A~2O-BAF工艺反硝化聚磷效果的影响因素
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摘要
为了提高系统的反硝化除磷脱氮效率,采用静态试验考察了厌氧反应时间和厌氧段COD对A2O-BAF工艺反硝化聚磷效果的影响,同时对缺氧阶段反硝化聚磷量与脱氮量之间的关系进行了探讨.试验结果发现,在试验范围内,随着厌氧反应时间和厌氧段COD的增加,厌氧释磷量均增加,反硝化聚磷量,净聚磷量和硝氮去除量亦都随之增加,但是反硝化聚磷量与释磷量的比值基本维持不变.在2组8个不同的试验条件下,缺氧段反硝化聚磷量和脱氮量之间均呈现出良好的线性关系,系数为1.007~1.053,R2为0.992~0.997,反映了A2O-BAF系统中污泥的固有特性.
The effects of anaerobic reaction time and COD concentration on denitrifying phosphorus removal efficiency of A2O-BAF process were studied in parallel batch experiments, at the same time the relationship between denitrifying phosphorus uptake amount and nitrate consumption was investigated in anoxic condition. The results found that as anaerobic reaction time from 30 min to 120 min and COD concentration from 50mg/L to 200mg/L increased, phosphorus release amount, denitrifying phosphorus uptake amount, net phosphorus uptake amount and nitrate removal amount increased, but the ratio of denitrifying phosphorus uptake amount and release amount remained almost unchanged. In the all tests, a good linear relationship between denitrifying phosphorus uptake amount and nitrate consumption was presented in anoxic condition, with the linear coefficient and correlation coefficient ranging from 1.007 to 1.053 and 0.992 to 0.997 respectively, which showed the sludge intrinsic characteristics in the anaerobic/anoxic/aerobic process with biological aerated filter(A2O-BAF) denitrifying phosphorus removal system.
The effects of anaerobic reaction time and COD concentration on denitrifying phosphorus removal efficiency of A2O-BAF process were studied in parallel batch experiments, at the same time the relationship between denitrifying phosphorus uptake amount and nitrate consumption was investigated in anoxic condition. The results found that as anaerobic reaction time from 30 min to 120 min and COD concentration from 50mg/L to 200mg/L increased, phosphorus release amount, denitrifying phosphorus uptake amount, net phosphorus uptake amount and nitrate removal amount increased, but the ratio of denitrifying phosphorus uptake amount and release amount remained almost unchanged. In the all tests, a good linear relationship between denitrifying phosphorus uptake amount and nitrate consumption was presented in anoxic condition, with the linear coefficient and correlation coefficient ranging from 1.007 to 1.053 and 0.992 to 0.997 respectively, which showed the sludge intrinsic characteristics in the anaerobic/anoxic/aerobic process with biological aerated filter(A2O-BAF) denitrifying phosphorus removal system.
引文
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[28]Chen Y,Peng C,Wang J,et al.Effect of nitrate recycling ratio on simultaneous biological nutrient removal in a novel anaerobic/anoxic/oxic(A2O)-biological aerated filter(BAF)system[J].Bioresource technology,2011,102(10):5722-5727.
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[30]Wentzel M C,Lotter L H,Ekama G A,et al.Evaluation of biochemical models for biological excess phosphorus removal[J].Water Science and Technology,1991,(23):567-576.
[31]季民,胡振苓.活性污泥法数学模型的研究与应用[J].中国给水排水,2001,17(8):18-22.
[32]Zhang W,Peng Y,Ren N,et al.Improvement of nutrient removal by optimizing the volume ratio of anoxic to aerobic zone in AAO-BAF system[J].Chemosphere,2013,93(11):2859-2863.
[33]李亚峰,王欣,高颖.有机物,亚硝酸盐和p H值对反硝化脱氮除磷的影响[J].沈阳建筑大学学报(自然科学版),2013,29(3):531-537.
[34]陈永志,彭永臻,王建华,等.内循环对A2/O-曝气生物滤池工艺脱氮除磷特性影响[J].环境科学,2011,32(1):193-198.
[35]Kerrn-Jespersen J P,Henze M,et al.Biological phosphorus uptake under anoxic and aerobic conditions[J].Water Res.,1993,27(4):617-624.
[2]Dubber D,Gray N F.The effect of anoxia and anaerobia on ciliate community in biological nutrient removal systems using Laboratory scale sequencing batch reactors(SBRs)[J].Water Research,2011,45(6):2213-2226.
[3]张杰,臧景红,杨宏,等.A2/O工艺的固有缺欠和对策研究[J].给水排水,2003,129(13):22-26.
[4]Karakashev D,Schmidt J E,Angelidaki I.Innovative process scheme for removal of organic matter,phosphorus and nitrogen from pig manure[J].Water Res.,2008,42:4083-4090.
[5]Schmidt I,Bock E.Anaerobic ammonia oxidation with nitrogen dioxide by Nitrosomonas eutropha[J].Arch.Microbiol.,1997,167:106-111.
[6]You S J,Hsu C L,Chuang S H,et al.Nitrification efficiency and nitrifying bacteria abundance in combined AS-RBC and A2O systems[J].Water Res.,2003,37(10):2281-2290.
[7]Wang Jian hua,Peng Yong zhen,Chen Yong zhi.Advanced Nitrogen and Phosphorus Removal in A2O-BAF System Treating Low Carbon and Nitrogen Ratio Domestic Wastewater[J].Frontiers of Environmental Science and Engineering in china,2011,5(3):474-480.
