JPH08243309A - Catalytic oxidation device for sedimentation basin - Google Patents
Catalytic oxidation device for sedimentation basinInfo
- Publication number
- JPH08243309A JPH08243309A JP7074649A JP7464995A JPH08243309A JP H08243309 A JPH08243309 A JP H08243309A JP 7074649 A JP7074649 A JP 7074649A JP 7464995 A JP7464995 A JP 7464995A JP H08243309 A JPH08243309 A JP H08243309A
- Authority
- JP
- Japan
- Prior art keywords
- treated water
- outflow
- sedimentation basin
- sedimentation
- overflow weir
- 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
- 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
- Biological Treatment Of Waste Water (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、下水処理、産業排水
処理等の接触酸化装置の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a catalytic oxidation device for sewage treatment, industrial wastewater treatment and the like.
【０００２】[0002]
【従来の技術】従来、下水等の有機性汚水の活性汚泥法
による処理水は最終沈殿池にて固液分離を行ない、消毒
し放流するのが一般であり、放流水のＳＳ，ＢＯＤ値を
下げるために再処理としてろ過を行うが、沈殿池よりの
流出水を別途に設けたろ過装置でろ過するのが一般であ
る。2. Description of the Related Art Conventionally, treated water obtained by the activated sludge method of organic sewage such as sewage is generally subjected to solid-liquid separation in a final settling tank, sterilized and discharged, and the SS and BOD values of the discharged water are adjusted. Filtration is performed as a retreatment to lower the temperature, but it is common to filter the outflow water from the settling tank with a separately provided filtration device.
【０００３】[0003]
【発明が解決しようとする課題】この発明は、沈殿池の
処理水のＳＳ，ＢＯＤなど水質を向上させる方法とし
て、処理水に残存する溶解性有機物と浮遊性固形物を沈
殿池内において動力を用いることなしに除去するシステ
ムを提供せんとするものである。DISCLOSURE OF THE INVENTION The present invention uses, as a method for improving the quality of SS, BOD, etc., of treated water in a sedimentation tank, the soluble organic matter and floating solid matter remaining in the treated water are powered in the sedimentation tank. It is intended to provide a system for removal without incident.
【０００４】[0004]
【課題を解決するための手段】この発明は、上述の課題
を解決するために、沈殿池の越流堰３の前側に流出阻止
板４を設け、流出阻止板４と沈殿池の内側壁５の間に接
触酸化材６を羅列充填し、処理水を流出阻止板４の下部
を迂回して接触酸化材６の下部より流入させて、内部を
通過させてから越流堰３より流出させるようにしたもの
である。According to the present invention, in order to solve the above-mentioned problems, an outflow prevention plate 4 is provided in front of an overflow weir 3 of a sedimentation tank, and the outflow prevention plate 4 and an inner wall 5 of the sedimentation tank. In order to fill the contact oxidant 6 between them, the treated water bypasses the lower part of the outflow prevention plate 4 to flow in from the lower part of the contact oxidant 6, and after passing through the inside, flow out from the overflow weir 3. It is the one.
【０００５】[0005]
【作用】この発明に係る装置は、上述のように構成され
ており、有機性汚水を活性汚泥法により好気性処理した
処理水を、越流堰から流出する前段階で接触酸化材に接
触させて残存する溶解性有機物，浮遊性固形物を除去す
ることができる。The apparatus according to the present invention is configured as described above, and the treated water obtained by aerobically treating the organic sewage by the activated sludge method is brought into contact with the catalytic oxidant before it flows out from the overflow weir. It is possible to remove the remaining soluble organic substances and floating solid substances.
