1. A method for operating an odor prevention device for building wastewater, etc., comprising controlling the aeration air volume so that the dissolved oxygen or redox potential in the water reaches a predetermined value.
増減させることを特徴とする特許請 求の範囲第１項記載のビル用排水槽等にお ける悪臭防止装置の運転方法。(2) The method for operating a malodor prevention device in a building drainage tank or the like as set forth in claim 1, wherein the aeration air amount control means increases or decreases the driving rotation speed of the aeration device.
を調整することを特徴とする特許請 求の範囲第１項記載のビル用排水槽等にお ける悪臭防止装置の運転方法。(3) The method for operating an odor prevention device in a building drainage tank or the like as set forth in claim 1, wherein the aeration air amount control means adjusts the valve opening of the air suction pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133184A JPS63294993A (en) | 1987-05-27 | 1987-05-27 | Method for operating malodor preventive device for waste water tank for building or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133184A JPS63294993A (en) | 1987-05-27 | 1987-05-27 | Method for operating malodor preventive device for waste water tank for building or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63294993A true JPS63294993A (en) | 1988-12-01 |
Family
ID=15098655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62133184A Pending JPS63294993A (en) | 1987-05-27 | 1987-05-27 | Method for operating malodor preventive device for waste water tank for building or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63294993A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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. |
-
1987
- 1987-05-27 JP JP62133184A patent/JPS63294993A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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. |
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