Anaerobic co-digestion of thermo-alkaline pretreated microalgae and sewage sludge: Methane potential and microbial community

作     者：Jiaqi Fu Bing Yan Shuanglin Gui Yinxuan Fu Song Xia Jiaqi Fu;Bing Yan;Shuanglin Gui;Yinxuan Fu;Song Xia

作者机构：Institute of Energy ResearchJiangxi Academy of SciencesNanchang 330096China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第127卷第5期

页      面：133-142页

核心收录：

学科分类：0710[理学-生物学] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 08[工学] 0703[理学-化学] 0713[理学-生态学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.32060096 and 31700311) the Jiangxi Provincial Natural Science Foundation(No.20212BAB213042). 

主　　题：Anaerobic co-digestion Thermo-alkaline pretreatment Microalgae Sewage sludge Microbial community 

摘      要：To improve methane production from sewage sludge(SS),co-digestion of SS and microalgae(MA)was studied and the application of thermo-alkaline pretreatment to MA was evaluated.The results showed that thermo-alkaline pretreatment at 90℃ for 120 min on MA was the optimum pretreatment condition.Furthermore,when the volatile solids(VS)ratio of SS and MA was 1:2,the methane yield reached maximum(368.94 mL/g VS).Fourier transform infrared(FT-IR)and thermogravimetric analysis confirmed the synergetic effects of thermoalkaline pretreated MA on its co-digestion with SS.The analyses of microbial community indicated that Methanobacterium and Methanosarcina were the dominant methanogens during the co-digestion process.However,the relative abundance of Methanosarcina in thermoalkaline pretreated groups was higher compared to unpretreated groups.The microbial community structure might be affected by thermo-alkaline pretreatment rather than by the MA dosage in the co-digestion.