CN1162354C - Method for biochemically treating wastewater - Google Patents
Method for biochemically treating wastewater Download PDFInfo
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- CN1162354C CN1162354C CNB011375485A CN01137548A CN1162354C CN 1162354 C CN1162354 C CN 1162354C CN B011375485 A CNB011375485 A CN B011375485A CN 01137548 A CN01137548 A CN 01137548A CN 1162354 C CN1162354 C CN 1162354C
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- aerator tank
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- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- 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
- C02F3/105—Characterized by the chemical composition
-
- 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
- C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
-
- 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
- C02F3/1221—Particular type of activated sludge processes comprising treatment of the recirculated sludge
-
- 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
- C02F3/20—Activated sludge processes using diffusers
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- 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
A method for effectively treating organic matter and nutriments such as nitride and phosphide in wastewater. The treatment comprises follow parts of: a settling tank for separating sand and debris in wastewater by deposition; an anaerobic tank comprising a simple and contact aeration tanks for denitrification of returned sludge in which the nitrogen is converted from ammonia (NH4) to nitrite (NO3) by oxidation, with a carbon source of feeding wasterwater in anaerobic condition to convert nitrogen element to nitrogen gas by adding a denitrogenation oxidation bacterium and discharging the nitrogen gas to air; a biopond equipped with a biomake and an aeration device for activating microorganisms and supplying activated microorganisms into the simple and contact aeration tanks; the simple aeration tank for decomposing organics and for converting ammonia (NH4) to nitrite (NO3); the contact aeration tank for decomposing residual organics and for converting residual ammonia (NH4) to nitrite (NO3) by microorganisms attached to media; a sedimentation tank for settling sludge and for removing residual phosphorus by using coagulation; and a concentration tank for deposited sullage dehydrating to improve concentration.
Description
Technical field
The present invention relates to water treatment method under the biological chemistry mode high-grade, comprise desilting settling bath stage, anaerobic groove stage, biological tank (Bio-pond) stage, simple aerator tank stage, contact aeration groove stage precipitation groove stage and thickener stage.
Background technology
In following water treatment method, the proposition time, and still one of open question was exactly the bad problem of so-called precipitation threshold in settling bath, is difficult to remove simultaneously with biological method the problem of nitrogen and phosphorus at most.That is to say, present problem is, the prior biological treatment process is not good for the corresponding ability of the load variations that flows into former water, because the thread fungus (filamentous microorganism in the aerator tank, Filamentous Microrganisms) too much breeding, cause precipitation threshold bad, cause the unstable of water quality treatment, mud come-up (Rising Sludge) phenomenon in expanded (Bulking Sludge) phenomenon of mud in the settling bath and the settling bath frequently takes place, and flowing into down, the organic matter and the unbalanced of nutrient substance of water cause with the perfect very difficulty of handling of biology mode.
In the following water treatment method abroad, have much more very steps to use, corresponding to water characteristics under the Korea S are methods based on the nutrient substance treatment step.But, to owing to reasons such as region, seasons, altering a great deal of flow, concentration, water under the lower concentration of the low-down Korea S of concentration of the following water of inflow sewage work, whether the nutrient substance removal method of biology mode can adopt is also known (Wallis-Lage hardly, C.L., etc., (1992).Biological NutrientRemoval Using a Low Strength Waste，WEF 65
th Annal Conference&Exposition Proceedings，New Orleans，Sep.20-24，123-124)。
Therefore, need exploitation to adopt and remove step, can effectively handle the treatment process of water under the relatively low Korea S of present organic matter and nutrient concentration with the corresponding nutrient substance of following water state.
Summary of the invention
No matter the following water treatment method that the purpose of this invention is to provide a kind of biological chemistry mode descends nutrient concentration contained in the water high or low, can prevent the mud come-up in the settling bath, effectively removes the nutrient substance of nitrogen and phosphorus and so on.
