三峡库区典型临江村镇排放污水的水质水量特征分析_方芳

农业环境科学学报2009,28(8):1661-1668JournalofAgro-EnvironmentScience摘要：以重庆市石宝村镇为研究区域，通过现场采样及室内分析方法研究三峡库区典型临江村镇污水排放的水质和水量特征，对了解该类村镇污水污染状况及治理工程设计具有指导意义。结果表明，该类村镇排放的污水呈现出高氮、中磷、低有机物及低碳氮比的特征，无机态的氨氮和PO3-4-P是氮磷存在的最主要形态。1d内排放的污水流量和污水中各种污染物浓度随时间的变化在总体上趋势一致，但各时段的变化规律各有不同；不同功能日之间的污水流量和TP浓度相差较大，CODCr和TN变化不明显；由于月际间气温变化导致的用水活动变化和雨水的季节性分布，所研究的5—11月份的污水流量差异明显，主要污染物之间显现出类似的浓度变化规律，其中6、11月份的浓度明显高出监测期间内的其他月份。上述的流量和污染物浓度变化特征基本体现了三峡库区典型临江村镇居民的生活方式、作息规律及排水特点。关键词：三峡库区；临江村镇；水质水量特征中图分类号：X508文献标志码：A文章编号：1672-2043(2009)08-1661-08三峡库区典型临江村镇排放污水的水质水量特征分析方芳，王磊，郭劲松，邹建勇（重庆大学城市建设与环境工程学院，重庆400045）CharacteristicsofDomesticWastewaterQualityandQuantityDischargedfromTypicalVillagesandSmallTownsbytheRiversideinThreeGorgesReservoirRegionFANGFang,WANGLei,GUOJin-song,ZOUJian-yong（FacultyofUrbanConstructionandEnvironmentalEngineering,ChongqingUniversity,Chongqing400045,China）Abstract：TounderstandthepollutionconditionofsewagefromtypicalvillagesandsmalltownsbytheriversideinThreeGorgesReservoirandtoconductthewastewatertreatmentengineeringdesign,thecharacteristicsofdomesticwastewaterqualityandquantityfromShibaovil－lageandsmalltowninChongqingwereinvestigatedbyusingon-sitesamplingandtheexperimentalanalysisfromMaytoNovemberin2008.Theresultsshowedthatthedomesticwastewaterdischargedfromthistypeoftownshadthecharacteristicsofhighnitrogen,mediumphospho－rusandloworganicmatterconcentrationwiththelowcarbonnitrogenratio.Inorganicformsofnitrogenandphosphorusweredominant.Theflowrateandtheconcentrationsofdifferentpollutantsinthewastewaterchangedovertimewithageneralidenticaltendencyinawholeday,butthevariationsinthescaleofhoursdiffered.WastewaterflowrateandTPconcentrationshowedobviousdifferencesindifferentfunctionaldays.However,theconcentrationsofCODandTNhadnosignificantchanges.Withthevariationofwater-consumingactivitiesasaresultofthemonthlychangesoftemperatureandtheseasonaldistributionofrainwater,wastewaterflowratevariedsignificantlyinthestudyperiod（fromMaytoNovember）,andtheconcentrationsofmainpollutantsalsoexhibitedasimilarvariationtre