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首页> 外文期刊>International Biodeterioration & Biodegradation >Toxicity in different molecular-weight fractions of sludge treating synthetic wastewater containing 4-chlorophenol
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Toxicity in different molecular-weight fractions of sludge treating synthetic wastewater containing 4-chlorophenol

机译:不同分子量级分的污泥处理含4-氯苯酚的合成废水的毒性

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This study investigated sludge toxicity in removal of 4-chlorophenol (4-CP) in reactor system with addition of methanol. The toxicity was evaluated in two sequential batch reactors (SBRs), namely acclimated sludge reactor with addition of 10 mg l(-1) 4-CP and control sludge reactor without 4-CP addition. Results showed that even though 4-CP both in aqueous and sludge phases was undetectable, the toxicity of the acclimated sludge was still higher than the control sludge, which was assessed with Photobacterium phosphoreum (P. phosphoreum). Adsorption and biodegradation assays indicated that secondary metabolites from microorganism also contributed to sludge toxicity in addition to 4-CP itself. The different molecular-weight (MW) distribution of organic substances in sludge analysis validated that the mass fractions of TOC at >10 K and 10 K-500 were significantly related to the sludge toxicity. (c) 2015 Elsevier Ltd. All rights reserved.
机译:这项研究调查了在添加甲醇的反应器系统中去除4-氯苯酚(4-CP)时的污泥毒性。在两个连续的间歇式反应器(SBR)中评估了毒性,即添加10 mg l(-1)4-CP的适应性污泥反应器和不添加4-CP的对照污泥反应器。结果表明,即使在水相和污泥相中均未检测到4-CP,但驯化的污泥的毒性仍高于对照污泥,该污泥用磷光细菌(P.phosphorum)进行了评估。吸附和生物降解试验表明,除4-CP本身外,微生物的次生代谢产物也有助于污泥毒性。污泥分析中有机物的不同分子量(MW)分布证明,> 10 K和10 K-500时TOC的质量分数与污泥毒性显着相关。 (c)2015 Elsevier Ltd.保留所有权利。

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