KR200197669Y1 - Waste water purifying system including secondary aeration chamber - Google Patents
Waste water purifying system including secondary aeration chamber Download PDFInfo
- Publication number
- KR200197669Y1 KR200197669Y1 KR2020000009617U KR20000009617U KR200197669Y1 KR 200197669 Y1 KR200197669 Y1 KR 200197669Y1 KR 2020000009617 U KR2020000009617 U KR 2020000009617U KR 20000009617 U KR20000009617 U KR 20000009617U KR 200197669 Y1 KR200197669 Y1 KR 200197669Y1
- Authority
- KR
- South Korea
- Prior art keywords
- tank
- aeration
- sewage
- primary
- aeration tank
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/101—Arranged-type packing, e.g. stacks, arrays
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/121—Multistep treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1242—Small compact installations for use in homes, apartment blocks, hotels or the like
- C02F3/1247—Small compact installations for use in homes, apartment blocks, hotels or the like comprising circular tanks with elements, e.g. decanters, aeration basins, in the form of segments, crowns or sectors
-
- 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
Abstract
본 고안은 학교나 공공시설 등에서 발생하는 오수의 합병처리 정화장치에 관한 것으로서, 상세히는 1 이상의 스크린을 포함하는 스크린조(1);침사유수 분리조(2); 유량조정조(3); 오수계량조(4); 1 이상의 폭기실(5,6)을 포함하는 접촉여재가 내재된 1차 폭기조; 1차 침전조(7); 접촉여재가 내재된 전면폭기방식의 2차 폭기조(8); 2차 침전조(9)가 순차적으로 연결 구성된 2차 폭기 오수정화장치로써 종래의 오수정화장치와 비교하여 접촉여재를 40∼60mm 간격으로 촘촘히 배치시킨 작은 용량의 2차 폭기조를 추가설치함으로써 1차 폭기 처리수의 수질을 단시간에 향상시킬 수 있다.The present invention relates to a sewage treatment and purification device of sewage generated in a school or a public facility, etc. In detail, the screen tank (1) comprising one or more screens; A flow regulating tank 3; A sewage metering tank 4; A primary aeration tank in which contact media including one or more aeration chambers 5 and 6 is embedded; Primary settling tank 7; A secondary aeration tank (8) of the front aeration method in which the contact medium is embedded; Secondary aeration filtration system consisting of two secondary sedimentation tanks (9) sequentially connected to the primary aeration system by installing a small capacity secondary aeration tank of compactly arranged contact media at intervals of 40 ~ 60mm compared to the conventional filtration system The water quality of the treated water can be improved in a short time.
Description
본 고안은 학교나 공공시설 등에서 발생하는 오수의 합병처리 정화장치에 관한 것이다.The present invention relates to a merger treatment and purification device of sewage generated in schools or public facilities.
종래의 오수정화장치는 일반적으로 침전조 →폭기조 →침전조와 같은 순서로 구성되어 있었다. 학교나 공공시설 등의 화장실, 욕실, 식당, 세탁실 등에서 나오는 오수의 합병처리에 있어서 큰 문제점은 식당에서 나오는 오수의 음식물 농도가 높아서 기존의 정화장치만으로는 정화가 부족하다는 것이었다.The conventional sewage purification apparatus has generally been configured in the order of sedimentation tank aeration tank sedimentation tank. A major problem in the merger treatment of wastewater from toilets, bathrooms, restaurants, laundry rooms, etc. of schools and public facilities, is that the purification of the wastewater from the restaurant is high and the existing purification apparatus is insufficient for purification.
이러한 문제를 해결하기 위하여 종래의 정화장치의 후단에 활성탄 흡착이나 오존처리와 같은 2차 처리장치를 부가하는 방법이 사용되어 왔다.In order to solve this problem, a method of adding a secondary treatment device such as activated carbon adsorption or ozone treatment has been used at the rear of the conventional purification device.
그러나, 활성탄 흡착은 부유물질이나 무기물을 흡착하는 방법으로써 폐수 중의 유기물질을 효과적으로 제거할 수 없을 뿐 아니라 일정 시간마다 활성탄을 교체해 주어야 하는 문제점이 있다.However, activated carbon adsorption is a method of adsorbing suspended solids or inorganic materials, and it is difficult to effectively remove organic substances in wastewater, and there is a problem in that activated carbon must be replaced at a predetermined time.
또한, 오존처리는 고가의 오존발생장치가 있어야 하므로 경제적이지 못하다.In addition, ozone treatment is not economical because it requires an expensive ozone generator.
