JPS6211638B2 - - Google Patents
Info
- Publication number
- JPS6211638B2 JPS6211638B2 JP52152197A JP15219777A JPS6211638B2 JP S6211638 B2 JPS6211638 B2 JP S6211638B2 JP 52152197 A JP52152197 A JP 52152197A JP 15219777 A JP15219777 A JP 15219777A JP S6211638 B2 JPS6211638 B2 JP S6211638B2
- Authority
- JP
- Japan
- Prior art keywords
- aeration tank
- treated
- liquid
- air
- aeration
- 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.)
- Expired
Links
- 238000005273 aeration Methods 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 24
- 239000010802 sludge Substances 0.000 claims description 16
- 239000010865 sewage Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 description 7
- 238000000746 purification Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid 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)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Description
【発明の詳細な説明】
本発明は活性汚泥法による汚水処理装置に関す
るものである。
従来この種の汚水処理装置は、上部が開放する
曝気槽内の汚水中に散気管を沈め、この散気管に
圧送した高圧エアを該散気管の小孔より流出さ
せ、該エアのリフト作用によつて曝気させる構造
である。重力下において曝気させる汚水処理装置
は、酸素吸収速度が50〜100ppm／Hrであり、
BOD容積負荷は0.9〜1.2Kg／m2・日 位であるた
め、浄化能率が低いという問題点がある。
本発明は上記の点に鑑み、空気と汚水との混合
を円滑に行なわせるようにして浄化能率の向上を
計ることを目的とするもので、以下一実施例を示
す図面に基づいてその詳細を説明すると下記の通
りである。
図において、１は密閉された環状の曝気槽であ
る。この曝気槽１は実施例の場合、汚水、及び返
送汚泥の通路が円形のものを図示したがその形状
は図示例に限られるものではない。例えば曝気槽
１内の汚水・返却汚泥の通路が四角形のもの、該
通路が三角形のもの、あるいは該通路が長円形の
もの等であつてもよい。図示例のように、曝気槽
１内の通路が円形のものにおいては汚水及び返送
汚泥の流動を円滑に行なわせることができ、浄化
能率の向上の点において有利な形状である。
曝気槽１の上部一側には原水と汚泥の混合物か
ら成る被処理液の流入管２と、この流入管２の下
方にエア噴射ノズル３とが接続されている。
４は曝気槽１の下部一側に設けた循環ポンプで
あつて、該ポンプ４の吸込管５は曝気槽１の下部
に接続され、また吐出管６は曝気槽１の他側に接
続されている。吸込管５中途にはバルブ７が取付
けられ、該バルブ７を開放した状態において循環
ポンプ４を駆動すると曝気槽１内に供給された被
処理液は第１図の矢印方向に循環流動し、前記流
入管２からの被処理液およびエア噴射ノズル３か
らのエアは上記被処理液の流動方向と同方向に供
給されるようになつている。
８は曝気槽１の他側上部に接続された処理水の
排水管、９は曝気槽１の頂部に接続された排ガス
流出管であつて、圧力調整弁１０が取付けてあ
る。
実施例で示す汚水処理装置は上記の構成から成
り、流入管２より曝気槽１内に被処理液を供給
し、曝気槽１内に被処理液を充満させた状態にお
いて循環ポンプ４を駆動すると、被処理液は第１
図の矢視方向に旋回する。
被処理液を曝気槽１内で旋回流動させた状態に
おいてエア噴射ノズル３より高圧エアを吹き込む
と、この吹き込まれたエアは曝気槽１内で旋回す
る汚水の水流にのり、水流の方向に移動し、その
移動の間でエア中の酸素は汚水に吸収され、活性
汚泥にて汚水中の有機物は分解される。
曝気槽１内にエアを吹き込む場合、該曝気槽１
内での空気の上昇速度が被処理液の旋回流速より
遅くなるようにして運転するものである。このた
め、エア噴射ノズル３より吹き込まれたエアは、
該エアの上昇速度より速い被処理液の水流速にの
つて移動するので、エアと被処理液との混合は円
滑に行なわれることになり、被処理液中の有機物
は効果的に分解されることになる。
上記のようにして被処理液を曝気処理した場
合、曝気槽１内の頂部には不要になつたエア、及
び有機物の分解等で発生したガスが溜り、之等の
エア及びガスは圧力調整弁１０より大気中に放出
される。
又、曝気処理された処理水は、排水管８より次
段の浮上分離槽に送られて固液分離されると共に
流入管２には固液分離された汚泥の一部と汚水が
定量供給される。
以上のように本発明は、密閉された環状の曝気
槽１に被処理液を供給し、この被処理液を循環ポ
ンプ４の駆動によつて一方向に流動せしめ、この
流動方向と同方向に被処理液およびエアを噴射す
ると共に、エアの噴射位置を被処理液の下降流位
置としたので、エアと汚水との混合が円滑に行な
われ、酸素供給能を高くすることができる。この
ため、汚水の浄化処理の向上を計ることができる
と共に、曝気槽１で曝気処理した処理水を次段の
浮上分離槽に供給し、該浮上分離槽で分離した高
濃度の汚泥を汚水と共に流入管２に供給するた
め、曝気槽１内のMLSS（活性汚泥濃度）を高濃
度に維持することができる。したがつて汚泥令が
長くなり、汚泥が自己消化され、余剰汚泥の発生
量を少なくすることができる。
また、密閉された曝気槽１を用い、加圧下で運
転するため、高濃度廃水処理が可能になり、しか
も容積負荷を大きくとれるため、散気管を用いる
従来の活性汚泥法に比べ設置面積を減少させるこ
とができる。
因みに、本発明の装置と散気管を用いる従来の
活性汚泥処理法の比較を下表に示す。
【表】DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sewage treatment apparatus using an activated sludge method. Conventionally, this type of sewage treatment equipment submerged an aeration pipe into waste water in an aeration tank with an open top, and forced high-pressure air into the aeration pipe to flow out through a small hole in the aeration pipe, thereby creating a lift effect of the air. It has a structure that allows for aeration. Sewage treatment equipment that aerates under gravity has an oxygen absorption rate of 50 to 100 ppm/Hr,
Since the BOD volumetric load is around 0.9 to 1.2 Kg/m 2 ·day, there is a problem that the purification efficiency is low. In view of the above points, the present invention aims to improve purification efficiency by smoothly mixing air and wastewater, and the details thereof will be explained below based on the drawings showing one embodiment. The explanation is as follows. In the figure, 1 is a sealed annular aeration tank. In this embodiment, the aeration tank 1 is shown as having a circular path for sewage and return sludge, but its shape is not limited to the illustrated example. For example, the passage for sewage and returned sludge in the aeration tank 1 may be square, triangular, or oval. As shown in the illustrated example, if the passage in the aeration tank 1 is circular, the sewage and returned sludge can flow smoothly, and this is an advantageous shape in terms of improving the purification efficiency. An inflow pipe 2 for a liquid to be treated consisting of a mixture of raw water and sludge is connected to one side of the upper part of the aeration tank 1, and an air injection nozzle 3 is connected below this inflow pipe 2. Reference numeral 4 denotes a circulation pump provided at one side of the lower part of the aeration tank 1, the suction pipe 5 of the pump 4 is connected to the lower part of the aeration tank 1, and the discharge pipe 6 is connected to the other side of the aeration tank 1. There is. A valve 7 is attached to the middle of the suction pipe 5, and when the circulation pump 4 is driven with the valve 7 open, the liquid to be treated that is supplied into the aeration tank 1 circulates and flows in the direction of the arrow in FIG. The liquid to be treated from the inflow pipe 2 and the air from the air injection nozzle 3 are supplied in the same direction as the flow direction of the liquid to be treated. 