聚合硅酸盐混凝剂在污水深度处理中的应用研究
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摘要
通过复合法制备了几种不同金属离子配比的聚合硅酸盐混凝剂,对比了聚合硅酸盐混凝剂与常规混凝剂在处理城镇污水厂尾水时,深度除磷、除浊和去除COD_(Cr)的性能。结果表明,聚硅酸铝铁的n(Al):n(Fe)=1:1时,较其他配比的混凝剂对总磷的去除率高,而且聚硅酸铝铁(n(Al):n(Fe)=1:1)比聚硅酸镁铁(n(Mg):n(Fe)=1:1)和氯化铁的混凝效果和沉降性能均更好。在聚硅酸铝铁(n(Al):n(Fe)=1:1)投加量为60 mg/L时,总磷的质量浓度为0.96 mg/L、COD_(Cr)的质量浓度为32 mg/L的城镇污水厂尾水处理后水质可达到GB 3838—2002《地表水环境质量标准》中Ⅲ类标准。
Polysilicate coagulants with several kinds of metal irons ratios were prepared by composition.The performance of polysilicate coagulants and conventional coagulants on advanced removal of phosphorus, turbidity and CODCrwhen treating tail water of municipal sewage treatment plant were compared. The results showed that, among polysilicate aluminium ferric(n(Al): n(Fe) = 1: 1), poly ferric magniesum silicate(n(Mg): n(Fe) =1 : 1) and ferric chloride, the polysilicate aluminum ferric(n(Al) : n(Fe) = 1 : 1) could get the highest total phosphorus removal rate, and its coagulation effect and sedimentation effect were also the best. Using polysilicate aluminium ferric(n(Al) : n(Fe) = 1 : 1) to treat municipal wastewater treatment plant tail water which contains0.96 mg/L of total phosphorus and 32 mg/L of CODCr, when the coagulant dosage was 60 mg/L, the quality of the effluent water reached the requirement of grade Ⅲ in GB 3838—2002 Environmental Quality Standards for Surface Water.
Polysilicate coagulants with several kinds of metal irons ratios were prepared by composition.The performance of polysilicate coagulants and conventional coagulants on advanced removal of phosphorus, turbidity and CODCrwhen treating tail water of municipal sewage treatment plant were compared. The results showed that, among polysilicate aluminium ferric(n(Al): n(Fe) = 1: 1), poly ferric magniesum silicate(n(Mg): n(Fe) =1 : 1) and ferric chloride, the polysilicate aluminum ferric(n(Al) : n(Fe) = 1 : 1) could get the highest total phosphorus removal rate, and its coagulation effect and sedimentation effect were also the best. Using polysilicate aluminium ferric(n(Al) : n(Fe) = 1 : 1) to treat municipal wastewater treatment plant tail water which contains0.96 mg/L of total phosphorus and 32 mg/L of CODCr, when the coagulant dosage was 60 mg/L, the quality of the effluent water reached the requirement of grade Ⅲ in GB 3838—2002 Environmental Quality Standards for Surface Water.
引文
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[2]李冉,潘杰,杨江,等.聚硅酸阳离子絮凝剂处理印染废水[J].环境工程学报,2015,9(7):3259-3262.
[3]张琼,黄晓梅,李国斌,等.聚硅酸铝铁絮凝剂处理云南滇池污染水的应用研究[J].水处理技术,2015,41(2):80-84.
[4]XING H,HU X M,TIAN Y S,et al.On preparation and treating coking sewage of the polysilicate ferro-aluminum sulfate[J].Journal of Safety&Environment,2014,14(1):207-211.
[5]高宝玉,岳钦艳,王炳建.聚合硅酸铝铁絮凝剂的制备及其水解和絮凝特性[J].环境化学,2004,23(6):713-714.
[6]谢娟,王新强.聚硅酸铝铁絮凝剂处理造纸黑液研究[J].工业用水与废水,2005,36(4):24-25.
[7]金春姬,戚秀芝,佘宗莲,等.聚硅酸铝铁在草浆造纸废水深度处理中的应用[J].工业用水与废水,2007,38(5):29-31.
[8]张钢,范先媛,朱小丽,等.聚硅酸铝铁复合絮凝剂性能的研究[J].环境科学与技术,2012(8):185-188.
[9]赵会明,罗固源,季铁军.几种聚硅酸铝铁絮凝剂的性能比较[J].重庆大学学报,2008,31(6):694-697.
[10]WEI Y,DING A,DONG L,et al.Characterisation and coagulation performance of an inorganic coagulant-poly-magnesiumsilicate-chloride in treatment of simulated dyeing wastewater[J].Colloids&Surfaces A Physicochemical&Engineering Aspects,2015,470(12):137-141.
[11]王元宏,魏群山,张伟超,等.新型无机高分子混凝剂聚硅酸铝钙的制备及除浊性能的研究[J].环境工程,2015,33(S1):302-305.
[12]李琛.聚硅酸铝铁处理含铬废水的研究[J].电镀与环保.2014,34(5):46-48.
[13]唐世娟,朱维耀,宋永会,等.复合型聚合硅酸絮凝剂的制备及其除浊除磷性能研究[J].环境工程学报,2008,2(3):328-333.
[14]BAO Y G,QIN Y Y,BING J W.Properties and coagulation performance of coagulant poly-aluminum-ferric-silicate-chloride in water and wastewater treatment[J].Journal of Environmental Science&Health Part A,2006,41(7):1281-1292.
[15]郑兴灿.污水除磷脱氮技术[M].北京:中国建筑工业出版社,1998.
[16]潘理黎,王玲,郑海军,等.城镇污水处理厂尾水深度化学除磷试验研究[J].水处理技术,2011,37(6):50-53.
[17]国家环境保护总局水和废水监测分析方法.水和废水监测分析方法[M].北京:中国环境出版社,2013.
[18]时文中,李灵芝,余国忠.聚合硅酸铝铁(PSAF)的制备与絮凝性能研究[J].重庆环境科学,2003,25(4):29-32.
[19]GAO B Y,HAHN H H,HOFFMANN E.Evaluation of aluminumsilicate polymer composite as a coagulant for water treatment[J].Water Research,2002,36(14):3573-3581.
[20]冯群英.饮用水深度除磷技术研究[D].北京:北京工业大学,2007.