碱度对膜生物反应器硝化过程和膜污染的影响
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摘要
采用一体化浸没式膜生物反应器处理生活污水,研究进水碱度对硝化过程和膜污染过程的影响。结果表明,碱度对膜生物反应器工艺的硝化过程影响较大;当碱度充足(224~510 mg/L)时,氨氮去除率达到98.6%,出水的p H基本稳定,当进水碱度不足时,氨氮去除率下降,出水的p H低于6,p H变化滞后于碱度的变化;进水碱度变化对COD去除影响不大,去除率稳定在91%以上;随着进水碱度下降,膜生物反应器内的胞外聚合物EPS由10 mg/g MLSS上升至26 mg/g MLSS,碱度充足时MBR运行周期最长可达10 d,当碱度不足引起反应器中的EPS浓度上升,导致膜污染加剧,膜生物反应器的运行周期下降到2 d。
The effect of the influent alkalinity on the nitrification during wastewater treatment by a submerged membrane bioreactor was investigated,and the parameters of the reactor were tested at the same time. The results showed that the alkalinity had a significant effect on the nitrification. When the alkalinity was sufficient( 224—510 mg /L),the ammonia nitrogen removal rate was over 98. 6%,and the p H was stable. While the alkalinity was insufficient,the ammonia nitrogen removal rate decreased and the effect of p H on the influent of MBR was lagged behind the alkalinity. There was little effect on the COD of the effluent,and the removal efficiency reached 91%. As the alkalinity of influent dipped,EPS increased from 10 to 26 mg / g MLSS,which caused the inverses washing cycle shorten and membrane pollution was aggravating. The inverses washing cycle was up to 10 d when the alkalinity of influent was sufficient,but decreased to 2 d while the alkalinity was insufficient.
The effect of the influent alkalinity on the nitrification during wastewater treatment by a submerged membrane bioreactor was investigated,and the parameters of the reactor were tested at the same time. The results showed that the alkalinity had a significant effect on the nitrification. When the alkalinity was sufficient( 224—510 mg /L),the ammonia nitrogen removal rate was over 98. 6%,and the p H was stable. While the alkalinity was insufficient,the ammonia nitrogen removal rate decreased and the effect of p H on the influent of MBR was lagged behind the alkalinity. There was little effect on the COD of the effluent,and the removal efficiency reached 91%. As the alkalinity of influent dipped,EPS increased from 10 to 26 mg / g MLSS,which caused the inverses washing cycle shorten and membrane pollution was aggravating. The inverses washing cycle was up to 10 d when the alkalinity of influent was sufficient,but decreased to 2 d while the alkalinity was insufficient.
引文
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[16]苏德林,王建龙,黄永恒,等.ABR反应器的碱度变化及调控研究.环境科学,2006,27(10):2024-2027Su Delin,Wang Jianlong,Huang Yongheng,et al.Variation of alkalinity and its regulation of ABR.Environmental Science,2006,27(10):2024-2027(in Chinese)
[17]杨义飞,包常华,周玲玲,等.胞外聚合物的生成特性及其对污水生物处理的影响.市政技术,2006,24(6):405-408Yang Yifei,Bao Changhua,Zhou Lingling,et al.The resultant characteristics of extra-cellular polymeric substances and its effects on sewage treatment.Municipal Engineering Technology,2006,24(6):405-408(in Chinese)
[18]Zhang Bin,Sun Baosheng,Jin Min,et al.Extraction and analysis of extracellular polymeric substances in membrane fouling in submerged MBR.Desalination,2008,227(1-3):286-294
[19]Bae T.H.,Tak T.M.Interpretation of fouling characteristics of ultrafiltration membranes during the filtration of membrane bioreactor mixed liquor.Journal of Membrane Science,2005,264(1-2):151-160
[20]Defiance L.,Jaffrin M.Y.,Gupta B.,et al.Contribution of various constituents of activated sludge to membrane bioreactor fouling.Bioresource Technology,2000,73(2):105-112
[21]刘强,王晓昌.附着性胞外多聚物对HMBR膜污染控制性能的影响.环境工程学报,2012,6(12):4395-4399Liu Qiang,Wang Xiaochang.Effect of bond extracellular polymeric substances on membrane fouling control property of a HMBR.Chinese Journal of Environmental Engineering,2012,6(12):4395-4399(in Chinese)
[2]Li Baikun,Irvin S.The comparison of alkalinity and ORP as indicators for nitrification and denitrification in a sequencing batch reactor(SBR).Biochemical Engineering Journal,2007,34(3):248-255
[3]Hou Baolin,Han Hongjun,Jia Shengyong,et al.Effect of alkalinity on nitrite accumulation in treatment of coal chemical industry wastewater using moving bed biofilm reactor.Journal of Environmental Sciences,2014,26(5):1014-1022
