文献类型：期刊文献

英文题名：Indole-3-acetic acid mediated removal of sludge toxicity by microalgae: Focus on the role of extracellular polymeric substances

作者：Li, Renjie[1,2];Song, Meijing[1,2];Yin, Danning[1,2];Ye, Xiaoyun[1,2];Yu, Jiayu[1,2];Chen, Xiurong[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China

年份：2023

卷号：387

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;EI(收录号：20230221540);WOS:【SCI-EXPANDED(收录号:WOS:001066685100001)】；

基金：This research was supported by the National Natural Science Foun-dation of China (No. 52270069) and the Science and Technology Commission of Shanghai Municipality (No. 22dz1205702) .

语种：英文

外文关键词：Indole-3-acid; Sludge toxicity; Tetradesmus obliquus; Extracellular polymeric substances; Proteomics

摘要：The use of indole-3-acid (IAA) as an additive aided in achieving the objectives of reducing sludge extract toxicity, increasing Tetradesmus obliquus biomass yield, and enhancing extracellular polysaccharide production. Proteomics analysis can unveil the microalgae's response mechanism to sludge toxicity stress. With 10-6 M IAA addition, microalgae biomass reached 3.426 & PLUSMN; 0.067 g/L. Sludge extract demonstrated 78.3 & PLUSMN; 3.2% total organic carbon removal and 72.2 & PLUSMN; 2.1% toxicity removal. Extracellular polysaccharides and proteins witnessed 2.08 and 1.76-fold increments, respectively. Proteomic analysis indicated that Tetradesmus obliquus directed carbon sources towards glycogen accumulation and amino acid synthesis, regulating pathways associated with carbon metabolism (glycolysis, TCA cycle, and amino acid metabolism) to adapt to the stressful environment. These findings lay the groundwork for future waste sludge treatment and offer novel insights into microalgae cultivation and extracellular polysaccharide enrichment in sludge.