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doi10.3969/j.issn.1002-154X.2011.04.005----*321022*321000、、6。。2011-03-041965~、、。Reduction-Oxidation-AlkalinePrecipitation-HeavyCatching-IronCarbonMethodtoTreatElectroplatingWastewaterShenQiaolianLiWen*JinhuaTVUniversityZhejiangJinhua321022*HaiheRiverInstituteofEnvironmentalScienceJinhuaCityZhejiangJinhua321000AbstractConsideringthecharacteristicsofelectroplatingwastewaterwithcyanidechromiumacidweadopt-edthetechnologyofoxidationtobreakthecyanide.Aftertheprocessofhexavalentchromiumreductionandalkalineprecipitationtheheavymetalchelatingagentthenwasaddedinto.wealsousedironreductiontofurtherreducethecarboncontentofheavymetalsinwastewaterinwhichthethepurposeofthedepthofremovalofheavymetalswasa-chieved.Finallydegradatingtheorganicpollutantsinwastewaterthroughcontactoxidationthesludgeinall-levelsedimentationtankswasregularlypipedintothecollectionbasinsbyhydrostaticpressureinwhichthewaterwaspro-cessedsoundlyaftermechanicalfilterpress.Theresultshowsthatthetreatmenteffectisstableandreliablewhichcanensurethattheelectroplatedwastewatermeetsthestandardsandcanbedischarged.Keywordselectroplatedwastewateroxidationheavycatchingreductionofironcarbon20m3/d20m3/d45m3/dGB8978-1996。。、、、、、。11.1—51—25420114ChemicalIndustryTimesVol.25No.4Apr.4.20111Table1Qualityandquantityofwastewater/m3/dpHmg/LpHCODcrCN-Cr6+202~5≤50≤20≤30≤20205~6≤50≤20≤30、602~5≤350≤50≤10≤50106~9≤4001.22《》GB21900-2008Table2Thetreatedwatermeetstherequirementsof<DischargeStandardforPollutantsfromElectroplating>GB21900-2008pHCODcrCN-Cr6+6-9≤80≤0.3≤0.5≤0.5≤1.0≤0.2≤3.0pHmg/L22.1、、、。1。º¬¸õ·ÏË®µ÷½Ú³Øµ÷½Ú³Øµ÷½Ú³Ø±Ã±ÃËữ»¹Ô³Ø¶à¼¶·´Ó¦³ØÒ»¼¶³Áµí³ØÖмäË®³Ø±ÃËáÏ´、×ۺϷÏË®Éú»¯³Ø»ìÄý·´Ó¦³Ø¶þ³Á³ØÌú̼³Ø¼¯Äà³Ø±Ã±Ã±ÃѹÂË»úº¬Çè·ÏË®¶þ¼¶ÆÆÇè³Ø1Fig.1WastewaterTreatmentProcessFlowDiagram2.21、。、CN-CNO-、CNO-CO2N2、。CN-+ClO-+H2→OCNCl+2OH-CNCl+2OH→-CNO-+Cl-+H2O2CNO-+3ClO-+H2→O2CO2↑+N2↑+3CL-+2OH-pH、ORP。2、3、。Cr2O72-+3HSO3-+5H→+—61—2011.Vol.25No.4·《Technology&Experiment》2Cr3++3SO42-+4H2O2CrO42-+3HSO3-+7H→+2Cr3++3SO42-+5H2OpH、ORP。3、pHPAC、PAM。。pH。4。。。5、、COD。6PAC、PAMCOD。。、。31、60m324h。220m324h。320m324h。。420m324h。。520m3。64m30.6h。。78m31.2h。829m2。950m38h。1012m32h。11100m3。1212m32h。1315m2。1450m3。153m3。44.13Table3ThetotaleffectofwastewatertreatmentCN-Zn2+Cr6+pH<0.0500.4700.13211.0707.353.82<0.0507.9010.5100.44023.154<0.0052.090.0050.1600.3850.273<0.0048.60pHmg/L—71—----2011.Vol.25No.44.2《》GB21900-2008。742/d100m37.4/t。51、。。ORPpH。2。。。—。3。RO。RO。。+-。4COD。。。5、。1.《》GB21900-2008S..2、、.M.19963《》GBJ136-90S.19904《》M.20035《》M.檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸2002201115.1%2011415963119.7%15.1%。14.4%。39。97.7%0.1。1~2645534.3%。39381。15.1%5136t6.7%。PPI7.1%10.2%。11.8%。6。800329.5%。399626.5%400732.6%。—81—2011.Vol.25No.4·《Technology&Experiment》
本文标题:还原氧化碱性沉淀重捕铁碳法处理电镀废水沈巧莲
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