CN102432100B - Method for efficiently degrading morpholine waste water - Google Patents
Method for efficiently degrading morpholine waste water Download PDFInfo
- Publication number
- CN102432100B CN102432100B CN 201110331401 CN201110331401A CN102432100B CN 102432100 B CN102432100 B CN 102432100B CN 201110331401 CN201110331401 CN 201110331401 CN 201110331401 A CN201110331401 A CN 201110331401A CN 102432100 B CN102432100 B CN 102432100B
- Authority
- CN
- China
- Prior art keywords
- waste water
- morpholine
- reactor
- anoxic
- morpholine waste
- 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 - Fee Related
Links
Images
Abstract
The invention relates to a method for efficiently degrading morpholine waste water. The method comprises the following steps of: putting multiple microorganisms and sludge into a reactor, wherein the multiple microorganisms include Delftia tsuruhatensis WXZ-9 CGMCC No.1797 and comamonas WXZ-17 CGMCC No.3048 and keeping the temperature at 20-30 DEG C; adding morpholine waste water, mechanically stirring, and running in the anoxic state at the pH 7.8-8.2 for 6-48 hours; entering an aerobic section from an anoxic section, mechanically stirring while blowing and aerating, and running at the pH 7.8-8.2 for 14-34 hours; entering the anoxic section from the aerobic section and mechanically stirring at the pH 7.8-8.2 for 0-22 hours; and after the anoxic process is completed, standing for two hours and draining. In the method, biochemistry, nitrification and denitrification are performed simultaneously under the same aerobic condition in the same reaction system, so that the investment expense and running cost are reduced greatly.
Description
Technical field
The present invention relates to a kind of method of efficient degradation morpholine waste water, specifically, be a kind of carbon in the morpholine waste water, nitrogen heterocyclic to be carried out biochemical reaction by the microorganism in the active sludge in same reactor, the treatment process that makes it to degrade belongs to technical field of sewage.
Background technology
Domestic processing research report to morpholine waste water is less.For the processing of morpholine raffinate, Tian Huaiguang has proposed the method for burning disposal, in the morpholine raffinate water content of light constituent be 86.23%, COD value up to 346000mg/L, this is favourable to burning disposal.What domestic present research was hot is to reclaim N-methylmorpholine and N-ethylmorpholine from morpholine waste water, reduces its quantity discharged, and recyclable utilization.But the technical study of handling morpholine waste water with biochemical process does not almost have.
From nineteen eighty-two, people such as Knapp at first isolate two strains and can utilize morpholine as the bacterial strain of sole carbon source, nitrogenous source and the energy from active sludge, carried out the research to the morpholine biochemical degradation.1998, S.Chandrasekaran and D.Lalithakumari concentration and separation from contaminated soil went out the strain Pseudomonas fluorescens CAS102 rapidly that grows, and it can utilize morpholine as its unique energy, thereby degrades morpholine effectively.In the same year, people such as B.COMBOURIEU isolate the strain mycobacterium fast that grows from contaminated active sludge, and it can be morpholine as unique nitrogenous source, carbon source and the energy.They have found the degradation pathway of morpholine, and find that this bacterium contains Cytochrome P450.2000, people such as Thomas Schrader isolate a strain bacterial strain HE5 from forest soil, this bacterial strain is analyzed by 16SrDNA and is accredited as the strain mycobacterium fast that grows, and it can be morpholine as unique nitrogenous source, carbon source and the energy, and find that this bacterial strain contains Cytochrome P450.The optimum growing condition of bacterial strain HE5 is the 30mM morpholine, pH7.2, and 30 ℃, the morpholine of the 10～15mM that can in 10 hours, degrade, this is the fastest bacterial strain of reporting up to now of degraded morpholine.Domestic report about decomposition morpholine bacterial strain is not seen as yet yet.
Summary of the invention
Contain morpholine, N-methylmorpholine and N (2-hydroxyethyl) morpholine etc. in the morpholine waste water, account for 35%～60% of total organic content greatly, biodegradability is poor, is difficult to degraded.Therefore must adopt especially, biochemical processing process is handled targetedly.The objective of the invention is to cultivate the superior microorganism colony in the active sludge and add special bacterial strain by domestication, in process of growth, utilize in the water and carry out metabolism about pollution substance, morpholine waste water is degraded significantly.