Discoveries such as the inventor by adopting water treatment method under the high-grade of the present invention, can realize above-mentioned purpose.The inventive method comprises that precipitation removes the silt in the water down and the desilting settling bath stage of impurity, will be in 2 sections aerator tanks that constitute by simple aerator tank and contact aeration groove with the nitrogen element from ammonia (NH
3) attitude is oxidized to nitrogen oxide (NO
3) the mud that returns after the form is anaerobic groove stage that carbon source with nitrogen element transformation be nitrogen discharge to atmosphere in the following water that flows into denitrogenation oxidizing bacteria (Denitifier) under the state that anaerobic exists, the biology group (Bio-comp) that the soil microorganisms immobilization is made activates in biological production device (Bio-maker), be supplied to the biological tank stage of aerator tank, utilize soil microorganisms and the aerobic microbiological of aerator tank itself and the simple aerator tank stage that the lasting oxygen of supplying carries out 1 decompose nitrogen oxidation to the organic matter in the object being treated that flows in the biological tank, utilize the microorganism that adheres on the filtering material to decompose organic and the nitrogen element of nitrogen oxidation contact aeration groove stage of carrying out 2 decompose nitrogen oxidations not to 1 time of flowing into, drop into agglutinant and in settling bath, remove mud, in the settling bath stage of object being treated and phosphorus, sedimentary mud is carried out the thickener stage that processed improves concentration.
The simple declaration of accompanying drawing
Fig. 1 is the mode chart of water treatment system under the biological chemistry mode high-grade of the present invention.
Fig. 2 is the detail drawing of biological tank of the present invention.
Fig. 3 is the mode chart of water treatment system under the southern Yangzhou of the Gyeonggi-Do Korea of technology as a setting.
Embodiment
Below the present invention is described in detail for following water treatment system with reference to the accompanying drawings.
Fig. 1 is the mode chart of water treatment system under the biological chemistry mode high-grade of the present invention.
One of method of the present invention is a water treatment system under a kind of biological chemistry mode high-grade, comprises that precipitation removes the silt in the water down and the desilting settling bath (1) of impurity, will be in 2 sections aerator tanks with the nitrogen element from ammonia (NH
3) attitude is oxidized to nitrogen oxide (NO
3) the mud (13) that returns after the form is anaerobic groove (2) that carbon source with nitrogen element transformation be nitrogen discharge to atmosphere in the following water that flows into denitrogenation oxidation bacterium under the state that anaerobic exists, the biology group (40) that the soil microorganisms immobilization is made activates in biological production device (30), be supplied to the biological tank (6) of aerator tank, utilize the aerobic microbiological of perching in activating soil microorganism in the biological tank (6) and the aerator tank (3) and continue the oxygen of supply carries out the nitrogen oxidation to the ammonia-state nitrogen in the object being treated simple aerator tank (3) by air generator (9), the organic matter that 1 time is decomposed in simple aerator tank (3) is lacked with the residence time and the microorganism that adheres on filtering material (11) of the ammonia-state nitrogen of the nitrogen oxidation contact aeration groove (4) that carries out 2 decompose nitrogen oxidations fully, in the object being treated that has passed through No. 2 aerator tanks (4), drop into agglutinant and remove mud, the settling bath of object being treated and phosphorus (5) carries out the thickener (8) that processed improves concentration to the part in the sedimentary mud.
The others of the inventive method are, be to return the return pipeline (13) of anaerobic groove at the handled thing after contact aeration groove (4) the nitrogen oxidation, for continuing supply mud and keeping suitable microorganism concn (MLSS), to transfer to the pipeline (14) of simple aerator tank (3) at settling bath (5) with flocculation agent agglutinative precipitation mud, for continuing the activation of supply microorganism and the biological group of promotion (40), to return the return pipeline (15) of biological tank (6) at simple aerator tank (3) agglutinative precipitation mud, for the concentrated mud of giving high density dewaters, the residue precipitation mud that comes out from settling bath (5) is transferred to the pipeline (17) of thickener (8), dehydration filtrate is returned the pipeline (18) of simple aerator tank (3), and make in biological tank (8) activatory microorganism and flow into the waste water of pipeline (16) and so on of simple aerator tank (3) and the transfer conduit of mud.
The function and the effect of each reactive tank in the water treatment method under the following more detailed description biological chemistry high-grade of the present invention.The object being treated sanitary sewage is to flow into by very long conduit, therefore contains many silts and impurity.If at first do not remove silt and impurity, can cause mechanical fault and reduce the processing efficiency of subsequent processing steps, be provided with desilting settling bath (1) for this reason to prevent the problems referred to above, groove (1) in advance and to have the homogenization function that the variation that makes down flow that water takes place because of asynchronism(-nization) and concentration reaches minimum.Desilting settling bath (1) foul smell is serious, can carry out all standing as required, blocking-up foul smell, collection and treatment repugnant substance.Flow into anaerobic groove (2) through the object being treated behind the desilting settling bath (1).Object being treated process simple aerator tank (3) and contact aeration groove (4) become ammonia-state nitrogen and are oxidized to by complete nitrogen
The object being treated of form nitrogen oxidation return anaerobic groove (2) by management (13) by contact aeration groove (4), denitrogenation oxidation bacterium with the organic matter in the object being treated that flows into as carbon source the nitrogen element of nitrogen oxide attitude by
Reduce, be discharged in the atmosphere and remove, in the anaerobic groove (2), for making denitrogenation oxidation bacterium and carbon source and NO
x-N fully contacts and mixes, and is equipped with to mix with mixing tank (10).Electron donor used in the denitrogenation oxidizing reaction can use external carbon source acetic acid, citric acid, methyl alcohol etc., and the economic dispatch aspect of not associating considers that the use interior carbon source is the organic matter in the object being treated.