[4]Zhou Zhongbo,Meng Fangang,Lu Hui,et al.Simultaneous alkali supplementation and fouling mitigation in membrane bioreactors by on-line Na OH backwashing.Journal of Membrane Science,2014,457:120-127
[5]杨崇臣,田智勇,宋永会,等.膜生物反应器(MBR)处理干法腈纶废水.环境科学研究,2010,23(7):912-917Yang Chongchen,Tian Zhiyong,Song Yonghui,et al.Wastewater treatment of dry-spun acrylic fiber by membrane bioreactor.Research of Environmental Sciences,2010,23(7):912-917(in Chinese)
[6]郑育毅,刘文伟,吴春山,等.MBR提高A/O工艺污水脱氮效果的研究.福建师范大学学报(自然科学版),2010,26(2):115-118Zheng Yuyi,Liu Wenwei,Wu Chunshan,et al.Study on MBR used for improving denitrogenation by A/O process.Journal of Fujian Normal University(Natural Science Edition),2010,26(2):115-118(in Chinese)
[7]杨威,赵秋静,韩正双,等.MBR净化受污染地表水的自然启动及稳定运行除污染特性.环境工程学报,2013,7(4):1363-1367Yang Wei,Zhao Qiujing,Han Zhengshuang,et al.Pollutants removal characteristics of natural start-up and steady operation of membrane bioreactor(MBR)for treating polluted surface water.Chinese Journal of Environmental Engineering,2013,7(4):1363-1367(in Chinese)
[8]陈英文,赵冰怡,刘明庆,等.碱度指示MBR中同步硝化反硝化的研究.环境工程学报,2010,4(2):273-277Chen Yingwen,Zhao Bingyi,Liu Mingqing,et al.Study on alkalinity as indicator for simultaneous nitrification and denitrification in MBR.Chinese Journal of Environmental Engineering,2010,4(2):273-277(in Chinese)
[9]张海丰,孙宝盛,王亮,等.贫营养条件下膜生物反应器污泥混合液可滤性分析.中国环境科学,2009,29(4):368-373Zhang Haifeng,Sun Baosheng,Wang Liang,et al.Analysis of the filterability of mixed sludge under low nutrition in MBR.China Environmental Science,2009,29(4):368-373(in Chinese)
[10]Bradford M.M.A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding.Analytical Biochemistry,1976,72(1-2):248-254
[11]Du Bois M.,Gilles K.A.,Hamilton J.K.,et al.Colorimetric method for determination of sugars and related substances.Analytical Biochemistry,1956,28(3):350-356
[12]玄婉茹,单明军,郑春芳,等.p H值和碱度对生物硝化的影响.染料与化工,2012,43(3):36-38Xuan Wanru,Shan Mingjun,Zheng Chunfang,et al.Effects of p H value and alkalinity on biological nitrification.Fuel&Chemical Processes,2012,43(3):36-38(in Chinese)
[13]丁国际,刘德永,郑广宏,等.新型一体化工艺处理生活污水的影响因素研究.中北大学学报(自然科学版),2012,33(4):443-447,452Ding Guoji,Liu Deyong,Zheng Guanghong,et al.Study on factors influencing domestic waste water removal by novel integrated process.Journal of North University of China(Natural Science Edition),2012,33(4):443-447,452(in Chinese)
[14]李伟博,洪俊明.两种膜生物反应器工艺在养殖废水处理中的运行效果.化工进展,2012,31(12):2791-2796Li Weibo,Hong Junming.Study on the operational effect of dynamic membrane bioreactor and membrane bioreactor for aquaculture wastewater treatment.Chemical Industry and Engineering Progress,2012,31(12):2791-2796(in Chinese)
[15]洪俊明,尹娟,李伟博.动态膜生物反应器用于污水处理的研究进展.水处理技术,2012,38(2):1-5Hong Junming,Yin Juan,Li Weibo.Study on the dynamic membrane bioreactor for wastewater treatment.Technology of Water Treatment,2012,38(2):1-5(in Chinese)
[16]苏德林,王建龙,黄永恒,等.ABR反应器的碱度变化及调控研究.环境科学,2006,27(10):2024-2027Su Delin,Wang Jianlong,Huang Yongheng,et al.Variation of alkalinity and its regulation of ABR.Environmental Science,2006,27(10):2024-2027(in Chinese)
[17]杨义飞,包常华,周玲玲,等.胞外聚合物的生成特性及其对污水生物处理的影响.市政技术,2006,24(6):405-408Yang Yifei,Bao Changhua,Zhou Lingling,et al.The resultant characteristics of extra-cellular polymeric substances and its effects on sewage treatment.Municipal Engineering Technology,2006,24(6):405-408(in Chinese)
[18]Zhang Bin,Sun Baosheng,Jin Min,et al.Extraction and analysis of extracellular polymeric substances in membrane fouling in submerged MBR.Desalination,2008,227(1-3):286-294
[19]Bae T.H.,Tak T.M.Interpretation of fouling characteristics of ultrafiltration membranes during the filtration of membrane bioreactor mixed liquor.Journal of Membrane Science,2005,264(1-2):151-160
[20]Defiance L.,Jaffrin M.Y.,Gupta B.,et al.Contribution of various constituents of activated sludge to membrane bioreactor fouling.Bioresource Technology,2000,73(2):105-112
[21]刘强,王晓昌.附着性胞外多聚物对HMBR膜污染控制性能的影响.环境工程学报,2012,6(12):4395-4399Liu Qiang,Wang Xiaochang.Effect of bond extracellular polymeric substances on membrane fouling control property of a HMBR.Chinese Journal of Environmental Engineering,2012,6(12):4395-4399(in Chinese)