The method of efficient degradation morpholine waste water provided by the invention, be that morpholine waste water is added in the reactor, bubbling air behind the anaerobic treatment certain hour, the nitration denitrification process that also will carry out aerobic denitrogenation after decomposing because of biochemistry, so DO need keep higher level and carries out aerobic treatment.Concrete steps comprise:
A. adopt common SBR (sequence intermittent activated sludge process) reactor, be equipped with composite flora and mud in the reactor, composite flora consist of the Ford bacterium WXZ-9 of Dell (Delftia tsuruhatensis), its preserving number is CGMCC No.1797, preservation day is on September 7th, 2006, depositary institution is China Committee for Culture Collection of Microorganisms common micro-organisms center, with comamonas WXZ-17 (Comamonas sp.), its preserving number is CGMCC No.3048, preservation day is on April 30th, 2009, depositary institution is China Committee for Culture Collection of Microorganisms common micro-organisms center, composite flora and mud mix, and temperature of reaction remains on 20～30 ℃; The sbr reactor cycle by: anoxic → aerobic-anoxic leaves standstill to be formed.
B. morpholine waste water is added in the reactor, and adopt mechanical stirring that muddy water is mixed, the anoxic operation, pH controls 7.8～8.2, and be 6～48h hour working time, and working time is relevant with influent concentration, down together;
C. enter aerobic section by the anoxic section, adopt mechanical stirring to add blast aeration, pH controls 7.8～8.2, and be 14～34 hours working time; Adopt gas blower (or air compressor machine) and efficient microporous diffuser in reactor, to carry air, make to keep the high-solubility oxygen state in the reactor;
D. enter the anoxic section by aerobic section, adopt mechanical stirring, the anoxic operation, pH controls 7.8～8.2, and be 0～22 hour working time;
E. leave standstill water outlet in 2 hours after the anoxic process is finished.
The COD of pending morpholine waste water (chemical oxygen demand (COD)) is 1000～3300mg/L among the present invention, and TN (total nitrogen) is 130～570mg/L, and wherein morpholine, N-methylmorpholine and N (2-hydroxyethyl) morpholine accounts for 35%～60 quality % of total organic matter.
In the composite flora, the mass ratio of the Ford bacterium WXZ-9 CGMCC No.1797 of Dell and comamonas WXZ-17CGMCC No.3048 is 1: 1; The quality of composite flora is 10～40% of mud dry substance matter quality.
Described mud is common sludge treatment plant mud.After morpholine waste water added reactor, the concentration of mud was 2～6g/L in the reactor.
In step b and the steps d anoxic process, DO (dissolved oxygen) is 0～0.5mg/L in the control reactor.
In the step c aerobic processes, DO is 4～5mg/L in the control reactor.
In the steps d, be 0～9 hour described working time.
The COD of water outlet is 200～1265mg/L among the present invention, and TN is 40～188mg/L, NH
3Be 8～12mg/L, wherein NH
3Reached emission standard.The clearance of COD is that the clearance of 45～90%, TN is 45～80% in the morpholine waste water.
The Ford bacterium WXZ-9 of Dell provided by the invention (Delftia tsuruhatensis) on September 7th, 2006, is preserved in China Committee for Culture Collection of Microorganisms common micro-organisms center in Beijing, its preserving number is CGMCC No.1797.Comamonas WXZ-17 (Comamonas sp.) on April 30th, 2009, is preserved in China Committee for Culture Collection of Microorganisms common micro-organisms center in Beijing, its preserving number is CGMCC No.3048.
The inventive method is handled morpholine waste water, has mainly solved a following difficult problem:
1, morpholine waste water is a kind of high organonitrogen concentration, high COD
CrConcentration and low BOD
5/ COD
CrThe waste water of ratio.Because morpholine, N-methylmorpholine are all as the nitrogen oxygen helerocyclics, the dual factor of its ring texture and itrogenous organic substance has strengthened the biochemical degradation difficulty.The present invention adopts special bacterial strain in conjunction with patented technology, through domestication for a long time, turns out the mud of suitable degraded morpholine, has improved the degradation rate of morpholine greatly.
2, its ammonia-nitrogen content of present technique application morpholine waste water is extremely low, the overwhelming majority is the organonitrogen on the nitrogen oxa-ring, when therefore operation is just intake, need to replenish carbon source, the nitrogenous source (as glucose, ammonium sulfate) that part is easily degraded, progressively improve the morpholine waste water proportioning that adds in the domestication process again.
3, handle in the process of morpholine waste water in present method, biochemical, nitrated, denitrification three-step reaction is compared, and biological process is most important, the difficulty maximum.In case ammonia nitrogen generates, nitrated, denitrification namely carries out simultaneously, and this is the important feature of present technique.And the carbon source that denitrification needs is directly absorbed from morpholine waste water.
