Ngokongeza i-polydimethyldiallylammonium chloride (PDMDAAC), i-polyaluminum chloride (PAC) kunye ne-composite flocculant yezi zimbini ekusebenzeni okuqhubekayo kwe-membrane bioreactor (MBR), ziphandwe ukuze kuncitshiswe i-MBR. Isiphumo sokungcoliswa kwe-membrane. Uvavanyo lulinganisa utshintsho lomjikelo wokusebenza we-MBR, ixesha lokufunxwa kwamanzi e-sludge activated (CST), i-Zeta potential, i-sludge volume index (SVI), ukusasazwa kobungakanani be-sludge floc kunye nomxholo we-polymer yangaphandle kunye nezinye iiparameter, kwaye kujongwe i-reactor Ngokweenguqu ze-activated sludge ngexesha lokusebenza, kuchongiwe iidosi ezintathu ezongezelelweyo kunye neendlela zedosi ezizezona zilungileyo ezine-flocculation dosage encinci.
Iziphumo zovavanyo zibonisa ukuba i-flocculant inokuphelisa ngempumelelo ukungcoliswa kwe-membrane. Xa ii-flocculants ezintathu ezahlukeneyo zongezwa kwidosi enye, i-PDMDAAC yaba nefuthe elihle ekunciphiseni ungcoliseko lwe-membrane, ilandelwa zii-flocculants ezidityanisiweyo, kwaye i-PAC yaba nefuthe elibi kakhulu. Kuvavanyo lwe-supplementary dosage kunye ne-dosing interval mode, i-PDMDAAC, i-composite flocculant, kunye ne-PAC zonke zibonise ukuba i-supplemental dosage yayisebenza ngakumbi kune-dosage ekunciphiseni ungcoliseko lwe-membrane. Ngokwendlela yokutshintsha koxinzelelo lwe-transmembrane (TMP) kuvavanyo, kunokugqitywa ukuba emva kokongezwa kokuqala kwe-400 mg/L PDMDAAC, i-supplemental dose engcono yi-90 mg/L. I-supplemental dosage efanelekileyo ye-90 mg/L inokwandisa kakhulu ixesha lokusebenza eliqhubekayo le-MBR, eliphindwe kathathu kunele-reactor ngaphandle kwe-supplementary flocculant, ngelixa i-supplemental dosage efanelekileyo ye-PAC yi-120 mg/L. I-flocculant edityanisiweyo eyenziwe yi-PDMDAAC kunye ne-PAC enomlinganiselo wobunzima we-6:4 ayinakukuphelisa kuphela ukungcoliswa kwe-membrane, kodwa ikwanciphisa neendleko zokusebenza ezibangelwa kukusetyenziswa kwe-PDMDAAC yodwa. Ukudibanisa indlela yokukhula kwe-TMP kunye notshintsho lwexabiso le-SVI, kunokugqitywa ukuba idosi efanelekileyo yesongezelelo se-flocculant edityanisiweyo yi-60mg/L. Emva kokongeza i-flocculant, inokunciphisa ixabiso le-CST lomxube we-sludge, yonyuse amandla e-Zeta omxube, yohlise ixabiso le-SVI kunye nomxholo we-EPS kunye ne-SMP. Ukongezwa kwe-flocculant kwenza i-sludge flocculate esebenzayo iqine ngakumbi, kwaye umphezulu we-membrane module Umaleko wekhekhe lesihluzo owenziweyo uba mncinci, wandisa ixesha lokusebenza kwe-MBR phantsi kokuhamba rhoqo. I-flocculant ayinampembelelo icacileyo kumgangatho wamanzi amdaka e-MBR. I-reactor ye-MBR ene-PDMDAAC inomlinganiselo wokususwa ophakathi we-93.1% kunye ne-89.1% ye-COD kunye ne-TN, ngokwahlukeneyo. Uxinzelelo lwenkunkuma lungaphantsi kwama-45 kunye nama-5mg/L, lufikelela kwinqanaba lokuqala lokukhupha amanzi.
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Ixesha lokuthumela: Novemba-22-2021