Effect of alkali pretreatment time on kitchen waste anaerobic digestion performance enhanced by alkali pretreatment combined with bentonite: performance enhancement, microbial community structure, and functional gene analysis

被引：2
作者：
Hu, Fengping [1 ]
Fu, Ningxin [1 ]
Wei, Qun [1 ]
Liu, Susu [1 ,2 ]
Hu, Yuying [1 ]
Zhang, Shihao [1 ]
Wang, Xin [1 ]
Peng, Xiaoming [1 ]
Dai, Hongling [1 ]
Wei, Yang [1 ]
机构：
[1] East China JiaoTong Univ, Sch Civil Engn & Architecture, Nanchang 330013, Jiangxi, Peoples R China
[2] Jiangxi Prov Zhonggantou Survey & Design Co Ltd, Nanchang 330000, Jiangxi, Peoples R China
来源：
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2024年 / 31卷 / 05期
关键词：
Kitchen waste; Anaerobic digestion; Alkali pretreatment; Bentonite; Microorganism; Functional gene analysis;
D O I：
10.1007/s11356-023-31646-7
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Kitchen waste was mainly composed of carbohydrates, lipids, and proteins. Anaerobic digestion (AD) of kitchen waste usually occurred acidification and further deteriorated. In our previous study, alkali pretreatment combined with bentonite (AP/Be) treatment was proved to enhance high solid AD of kitchen waste. However, effects of AP time on AP/Be were not yet studied. This study investigated the effects of AP time on AP/Be treatment on enhancing high solid AD. The results showed that compared with the control group, the cumulative methane production rate could be increased by 3.30 times (149.7 mL CH4/g VS) and the volatile solids (VS) reduction rate increased by 63.36%. Microbial community analysis showed that the relative abundance of Methanosarcina and Methanosaeta were increased from 6.49 and 7.83% to 47.14 and 16.39% respectively. Predictive functional analysis showed that AP/Be treatment increased the abundance of energy production and conversion, coenzyme transport, and metabolism. This study revealed the potential mechanism of AP/Be enhanced kitchen waste AD performance and AP/Be was a potential strategy to strengthen AD.
引用
收藏
页码：7167 / 7178
页数：12
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