【０００６】即ち、沈殿池に流入した処理水は滞留時間
３〜５時間と緩やかな流れの中で浮遊固形物を沈降除去
して越流堰の近辺に到達し、流出阻止板４にて流れを阻
止されて下方に迂回して流れ、接触酸化材６の下部より
流入する。処理水は沈殿池において殆どの浮遊固形物を
沈殿除去して僅かの浮遊性固形物，溶解性有機物，溶存
酸素を内存しており、接触酸化材６の下部より上部に流
動しつつ、同時に接触酸化材６の表面に付着している微
生物は溶存酸素により活性化され、溶解性有機物を酸化
分解して、汚泥フロックを肥大化し表面の汚泥密度を増
加させる。That is, the treated water that has flowed into the settling tank reaches the vicinity of the overflow weir by sedimenting and removing suspended solids in a gentle flow with a residence time of 3 to 5 hours, and flows at the outflow prevention plate 4. Of the contact oxidant 6 and flows downward from the contact oxidant 6. Most of the suspended solids of the treated water are removed by sedimentation in the settling tank, and a small amount of suspended solids, soluble organic substances, and dissolved oxygen are contained in the treated water. Microorganisms adhering to the surface of the oxidizer 6 are activated by dissolved oxygen, and oxidatively decompose soluble organic substances to enlarge sludge flocs and increase the sludge density on the surface.
【０００７】更に、浮遊性固形物は汚泥の表面を通過し
つつ汚泥に接触し付着捕捉されて除去され、清澄度を増
した処理水は接触酸化材６の上部に移動し、越流堰３よ
り流出水路に入り系外に移送される。接触酸化材の表面
に付着し生成している微生物と肥大化した汚泥は重量を
増し遂には接触材の表面より剥離して沈下するので、通
常は、汚泥による閉塞により通水抵抗は大きくなること
はない。Further, the floating solid matter passes through the surface of the sludge and comes into contact with the sludge so as to be adhered and trapped and removed, and the treated water having increased clarification moves to the upper part of the contact oxidizing material 6 and the overflow weir 3 It enters the outflow channel and is transferred to the outside of the system. The microorganisms adhering to the surface of the contact oxidizer and the enlarged sludge will increase in weight and will eventually separate from the surface of the contact material and settle, so normally the water resistance will increase due to clogging by the sludge. There is no.
【０００８】然しながら、処理水の汚濁負荷が大きく発
生汚泥量が多くて剥離と沈降が滞り、水路が閉塞して通
水抵抗値が上がり、流出阻止板内の水位Ｈ１が上昇する
場合には、水位（Ｈ３）となり、（図面参照）流出阻止
板４をオーバして、直接越流堰３より流出水路２に流入
するので運転上は支障はない。水位がＨ３となった際
は、流出阻止板４と接触酸化材６の枠７に衝撃を与え、
又は水流に乱れを与えて汚泥の剥離沈降を行ない通水抵
抗値を下げることができる。However, when the pollution load of the treated water is large, the amount of sludge generated is large, separation and sedimentation are delayed, the water channel is blocked, the water resistance increases, and the water level H1 in the outflow prevention plate rises, The water level (H3) is reached, (see the drawing), and the water flows over the outflow prevention plate 4 and directly flows into the outflow water channel 2 from the overflow weir 3, so there is no problem in operation. When the water level becomes H3, a shock is applied to the outflow prevention plate 4 and the frame 7 of the contact oxidizer 6,
Alternatively, it is possible to reduce the water flow resistance value by giving turbulence to the water flow to cause the sludge to separate and settle.
【０００９】[0009]
【実施例】図１は、方形沈殿池の中に接触酸化材を設置
した事例の縦断面図であり、沈殿池１の左右上端部に流
出水路２，越流堰３があり、一般には沈殿池にて固液分
離した処理水は越流堰３の近辺に至り、水位Ｈ１にて流
出水路２に入り水位Ｈ４により系外に流出する。EXAMPLE FIG. 1 is a vertical cross-sectional view of a case in which a catalytic oxidizer is installed in a rectangular settling tank. Outflow water channels 2 and overflow weirs 3 are provided at the left and right upper ends of a settling tank 1, and generally settling is performed. The treated water that has undergone solid-liquid separation in the pond reaches the vicinity of the overflow weir 3, enters the outflow channel 2 at the water level H1, and flows out of the system at the water level H4.
