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1、普通厂房电镀废水处理毕业论文摘要电镀是当今全球三大污染工业之一。电镀废水的成分常常是同时含有多种污染物,其中有毒有害的物质有铬、镍、氰化物、铜等。本设计中废水进水水量水质为:含氰废水Q=8m3/d,平均每小时排放量1.0m3,氰化物浓度为1.03-8.5mg/L,其废水中还含有OH-和少量Cu2+离子;含铬废水Q=8m3/d,平均每小时排放量1.0m3,六价铬浓度为6.08-12.1mg/L,其废水中还含有H+离子;综合废水Q=4m3/d,平均每小时排放量0.5m3,pH=6.5-7.9,其废水中含有H+、OH-和少量的Cu2+和Ni2+离子。综
2、合该厂的废水水质水量特点,决定按照“分类收集、分类处理”的原则,采用“化学法+一步净化器”的“间歇式”处理方法,并在固液分离后调节废水pH值,以保证达到排放标准。本处理站的总投资为41.58万元,年运行费用为5.54万元,处理单位水量的成本为7.6元/m3。经处理后可使电镀废水达标排放,同时具有良好的社会效益和环境效益。关键词:电镀废水;化学法;一步净化器;间歇式;小流量IITheprojectdesignforelectroplatingwastewateroftheGuilin5718factoryStudent:RENShi-biaoTea
3、cher:ZHUYi-nianAbstract:Electroplatingindustryisoneofthethreeseriouspollutingindustryintheworld.Therearemanykindsofpollutantsintheelectroplatingwastewater,containingthetoxicandharmfulsubstances,suchasCr6+,Ni2+,CN-,Cu2+etc.Inthisdesign,thequantityandtheeffluent-qualityofthewas
4、tewaterareasfollows.Wastewatercontainingcyanide:8m3/dor1.0m3/h,[CN-]=(1.03-8.5)mg/L,withasmallnumberofCu2+andOH-init;Wastewatercontainingchromium:Q=8m3/dor1.0m3/h,[Cr6+]=(6.08-12.1)mg/L,withasmallnumberofH+init;Integratedwastewater:Q=4m3/dor0.5m3/h,pH=6.5-7.9,withsomeH+/OH-an
5、dasmallnumberofCu2+andNi2+init.Consideringthewastewaterqualityandquantitycharacteristics,thedesignchoosestheintermittent“chemicaltreatment+steppurifier”asthetreatmentofthewastewaterinaccordancewiththeprincipleofcollecting&treatingseparately.Andafterthesolid-liquidseparationad
6、justthepHvalueofwastewatertoensurethatemissionstandard.Theeffluentwillaccordwiththenationalfirstambienteffluentqualitystandardofthefirstandthesecondpolluents.Theoverallcostoftheplantis415,800yuan,andtheoperatingchargeisabout55,400yuanperyear.Thecostofthistreatmentisabout7.6yu
7、an/m3.Theresultofthistreatmentwillaccordtotheeffluent-qualitystandard,andithasagoodsocialandenvironmentalbenefits.Keywords:electroplatingwastewater;chemicaltreatment;steppurifier;intermittently;smallflowII目次摘要IAbstractII1引言11.1电镀与电镀废水11.1.1电镀及电镀废水来源11.1.2电镀废水的性质和危害11.2我国电镀污染现
8、状31.3电镀废水处理技术综述31.3.1物理方法41.3.2化学方法41.3.3物理化学方法61.3.4生物处理方法71.4设计的主要