离子液体强化剩余污泥厌氧发酵产酸效能研究  

Enhanced bioproduction of short-chain fatty acids by ionic liquid during anaerobic digestion of waste activated sludge

作　　者：马心阳 蒋心远 贺金岭 邰俊 刘泽庆 周永泉 张艾 MA Xin-yang;JIANG Xin-yuan;HE Jin-ling;TAI Jun;LIU Ze-qing;ZHOU Yong-quan;ZHANG Ai(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;Shanghai Environmental&Sanitary Engineering Design Institute Co.,Ltd.,Shanghai 200232,China)

机构地区：[1]东华大学环境学院,上海201620 [2]上海市环境卫生工程设计院有限公司,上海200232

出　　处：《中国环境科学》2024年第5期2562-2567,共6页China Environmental Science

基　　金：上海市青年科技启明星资助项目(23QC1400800);国家自然科学基金资助项目(52270062)。

摘　　要：针对污水处理厂剩余污泥厌氧发酵过程中有机质水解慢和酸化率低的问题,本文采用离子液体预处理促进污泥增溶破胞,并考察其对污泥厌氧发酵过程中有机质水解速率和短链脂肪酸(short-chain fatty acids,SCFAs)产量的影响.结果表明:投加离子液体[Emim]OTF能显著促进污泥溶胞,提高污泥水解速率及SCFAs产量,抑制污泥发酵产气;当离子液体投加量为0.1g/g VSS时,最大SCFAs产量可达226.4mg COD/(g TS),是未经预处理污泥的3.75倍;通过微生物多样性分析发现,投加离子液体[Emim]OTF富集了水解产酸菌,强化了污泥水解和酸化过程,从而导致SCFAs产量提高.The application of anaerobic digestion of waste activated sludge is hindered by low production rate of short-chain fatty acids(SCFAs)and inefficient sludge solubilization and hydrolysis.To surmount these challenges,this study used ionic liquid to promote sludge solubilization.Effects of ionic liquid on sludge hydrolysis and SCFAs production were evaluated.The results showed that the addition of ionic liquid[Emim]OTF significantly enhanced sludge hydrolysis,increased SCFAs production,and inhibited gas production.At ionic liquid dosage of 0.1g/g VSS,the maximum SCFAs production was 226.4mg COD/(g TS),which was 3.75times that of the untreated sludge.Analysis of microbial diversity revealed that addition of ionic liquid[Emim]OTF enriched hydrolytic acid-producing bacteria and strengthened the sludge hydrolysis and acidification processes,which in turn led to the increase in SCFAs production.

关 键 词：离子液体 剩余活性污泥 污泥厌氧发酵 短链脂肪酸 

分 类 号：X705[环境科学与工程—环境工程]