Ta hanyar ƙari na polydimethyldiallylammonium chloride (PDMDAAC), polyaluminum chloride (PAC) da kuma nau'in flocculant na biyu a cikin ci gaba da aiki na membrane bioreactor (MBR), an bincika su don rage MBR. Tasirin lalatawar membrane. Gwajin yana auna canje-canje na sake zagayowar aiki na MBR, lokacin shayar da ruwa mai kunna sludge capillary (CST), yuwuwar Zeta, sludge volume index (SVI), sludge floc size sharing da extracellular polymer content da sauran sigogi, da kuma lura da reactor Bisa ga canje-canje na kunna sludge a lokacin aiki, uku kari da aka ƙaddara da mafi kyaun dosages da fulawa hanyoyin da aka ƙaddara tare da mafi kyaun kashi.
Sakamakon gwajin ya nuna cewa flocculant na iya rage ƙazamin membrane yadda ya kamata. Lokacin da aka ƙara yawan tsutsa guda uku a cikin sashi iri ɗaya, Pdmdaac sun fi dacewa a kan gurbataccen membrane pricute, da kuma bitawar tarko, kuma Pac suna da mummunan sakamako. A cikin gwajin ƙarin sashi da yanayin tsaka-tsaki na allurai, PDMDAAC, haɗaɗɗen flocculant, da PAC duk sun nuna cewa ƙarin adadin ya fi tasiri fiye da allurai don rage gurɓataccen ƙwayar cuta. Dangane da canjin yanayin matsa lamba na transmembrane (TMP) a cikin gwaji, ana iya ƙaddara cewa bayan ƙarawar farko na 400 mg/L PDMDAAC, mafi kyawun ƙarin kashi shine 90 mg/L. Matsakaicin mafi kyawun sashi na 90 MG/L na iya tsawaita ci gaba da aiki na MBR, wanda shine sau 3.4 na reactor ba tare da ƙarin flocculant ba, yayin da mafi kyawun kari na PAC shine 120 mg/L. Rukunin flocculant ɗin da ya ƙunshi PDMDAAC da PAC tare da yawan adadin 6:4 ba zai iya kawar da lalatawar membrane kawai yadda ya kamata ba, amma kuma yana rage farashin aiki ta hanyar amfani da PDMDAAC kaɗai. Haɗa haɓakar haɓakar TMP da canjin ƙimar SVI, ana iya ƙididdige cewa mafi kyawun sashi na ƙarin kayan flocculant shine 60mg/L. Bayan ƙara flocculant, zai iya rage ƙimar CST na cakuda sludge, ƙara ƙarfin Zeta na cakuda, rage ƙimar SVI da abun ciki na EPS da SMP. Bugu da ƙari na flocculant yana sa sludge mai kunnawa ya yi ta tamfi, kuma saman ma'aunin membrane The kafaffen tace cake Layer ya zama bakin ciki, yana tsawaita lokacin aiki na MBR a ƙarƙashin kullun. Flucculant ba shi da wani tasiri a bayyane akan ingancin ruwa mai zubar da ruwa na MBR. The MBR reactor tare da PDMDAAC yana da matsakaicin adadin cirewa na 93.1% da 89.1% na COD da TN, bi da bi. Matsakaicin magudanar ruwa yana ƙasa da 45 da 5mg/L, yana kaiwa matakin farko na fitarwa. misali.
An karbo daga Baidu.
Lokacin aikawa: Nuwamba-22-2021