8 is a drain pipe for treated water connected to the upper part of the other side of the aeration tank 1, and 9 is an exhaust gas outlet pipe connected to the top of the aeration tank 1, to which a pressure regulating valve 10 is attached. The sewage treatment apparatus shown in the embodiment has the above-mentioned configuration, and when the liquid to be treated is supplied into the aeration tank 1 from the inflow pipe 2 and the circulation pump 4 is driven while the aeration tank 1 is filled with the liquid to be treated. , the liquid to be treated is the first
Turn in the direction of the arrow in the figure. When high-pressure air is blown from the air injection nozzle 3 while the liquid to be treated is swirling and flowing in the aeration tank 1, this blown air rides on the flow of wastewater swirling in the aeration tank 1 and moves in the direction of the water flow. During this movement, oxygen in the air is absorbed by the wastewater, and organic matter in the wastewater is decomposed by activated sludge. When blowing air into the aeration tank 1, the aeration tank 1
It is operated so that the rate of rise of air within the chamber is slower than the swirling flow rate of the liquid to be treated. Therefore, the air blown from the air injection nozzle 3 is
Since the water moves with the flow rate of the liquid to be treated which is faster than the rising speed of the air, the air and the liquid to be treated are mixed smoothly, and the organic matter in the liquid to be treated is effectively decomposed. It turns out. When the liquid to be treated is aerated as described above, unnecessary air and gas generated from decomposition of organic matter, etc. accumulate at the top of the aeration tank 1, and the air and gas are removed by the pressure regulating valve. 10 and released into the atmosphere. In addition, the aerated treated water is sent from the drain pipe 8 to the next stage flotation separation tank where it is separated into solid and liquid, and a portion of the solid-liquid separated sludge and sewage are supplied in fixed quantities to the inflow pipe 2. Ru. As described above, in the present invention, a liquid to be treated is supplied to a sealed annular aeration tank 1, and the liquid to be treated is caused to flow in one direction by driving the circulation pump 4, and in the same direction as this flow direction. Since the liquid to be treated and the air are injected, and the air is injected at a position where the liquid to be treated flows downward, the air and waste water are mixed smoothly, and the oxygen supply capacity can be increased. Therefore, it is possible to improve the purification treatment of sewage, and the treated water aerated in the aeration tank 1 is supplied to the next flotation tank, and the highly concentrated sludge separated in the flotation tank is collected together with the sewage. Since the activated sludge is supplied to the inflow pipe 2, the MLSS (activated sludge concentration) in the aeration tank 1 can be maintained at a high concentration. Therefore, the sludge period becomes longer, the sludge is self-extinguished, and the amount of surplus sludge generated can be reduced. In addition, since the sealed aeration tank 1 is used and operated under pressure, it is possible to treat high-concentration wastewater, and the volumetric load can be increased, reducing the installation space compared to the conventional activated sludge method that uses aeration pipes. can be done. Incidentally, a comparison between the apparatus of the present invention and a conventional activated sludge treatment method using an aeration tube is shown in the table below. 【table】
第１図は本発明に係る装置の一実施例を示す縦
断正面図、第２図は同上の右側面図である。
１…曝気槽、２…流入管、３…エア噴射ノズ
ル、４…循環ポンプ、８…排出管。
FIG. 1 is a longitudinal sectional front view showing one embodiment of the apparatus according to the present invention, and FIG. 2 is a right side view of the same. 1... Aeration tank, 2... Inflow pipe, 3... Air injection nozzle, 4... Circulation pump, 8... Discharge pipe.
