滨海河道型复合湿地冬季脱氮除磷效果研究
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2020-03-21 11:41:52
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第29卷1期2016年2月城市环境与城市生态URBANENVIR0NMENT&URBANEC0L0GYV01.29No.1Feb.201635袁敏,廖光龙,孙静,等.滨海河道型复合湿地冬季脱氮除磷效果研究[J].城市环境与城市生态,2016,29(1):35—38.YUANMin,LIAOGuang-long,SUNJing,et.DenitrificationandPhosphorusRemovalEffectofCoastalWatercourseWetlandinWinter[J]UrbanEnvironment&UrbanEcology,2016,29(1):35-38.滨海河道型复合湿地冬季脱氮除磷效果研究袁敏,廖光龙,孙静,高郁杰,刘红磊,常文韬,闫佩(天津市环境保护科学研究院,天津300191)摘要:为了探讨冬季滨海湿地对污水处理厂出水净化的效果,在2013年冬季12月份一次年2月份对天津泰达河道型复合湿地进行4次采样监测,结果表明当水温>5℃时,河道型复合湿地脱氮除磷效果良好,湿地出水总氮浓度≤2mg/L,总氮去除率均维持在85%以上,总磷浓度≤0.105mg/L,总磷去除率均维持在89%以上;当水温<1℃时,湿地出水总氮浓度为5.97mgCL,总氮去除率下降至50.66%,总磷浓度为0.3mgCL,总磷去除率下降至16.67%,可见湿地系统在冬季随着水温的下降(从>5℃下降至I~C以下)脱氮除磷效果呈现出一定的波动,但当水温逐渐上升时,湿地脱氮除磷潜能将很快恢复。河道型复合湿地沿程污水中总含盐量呈现出累积现象,出水口增幅为1.28~2.08倍,含盐量的累积将成为滨海盐碱地区开展湿地工程建设的一个瓶颈。关键词:冬季:河道型复合湿地;脱氮除磷;总含盐量中图分类号:X505文献标识码:ADenitrificationandPhosphorusRemoval文章编号:160088(原1002—1264)(2016)01—0035—04EffectofCoastalWatercourseWetlandinWinterYUANMin,LIAOGuang-long,SUNJing,GAOYudie,LIUHong—lei,CHANGWen—tao,YANPei(TianiinAcademyofEnvironmentalScience,Tianjin300191,China)Abstract:Tostudythe(advanced)purificationeffectofthesecondarily.treatedeffluentfromthelocalwastewatertreatmentplantbycoastalwetland,thesamplesfromTianjinTEDA(TianjinEconomic—TechnologicalDevelopmentArea)watercoursewetlandweremonitoredforfourtimesfromDecember2013toFebruary2014.Theresultshowedthatwhenthewatertemperaturewashigherthan5~C,thedenitrificationandphosphorusremovaleffectwasgoodinthewate:rcoursewetland.Thetotalnitrogenconcentrationinthewetlandeffluentwaslowerthanorequalto2mg/L,andthetotalnitrogenremovalratewasmaintainedabove85%.Thetotalphosphorusconcentrationwaslowerthanorequalto0.105m地andthetotalphosphorusremovalratewasmaintainedabove89%.Whenthewatertemperaturewaslowerthan1qC.thetotalnitrogenconcentrationwas5.97mg/L。andthetotalnitrogenremovalratedecreasedto50.66%.Thetotalphosphorusconcentrationwas0.3mg/L,andthetotalphosphorusremovalratedroppedto16.67%.Althoughtheremovaleffectofnitrogenandphosphorusofwatercoursewetlandshowedacertaindegreeoffluctuationwiththedecreaseofwatert
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