In the water treatment method, the biological tank (6) of serving as extremely important effect is made of biological group of known technology (40) and biological production device (30) under the biological chemistry high-grade of the present invention, and its detailed structure as shown in Figure 2.The most important thing is in the biological processes to remove organic matter rapidly by microorganism, and by guaranteeing handled thing and separating of microorganism stable treated water.Thus, the present invention has used and has been called the troop organic matter of (Bio-clod) of microorganism in the present technique field and removes the good immobilized biological group of soil microorganisms (40) of the good deposition efficiency of ability.Biological group used in the present invention (40) is the soil microorganisms ray fungi (actinomycets) with the high assurance of wastewater treatment adaptability, genus bacillus (bacillus sp.), after micrococcus luteus (micrococcusluteus) and pseudomonas (pseudomonas sp.) etc. are extracted and cultivate, for preventing the stripping of immobilized microorganism in a short time, use 1% of mentioned microorganism, and the abundant subsidiary material of nutritive ingredient and additive carry out the immobilization operation and make.The biological production device (30) of having filled biological group (40) utilizes oxygen without interruption to activate immobilized soil microorganisms, the activation of the microorganism of the mud the inside that promotion is returned through return pipeline (15) continuously by settling bath (5) plays and can not continue biological roll into a ball (40) of supply and also can activate action of microorganisms.It is generally acknowledged that in the biological production device (30), the soak time experimental result of soil microorganisms takes 2-3 days and just can reach desirability.
Object being treated flows in the simple aerator tank (3) through anaerobic groove (2).Middle activatory microorganism of biological tank (6) and the microorganism that exists in aerator tank utilize by air generator (9) oxygen without interruption, make the object being treated of inflow make the organic nitrogen oxidation that takes place by the substance metabolism effect.In this process, the activatory microorganism plays a part to promote more effective the carrying out of nitrogen oxidizing reaction in the biological tank (6), and following reaction takes place in the above-mentioned nitrogen oxidation:
In the above-mentioned reaction, the participation ammonia oxidation is NO
2 -The microorganism of nitrogen oxidising process be Nitrosomonas (N.Europaea, N.monocella) and the microorganism that belongs to of nitrosification coccus (Nitrosococcus), the reaction of the 2nd step makes bacterium nitrobacter, and (microorganism of Nitrobacter (N.agilis, N.winogradsky)) genus and Nitrosocytis (Nitrosocystis genus) is worked.
Object being treated by simple aerator tank (3) flows into contact aeration groove (4).Be filled with in the contact aeration groove (4) and can adhere to template filtering material (medium, Media) (11) of perching many microorganisms.The microorganism that adheres on the filtering material (11) of filling guarantees that the residence time of mud is long, the organic matter that in simple aerator tank, can't remove by 2 nitrogen oxidation removals, can guarantee stable MLSS in the aerator tank, adapt to the change in concentration that flows into former water, the mud growing amount is minimized, save the processing costs of mud.
Object being treated by contact aeration groove (4) flows into settling bath (5).The outflow water of the contact aeration groove (4) that flows into mixes with microorganism and processing water, to the agglutinant that wherein drops into appropriate amount by pipeline (12) from drug storage groove (7), promote the precipitation in the settling bath (5), make treating water and mud realize solid-liquid separation effectively.Like this, make water quality treatment stable, treatment effect is superior, and phosphorus and agglutinant generation chemical reaction contained in the object being treated are precipitated removal effectively.
The object being treated of having removed nutrient substance and microorganism in settling bath (5) fully is discharged at last.Sedimentary mud returns simple aerator tank (3) with the 30-50% that flows into former water through pipeline (14), keeps the suitable MLSS in the aerator tank, promotes (15) by the road to return the activation of the immobilization soil microorganisms of biological tank (6).Other mud beyond (14) and (15) precipitation mud of returning flows into thickener (8) by the road.The precipitation mud that flows into reduces through concentrating volume, after the processed, carries out processing such as landfill, and the concentrated supernatant and the filtrate of deviating from (18) are by the road returned simple aerator tank and handled.