Claims (1)
部より内部に原水と返送汚泥の混合物から成る被
処理液を供給する流入管と、上記曝気槽内の被処
理液を一方向に流動させる循環ポンプと、曝気槽
内において流動する被処理液の下降流位置にエア
を吹き込むエア噴射ノズルと、処理水を曝気槽の
上部より排出させる排出管とを備え、前記流入管
からの被処理液の供給方向およびエア噴射ノズル
からのエア噴射方向を曝気槽において流動する被
処理液の流動方向と同方向にした汚水処理装置。1. A sealed annular aeration tank, an inflow pipe that supplies a liquid to be treated consisting of a mixture of raw water and returned sludge from the upper part of the aeration tank to the inside, and a liquid to be treated in the aeration tank that flows in one direction. It is equipped with a circulation pump, an air injection nozzle that blows air into a downward flow position of the liquid to be treated flowing in the aeration tank, and a discharge pipe that discharges the treated water from the upper part of the aeration tank, and the liquid to be treated from the inflow pipe is A sewage treatment device in which the direction of supply of water and the direction of air injection from an air injection nozzle are the same as the flow direction of a liquid to be treated flowing in an aeration tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15219777A JPS5484357A (en) | 1977-12-17 | 1977-12-17 | Sewage disposal plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15219777A JPS5484357A (en) | 1977-12-17 | 1977-12-17 | Sewage disposal plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5484357A JPS5484357A (en) | 1979-07-05 |
| JPS6211638B2 true JPS6211638B2 (en) | 1987-03-13 |
Family
ID=15535170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15219777A Granted JPS5484357A (en) | 1977-12-17 | 1977-12-17 | Sewage disposal plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5484357A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0282088U (en) * | 1988-12-14 | 1990-06-25 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58119392A (en) * | 1982-01-04 | 1983-07-15 | Unitika Ltd | Apparatus for treating sewage |
-
1977
- 1977-12-17 JP JP15219777A patent/JPS5484357A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0282088U (en) * | 1988-12-14 | 1990-06-25 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5484357A (en) | 1979-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3643403A (en) | Downflow bubble contact aeration apparatus and method | |
| US3840216A (en) | Vacuum aeration of liquid waste effluent | |
| US4043771A (en) | Method of and apparatus for the dissolution of gases in liquids | |
| JPH0248098A (en) | Improved high pressure oxygen saturated water treatment apparatus | |
| US3910838A (en) | Method and apparatus for the purification of aqueous effluent | |
| US6315893B1 (en) | Gas/liquid mixer with degasifier | |
| GB1596311A (en) | Process and apparatus for the bacterial sludge treatment of aqueous waste material | |
| CN107698025B (en) | Integrated sewage denitrification and dephosphorization device | |
| JP3731806B2 (en) | Organic wastewater treatment method and apparatus | |
| JPS6211638B2 (en) | ||
| CN1130248C (en) | Vapor-liquid mixer and polluted water purification apparatus using mixer | |
| US3236767A (en) | Waste treatment process | |
| CN104773810A (en) | Catalytic ozonation device | |
| KR101203944B1 (en) | Denitrification system using micro bubble floating device | |
| JP3953127B2 (en) | Aeration treatment equipment | |
| KR20000015099A (en) | Process and equipment of waste water treatment for removing phosphorus and nitrogen by periodical aeration | |
| KR100626180B1 (en) | Method and Apparatus for the Biological Wastewater Treatment | |
| JPS5794388A (en) | Sludge concentrating device | |
| JPH0429798A (en) | Ozone contact method in water purifying treatment | |
| JPH05305287A (en) | Ozone contact reaction device | |
| JPS61227819A (en) | Method and apparatus for aeration combining deodorizing | |
| RU2181343C2 (en) | Aerator for liquid | |
| JPH0127914Y2 (en) | ||
| SU916437A1 (en) | Apparatus for purifying effluents | |
| JPH03270796A (en) | Apparatus for purifying water area |