4, simplify pH regulator.Present technique adopts synchronous nitration/denitrification denitrogenation, makes the acid of nitrifying process product and denitrification process produce alkali and cancels out each other, and simplifies pH regulator, has reduced the consumption of pharmaceutical chemicals.
Treatment technology of the present invention uses the method for biochemical treatment, the processing efficiency height, technical process is simple, and microorganism is reacted in structures, need not to divide different operating units in the time with the space, to having reduced the complicacy of disposable facility investment, working cost and operation widely.
When influent quality is COD=2466mg/L, the waste water of TN=435mg/L can reach water outlet COD through the processing of one-period and be about 200mg/L, and TN is about 100mg/L, NH
3Be about 10mg/L.
The present invention has the following advantages:
1, in the above-mentioned treatment process of present technique, owing to introduced the bacterial strain with special degradability, and in conjunction with technology biochemical, nitrated and that denitrification carries out in same reactive system simultaneously, successfully reach biochemical degradation and handle the purpose of morpholine waste water, and the difficulty that effectively simplifies the operation, reduce investment cost and running cost greatly.
2, in the above-mentioned treatment process of present technique, because nitrification and denitrification carries out simultaneously in same reactor and finishes, changed the demand that there are strong opposite potential of hydrogen in traditional aerobic nitrification and anoxic denitrification system, thereby the variation of potential of hydrogen has been had very strong shock absorption.
3, owing to biochemical, the nitrated and denitrification flora of growing simultaneously in the composite flora, reactant directly becomes the substrate of next step reaction, avoids the accumulation of reactant, the process of accelerated reaction.C/N can be adapted to than the influent load that alters a great deal, very high organic influent load and ammonia nitrogen loading can be adapted to simultaneously.
4, save reactor volume and structures floor space, reduce investment.
The present invention contains the aerobic nitrification/denitrification mud of special bacterial strain by domestication, a step in the sbr reactor device is handled morpholine waste water by anoxic and multistage such as aerobic, pH remains on 7.8～8.2, need not add microcosmic salt, under the situation of adding a small amount of carbon source and nitrogenous source, through the operation of nearly half a year, morpholine influent waste water COD
CrBe about 2500mg/L and 415mg/L respectively with total average nitrogen concentration, need not other pre-treatment, reactor water outlet COD is about 200mg/L, and TN is about 100mg/L, NH
3-N is about 10mg/L.Wherein the COD clearance reaches more than 90%, and the TN clearance reaches more than 75%.
Description of drawings
Fig. 1 is the synoptic diagram of waste water treatment process reactor of the present invention.
Embodiment
Below by concrete enforcement example foregoing of the present invention is described in further detail, but this should be interpreted as that the scope of the above-mentioned theme of the present invention only is confined to following example.All same quadrat methods that realizes based on the above-mentioned theme of the present invention all should belong to scope of the present invention.
As shown in Figure 1, be the synoptic diagram of equipment therefor of the present invention.Wherein, 1 is SBR (sequence intermittent activated sludge process) reactor, and 2 is electric mixer, and 3 is microporous diffuser, and 4 is air compressor machine, and 5 is under meter, and 6 is controller, and 7 is overflow port, and 8 is water port, and 9 is mud discharging mouth, and 10 is heating rod.
The method of efficient degradation morpholine waste water provided by the invention, for morpholine waste water is introduced in the reactor, bubbling air behind the anaerobic treatment certain hour makes DO keep higher level and carries out aerobic treatment.Concrete steps comprise:
A. in sbr reactor device 1, add the composite flora of total sludge quantity (dry substance matter quality) 10～40%.The composite flora source is: Ford bacterium WXZ-9 (Delftia tsuruhatensis) CGMCCNo.1797 of laboratory strains Dell and comamonas WXZ-17 (Comamonas sp.) CGMCC No.3048 are mixing in 1: 1 with mass ratio.Composite flora and mud mix, and temperature of reactor keeps 20～30 ℃, so that bacterial activity is the highest; Mud is common sludge treatment plant mud; Reactor effective volume 5L, phase water outlet 2L remains 3L weekly, enters next cycle and mends into 2L;
The Ford bacterium WXZ-9 CGMCC No.1797 of Dell and comamonas WXZ-17 CGMCC No.3048 enlarged culturing condition: 30 ℃, 140r/min cultivated 72 hours;
Enlarged culturing base: LB substratum, KNO
31g, KH
2PO
41g, FeCl
26H
2O 0.05g, CaCl
27H
2O0.02g, MgSO
47H
2O 1g, trisodium citrate 5.1g, distilled water 1000mL, 121 ℃ of sterilization 20min.