【００１０】この発明においては、越流堰３の前部に流
出阻止板４を設け、この流出阻止板４と内側壁５の間
に、枠７に接触酸化材６を組込んだ接触酸化装置８を設
けている。そして、沈殿池内の処理水は越流堰３に到着
する前で流出阻止板４により進路を下に迂回して、接触
酸化材６の下部より流入し接触酸化材６の中を通過し、
接触酸化材６の表面に付着している微生物に接触したの
ち、越流堰３に至り流出水路２に流入し系外に排出する
ようにしている。According to the present invention, the outflow prevention plate 4 is provided in the front part of the overflow weir 3, and the catalytic oxidation device in which the contact oxidation material 6 is incorporated in the frame 7 between the outflow prevention plate 4 and the inner side wall 5. 8 are provided. Then, the treated water in the sedimentation basin bypasses the path downward by the outflow prevention plate 4 before reaching the overflow weir 3, flows in from the lower part of the contact oxidant 6 and passes through the contact oxidant 6,
After contacting the microorganisms adhering to the surface of the contact oxidant 6, it reaches the overflow weir 3, flows into the outflow water channel 2, and is discharged out of the system.
【００１１】すなわち、固液分離された沈殿池１内の処
理水は、接触酸化材６中を通過する間に、接触酸化材６
の表面に付着している微生物によって、溶解性有機物が
酸化分解除去され、同時に、処理水中の浮遊性固形も接
触酸化材６の表面の肥大した汚泥に付着除去されて系外
に排出されるものである。That is, the treated water in the settling basin 1 which has been subjected to solid-liquid separation is passed through the contact oxidant 6 while the contact oxidant 6 is being passed.
The soluble organic substances are oxidatively decomposed and removed by the microorganisms adhering to the surface of the water, and at the same time, the floating solids in the treated water are also adhering and removed to the enlarged sludge on the surface of the contact oxidizer 6 and discharged out of the system. Is.
【００１２】そして、このような運転を長期間に亘り連
続すると、接触酸化材６に付着した汚泥フロックが大き
くなり重量が増え、又、その付着量が増えると汚泥は接
触酸化材６の表面より剥離し沈降する。また、汚濁負荷
が大きく発生汚泥量が多く、接触酸化材６への汚泥付着
量が増加して隙間を塞ぎ空隙率が小さくなり通水抵抗が
大きくなると、沈殿池１の水位が上昇し流出阻止板４の
水位Ｈ３となり、接触酸化装置８を通らずに直接越流堰
に至り流出水路２に流入し系外に排出される。If such an operation is continued for a long period of time, the sludge flocs adhering to the contact oxidant 6 become large and the weight increases, and if the amount of adhering increases, the sludge is removed from the surface of the contact oxidizer 6. Peel and settle. In addition, when the pollution load is large and the amount of sludge generated is large, the amount of sludge adhered to the contact oxidizer 6 increases, the gap is closed, the porosity becomes small, and the water flow resistance becomes large, the water level in the sedimentation basin 1 rises and outflow prevention It becomes the water level H3 of the plate 4, directly reaches the overflow weir without passing through the catalytic oxidation device 8, flows into the outflow water channel 2, and is discharged out of the system.
【００１３】このような場合には、流出阻止板４又は枠
７に衝撃を与えるか水流に乱れを起こし接触酸化材６の
表面の汚泥を剥離し沈殿させて、通水抵抗を小さくして
沈殿池処理水が接触酸化装置８に入るようにすることに
よって、定常の処理運転状態に回復させることができ
る。下部床面に溜まった汚泥９は汚泥かき寄機１０にて
移送する。このような処理操作は図２に示すような円形
の沈殿池１でも同様である。In such a case, impact is exerted on the outflow prevention plate 4 or the frame 7 or the water flow is disturbed to cause sludge on the surface of the contact oxidizer 6 to be peeled off and settled to reduce water flow resistance and settled. By allowing the treated water in the pond to enter the catalytic oxidation device 8, it is possible to recover the steady treatment operation state. The sludge 9 accumulated on the lower floor is transferred by the sludge scraper 10. Such a processing operation is the same for the circular settling tank 1 as shown in FIG.
