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1、水污染控制工程下册答案（Waterpollutioncontrolengineering.）1,trytoexplainwhattypesofprecipitation?Whatarethecharacteristicsofeach?Discusstypesofconnectionsanddifferences.Answer:freeprecipitation:theconcentrationofsuspendedparticlesisnothigh;intheprecipitationprocess,suspendedsolidsdo
2、notinterferewitheachother,particlesseparateprecipitation,particleprecipitationtrajectoryinastraightline.Thephysicalpropertiesoftheparticlesremainunchangedduringprecipitation.Occursingritchamber.Flocculationprecipitation:theconcentrationofsuspendedparticlesisnothigh;inthe
3、processofprecipitation,thesuspendedparticleshaveflocculationwitheachother;theparticlesacceleratethesettlementduetotheaccumulationofeachother,andtheprecipitationtrajectoryshowsacurve.Duringprecipitation,themass,shapeandsettlingvelocityofparticleschange.Chemicalflocculatio
4、nprecipitationbelongstothistype.Regionalprecipitationorprecipitationlayer:concentrationofsuspendedparticlesishigher(morethan5000mg/L);settlementaffectedaroundotherparticles,maintaintherelativepositionbetweentheparticlesunchanged,formingawholesinktogether,withaclearmudint
5、erfacebetweenclearwater.Thetwoclarifieroccurredinthesludgethickeningtank.Compressionsedimentation:highconcentrationofsuspendedparticles;amongparticleshavebeensqueezedintoagrouplikestructure,contactwitheachother,tosupporteachother,beingsqueezedoutofthegravitywaterbetweenp
6、articlesintheupperlayerofparticles,thesludgeconcentration.Twotheaccumulationofsludgeinthesludgetankandconcentrationtankiscompressedandprecipitated.Contactanddifference:freeprecipitation,flocculationprecipitation,regionalprecipitationorstratifiedprecipitation,theconcentra
7、tionofsuspendedparticlesincompressionandprecipitationincreasesinturn,andtheinteractionbetweenparticlesisstrengthenedinturn.2,whatisthepurposeandfunctionofthegritchamber?Whatisthedifferencebetweenanaeratedsandsettlingtankandaflowsandsinkingtank?Answer:thepurposeandfunctio
8、nofsettingsandpoolbygravityorcentrifugalforceseparationasthefoundation,isabouttoenterthecontrolthatthei