B. the COD (chemical oxygen demand (COD)) of will intaking is 1000～3300mg/L, and TN (total nitrogen) is that the morpholine waste water of 130～570mg/L adds reactor, adopts mechanical stirring to guarantee that muddy water mixes, and sludge concentration is 2～6g/L in the reactor, carries out the operation of anoxic section; PH control is 7.8～8.2, and be 6～48 hours working time.In the anoxic process, can control the interior DO (dissolved oxygen) of reactor is 0～0.5mg/L.
C. anoxic connects the operation of oxygen stage after the stage.Aerobic stage adopts mechanical stirring to add the blast aeration mode, and pH controls 7.8～8.2, and be 14～34 hours working time; Aeration employing gas blower (or air compressor machine) and efficient microporous diffuser make and are in the high-solubility oxygen state in the reactor.In the aerobic processes, can control the interior DO of reactor is 4～5mg/L.
D. enter the anoxic section after aerobic processes is finished, adopt mechanical stirring, pH controls 7.8～8.2, and be 0～22 hour working time; In the anoxic process, can control the interior DO (dissolved oxygen) of reactor is 0～0.5mg/L.
E. leave standstill water outlet in 2 hours after the anoxic process is finished.The COD of water outlet this moment is 200～1265mg/L, and TN is 40～188mg/L, NH
3Be 8～12mg/L, wherein NH
3Reached emission standard.The clearance of COD is that the clearance of 45～90%, TN is 45～80% in the morpholine waste water.
Water quality treatment is the waste water that certain Group Co.,Ltd's morpholine production process produces, add an amount of common sludge treatment plant mud or simulation sanitary wastewater (glucose, ammonium sulfate and the preparation of micronutrient salt), wherein morpholine, N-methylmorpholine and N (2-hydroxyethyl) morpholine accounts for 35%～60 quality % of total organic matter.Dilute according to different requirement of experiment during use.The total useful volume 6L of reactor, the bottom is equipped with the micro-pore aeration plate, carries out aeration by air compressor machine, and under meter plays the control flow, sees also Fig. 1.Carry out the degraded of morpholine waste water according to the method described above, DO is at 0～0.5mg/L in the anoxic stage control reactor, and reactor pH maintains between 7.8～8.2 all the time.Temperature is about 25 ℃, and composite flora concentration is about 2～6g/L.
Present method biochemistry, nitrated and denitrification carry out in identical aerobic condition and same reactive system simultaneously, reduce investment cost and running cost greatly.
The operation of table 1, embodiment 1-8 and detect parameters
Continuous table
Claims (7)
1. the method for an efficient degradation morpholine waste water comprises the steps:
A. adopt the sbr reactor device, be equipped with composite flora and mud in the reactor, described composite flora is by the Ford bacterium WXZ-9(Delftia tsuruhatensis of Dell) CGMCC No.1797 and comamonas WXZ-17(Comamonas sp.) CGMCC No.3048 forms, mix, temperature of reaction remains on 20～30 ℃;
B. morpholine waste water is added in the reactor, adopt mechanical stirring, the anoxic operation, pH controls 7.8～8.2, and be 6～48 hours working time;
C. enter aerobic section by the anoxic section, adopt mechanical stirring to add blast aeration, pH controls 7.8～8.2, and be 14～34 hours working time;
D. enter the anoxic section by aerobic section, adopt mechanical stirring, the anoxic operation, pH controls 7.8～8.2, and be 0～22 hour working time;
E. leave standstill water outlet in 2 hours after the anoxic process is finished.
2. the method for efficient degradation morpholine waste water according to claim 1, it is characterized in that: the COD of described morpholine waste water is 1000～3300mg/L, TN is 130～570mg/L.
3. the method for efficient degradation morpholine waste water according to claim 1, it is characterized in that: in the described composite flora, the mass ratio of the Ford bacterium WXZ-9CGMCC No.1797 of Dell and comamonas WXZ-17CGMCC No.3048 is 1:1; The quality of described composite flora be in the described mud dry substance matter quality 10～40%.
4. the method for efficient degradation morpholine waste water according to claim 3 is characterized in that: after morpholine waste water added reactor, the concentration of mud was 2～6g/L in the reactor.