In the water treatment system waste water flow design is realized by gravity for the elevation difference of utilizing each reactive tank under above-mentioned.The loopback of mud and the injected volume of agglutinant can adopt to be adjusted the pump different with working time of flow same pump or use traffic and regulates.
Below be recited as embodiments of the invention.Following examples are just of the present invention with helping to understand, and the present invention is not subjected to the restriction of embodiment.
Embodiment
Make artificial water down with laboratory scale, as shown in table 1 below to the formation and the scale of water treatment system under its above-mentioned biological chemistry.
Each reactive tank is the acrylic acid series material, and handling flow is 10L/ day.
Table 1
| The formation of water treatment system under the present invention | Size (residence time) | Feature |
| The simple aerator tank contact aeration of anaerobic groove groove settling bath biological tank | (1.87L 3 hours) 2.5-3.3L (6-8 hour) 1.25L (2 hours) 1.25L (2 hours) 0.4L (2 days *) | Round shape is equipped with to mix and contains template filtering material (filling 60%) round shape with mixing machine MLSS concentration: 2500-4000mg/L and be filled with biological the group |
| *Residence time length is because the flow that flows into is compared few with other reactive tank in biological tank | ||
Comparative example
Do not use that water treatment system comprises anaerobic condition control region, anaerobic reaction groove, anaerobic air drain, oxygen groove, settling bath etc. under the Gyeonggi-Do Korea south Yangzhou of agglutinant and biological tank.The following water treatment efficiency of embodiment and comparative example as shown in the following Table 2.
Table 2
| BOD | TN (total nitrogen) | TP (total phosphorus) | |||||
| Concentration (mg/L) | Clearance (%) | Concentration (mg/L) | Clearance (%) | Concentration (mg/L) | Clearance (%) | ||
| Comparative example | Flow into former water | 190 | - | 31 | - | 4.3 | - |
| Treating water | 18 | 90.5 | 9.0 | 71.0 | 0.9 | 79.0 | |
| Embodiment | Flow into former water | 249 | - | 43 | - | 9.1 | - |
| Treating water | 6.3 | 97.5 | 8.5 | 80.2 | 0.6 | 93.4 | |
By table 2 as seen, more in the past the following water treatment aspect the clearance of biological oxygen demand (BOD), nitrogen and phosphorus of the following water treatment efficiency of biochemical system of the present invention is superior.
According to water treatment method under the biological chemistry of the present invention, can prevent to worsen because of precipitating the bad water quality treatment that causes in the settling bath, and irrelevant with the organic matter in the following water.Removes nutrient substances such as denitrification and phosphorus simultaneously, not only can stop the eutrophication in lake water and river, and water treatment efficiency is also good down, following water treatment system to keep management also economical.
Claims (3)
1. water treatment method under the biological chemistry mode high-grade comprises:
The desilting settling bath stage of silt and impurity in the following water of precipitation removal,
The mud that returns after 2 sections aerator tank nitrogen oxidation that will be made of simple aerator tank and contact aeration groove is anaerobic groove stage that carbon source with nitrogen element transformation be nitrogen discharge to atmosphere in the following water that flows into denitrogenation oxidation bacterium under the state that anaerobic exists;
The biology group that the soil microorganisms immobilization is made activates in the biological production device, is supplied to the biological tank stage of aerator tank;
Utilize soil microorganisms and the aerobic microbiological of aerator tank itself and the simple aerator tank stage that the lasting oxygen of supplying carries out 1 decompose nitrogen oxidation to the organic matter in the object being treated that flows in the biological tank;
Utilize the microorganism that adheres on the filtering material to decompose organic and the nitrogen element of nitrogen oxidation contact aeration groove stage of carrying out 2 decompose nitrogen oxidations not to 1 time of flowing into;
Drop into agglutinant is removed mud, object being treated and phosphorus in settling bath the settling bath stage; And
Sedimentary mud is carried out the thickener stage that processed improves concentration.
2. water treatment method under the biological chemistry high-grade of claim 1 record comprises:
To return the return pipeline of anaerobic groove at the handled thing after the oxidation of contact aeration groove nitrogen;
For continuing supply mud and keeping suitable microorganism concn (MLSS), will in settling bath, transfer to the pipeline of simple aerator tank (3) with flocculation agent agglutinative precipitation mud;
For continuing the activation of supply microorganism and the biological group of promotion, will return the return pipeline of biological tank at simple aerator tank agglutinative precipitation mud;
For the concentrated mud of giving high density dewaters, the residue precipitation mud that comes out from settling bath is transferred to the pipeline of thickener;
Dehydration filtrate is returned the pipeline of simple aerator tank; And
Make the pipeline that flows into simple aerator tank in biological tank activatory microorganism.