이러한 문제를 해결하고자 1차 폭기조 →침전조의 후단에 다시 폭기조를 설치하려는 시도가 있었으나, 1차 폭기조와 동일한 폭기조를 설치하는 것은 오수정화장치 전체의 용량이 지나치게 커질 뿐만 아니라 경제적인 부담이 커지게 되는 문제점이 있었다.In order to solve this problem, there have been attempts to install the aeration tank again at the rear of the primary aeration tank → the sedimentation tank, but the installation of the same aeration tank as the primary aeration tank not only increases the capacity of the whole sewage purification system but also increases the economic burden. There was a problem.
따라서, 본 고안은 상기 문제점들을 개선하기 위한 것으로서 오수 중의 유기물질을 효과적으로 제거할 뿐만 아니라 용량이 작으면서도 경제적인 오수처리장치를 제공하려는 것이다.Accordingly, the present invention aims to improve the above problems and to provide an effective sewage treatment apparatus with a small capacity as well as an organic substance in the sewage.
도 1은 본 고안의 일 실시예에 의한 2차 폭기 오수정화장치의 측면도1 is a side view of the secondary aeration sewage purification apparatus according to an embodiment of the present invention
도 2는 본 고안의 일 실시예에 의한 2차 폭기 오수정화장치의 처리계통도2 is a processing system diagram of a secondary aeration wastewater purification apparatus according to an embodiment of the present invention
(도면 부호의 설명)(Explanation of reference numerals)
1: 스크린조 2: 침사유수분리조1: screen tank 2: immersion oil separation tank
3: 유량조정조 4: 오수계량조3: flow rate adjusting tank 4: sewage measuring tank
5: 1차 폭기조 1실 6: 1차 폭기조 2실5: 1 aeration tank 1 room 6: 1 aeration tank 2 rooms
7: 1차 침전조 8: 2차 폭기조7: 1st settling tank 8: 2nd aeration tank
9: 2차 침전조 10,10': 침전오니 이송관9: secondary sedimentation tank 10,10 ': sedimentation sludge transfer pipe
11: 산기관11: diffuser
도면을 참조하여 본 고안에 따른 2차 폭기 오수정화장치를 상세히 설명하면 다음과 같다. 본 고안은Referring to the drawings in detail the secondary aeration wastewater purification apparatus according to the present invention will be described. This design
1 이상의 스크린을 포함하는 스크린조(1);A screen bath 1 comprising one or more screens;
침사유수분리조(2);Sedimentary oil separation tank (2);
유량조정조(3);A flow regulating tank 3;
유입된 오수 중 일정량만을 1차 폭기조로 이송시키고 계획유량 이상은 바이패스 도어(By pass door)를 통해 상기 유량조정조로 역류시키는 오수계량조(4);A sewage metering tank (4) for transferring only a predetermined amount of the introduced sewage to the primary aeration tank and backflowing the flow rate to the flow rate adjusting tank through a bypass door;
1 이상의 폭기실(5,6)을 포함하고 접촉여재가 내재된 1차 폭기조;A primary aeration tank including one or more aeration chambers 5 and 6 and in which contact media are embedded;
상기 폭기조로부터 유입된 오수를 침전분리하는 1차 침전조(7);A primary sedimentation tank 7 for sedimenting the sewage introduced from the aeration tank;
1 이상의 폭기실을 포함하고 접촉여재가 내재된 전면폭기방식의 2차 폭기조(8); 2차 침전조(9);A secondary aeration tank (8) of the front aeration method including one or more aeration chambers and having contact media embedded therein; Secondary settling tank 9;
가 순차적으로 연결 구성되고 상기 유량조정조, 오수계량조, 1차 폭기조, 2차 폭기조에는 송풍기로부터 공기를 유입시키도록 각각 1 이상의 산기관(11)이 부설되고, 상기 1차 및 2차 침전조에서 얻어진 침전오니를 상기 스크린조로 이송시키는 침전오니 이송관(10,10')이 부설된 2차 폭기 오수정화장치에 관한 것이다.Are sequentially connected, and one or more diffusers 11 are respectively provided to flow air from the blower in the flow rate adjusting tank, the sewage metering tank, the primary aeration tank, and the secondary aeration tank, and are obtained in the primary and secondary sedimentation tanks. It relates to a secondary aeration sewage purification apparatus is installed sedimentation sludge transfer pipe (10, 10 ') for transferring the settling sludge to the screen tank.
