Ngokufaka i-polydimethyldiallylammonium chloride (PDMDAAC), i-polyaluminum chloride (PAC) kanye ne-flocculant ehlanganisiwe yalezi zinto ezimbili ekusebenzeni okuqhubekayo kwe-membrane bioreactor (MBR), baphenywe ukuze kuncishiswe i-MBR. Umphumela wokungcoliswa kwe-membrane. Ukuhlolwa kulinganisa izinguquko zomjikelezo wokusebenza we-MBR, isikhathi sokumuncwa kwamanzi e-sludge capillary esisebenzayo (CST), i-Zeta potential, i-sludge volume index (SVI), ukusatshalaliswa kosayizi wezinhlayiya ze-sludge floc kanye nokuqukethwe kwe-polymer yangaphandle kanye neminye imingcele, futhi kubhekwe i-reactor Ngokusho kwezinguquko ze-sludge esebenzayo ngesikhathi sokusebenza, kunqunywe imithamo emithathu eyengeziwe kanye nezindlela zomthamo ezingcono kakhulu ngemithamo encane ye-flocculation.
Imiphumela yokuhlolwa ikhombisa ukuthi i-flocculant inganciphisa ngempumelelo ukungcola kwe-membrane. Lapho ama-flocculant amathathu ahlukene engezwa ngesilinganiso esifanayo, i-PDMDAAC yaba nomthelela omuhle kakhulu ekunciphiseni ukungcola kwe-membrane, kulandelwe ama-flocculant ahlanganisiwe, kanti i-PAC yaba nomthelela omubi kakhulu. Ekuhlolweni kwesilinganiso esengeziwe kanye nemodi yesikhawu sokulinganisa, i-PDMDAAC, i-flocculant ehlanganisiwe, kanye ne-PAC konke kubonise ukuthi isilinganiso esengeziwe sasisebenza kangcono kunokulinganisa ekunciphiseni ukungcola kwe-membrane. Ngokusho kokushintsha kwengcindezi ye-transmembrane (TMP) ekuhlolweni, kungatholakala ukuthi ngemuva kokungezwa kokuqala kwe-400 mg/L PDMDAAC, isilinganiso esengeziwe esingcono kakhulu singama-90 mg/L. Isilinganiso esengeziwe esingcono kakhulu sama-90 mg/L singandisa kakhulu isikhathi sokusebenza okuqhubekayo se-MBR, okuphindwe izikhathi ezingu-3.4 kunese-reactor ngaphandle kwe-flocculant esengeziwe, kuyilapho isilinganiso esengeziwe esingcono kakhulu se-PAC singama-120 mg/L. I-flocculant ehlanganisiwe eyakhiwe yi-PDMDAAC kanye ne-PAC enesilinganiso sobuningi esingu-6:4 ayikwazi nje kuphela ukunciphisa ukungcola kwe-membrane, kodwa futhi inciphise nezindleko zokusebenza ezibangelwa ukusetshenziswa kwe-PDMDAAC kuphela. Ukuhlanganisa umkhuba wokukhula kwe-TMP kanye noshintsho lwenani le-SVI, kungatholakala ukuthi umthamo ofanele wesengezo se-flocculant ehlanganisiwe ungu-60mg/L. Ngemva kokufaka i-flocculant, inganciphisa inani le-CST lengxube ye-sludge, yandise amandla e-Zeta engxube, inciphise inani le-SVI kanye nokuqukethwe kwe-EPS kanye ne-SMP. Ukwengezwa kwe-flocculant kwenza i-sludge flocculate esebenzayo iqine kakhulu, kanye nobuso be-membrane module Ungqimba lwekhekhe lokuhlunga olubunjiwe luba luncane, lwandise isikhathi sokusebenza se-MBR ngaphansi kokugeleza okungaguquki. I-flocculant ayinawo umthelela ocacile ekhwalithini yamanzi angcolile e-MBR. I-reactor ye-MBR ene-PDMDAAC inesilinganiso sokususwa esimaphakathi esingu-93.1% kanye no-89.1% we-COD kanye ne-TN, ngokulandelana. Ukuhlushwa kokungcola kungaphansi kuka-45 no-5mg/L, kufinyelela ezingeni lokuqala lokukhishwa kwe-A.
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Isikhathi sokuthunyelwe: Novemba-22-2021