Ta hanyar ƙara polydimethyldiallylammonium chloride (PDMDAAC), polyaluminum chloride (PAC) da kuma wani hadadden flocculant na biyu a ci gaba da aiki na membrane bioreactor (MBR), an binciki su don rage MBR. Tasirin gurɓataccen membrane. Gwajin yana auna canje-canjen zagayowar aiki na MBR, lokacin shan ruwa mai aiki (CST), ƙarfin Zeta, ma'aunin ƙarar sludge (SVI), rarraba girman barbashi na sludge floc da abun cikin polymer na extracellular da sauran sigogi, kuma ana lura da reactor. Dangane da canje-canjen sludge da aka kunna yayin aiki, an tantance ƙarin allurai guda uku da hanyoyin allurai waɗanda suka fi kyau tare da ƙarancin allurar flocculation.
Sakamakon gwajin ya nuna cewa flocculant zai iya rage gurɓatar membrane yadda ya kamata. Lokacin da aka ƙara flocculants guda uku daban-daban a daidai wannan adadin, PDMDAAC ya fi tasiri wajen rage gurɓatar membrane, sai kuma flocculants masu haɗaka, kuma PAC ya sami mafi munin tasiri. A gwajin ƙarin sashi da yanayin tazara na allurai, PDMDAAC, flocculant masu haɗaka, da PAC duk sun nuna cewa ƙarin sashi ya fi tasiri fiye da allurai wajen rage gurɓatar membrane. Dangane da canjin yanayin matsin lamba na transmembrane (TMP) a cikin gwajin, za a iya tantance cewa bayan ƙarin 400 mg/L PDMDAAC na farko, mafi kyawun kashi na ƙarin shine 90 mg/L. Mafi kyawun kashi na ƙarin sashi na 90 mg/L zai iya tsawaita lokacin aiki na MBR sosai, wanda shine sau 3.4 na reactor ba tare da ƙarin flocculant ba, yayin da mafi kyawun kashi na ƙarin sashi na PAC shine 120 mg/L. Ruwan da aka haɗa da PDMDAAC da PAC tare da rabon taro na 6:4 ba wai kawai zai iya rage gurɓatar membrane yadda ya kamata ba, har ma zai iya rage farashin aiki da amfani da PDMDAAC kaɗai ke haifarwa. Idan aka haɗa yanayin girma na TMP da canjin ƙimar SVI, za a iya tantance cewa mafi kyawun adadin ƙarin ruwan da aka haɗa shine 60mg/L. Bayan ƙara ruwan da aka haɗa, zai iya rage ƙimar CST na cakuda sludge, ƙara ƙarfin Zeta na cakuda, rage ƙimar SVI da abun ciki na EPS da SMP. Ƙarin ruwan da aka haɗa yana sa ruwan da aka kunna ya yi ƙarfi sosai, kuma saman membrane module ɗin Layer ɗin kek ɗin da aka samar ya zama siriri, yana tsawaita lokacin aiki na MBR a ƙarƙashin kwararar da ke ci gaba. Ruwan da aka samar ba shi da wani tasiri a fili akan ingancin ruwan da ke fitar da ruwa na MBR. Ruwan da aka samar da MBR tare da PDMDAAC yana da matsakaicin ƙimar cirewa na 93.1% da 89.1% ga COD da TN, bi da bi. Yawan fitar da ruwa daga cikin ruwan yana ƙasa da 45 da 5mg/L, wanda ya kai matakin farko na fitar ruwa.
An ɗauko daga Baidu.
Lokacin Saƙo: Nuwamba-22-2021