PVA填料对低温生活污水生物脱氮的影响
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摘要
为解决北方冬季寒冷天气条件下,生活污水脱氮难的问题,通过模拟CASS工艺中投加聚乙烯醇(PVA)凝胶球填料的方法对低温生活污水进行处理.实验确定的最佳运行条件为:曝气时间2h,回流比300%,连续进水量5L,搅拌速度2r/s.在上述最佳处理条件下,未投加PVA凝胶球时氨氮去除率约为15%,投加PVA凝胶球后氨氮去除率约为65%.实验结果证明PVA凝胶球填料可以有效提高生活污水氨氮的去除率,解决低温生活污水生物脱氮难的问题.
The method of simulated CASS process with polyvinyl alcohol(PVA)gel ball packing is used to solve the difficult problem of nitrogen removal from domestic sewage in cold winter in the north.The optimal operating conditions are as follows:the aeration time is 2 h,the reflux ratio 300%,the continuous influent 5 L,and the stirring speed 2 r/s.Under the above treatment conditions,the removal rate of ammonia nitrogen is about 15% without the PVA gel ball the removal rate of ammonia nitrogen is about 65% with PVA gel ball.The experimental results show that PVA gel ball filler can effectively improve the removal rate of ammonia nitrogen in domestic sewage and solve the problem of biological nitrogen removal in low tempera-ture domestic sewage.
The method of simulated CASS process with polyvinyl alcohol(PVA)gel ball packing is used to solve the difficult problem of nitrogen removal from domestic sewage in cold winter in the north.The optimal operating conditions are as follows:the aeration time is 2 h,the reflux ratio 300%,the continuous influent 5 L,and the stirring speed 2 r/s.Under the above treatment conditions,the removal rate of ammonia nitrogen is about 15% without the PVA gel ball the removal rate of ammonia nitrogen is about 65% with PVA gel ball.The experimental results show that PVA gel ball filler can effectively improve the removal rate of ammonia nitrogen in domestic sewage and solve the problem of biological nitrogen removal in low tempera-ture domestic sewage.
引文
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[17]端正花,潘留明,陈晓欧,等.低温下活性污泥膨胀的微生物群落结构研究[J].环境科学,2016,37(3):1070-1074.DUAN Z H,PAN L M,CHEN X O,et al.Changes of microbial community structure in activated sludge bulking at low temperature[J].Environmental Science,2016,37(3):1070-1074.
[2]宋卫锋,骆定法,王孝武,等.折点氯化法处理高NH3-N含钴废水试验与工程实践[J].环境工程,2006,24(5):12-13.SONG W F,LUO D F,WANG X W,et al.Test and project practice on treatment of high NH3-N and Co containing wastewater with break point chlorination[J].Environmental Engineering,2006,24(5):12-13.
[3]孙委.炼油厂污水汽提装置结构原因分析与对策[J].石油与天然气化工,2016,45(6):112-116.SUN W.Cause analysis and countermeasures for refinery sewage water stripping unit scaling[J].Chemical Engineering of Oil&Gas,2016,45(6):112-116.
[4]李明,施晓亮,颜恒亮.城市污水生物法处理方法的应用探讨[J].环境与可持续发展,2016,41(3):110-111.LI M,SHI X L,YAN H L.Discussion on biological methods of urban sewage treatment[J].Environment and Sustainable Development,2016,41(3):110-111.
[5]思宇,张建民,张涛,等.改性沸石对水中氨氮去除效果[J].西安工程大学学报,2014,28(3):329-332.SI Y,ZHANG J M,ZHANG T.Experimental study on the modification of natural zeolite and its removal of ammonia nitrogen from water[J].Journal of Xi′an Polytechnic University,2014,28(3):329-332.
[6]杨赛飞,张建民,崔心水.微生物燃料电池阳极氨氮去除的影响因素[J].西安工程大学学报,2016,30(3):284-289.YANG S F,ZHANG J M,CUI X S.The factors in ammonia nitrogen removal of microbial fuel cell anode[J].Journal of Xi′an Polytechnic University,2016,30(3):284-289.