5. the method for efficient degradation morpholine waste water according to claim 1 is characterized in that: in step b and the steps d anoxic process, dissolved oxygen is 0～0.5mg/L in the control reactor.
6. the method for efficient degradation morpholine waste water according to claim 1 is characterized in that: in the step c aerobic processes, dissolved oxygen is 4～5mg/L in the control reactor.
7. the method for efficient degradation morpholine waste water according to claim 1, it is characterized in that: the COD of described water outlet is 200～1265mg/L, TN is 40～188mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110331401 CN102432100B (en) | 2011-10-27 | 2011-10-27 | Method for efficiently degrading morpholine waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110331401 CN102432100B (en) | 2011-10-27 | 2011-10-27 | Method for efficiently degrading morpholine waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102432100A CN102432100A (en) | 2012-05-02 |
| CN102432100B true CN102432100B (en) | 2013-08-14 |
Family
ID=45980510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110331401 Expired - Fee Related CN102432100B (en) | 2011-10-27 | 2011-10-27 | Method for efficiently degrading morpholine waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102432100B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107098513B (en) * | 2017-04-28 | 2021-01-01 | 浙江奇彩环境科技股份有限公司 | Method for treating high-concentration morpholine wastewater |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302770A (en) * | 2001-02-27 | 2001-07-11 | 机械工业部机械科学研究院环境保护技术与装备研究所 | Multi-stage anaerobic-aerobic process for treating sewage |
| CN1450004A (en) * | 2003-05-15 | 2003-10-22 | 广州大学 | Method for synchronous nitration/denitration treating urban waste water by sequence batch reactor (SBR) biological membrane process |
| CN101016523A (en) * | 2006-10-13 | 2007-08-15 | 北京工商大学 | Testosterone coma monad with aerobic denitrifying capability and method of treating waste water by the same |
| CN101016524A (en) * | 2006-10-13 | 2007-08-15 | 北京工商大学 | Pseudomonas putida with aerobic denitrifying capability and method of treating waste water by the same |
| CN101016525A (en) * | 2006-10-13 | 2007-08-15 | 北京工商大学 | Delftia with aerobic denitrifying capability and method of treating waste water by the same |
| EP2125640A1 (en) * | 2007-02-20 | 2009-12-02 | Natural Environment Research Council | Bioremediation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3125628B2 (en) * | 1995-06-13 | 2001-01-22 | 日立プラント建設株式会社 | Wastewater treatment method |
-
2011
- 2011-10-27 CN CN 201110331401 patent/CN102432100B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302770A (en) * | 2001-02-27 | 2001-07-11 | 机械工业部机械科学研究院环境保护技术与装备研究所 | Multi-stage anaerobic-aerobic process for treating sewage |
| CN1450004A (en) * | 2003-05-15 | 2003-10-22 | 广州大学 | Method for synchronous nitration/denitration treating urban waste water by sequence batch reactor (SBR) biological membrane process |
| CN101016523A (en) * | 2006-10-13 | 2007-08-15 | 北京工商大学 | Testosterone coma monad with aerobic denitrifying capability and method of treating waste water by the same |
| CN101016524A (en) * | 2006-10-13 | 2007-08-15 | 北京工商大学 | Pseudomonas putida with aerobic denitrifying capability and method of treating waste water by the same |
| CN101016525A (en) * | 2006-10-13 | 2007-08-15 | 北京工商大学 | Delftia with aerobic denitrifying capability and method of treating waste water by the same |
| EP2125640A1 (en) * | 2007-02-20 | 2009-12-02 | Natural Environment Research Council | Bioremediation |
Non-Patent Citations (9)
| Title |
|---|
| Biodegradation of Aniline by a Newly Isolated Delftia sp. XYJ6;Chengbin XIAO,Jun NING, Hai YAN,et al;《Chinese Journal of Chemical Engineering》;20090630;第17卷(第3期);第500-505页 * |
| Characterization of efficient aerobic denitrifiers isolated from two different sequencing batch reactors by 16S-rRNA analysis;Ping Wang,Xiuting Li, Mufei Xiang,et al;《Journal of Bioscience and Bioengineering》;20070630;第103卷(第6期);第563-567页 * |
| Chengbin XIAO,Jun NING, Hai YAN,et al.Biodegradation of Aniline by a Newly Isolated Delftia sp. XYJ6.《Chinese Journal of Chemical Engineering》.2009,第17卷(第3期), |