학교 등 공공시설의 화장실, 욕실, 주방, 세탁실 등에서 유입되는 오수는 먼저 스크린조를 거치게 된다. 스크린조(1)는 오수 중에 함유된 부피가 큰 협잡물 등을 걸러 주는 기능을 가진다. 바람직하게는 스크린조는 큰 협잡물을 걸러 주는 조스크린과 비교적 작은 협잡물을 걸러 주는 세스크린, 더욱 작은 협잡물을 걸러 주는 미세스크린과 같이 다수의 스크린이 순차적으로 물의 흐름방향과 직각으로 또는 비스듬히 배치되는 구성을 가질 수 있다.Sewage from the toilets, bathrooms, kitchens and laundry rooms of public facilities, such as schools, is first screened. The screen tank 1 has a function of filtering bulky contaminants and the like contained in sewage. Preferably, the screen tank has a configuration in which a plurality of screens are sequentially arranged at a right angle or at an angle to the flow direction of the water, such as a jaw screen for filtering large contaminants, a three screen for filtering relatively small contaminants, and a micro screen for filtering smaller contaminants. Can have
상기 스크린조의 후단에는 침사유수분리조(2)를 배치하여 비중이 큰 모래 등을 침전시킨다.At the rear end of the screen tank, a sedimentation oil separation tank 2 is disposed to precipitate sand having a specific gravity.
상기 침사유수분리조의 후단에는 오수의 유입에 따른 유량변동을 완화시키고 일정량의 오수를 폭기조로 이송하는 수중펌프가 내장되어 있으며, 항상 공기를 소량 공급하여 오수의 혐기성화를 방지하고 수질을 균등히 유지시키는 유량조정조(3) 및 상기 유량조정조로부터 유입된 오수 중 일정량만을 1차 폭기조로 이송시키고 계획유량 이상은 바이패스 도어(By pass door)를 통해 상기 유량조정조로 역류시키는 오수계량조(4)를 배치한다.At the rear end of the sedimentation oil separation tank, there is a built-in submersible pump that mitigates the fluctuation of flow rate due to the inflow of sewage and transfers a certain amount of sewage to the aeration tank, and always supplies a small amount of air to prevent anaerobicization of sewage and maintain water quality evenly. A flow control tank 3 and a sewage measurement tank 4 for transferring only a predetermined amount of wastewater introduced from the flow control tank to the primary aeration tank, and returning the flow rate to the flow control tank through a bypass door. do.
본 고안의 1차 및 2차 폭기조는 현수미생물 접촉여재를 충진하여 오수를 정화하는 장치로서 접촉재가 360°방향에서 오수와 접촉할 수 있고 접촉여재가 가는 실형태로 구성되어 있어 표면적이 대단히 넓어 부착되는 생물의 양도 많다. 또한, 산기관을 통해 내부로 충분한 용존산소를 공급하여 폭기교반에 의해 오수를 순환시킴으로써 생물성 오니가 상기 접촉여재의 표면에 미생물막으로서 부착되어 생육할 수 있는 조건을 만들어 준다. 따라서, 폭기조로 유입된 오수는 접촉여재에 부착된 미생물막과 반복 접촉함으로써 오수 중의 유기물을 미생물이 소화, 분해시킴으로써 정화되는 것이다.The primary and secondary aeration tanks of the present invention are devices for purifying sewage by filling suspension microorganism contact media. The contact materials can be contacted with sewage in the 360 ° direction, and the contact media are composed of thin threads. There is also a large amount of living things. In addition, by supplying sufficient dissolved oxygen to the inside through the diffuser to circulate the sewage by aeration stirring, the biological sludge is attached to the surface of the contact medium as a microbial membrane to create a condition for growth. Therefore, the sewage introduced into the aeration tank is purified by digesting and decomposing organic matter in the sewage by repeatedly contacting the microbial membrane attached to the contact medium.