[7]张晓磊,魏亮亮,赵庆良,等.离子交换法去除城市污水处理厂二级处理出水中磷的效能及机理[J].黑龙江大学自然科学学报,2013,30(5):653-657.ZHANG X L,WEI L L,ZHAO Q L,et al.Performance and mechanism of efficient recovery of phosphorus from secondary effluent of urban wastewater treatment plant using ion exchange[J].Journal of Natural Science of Heilongjiang University,2013,30(5):653-657.
[8]王利娜,刘永红,李婷,等.PVA凝胶小球在废水生物处理工艺中的应用[J].工业用水与废水,2014,45(5):2-3.WANG L N,LIU Y H,LI T,et al.Application of PVA-gel beads in biological treatment of wastewater[J].Industrial Water&Wastewater,2014,45(5):2-3.
[9]WU L,WANG J,LIU X.Enhanced nitrogen removal under low-temperature and high-load conditions by optimization of the operating modes and control parameters in the CAST system for municipal wastewater[J].Desalination and Water Treatment,2015,53(6):1683-1698.
[10]陈波.CASS+深度处理工艺用于济宁市某污水处理厂升级改造[J].中国给水排水,2017,33(2):61-64.CHEN B.Application of CASS and advanced treatment process to upgrading and reconstruction of a wastewater treatment plant in Jining city[J].China Water&Wastewate,2017,33(2):61-64.
[11]李银波,周少奇,邱有真,等.回流比对投料A2/O工艺脱氮除磷影响的中试研究[J].环境科学与技术,2010,33(2):142-145.LI Y B,ZHOU S Q,QIU Y Z,et al.Effect of mixed-liquid return ratio on A2/O process performance[J].Environmental Science&Technology,2010,33(2):142-145.
[12]雷晓芬,朱光灿,吕锡武,等.碳源类型及进水量分配对CMICAO工艺脱氮除磷的影响[J].环境工程学报,2013,7(8):2899-2903.LEI X F,ZHU G C,LYU X W,et al.Effects of carbon sources and water distribution on nitrogen and phosphorus removal for CMICAO process[J].Chinese Journal of Environmental Engineering,2013,7(8):2899-2903.
[13]付昆明,张杰,曹相生,等.曝气量对不同填料CANON反应器运行效率的影响[J].化工学报,2010,61(2):496-503.FU K M,ZHANG J,CAO X S,et al.Effect of aeration rate on CANON reactors with different carriers[J].EIESC Journal,2010,61(2):496-503.
[14]王小菊,何春平,王震,等.高效硝化细菌的筛选及特性研究[J].中国环境科学,2013,32(2):286-292.WANG X J,HE C P,WANG Z,et al.Screening and characteristics of an efficient nitrobacterium[J].China Environmental Science,2013,32(2):286-292.
[15]陈晶,邓文,陈萍,等.反硝化细菌强化潜流湿地的污水处理厂尾水脱氮试验[J].安全与环境学报,2017,17(1):262-266.CHEN J,DENG W,CHEN P,et al.Experiment for enhancing nitrogen removal from the effluent sewage treating plant via the denitrifying bacteria in the context of subsurface flow constructed wetland[J].Journal of Safety and Environment,2017,17(1):262-266.
[16]程方,秦涛,赵现勇,等.加药量和水利搅拌速度对雨水混凝效果的影响[J].环境工程学报,2012,6(11):3095-3099.CHENG F,QIN T,ZHAO X Y,et al.Effect of coagulant dosage and hydraulic strirring speed on rainwater coagulation[J].Chinese Journal of Environmental Engineering,2012,6(11):3095-3099.
[17]端正花,潘留明,陈晓欧,等.低温下活性污泥膨胀的微生物群落结构研究[J].环境科学,2016,37(3):1070-1074.DUAN Z H,PAN L M,CHEN X O,et al.Changes of microbial community structure in activated sludge bulking at low temperature[J].Environmental Science,2016,37(3):1070-1074.