| JP特开平9-1184A 1997.01.07 |
| Ping Wang,Xiuting Li, Mufei Xiang,et al.Characterization of efficient aerobic denitrifiers isolated from two different sequencing batch reactors by 16S-rRNA analysis.《Journal of Bioscience and Bioengineering》.2007,第103卷(第6期), |
| SBR动力学模型的研究及其在明胶废水处理中的应用;李姜华;《中国优秀硕士学位论文全文数据库(工程科技Ⅰ辑)》;20070115(第1期);第7页第2.1小节，第50页表4.3和第51页图4.5 * |
| 从不同反应器筛选、鉴别好氧反硝化菌;汪苹,项慕飞,翟茜;《环境科学研究》;20070730;第20卷(第4期);摘要、第123页表3和第124页表4 * |
| 李姜华.SBR动力学模型的研究及其在明胶废水处理中的应用.《中国优秀硕士学位论文全文数据库(工程科技Ⅰ辑)》.2007,(第1期), |
| 汪苹,项慕飞,翟茜.从不同反应器筛选、鉴别好氧反硝化菌.《环境科学研究》.2007,第20卷(第4期), |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102432100A (en) | 2012-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Rahimi et al. | Technologies for biological removal and recovery of nitrogen from wastewater | |
| Chang et al. | Nitrogen removal from wastewater via simultaneous nitrification and denitrification using a biological folded non-aerated filter | |
| Yang et al. | Isolation and nitrogen removal characteristics of an aerobic heterotrophic nitrifying–denitrifying bacterium, Bacillus subtilis A1 | |
| Peng et al. | Treatment of nitrate-contaminated groundwater by heterotrophic denitrification coupled with electro-autotrophic denitrifying packed bed reactor | |
| Xiang et al. | Functional microorganisms and enzymes related nitrogen cycle in the biofilm performing simultaneous nitrification and denitrification | |
| Ding et al. | Biological treatment of actual petrochemical wastewater using anaerobic/anoxic/oxic process and the microbial diversity analysis | |
| CN102041291B (en) | Method for screening denitrifying bacterium | |
| CN105645710B (en) | A kind of method that mud decrement is carried out using complex microorganism preparations | |
| CN101484394A (en) | A method for removing the contamination of c, n utilizing heterotrophic ammonia-oxidizing bacteria | |
| KR20190003816A (en) | Systems and Methods for Reducing Sludges produced by Wastewater Treatment Facilities | |
| Wang et al. | Enhanced nitrogen removal in partial nitrification-anammox (PNA) suspended sludge system for real municipal wastewater treatment at extremely low carbon to nitrogen ratio | |
| Li et al. | Achieving efficient nitrogen removal in a single-stage partial nitrification-anammox-partial denitrification (PN/A/PD) membrane aerated biofilm reactor (MABR) | |
| Torres-Franco et al. | Assessment of the performance of an anoxic-aerobic microalgal-bacterial system treating digestate | |
| Tao et al. | A novel filter-type constructed wetland for secondary effluent treatment: Performance and its microbial mechanism | |
| Yang et al. | Improvement in nitrogen removal and changes in community structure in a sequencing batch reactor bioaugmented with P. stutzeri strain XL-2 | |
| Cho et al. | Effect of aerobic microbes' competition for oxygen on nitrogen removal in mainstream nitritation-anammox systems. | |
| Zhang et al. | Combining a novel biofilm reactor with a constructed wetland for rural, decentralized wastewater treatment | |
| Xu et al. | Effect of plant-self debris on nitrogen removal, transformation and microbial community in mesocosm constructed wetlands planted with Myriophyllum aquaticum | |
| Tan et al. | Enhanced treatment of low C/N ratio rural sewage by a modified multi-stage tidal flow constructed wetland at low temperature: Quantitative contributions of key functional genera | |
| CN103045578A (en) | Preparation method of composite bacterial agent of ammonia oxidation bacteria | |
| CN100417604C (en) | Fully biological treatment of wastewater of nitrobenzol or aniline or their mixture | |
| Zhang et al. | Nitrite production mechanism and microbial evolution characteristic influenced by pH during partial denitrification (PD) process | |
| Chen et al. | Influence of C/S ratios on nitrogen removal and microbial community on mixotrophic DEAMOX process | |
| Chang et al. | Denitrification performance and mechanism of a novel sulfur-based fiber carrier fixed-bed reactor: Co-existence of sulfur-based autotrophic denitrification and endogenous denitrification | |
| CN102432100B (en) | Method for efficiently degrading morpholine waste water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20131027 |