BOD농도가 높은 오수를 처리하는, 1 이상의 폭기실(5,6)을 포함하는 1차 폭기조에는 접촉여재를 90∼110mm 간격으로 배치시킨다. 반면, 1차 폭기조를 거치면서 일정 정도 BOD농도가 낮아진 오수가 유입되는 2차 폭기조(8)는 접촉여재의 간격을 40∼60mm로 촘촘히 배치하고, 오수체류시간을 3∼4시간으로 함으로써 1차 폭기조 용량의 20∼30% 정도인 2차 폭기조 용량으로도 수질을 효율적으로 향상시킬 수 있으며, 오수정화장치의 전체적인 용량에 있어서 기존의 오수정화장치와 큰 차이가 나지 않는다. 상기와 같이 1차 폭기처리를 거친 처리수를 접촉여재가 촘촘히 배치된 전면폭기방식의 2차 폭기조에 유입시킴으로써 미생물에 의한 산화 및 필터기능을 효과적으로 수행하게 되어 BOD 30ppm 이상인 1차 폭기 처리수의 수질을 단시간에 간단한 공정으로 BOD 10ppm 이하로 향상시킬 수 있는 것이다. 또한, 오수의 정화효율을 더욱 높이기 위하여는 다수의 폭기실을 포함하는 2차 폭기조를 설치할 수 있다.In the primary aeration tank including one or more aeration chambers 5 and 6 for treating sewage having a high BOD concentration, contact media are arranged at intervals of 90 to 110 mm. On the other hand, the secondary aeration tank 8 into which the sewage with a lowered BOD concentration is introduced through the primary aeration tank is closely arranged with a gap of contact media of 40 to 60 mm, and the sewage retention time is 3 to 4 hours. Secondary aeration tank capacity, which is about 20-30% of the aeration tank capacity, can effectively improve the water quality, and the overall capacity of the sewage purification device is not significantly different from the existing sewage purification device. As mentioned above, the treated water that has undergone the first aeration treatment is introduced into the secondary aeration tank of the front aeration system in which contact media are densely arranged to effectively perform oxidation and filter functions by microorganisms. It can be improved to less than 10ppm BOD in a simple process in a short time. In addition, in order to further increase the purification efficiency of the sewage, a secondary aeration tank including a plurality of aeration chambers may be installed.
상기 2차 폭기조의 후단에는 1차 침전조와 동일한 기능을 하는 2차 침전조(9)를 부설한다.At the rear end of the secondary aeration tank, a secondary precipitation tank 9 having the same function as the primary precipitation tank is laid.
상기 유량조정조, 오수계량조, 1차 폭기조, 2차 폭기조에는 송풍기로부터 공기를 유입시키도록 각각 1 이상의 산기관(11)이 부설되어 있어, 호기성 환경을 만들어 준다.At least one diffuser 11 is installed in each of the flow rate adjustment tank, the sewage metering tank, the primary aeration tank, and the secondary aeration tank to introduce air from the blower, thereby creating an aerobic environment.
그리고, 상기 1차 및 2차 침전조에서 얻어진 침전오니는 침전오니 이송관(10,10')을 통하여 상기 스크린조로 이송된다.In addition, the settling sludge obtained in the primary and secondary settling tank is transferred to the screen tank through the settling sludge transfer pipe (10, 10 ').
또한, 오수의 온도가 상승하거나 오수 중에 계면활성제 등이 많이 유입될 경우 대량의 거품이 발생하게 되는데 이 때 최종방류조의 정화된 물을 사용하여 조의 상부에서 소포노즐로 정화수를 살포함으로써 거품을 제거하는 소포장치를 1차 폭기조 및 2차 폭기조의 각 폭기실에 부가할 수 있다.In addition, when the temperature of the sewage rises or a large amount of surfactant is introduced into the sewage, a large amount of bubbles are generated. At this time, the purified water of the final discharge tank is used to remove the bubbles by spraying the purified water with a small nozzle at the top of the tank. A defoaming device can be added to each aeration chamber of the primary and secondary aeration tanks.
아래 표1은 본 고안의 오수정화장치 중 2차 폭기조에 의한 오수 정화효율(BOD 제거)을 시험한 결과로서, 2차 폭기조로 유입되는 오수의 BOD 값과 2차 폭기조에서 나오는 처리수의 BOD 값을 비교한 것이다.Table 1 below is the result of testing the sewage purification efficiency (BOD removal) by the secondary aeration tank among the sewage purification apparatus of the present invention, the BOD value of the sewage flowing into the secondary aeration tank and the BOD value of the treated water from the secondary aeration tank. Is a comparison.
위의 결과로부터 본 고안의 오수정화장치 중 2차 폭기조는 1차 폭기를 거친 20∼50ppm 정도의 처리수의 수질을 10ppm 이하로 낮출 수 있음을 알 수 있다.From the above results, it can be seen that the secondary aeration tank of the sewage purification apparatus of the present invention can reduce the water quality of the treated water of about 20 to 50 ppm after the first aeration to 10 ppm or less.
상기와 같이 본 고안의 2차 폭기 오수정화장치는 종래의 오수정화장치에 비해 용량이 큰 차이가 나지 아니하므로 생산비, 설비비가 적게 들어 경제적이다.As described above, the secondary aeration sewage purification apparatus of the present invention does not have a large difference in capacity as compared with the conventional sewage purification apparatus, and thus it is economical because production cost and equipment cost are low.
