Co-fermentation of sewage sludge and lignocellulosic biomass for production of medium-chain fatty acids

被引:34
作者
Yin, Yanan [1 ]
Hu, Yuming [1 ]
Wang, Jianlong [1 ,2 ]
机构
[1] Tsinghua Univ, Lab Environm Technol, INET, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Beijing Key Lab Radioact Waste Treatment, INET, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
Co-fermentation; Medium-chain fatty acids; Sewage sludge; Lignocellulosic biomass; Functional enzymes analysis; WASTE ACTIVATED-SLUDGE; HYDROGEN-PRODUCTION; DILUTE ETHANOL; PRETREATMENT; MICROBIOMES; ELONGATION; WATER;
D O I
10.1016/j.biortech.2022.127665
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Medium-chain fatty acids (MCFAs) production from sewage sludge and lignocellulosic biomass (fallen leaves and grass) was explored. Co-fermentation of sludge and lignocellulosic biomass significantly accelerated the caproate production and promoted the longer-chain MCFAs formation. Co-fermentation of sludge and grass achieved the highest caproate production of 89.50 mmol C/L, which was 18.04 % and 41.73 % higher than the mono -fermentation of grass and sludge, respectively. Co-fermentation of sludge and leaves produced 63.80 mmol C/ L caproate, which was 11.09 % and 1.03 % higher than the mono-fermentation of leaves and sludge, respectively. Microbial analysis showed that co-fermentation enriched CE microbes like genus Clostridium_sensu_stricto_13, Caprocipiproducens, Terrisporpbacter and Praraclostridium, and suppressed the competitive microbes like genus norank_f_Caldilineaceae and Desulfomicrobium. Functional enzymes analysis revealed that co-fermentation of sludge and leaves promoted MCFAs production through strengthening reverse ?? oxidation (RBO) pathway, while co-fermentation of sludge and grass stimulated MCFAs production by strengthening fatty acid biosynthesis (FAB) pathway.
引用
收藏
页数:11
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