Kuburikidza nekuwedzera kwepolydimethyldiallylammonium chloride (PDMDAAC), polyaluminium chloride (PAC) uye inoumbwa inoyerera yezviviri mukuenderera mberi kwekushanda kwe membrane bioreactor (MBR), vakaongororwa kuderedza MBR.Mhedzisiro yekusvibisa membrane.Muedzo unoyera shanduko yeMBR inoshanda kutenderera, activated sludge capillary mvura absorption nguva (CST), Zeta inogona, sludge volume index (SVI), sludge floc particle size distribution uye extracellular polymer content uye mamwe maparameter, uye cherechedza reactor Maererano ne shanduko yeakagadziriswa sludge panguva yekushanda, matatu ekuwedzera dosages uye dosage nzira idzo dzakanakisa dzine shoma flocculation dosage dzakatemwa.
Mhedzisiro yebvunzo inoratidza kuti iyo flocculant inogona kunyatso kudzikamisa membrane foiling.Pakaiswa ma flocculants matatu akasiyana padanho rimwe chete, PDMDAAC yakave nemhedzisiro yakanakisa pakudzikisa kusvibiswa kwe membrane, ichiteverwa necomposite flocculants, uye PAC yakave nemhedzisiro yakaipisisa.Muyedzo yekuwedzera dosi uye dosing interval mode, PDMDAAC, composite flocculant, uye PAC zvese zvakaratidza kuti yekuwedzera dosi yainyanya kushanda kupfuura dosing mukuderedza kusvibiswa kwe membrane.Zvinoenderana neshanduko yekuchinja kweiyo transmembrane pressure (TMP) mukuyedza, zvinogona kutariswa kuti mushure mekuwedzera kwekutanga kwe400 mg/L PDMDAAC, yakanakisa yekuwedzera dosi i90 mg/L.The optimal supplemental dosage ye90 mg/L inogona kurebesa zvakanyanya kuenderera mberi kwekushanda kweMBR, inova 3.4 times that rereactor isina supplementary flocculant, ukuwo optimal supplemental dosage yePAC iri 120 mg/L.Iyo composite flocculant inoumbwa nePDMDAAC nePAC ine huwandu hwehuwandu hwe6: 4 haigoni kungogadzirisa zvinobudirira membrane fouling, asiwo kuderedza kushandiswa kwemari kunokonzerwa nekushandiswa kwePDMDAAC chete.Kubatanidza maitiro ekukura kweTMP uye shanduko yeSVI kukosha, zvinogona kutariswa kuti iyo yakakwana dosage yecomposite flocculant yekuwedzera ndeye 60mg/L.Mushure mekuwedzera flocculant, inogona kuderedza kukosha kweCST yemusanganiswa wesludge, kuwedzera Zeta mukana wemusanganiswa, kuderedza kukosha kweSVI uye zvinyorwa zveEPS uye SMP.Kuwedzerwa kweiyo flocculant kunoita kuti yakagadziriswa sludge ifambe zvakasimba, uye pamusoro pe membrane module Iyo yakaumbwa sefa keke layer inova yakatetepa, ichiwedzera nguva yekushanda yeMBR pasi pekuyerera nguva dzose.Iyo flocculant haina mhedzisiro iri pachena paMBR yakasviba mvura yemhando.Iyo MBR reactor ine PDMDAAC ine avhareji yekubvisa mwero we93.1% uye 89.1% yeCOD neTN, zvichiteerana.Kuwanda kwemvura inoyerera iri pasi pe45 uye 5mg/L, kusvika padanho rekutanga A kubuda.standard.
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Nguva yekutumira: Nov-22-2021