Pathways of inhibition of filamentous sludge bulking by slowly biodegradable organic compounds  

作　　者：Chundi Gao Fan Yang Zinan Tian Diyao Sun Weilin Liu Yongzhen Peng 

机构地区：[1]Water Quality Science and Water Environment Recovery Engineering,Beijing University of Technology,Beijing 100124,China

出　　处：《Journal of Environmental Sciences》2025年第4期104-115,共12页环境科学学报(英文版)

基　　金：supported by the Opening Project of National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology,and the National Natural Science Foundation of China(No.52270017).

摘　　要：The organic compound composition ofwastewater,serves as a crucial indicator for the operational performance of activated sludge processes and has a major influence on the development of filamentous bulking in activated sludge.This study focused on the impact of typical soluble and slowly-biodegradable organic compounds,investigating the pathways through which these substrates affect the occurrence of filamentous bulking in systems operated under both high-and low-oxygen conditions.Results showed that slowly-biodegradable organic compounds lead to a concentrated distribution of microorganisms within flocs,with inward growth of filamentous bacteria.Both Tween-80 and granular starch treated systems exhibited a significant increase in protein content.The glucose system,utilizing soluble substrates,exhibited a markedly higher total polysaccharide content.Microbial communities in the Tween-80 and granular starch treated systems were characterized by a higher abundance of bacteria known to enhance sludge flocculation and settling,such as Competibacter,Xanthomonadaceae and Zoogloea.These findings are of high significance for controlling the operational performance and stability of activated sludge systems,deepening our understanding and providing a novel perspective for the improvement of wastewater treatment processes.

关 键 词：Sludge bulking Slowly biodegradable organic COMPOUNDS Sludge morphology EPS Microbial community 

分 类 号：X703[环境科学与工程—环境工程]