[8]张杰,刘婧,李相昆,等.新型双污泥反硝化除磷工艺的初步研究[J].黑龙江大学自然科学学报,2008,25(1):1-5.
[9]Kuba T,Van Loosdrecht M C M,Heijnen J J.Phosphorus and nitrogen removal with minimal COD requirement by integration of denitrifying dephosphatation and nitrification in a two-sludge system[J].Wat.Res.,1996,30(7):1702-1710.
[10]Zhou Y,Pijuan M,Yuan Z G.Development of a 2-sludge,3-stage system for nitrogen and phosphorous removal from nutrient-rich wastewater using granular sludge and biofilms[J].Water Res.,2008,42(12):3207-3217.
[11]Zeng R J,Lemaire R,Yuan Z,et al.Simultaneous nitrification,denitrification,and phosphorus removal in a lab-scale sequencing batch reactor[J].Biotechnol Bioeng,2003,84(2):170-178.
[12]Jens Peter,Keren-Jespersen,Mogens Henze,et al.Biological phosphorus release and uptake under alternation anaerobic and anoxic conditions in a fixed-film reactor[J].Wat.Res.,1993,27(4):617-624.
[13]王春英,隋军,赵庆良.反硝化聚磷机理试验[J].环境污染治理技术与设备,2002,3(6):65-68.
[14]Henze M,Gujer W,Mino T,et al.Activated sludge model no2d[J].Wat.Sci.Tech.,1999,39(1):165-182.
[15]Wachtmeister A,Kuba T,van Loosdrecht M C M,et al.A sludge characterization assay for aerobic and denitrifying phosphorus removing sludge[J].Wat.Res.,1997,31(3):471-478.
[16]Meinhold J,Filipe C D M,Daigger G T,et al.Characterization of the denitrifying fraction of phosphate accumulating organisms in biological phosphate removal[J].Wat.Sci.Tech.,1999,39(1):31-42.
[17]史静,吕锡武.厌氧释磷量和温度对反硝化聚磷的影响[J].化工学报,2010,61(1):166-171.
[18]张小玲,张立卿,袁林江,等.硝酸盐浓度对反硝化聚磷菌诱导的影响[J].中国给水排水,2006,22(13):105-108.
[19]李勇智,彭永臻,张艳萍,等.硝酸盐浓度及投加方式对反硝化除磷的影响[J].环境污染与防治,2003,25(6):323-325.
[20]丁彩娟,吉芳英,高小平,等.A/ASBR中PHB转化与反硝化吸磷的关系研究[J].重庆建筑大学学报,2005,27(3):80-84.
[21]田淑媛,王景峰,杨睿,等.厌氧下的PHB和聚磷酸盐及其生化机理研究[J].中国给水排水,2000,16(7):5-7.
[22]Kuba T,Van Loosdrecht M C M,Heijnen J J.Biological dephosphatation by activated sludge under denitrifying conditions:p H influence and occurrence of denitrifying dephosphatation in a full-scale wastewater treatment plant[J].Wat.Sci.Tech.,1997,36(12):75-82.
[23]Smolders G J F,van der Meij J,van Loosdrecht M C M,et al.Stoichiometric model of the aerobic metabolism of the biological phosphorus removal process[J].Biotechnol.Bioeng.,1994,44(7):837-848.
[24]郭劲松,黄天寅,龙腾锐.生物脱氮除磷工艺中的微生物及其相互关系[J].环境污染治理技术与设备,2000,1(1):8-15.
[25]Sorm R,Bortone G.Phosphate uptake under anoxic conditions and fixed-film nitrification in nutrient removal activated sludge system[J].Wat Res,1996,3(7):1573-1584.
[26]Wachtmeister A,Kuba T.A sludge characterization assay for aerobic and denitrifying phosphorus removing sludge[J].Wat Res,1997,31(3):471-478.
[27]张为堂,侯锋,刘青松,等.HRT和曝气量对AAO-BAF系统反硝化除磷性能的影响[J].化工学报,2013,65(4).
[28]Chen Y,Peng C,Wang J,et al.Effect of nitrate recycling ratio on simultaneous biological nutrient removal in a novel anaerobic/anoxic/oxic(A2O)-biological aerated filter(BAF)system[J].Bioresource technology,2011,102(10):5722-5727.
[29]孙培德,王如意.全耦合活性污泥模型(FCASM3)Ⅰ:建模机理及数学表征[J].环境科学学报,2008,28(12):2404-2419.
[30]Wentzel M C,Lotter L H,Ekama G A,et al.Evaluation of biochemical models for biological excess phosphorus removal[J].Water Science and Technology,1991,(23):567-576.
[31]季民,胡振苓.活性污泥法数学模型的研究与应用[J].中国给水排水,2001,17(8):18-22.
[32]Zhang W,Peng Y,Ren N,et al.Improvement of nutrient removal by optimizing the volume ratio of anoxic to aerobic zone in AAO-BAF system[J].Chemosphere,2013,93(11):2859-2863.
[33]李亚峰,王欣,高颖.有机物,亚硝酸盐和p H值对反硝化脱氮除磷的影响[J].沈阳建筑大学学报(自然科学版),2013,29(3):531-537.
[34]陈永志,彭永臻,王建华,等.内循环对A2/O-曝气生物滤池工艺脱氮除磷特性影响[J].环境科学,2011,32(1):193-198.
[35]Kerrn-Jespersen J P,Henze M,et al.Biological phosphorus uptake under anoxic and aerobic conditions[J].Water Res.,1993,27(4):617-624.