3. water treatment system under the biological chemistry mode high-grade comprises:
The silt under precipitation is removed in the water and the desilting settling bath of impurity;
Will be in 2 sections aerator tanks with the nitrogen element from ammonia (NH
3) attitude is oxidized to nitrogen oxide (NO
3) the mud that returns after the form is anaerobic groove that carbon source with nitrogen element transformation be nitrogen discharge to atmosphere in the following water that flows into the denitrogenation oxidizing bacteria under the state that anaerobic exists;
The biology group that the soil microorganisms immobilization is made activates in the biological production device, is supplied to the biological tank of aerator tank;
Utilize aerobic microbiological that activating soil microorganism that biological tank provides and aerator tank itself perch and continue the oxygen of supply carries out the nitrogen oxidation to the ammonia-state nitrogen in the object being treated simple aerator tank by the air generator;
Organic matter that will 1 time is decomposed in simple aerator tank is lacked with the residence time and the microorganism that adheres on filtering material of the ammonia-state nitrogen of the nitrogen oxidation contact aeration groove that carries out 2 decompose nitrogen oxidations fully;
In the object being treated that has passed through No. 2 aerator tanks, drop into the settling bath that agglutinant is removed mud, object being treated and phosphorus; With
Part in the sedimentary mud is carried out the thickener that processed improves concentration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR63134/2000 | 2000-10-26 | ||
| KR1020000063134A KR100331898B1 (en) | 2000-10-26 | 2000-10-26 | Advanced Treatment Process of Domestic Wastewater by Biological and Chemical |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1350985A CN1350985A (en) | 2002-05-29 |
| CN1162354C true CN1162354C (en) | 2004-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011375485A Expired - Fee Related CN1162354C (en) | 2000-10-26 | 2001-10-26 | Method for biochemically treating wastewater |
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| Country | Link |
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| KR (1) | KR100331898B1 (en) |
| CN (1) | CN1162354C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100416693B1 (en) * | 2001-04-27 | 2004-01-31 | 한국과학기술연구원 | Method for removing nutrients of domestic sewage using 2 step aeration and an apparatus used therefor |
| KR100424250B1 (en) * | 2001-10-12 | 2004-04-03 | 뉴엔텍(주) | Biological process for removing a water pollutant |
| CN100439263C (en) * | 2006-02-24 | 2008-12-03 | 郑俊 | High efficiency, low energy consumption waste water treating and reutilizing process |
| KR100941352B1 (en) * | 2007-12-03 | 2010-02-11 | 한국과학기술연구원 | Novel microorganisms showing excellent nitrification and denitrification effects, bio-clod for treating wastewater, method for the preparation thereof and method for treating wastewater by using the same |
| GB2505856A (en) * | 2011-07-19 | 2014-03-12 | Univ Singapore | Wastewater treatment using natural solid additives in activated sludge process |
| CN103663691B (en) * | 2012-09-19 | 2015-05-06 | 中国石油化工股份有限公司 | Industrial device and treatment method for treating coal-gasification ammonia nitrogen wastewater by synchronous nitrification and denitrification |
| CN108751601A (en) * | 2018-06-26 | 2018-11-06 | 苏州他山石环保科技有限公司 | A kind of agricultural breeding sewage-treatment plant and its processing method |
| CN116947271A (en) * | 2023-09-21 | 2023-10-27 | 青岛锦龙弘业环保有限公司 | Sewage treatment method |
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| JPH02153962A (en) * | 1988-07-04 | 1990-06-13 | Asahi Chem Ind Co Ltd | Thermoplastic acrylic resin composition |
| KR100254523B1 (en) * | 1997-12-17 | 2000-05-01 | 임동혁 | Natural purification method and apparatus thereof |
| KR100271942B1 (en) * | 1998-09-26 | 2000-11-15 | 박호군 | Method for treating high density waste water and apparatus therefore using soil microbe with do controlling aeration tank |
| KR20010011095A (en) * | 1999-07-26 | 2001-02-15 | 박수안 | Antenna structure of helmet with hands free-wireless communication function |
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| KR20010007939A (en) | 2001-02-05 |
| KR100331898B1 (en) | 2002-04-09 |
| CN1350985A (en) | 2002-05-29 |
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