【摘要】 将升流式厌氧污泥床(UASB)反应器在(35±1)℃下运行102天处理低浓度废水,研究微生物絮凝剂对厌氧污泥颗粒化的影响.结果表明:投加微生物絮凝剂或阳离子PAM(聚丙烯酰胺)对厌氧污泥颗粒化具有促进作用;连续投加微生物絮凝剂的反应器1(R1)运行43天后,容积负荷达3.8 g/(L.d)(以单位容积反应器每天的化学需氧量负荷计),而投加阳离子PAM的反应器2(R2)和对照反应器3(R3)达到同样的容积负荷分别需要44和98天;R1中的颗粒污泥在沉降性能和产甲烷活性方面优于R2中的颗粒污泥;实验结束时,R1,R2和R3的COD去除率分别为94.5%,91.7%和84.0%.更多还原

【Abstract】 Upflow anaerobic sludge blanket(UASB) reactors were operated at(35±1)℃ for 102 days to reveal the effect of bioflocculant on the anaerobic granulation of sludge during the treatment of low-strength wastewater.The results indicate that the addition of bioflocculant or cationic polyacrylamide(PAM) markedly accelerates the anaerobic granulation,that Reactor 1 (R1) with the addition of bioflocculant is of an organic loading rate(OLR) of 3.8g/(L·d)(calculated as the loading of COD on the reactor per liter per day) in 43 days,while Reactor 2(R2) with the addition of cationic PAM and the control reactor 3(R3) reach the same value respectively in 44 and 98 days,that the granules developed in R1 exhibit better settleability and methanogenic activity than those in R2,and that the COD removal efficiencies of R1,R2 and R3 respectively reach 94.5%,91.7% and 84.0%when the experiments have been finished.更多还原