또한, 본 고안의 2차 폭기 오수정화장치는 1차 폭기조에 비하여 접촉여재를 촘촘히 배치한 2차 폭기조를 설치함으로써 미생물 산화 및 필터기능을 동시에 효과적으로 수행하게 되어 단시간에 높은 정화효율을 얻을 수 있다.In addition, the secondary aeration sewage purification apparatus of the present invention by providing a secondary aeration tank with a tightly disposed contact media as compared to the primary aeration tank can effectively perform the microbial oxidation and filter function at the same time can obtain a high purification efficiency in a short time.
나아가, 본 고안의 2차 폭기 오수정화장치는 활성탄 흡착법과 같이 일정 기간마다 활성탄을 교체해 주어야 하는 불편이 없고, 오존처리장치에 비하여 훨씬 경제적으로 오수를 정화시킬 수 있다.Furthermore, the secondary aeration sewage purification apparatus of the present invention has no inconvenience of replacing activated carbon every certain period, such as activated carbon adsorption, and can purify sewage more economically than an ozone treatment apparatus.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2020000009617U KR200197669Y1 (en) | 1999-03-30 | 2000-04-04 | Waste water purifying system including secondary aeration chamber |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019990005133 | 1999-03-30 | ||
| KR2020000009617U KR200197669Y1 (en) | 1999-03-30 | 2000-04-04 | Waste water purifying system including secondary aeration chamber |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019990005133 Division | 1999-03-30 | 1999-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR200197669Y1 true KR200197669Y1 (en) | 2000-09-15 |
Family
ID=19574334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2020000009617U KR200197669Y1 (en) | 1999-03-30 | 2000-04-04 | Waste water purifying system including secondary aeration chamber |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR200197669Y1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100380321B1 (en) * | 2000-09-26 | 2003-04-16 | 주식회사 장호 | The high efficiency apparatus for purifying be high efficiency of fluid contact agent and the fixture contact agent |
| KR100700129B1 (en) | 2006-12-23 | 2007-03-28 | 김봉길 | Waste Water Treatment System |
-
2000
- 2000-04-04 KR KR2020000009617U patent/KR200197669Y1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100380321B1 (en) * | 2000-09-26 | 2003-04-16 | 주식회사 장호 | The high efficiency apparatus for purifying be high efficiency of fluid contact agent and the fixture contact agent |
| KR100700129B1 (en) | 2006-12-23 | 2007-03-28 | 김봉길 | Waste Water Treatment System |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8211316B2 (en) | Device for deep sewage treatment without sludge discharge | |
| KR960013340B1 (en) | Two-stage waste water treatment | |
| KR101036622B1 (en) | Apparatus for Treatment of Ship Wastewater | |
| KR200197669Y1 (en) | Waste water purifying system including secondary aeration chamber | |
| KR0126883Y1 (en) | Facilities for treating waste water on a large scale | |
| CN206927755U (en) | Integrated sewage treating apparatus | |
| KR100619094B1 (en) | A waste water disposal plant | |
| KR101814983B1 (en) | An apparatus for microorganism sludge holding | |
| CN214654276U (en) | Filler-reinforced domestic sewage treatment system | |
| KR20000045943A (en) | Treating method of wastewater using activated microorganism | |
| JPH11104698A (en) | Drainage treatment method | |
| KR100414688B1 (en) | Foul drain processing unit and method using settling chamber and biofilm filteration aquarium | |
| WO2015064933A1 (en) | Method for treating drain-water using sludge aeration in water treatment plant | |
| KR200165565Y1 (en) | Hanging microbe contact aeration purifier | |
| KR20040020325A (en) | A method for treating the graywater by membrane | |
| KR100460942B1 (en) | Process for Treating Waste Water and Device Thereof Using Septic Tank and Sequencing Batch Reactor | |
| KR100316688B1 (en) | A waste water disposal apparatus | |
| JP2006218435A (en) | Activated sludge treatment system | |
| KR20000072403A (en) | The treatment system of discharging water in the treatment equipment of sewage and serious contaminated rivers water utilizing the contact oxidation method | |
| KR200182581Y1 (en) | A waste water disposal apparatus | |
| CN211770837U (en) | Domestic sewage treatment system | |
| CN109292980A (en) | A kind of adjustable multistage AO-MBBR process spent water processing unit of series and method | |
| KR840001104B1 (en) | Apparatus for treating waste water, or sewage by aerobic processes | |
| KR950011768B1 (en) | Waste water purifier | |
| JP2520798B2 (en) | Method and apparatus for biological dephosphorization of organic wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| T201 | Request for technology evaluation of utility model | ||
| REGI | Registration of establishment | ||
| T701 | Written decision to grant on technology evaluation | ||
| FPAY | Annual fee payment |
Payment date: 20090108 Year of fee payment: 9 |
|
| EXPY | Expiration of term |