Investigates of substrate mingling ratio and organic loading rate of KOH pretreated corn stover and pig manure in batch and semi-continuous system:Anaerobic digestion performance and microbial characteristics  

作　　者：Chenyang Zhu Ruoran Qu Xiujin Li Xiaoyu Zuo Hairong Yuan 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Department of Environmental Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China [2]Sinochem Commerce Co.,Ltd,Beijing 100045,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第10期114-123,共10页中国化学工程学报（英文版）

基　　金：the fund supports from the Fundamental Research Funds for the Central Universities(JD2326).

摘　　要：The effects of substrate mingling ratio(SMR)(1:1,1:2,1:3,3:1,and 2:1)and organic loading rate(OLR)(50-90 g total solids per liter per day)on anaerobic co-digestion performance and microbial characteristics were investigated for pig manure(PM)and pretreated/untreated corn stover in batch and semicontinuous anaerobic digestion(AD)system.The results showed that SMR and pretreatment affected co-digestion performance.The maximum cumulative methane yield of 428.5 ml·g^(-1)(based on volatile solids(VS))was obtained for PCP13,which was 35.7%and 40.0%higher than that of CSU and PM.In the first 5 days,the maximum methane yield improvement rate was 378.1%for PCP13.The daily methane yield per gram VS of PCP13 was 11.4%-18.5%higher than that of PC_(U)13.Clostridium_sensu_stricto_1,DMER64,and Bacteroides and Methanosaeta,Methanobacterium,and Methanospirillum had higher relative abundance at the genus level.Therefore,SMR and OLR are important factor affecting the AD process,and OLR can affect methane production through volatile fatty acids.

关 键 词：Substrate mingling ratio Organic loading rate CO-DIGESTION Corn stover Pig manure Microbial community 

分 类 号：X71[环境科学与工程—环境工程] X172