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1、毕业设计文献综述环境科学强化混凝法处理定海区红卫水库微污染水源水实验研究[摘要]本文概述了当前国内外混凝剂的发展状况以及我国混凝法水处理技术现状及发展,通过用强化混凝法处理微污染水源的水实验研究,对硫酸铝、硫酸铁、聚合硫酸铁为代表的混凝剂进行系统的实验,测其出水COD及氨氮值浓度及其去除率,选出适合处理红卫水库水源的单一混凝剂和投加量,通过改变混凝剂的混合速度、混合时间和PH等,确定影响混凝的影响因素和最佳条件,通过混凝剂复配,得出混凝剂的最佳配比。实验表明在硫酸铝,硫酸铁,聚丙烯酰胺三种混凝剂实验中,硫酸铝对COD和氨氮的去除效果最好,去除率分别为46%、37%,其最佳投加量
2、为9mg/L,在混合速度550r/min,混合时间30s,PH值范围控制在6.5~7.0混凝效果比较理想。在混凝剂复配实验中,硫酸铝与聚丙烯酰胺比例按60%复配混凝效果最佳,硫酸铁与聚丙烯酰胺比例按80%复配混凝效果最佳。从实验可以看出强化混凝工艺能有效提高有机物去除率,提高饮用水水质,是一种可行又经济的水处理方法。[关键词]强化混凝法;混凝剂;微污染水源;水处理SlightlypollutedsourcewaterofHongWeireservoirinDingHaiexperimentalstudybyEnhancedcoagulationmethod[Abstract]T
3、hispapersummarizesthecurrentdomesticandinternationalcoagulantdevelopmentstatusandcoagulationmethodinwatertreatmenttechnologysituationanddevelopment,throughenhancedcoagulationmethodtreatmentwiththeslightlypollutedwater,waterexperimentofalumina,ferricsulfate,polymerizationrepresentedcoagulants
4、systemicexperimentandthemeasureditsoutletCODandammonianitrogenremoval,concentrationanditsvaluetochoosethesuitableprocessingGongWeireservoirwatersinglecoagulantsanddosingquantity,throughthechangeofcoagulanthybridspeed,mixingtimeandPH,ascertainthecoagu-flocculationtheinfluencefactorsandthebest
5、condition,bycoagulants,itisconcludedthatblendswiththebestproportionofcoagulants.Experimentalresultsshowthealuminiumsulfate,PAM,threekindsofcoagulantexperiments,aluminiumandammonianitrogenofCODremovalefficiencyofbest,46percent,respectivelyforremovalof37%,itsoptimumdosingquantityfor9mg/L,in550
6、r/min,hybridspeedmixed30s,pHrangetimecontrolin6.5~7.0coagulationeffectisideal.Incoagulantblendswithexperiments,aluminiumandPAMproportionby60%blendswithbesteffect,ferricflocculationandPAMproportionto80%flocculationblendswithbesteffect.Fromtheexperimentcanseeenhancedcoagulationtechnologycaneff
7、ectivelyenhancetheorganicsremovalrateandimprovethedrinkingwaterquality,itisafeasibleandeconomicwatertreatment.[Keywords]Enhancedcoagulationmethod;Coagulants;Slightlypollutedwater;Watertreatment引言近年来,全国水污染仍呈发展趋势,工业发达地区水域污染尤为严重。7大水系和内陆河流的110个重点河段,符合“