Kodi flocculant ikhoza kuyikidwa mu dziwe la membrane la MBR?

Kupyolera mu kuwonjezera kwa polydimethyldiallylammonium chloride (PDMDAAC), polyaluminium chloride (PAC) ndi flocculant yophatikizika ya ziwirizi mukugwira ntchito kosalekeza kwa nembanemba bioreactor (MBR), adafufuzidwa kuti achepetse MBR. Zotsatira za kuwonongeka kwa membrane. Mayesowa amayesa kusintha kwa kayendetsedwe ka ntchito ya MBR, nthawi ya sludge capillary water absorption time (CST), Zeta kuthekera, sludge volume index (SVI), sludge floc particle size distribution and extracellular polymer content ndi zina, ndikuwona riyakitala. kusintha kwa sludge yomwe imagwira ntchito, njira zitatu zowonjezera ndi njira za mlingo zomwe zili zabwino kwambiri ndi mlingo wochepa wa flocculation zatsimikiziridwa.  

Zotsatira zoyesa zikuwonetsa kuti flocculant imatha kuchepetsa kuwonongeka kwa membrane. Pamene ma flocculants atatu osiyana adawonjezedwa pa mlingo womwewo, PDMDAAC inali ndi zotsatira zabwino kwambiri zochepetsera kuipitsidwa kwa membrane, kutsatiridwa ndi flocculants yophatikizika, ndipo PAC inali ndi zotsatira zoyipa kwambiri. Pakuyesa kwa mlingo wowonjezera wa mlingo ndi nthawi ya dosing, PDMDAAC, composite flocculant, ndi PAC zonse zinasonyeza kuti mlingo wowonjezera unali wothandiza kwambiri kusiyana ndi kuchepetsa kuipitsidwa kwa membrane. Malingana ndi kusintha kwa kusintha kwa mphamvu ya transmembrane (TMP) pakuyesa, zikhoza kudziwika kuti pambuyo pa kuwonjezera koyamba kwa 400 mg / L PDMDAAC, mlingo wabwino kwambiri wowonjezera ndi 90 mg / L. Mlingo wowonjezera wowonjezera wa 90 mg/L utha kutalikitsa nthawi yopitilira ya MBR, yomwe ndi nthawi 3.4 kuposa ya reactor popanda flocculant yowonjezera, pomwe mulingo wowonjezera wa PAC ndi 120 mg/L. Flocculant yopangidwa ndi PDMDAAC ndi PAC yokhala ndi chiŵerengero chachikulu cha 6: 4 sichikhoza kuchepetsa kusokoneza kwa membrane, komanso kuchepetsa ndalama zogwiritsira ntchito chifukwa chogwiritsa ntchito PDMDAAC yokha. Kuphatikiza kakulidwe ka TMP ndi kusintha kwa mtengo wa SVI, zitha kudziwika kuti mulingo woyenera kwambiri wa composite flocculant supplement ndi 60mg/L. Pambuyo powonjezera flocculant, ikhoza kuchepetsa mtengo wa CST wa kusakaniza kwa sludge, kuonjezera mphamvu ya Zeta ya osakaniza, kuchepetsa mtengo wa SVI ndi zomwe zili mu EPS ndi SMP. Kuwonjezera kwa flocculant kumapangitsa kuti sludge flocculate ikhale yolimba kwambiri, ndipo pamwamba pa nembanemba gawo lopangidwa ndi fyuluta mkate wosanjikiza umakhala wochepa thupi, kukulitsa nthawi ya ntchito ya MBR nthawi zonse. The flocculant alibe zotsatira zoonekeratu pa MBR effluent madzi khalidwe. The MBR reactor yokhala ndi PDMDAAC ili ndi chiwopsezo chochotsera 93.1% ndi 89.1% ya COD ndi TN, motsatana. Kuchuluka kwa madzi otayira kumakhala pansi pa 45 ndi 5mg/L, kufika pa mlingo woyamba A kukhetsa. muyezo.

Kuchokera ku Baidu.

Can flocculant be put into MBR membrane pool


Nthawi yotumiza: Nov-22-2021

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