:=KDQJHWDO&RPSDULVRQRI'HJUDGDWLRQRI/LJQLQFRQWDLQLQJ:DVWHZDWHUV« Chem. Biochem. Eng. Q. ±
RSWLPDOWUHDWPHQWWHPSHUDWXUHRIWKHWZRPLFURELDO FRQVRUWLD ZDV ႏ$FFRUGLQJ WR UHIHUHQFH WKH RSWLPDO JURZWK WHPSHUDWXUH RI PRVW PLFURRUJDQ LVPVZDVႏ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ffect of pH on COD removal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ffect of dissolved oxygen on COD removal ,Q WKH SURFHVV RI OLJQLQ GHJUDGDWLRQ PLFURRU JDQLVPVKDYHDFHUWDLQGHPDQGIRUR[\JHQ)RULQ VWDQFHLQWKHVKDNLQJIODVNH[SHULPHQWRIPLFURELDO OLJQLQGHJUDGDWLRQLWLVRIWHQQHFHVVDU\WRDGMXVWWKH
VKDNLQJVSHHG 7KHSUHYLRXVH[SHULPHQWVVKRZHG WKDW WKH RSWLPDO GLVVROYHG R[\JHQ FRQFHQWUDWLRQ RI WKHPLFURELDOFRQVRUWLDZDVPJ/ ± ,QJHQ HUDOWKHGLVVROYHGR[\JHQFRQFHQWUDWLRQRIDHURELF ELRORJLFDOZDVWHZDWHUWUHDWPHQWLVFRQWUROOHGLQWKH UDQJH IURP PJ / ± WR PJ / ±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± )RU WKH WUHDWPHQW RI SDSHU PDNLQJZDVWHZDWHUWKHUHPRYDOHIILFLHQF\RI&2' UHDFKHGE\-DIWHUKDWWKHGLVVROYHG R[\JHQ FRQFHQWUDWLRQ RI PJ / ± 0LFURRUJDQ LVPV JURZ VORZO\ XQGHU ORZ GLVVROYHG R[\JHQ +RZHYHUWKLVZLOOUHVXOWLQZDVWHHQHUJ\DQGFDXVH FHOOR[LGDWLRQDQGGHDWKGXHWRUHODWLYHODFNRIQX WULWLRQ LI WKH FRQFHQWUDWLRQ RI GLVVROYHG R[\JHQ LV WRRKLJK Effect of wastewater concentration on COD removal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
Made with FlippingBook Digital Proposal Creator