碳源类型及进水量分配对CMICAO工艺脱氮除磷的影响
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摘要
研究了分别以葡萄糖和乙酸钠为碳源时多点交替进水阶式A2/O(CMICAO)工艺氮磷的去除效果,以及在不同进水C/N比时各进水量分配对脱氮除磷效果的影响。结果表明,在相同的进水COD浓度下,乙酸钠比葡萄糖更适合作为碳源,更能提高脱氮除磷效率。以葡萄糖为碳源时,COD为200 mg/L、C/N比为5、缺氧池与厌氧池进水配比为1∶2时,出水COD、TN、氨氮和TP浓度分别为28.5、10.8、2.1和0.5 mg/L,均达到国家一级A排放标准。若采用葡萄糖作为碳源,投加量以使进水C/N比为5～7.5为宜,外加碳源时缺氧池与厌氧池进水分配比可统一采用1∶1。
Effects of glucose and sodium acetate as carbon source on nitrogen and phosphorus removal efficiency were researched for CMICAO process.The influence of water distribution with different carbon/nitrogen(C/N) ratios on the system performances was investigated.Higher nitrogen and phosphorus removal efficiency was achieved when sodium acetate was as carbon source instead of glucose.When using glucose as carbon source and COD was 200 mg/L,C/N ratio was 5 and water distribution of anoxic tank and anaerobic tank was 1∶ 2,effluent concentrations of COD,TN,NH4+-N and TP were 28.5,10.8,2.1 and 0.5 mg/L,respectively,meeting the Grade A Standard.When using glucose as carbon source,C/N ratio should be controlled between 5～7.5 and water distribution of anoxic tank and anaerobic tank can be kept at 1∶ 1.
Effects of glucose and sodium acetate as carbon source on nitrogen and phosphorus removal efficiency were researched for CMICAO process.The influence of water distribution with different carbon/nitrogen(C/N) ratios on the system performances was investigated.Higher nitrogen and phosphorus removal efficiency was achieved when sodium acetate was as carbon source instead of glucose.When using glucose as carbon source and COD was 200 mg/L,C/N ratio was 5 and water distribution of anoxic tank and anaerobic tank was 1∶ 2,effluent concentrations of COD,TN,NH4+-N and TP were 28.5,10.8,2.1 and 0.5 mg/L,respectively,meeting the Grade A Standard.When using glucose as carbon source,C/N ratio should be controlled between 5～7.5 and water distribution of anoxic tank and anaerobic tank can be kept at 1∶ 1.
引文
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[3]侯红娟,王洪洋,周琪.进水COD浓度及C/N值对脱氮效果的影响.中国给水排水,2005,21(12):19-23Hou Hongjuan,Wang Hongyang,Zhou Qi.The effect ofCOD in influent and C/N on nitrogen removal.China Wa-ter&Wastewater,2005,21(12):19-23(in Chinese)
[4]Vocks M.,Adam C.,Lesjean B.,et al.Enhanced post-denitrification without addition of an external carbon sourcein membrane bioreactor.Water Research,2005,39(14):3360-3368
[5]窦月芹,吕锡武,徐洪斌.六箱一体式反应器水力流态及其脱氮除磷性能.水处理技术,2007,33(2):60-63Dou Yueqin,LüXiwu,Xu Hongbin.Water flowpatternand biological removal of nitrogen and phosphorus in inte-grative six tanks activated sludge reactor.Technology ofWater Treatment,2007,33(2):60-63(in Chinese)
[6]国家环境保护局.水和废水监测分析方法(第4版).北京:中国环境科学出版社,2002
[7]Kuba T.Phosphorus and nitrogen removal with minimalCOD requirement by integration of denitrifying dephos-phatation and nitrification in a two-sludge system.WaterResearch,1996,30(7):1702-1710
[8]曹桂萍.反硝化聚磷菌富集条件的研究.中国给水排水,2010,26(13):60-63Cao Guiping.Study on enrichment conditions of denitrifyingphosphorus accumulating bacteria.China Water&Wastewater,2010,26(13):60-63(in Chinese)
[9]Adrian O.,Teresa V.M.,Lu H.B.,et al.The effect ofpH on the competition between polyphosphate-accumulatingorganisms and glycogen-accumulating organisms.WaterResearch,2005,39(15):3727-3737
[10]Carucci A.,Lindrea K.,Majone M.,et al.Different mech-anisms for the anaerobic storage of organic substrates andtheir effect on enhanced biological phosphate removal(EB-PR).Water Science and Technology,1999,39(6):21-28
[11]Adrian O.,Aaron M.S.,Vives M.T.,et al.Competi-tion between polyphosphate and glycogen accumulating or-ganisms in enhanced biological phosphorus removal sys-tems with acetate and propionate as carbon sources.Jour-nal of Biotechnology,2008,12(3):22-32
[12]Damir B.,Mark C.,Van Loosdrecht M.,et al.Innova-tive methods for sludge characterization in biological phos-phorus removal systems.Water Science and Technology,1999,39(6):37-43
[13]Yan Z.,Maite P.,Raymond J.Z.,et al.Couldpolyphosphate-accumulating organisms(PAOs)be glyco-gen-accumulating organisms(GAOs).Water Research,2008,42(10-11):2361-2368
[14]Carlos M.L.,Christine M.H.,Damir B.,et al.Fac-tors affecting the microbial populations at full-scale en-hanced biological phosphorus removal(EBPR)wastewatertreatment plants in The Netherlands.Water Research,2008,42(10-11):2349-2360
[15]郝王娟,薛涛,黄霞.进水磷碳比对聚磷菌与聚糖菌竞争生长的影响.中国给水排水,2007,23(17):95-98Hao Wangjuan,Xue Tao,Huang Xia.Effect of effluentP/C ratio on competition between phosphate-and glyco-gen-accumulating organisms.China Water&Wastewater,2007,23(17):95-98(in Chinese)
[16]Toshifumi O.,Kosuke S.,Sachiko Y.,et al.Effects ofcarbon source on denitrification efficiency and microbialcommunity structure in a saline wastewater treatmentprocess.Water Research,2008,42(14):3709-3178
[17]侯红勋,王淑莹,闫骏,等.不同碳源类型对生物除磷过程释放磷的影响.化工学报,2007,58(8):2081-2086Hou Hongxun,Wang Shuying,Yan Jun,et al.Effect ofdifferent types carbon sources on phosphorus release in en-hanced biological phosphorus removal process.Journal ofChemical Industry and Engineering,2007,58(8):2081-2086(in Chinese)