【００１４】下水の二次処理水の沈殿池に関する設計指
針等では、越流堰の堰の越流負荷として、堰長１ｍにつ
いて１日当たり１５０ｍ3 、１時間当たり６．２５ｍ3
としている。堰長１ｍにたいし、幅を１ｍとり、深さを
３ｍとると容積は３ｍ3 となり、これに接触酸化材を充
填すると、容量３ｍ3 で滞留時間凡そ２９分の接触酸化
装置が出来る。接触酸化材として合成樹脂繊維製の織布
又は紐を使い、酸化材比表面積を１００ｍ2 ／ｍ3 程度
とすることにより、実験より流入水ＢＯＤ１０ｍｇ／
Ｌ、処理水ＢＯＤ５ｍｇ／Ｌとすると、ＢＯＤ容積負荷
として、０．３ｋｇ／ｍ3 ・日〜０．５ｋｇ／ｍ3 ・日
が許容範囲となり、本実施例の接触酸化装置によりＢＯ
Ｄ値を半分以下とすることができる。According to the design guideline regarding the sedimentation basin of the secondary treated water, the overflow load of the weir of the overflow weir is 150 m3 per day for a weir length of 1 m, and 6.25 m3 per hour.
And When the weir length is 1 m, the width is 1 m, and the depth is 3 m, the volume becomes 3 m3. When this is filled with a catalytic oxidant, a catalytic oxidizer having a volume of 3 m3 and a residence time of about 29 minutes can be formed. By using a synthetic resin fiber woven cloth or string as the contact oxidant and setting the specific surface area of the oxidant to about 100 m 2 / m 3, the inflow BOD of 10 mg /
Assuming that L is L and treated water BOD is 5 mg / L, the BOD volume load is within an allowable range of 0.3 kg / m3 · day to 0.5 kg / m3 · day.
The D value can be half or less.
【００１５】図２は、円形沈殿池へ本発明を応用した実
施例の断面図である。円形沈殿池の上端部に円周に沿っ
て流出水路２、越流堰３があり、越流堰３の前側に流出
阻止板４を設け、この流出阻止板４と沈殿池壁の間に枠
７、接触酸化材６より構成する接触酸化装置８を設け
る。沈殿池内の処理水は流入管１３より整流管１２を経
て下部に到り、浮遊固形物を沈降分離しつつ接触酸化装
置８に入り、微生物により溶解性有機物を酸化分離し、
残存する浮遊性固形物を付着除去して上部へ出て、越流
堰３を経て流出水路２より系外に移送する。沈降した汚
泥は汚泥かき寄機１０にて中央の汚泥ピット１４に集
め、汚泥引抜き管１５により系外に搬出する。FIG. 2 is a sectional view of an embodiment in which the present invention is applied to a circular sedimentation tank. There is an outflow channel 2 and an overflow weir 3 along the circumference at the upper end of the circular sedimentation tank, and an outflow prevention plate 4 is provided in front of the overflow weir 3, and a frame 7 is provided between the outflow prevention plate 4 and the sedimentation tank wall. A contact oxidation device 8 composed of the contact oxidation material 6 is provided. The treated water in the settling tank reaches the lower part from the inflow pipe 13 through the rectifying pipe 12, enters the contact oxidation device 8 while precipitating and separating the suspended solids, and oxidizes and separates the soluble organic substances by the microorganisms.
The remaining floating solid matter is adhered and removed, and then it goes out to the upper part and is transferred from the outflow water channel 2 to the outside of the system through the overflow weir 3. The sludge that has settled is collected in the central sludge pit 14 by the sludge scraper 10 and carried out of the system by the sludge drawing pipe 15.
【００１６】[0016]
【発明の効果】以上の説明で明らかなように、この発明
に係わる装置は低濃度の溶解性有機物と浮遊性固形物を
除去することができるもので、処理水水質を向上させ、
新規に建設する場合は勿論、既設の処理施設について方
形状の沈殿池でも円形状の沈殿池でも簡単に設置可能で
ある。また、この接触酸化装置は動力を必要とせず沈殿
池の水流を利用するので、イニシャルコスト、ランニン
グコスト共に安価であり、特に、この発明に係る接触酸
化装置は池内に設置するので設置場所として特に用地を
必要としない。As is apparent from the above description, the apparatus according to the present invention can remove low-concentration soluble organic matter and floating solid matter, and improves the quality of treated water.
