Hydrothermal alkali pretreatment contributes to fermentative methane production of a typical lipid from food waste through co-production of hydrogen with methane

被引:23
作者
Cheng, Jun [1 ]
Yue, Liangchen [1 ]
Hua, Junjie [1 ]
Dong, Haiquan [1 ]
Zhou, Junhu [1 ]
Li, Yu-You [2 ]
机构
[1] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Peoples R China
[2] Tohoku Univ, Dept Civil & Environm Engn, Sendai, Miyagi 9808579, Japan
关键词
Food waste; Typical lipid; Methane yield; Anaerobic digestion; Dark hydrogen fermentation; Hydrothermal alkali pretreatment; MUNICIPAL SOLID-WASTES; ANAEROBIC-DIGESTION; BIOHYDROGEN PRODUCTION; CO-FERMENTATION; BIOGAS PRODUCTION; OIL; BIOMASS; DEOXYGENATION; ENHANCEMENT; BIOMETHANE;
D O I
10.1016/j.biortech.2020.123164
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
In order to relieve the suppression problems of methanogenesis with microorganisms surrounded by undegraded lipids in food waste, hydrothermal alkali pretreatment was utilized to degrade lipids for promoted methane production through the co-production process of hydrogen with methane. GC-MS results demonstrated that oleic acids and hexadecanoic acids derived from degraded glycerol trioleate increased (from 43.29% to 58.22%, and from 1.06% to 8.25%, respectively) when the pretreatment temperature was increased from 160 degrees C to 220 degrees C. SEM, TEM and FTIR analyses showed that the pre-treatment at 220 degrees C effectively degraded 87.56% of glycerol trioleate and drastically relieved the covering of methanogens by non-degraded lipids. The methane yield and the production peak rate of glycerol trioleate also increased (from 636.85 to 877.47 mL CH4/g-total volatile solid (VS), and from 32.60 to 51.22 mL CH4/g-VS/d, respectively), which led to an increased energy conversion efficiency from 48.05% to 66.21% through the co-production of hydrogen with methane.
引用
收藏
页数:8
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