Degradation of dimethyl-sulfoxide-containing wastewater using airlift bioreactor by polyvinyl-alcohol-immobilized cell beads
Degradation of dimethyl-sulfoxide-containing wastewater using airlift bioreactor by polyvinyl-alcohol-immobilized cell beads
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DOI：
10.1016/j.biortech.2011.02.030
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发表时间：
2011-05-01
影响因子：
11.4
通讯作者：
Hwang, Sz-Chwun John
中科院分区：
文献类型：
--
作者：
He, Sin-Yi;Lin, Yun-Huin;Hwang, Sz-Chwun John
从污泥的蔗糖驯化策略和PVA细胞小球对微生物的保护作用两个方面考察了气升式生物反应器对二甲基亚砜(DMSO)的降解能力。蔗糖浓度为50 mg的L-1有利于PVA包埋新鲜污泥中DMSO的降解，而驯化后的PVA包埋污泥对DMSO的耐受性不明显。在富氧气升式生物反应器中投加1187.4 mg的L-1二甲基亚砜，经过一系列驯化批次后，二甲基亚砜的去除效率最高，达到每天1.42kgDMSO/kg悬浮物的水平。在不产生任何二甲基硫的情况下，需要微生物联合体才能完全生物降解DMSO。假单胞菌属W1是气升式生物反应器中最有效的DMSO降解菌之一，经吲哚鉴定为胞外单加氧酶。(C)2011爱思唯尔有限公司。保留所有权利。
Airlift bioreactor containing polyvinyl-alcohol-immobilized cell beads was investigated for its capability of biodegradation of dimethyl sulfoxide (DMSO) in term of sludge characteristics including the strategy of acclimation with sucrose and the protection of microorganism from poisoning of DMSO by PVA cell beads. Media condition with sucrose at 50 mg L-1 was beneficial to the biodegradation of DMSO in the fresh PVA entrapped-sludge, but became insignificant in the acclimated one as for tolerance of DMSO toxicity. The removal efficiency of DMSO had the highest rate at 1.42-kg DMSO per kilogram of suspended solid per day after series acclimation batches in the oxygen-enriched airlift bioreactor treated with the 1187.4 mg L-1 of DMSO. Microbial consortium was required for the complete biodegradation of DMSO without any dimethyl sulfide produced. Pseudomonas sp. W1, excreting extracellular monooxygenase identified by indole, was isolated to be one of the most effective DMSO-degrading microorganism in our airlift bioreactor. (C) 2011 Elsevier Ltd. All rights reserved.