Of course, when constructing a new construction, it is possible to easily install an existing treatment facility in either a rectangular sedimentation tank or a circular sedimentation tank. Further, since this catalytic oxidizer does not require power and uses the water flow of the settling basin, both the initial cost and the running cost are low, and in particular, the catalytic oxidizer according to the present invention is installed in the pond, so that it is particularly suitable as an installation site. No land needed.
【図１】この発明による方形沈殿池の縦断面図である。FIG. 1 is a vertical sectional view of a rectangular sedimentation tank according to the present invention.
【図２】この発明による円形沈殿池の縦断面図である。FIG. 2 is a vertical sectional view of a circular sedimentation tank according to the present invention.
１ 沈殿池 ３ 越流堰 ４ 流出阻止板 ５ 内側壁 ６ 接触酸化材 1 Settling basin 3 Overflow weir 4 Outflow prevention plate 5 Inner wall 6 Contact oxidizer
Claims (1)
処理水を、沈殿により固液分離する方形又は円形の沈殿
池１において、固液分離した処理水が越流堰３に到達し
て越流堰に入る前側部分に、流出阻止板４を越流堰３に
沿って越流堰より高い水位を保持できる位置に設け、流
出阻止板４の底部を沈殿池１に開放させるとともに、こ
の流出阻止板４と沈殿池１の内側壁５の間に接触酸化材
６を羅列充填して設け、処理水が流失阻止板４に沿って
下側に迂回して接触酸化材６の中を通過し、沈殿池１内
に設けた越流堰３から溢流するようにしたことを特長と
する沈殿池の接触酸化装置。1. In a rectangular or circular settling tank 1 in which treated water obtained by treating organic wastewater by the activated sludge method is subjected to solid-liquid separation by sedimentation, the treated water obtained by solid-liquid separation reaches an overflow weir 3. An outflow prevention plate 4 is provided along the overflow weir 3 at a position where a water level higher than that of the overflow weir can be maintained in the front part of the outflow weir, and the bottom of the outflow prevention plate 4 is opened to the sedimentation basin 1 and A contact oxidant 6 is provided between the stop plate 4 and the inner wall 5 of the settling tank 1 in a line, and the treated water circulates downward along the washout stop plate 4 and passes through the contact oxidant 6. A catalytic oxidizer for a sedimentation tank, which is characterized in that it overflows from an overflow weir 3 provided in the sedimentation tank 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7074649A JPH08243309A (en) | 1995-03-06 | 1995-03-06 | Catalytic oxidation device for sedimentation basin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7074649A JPH08243309A (en) | 1995-03-06 | 1995-03-06 | Catalytic oxidation device for sedimentation basin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08243309A true JPH08243309A (en) | 1996-09-24 |
Family
ID=13553299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7074649A Pending JPH08243309A (en) | 1995-03-06 | 1995-03-06 | Catalytic oxidation device for sedimentation basin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08243309A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11221405A (en) * | 1998-02-05 | 1999-08-17 | Mitsuhiro Fujiwara | Overflow barrage apparatus |
| JP2006281152A (en) * | 2005-04-04 | 2006-10-19 | Matsushita Electric Ind Co Ltd | Apparatus for treating organic wastewater |
| CN108609729A (en) * | 2018-06-06 | 2018-10-02 | 浙江金环宝生物技术有限公司 | Anti- sludge loss device for dispersant type domestic wastewater terminal |
-
1995
- 1995-03-06 JP JP7074649A patent/JPH08243309A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11221405A (en) * | 1998-02-05 | 1999-08-17 | Mitsuhiro Fujiwara | Overflow barrage apparatus |
| JP2006281152A (en) * | 2005-04-04 | 2006-10-19 | Matsushita Electric Ind Co Ltd | Apparatus for treating organic wastewater |
| CN108609729A (en) * | 2018-06-06 | 2018-10-02 | 浙江金环宝生物技术有限公司 | Anti- sludge loss device for dispersant type domestic wastewater terminal |
| CN108609729B (en) * | 2018-06-06 | 2024-05-31 | 浙江金环宝生物技术有限公司 | Anti-pollution mud flow loss device for distributed domestic sewage terminal |
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