Impacts of medium composition and applied current on recovery of volatile fatty acids during coupling of electrodialysis with an anaerobic digester

被引：34

作者：

Dai, Kun ^{[1
,2
]}

Wen, Jun-Li ^{[2
]}

Wang, Yi-Lun ^{[2
]}

Wu, Zhi-Gang ^{[2
]}

Zhao, Pei-Jun ^{[2
]}

Zhang, Han-Hui ^{[2
]}

Wang, Jin-Jing ^{[2
]}

Zeng, Raymond Jianxiong ^{[1
]}

Zhang, Fang ^{[1
,2
]}

机构：

[1] Fujian Agr & Forestry Univ, Coll Resources & Environm, Fujian Prov Key Lab Soil Environm Hlth & Regulat, Fuzhou 350002, Fujian, Peoples R China

[2] Yanshan Univ, Sch Environm & Chem Engn, Hebei Key Lab Appl Chem, Qinhuangdao 066004, Hebei, Peoples R China

来源：

JOURNAL OF CLEANER PRODUCTION | 2019年 / 207卷

基金：

中国国家自然科学基金;

关键词：

Acetate; Anaerobic digestion; Applied current; Electrodialysis; Medium; Propionate; MIXED CULTURE FERMENTATION; IN-SITU COMBINATION; LACTIC-ACID; BIPOLAR MEMBRANES; POWER-GENERATION; FOOD WASTE; ACETATE; DESALINATION; REMOVAL; GLUCOSE;

D O I：

10.1016/j.jclepro.2018.10.019

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The accumulation of volatile fatty acids (VFAs) lowers anaerobic digestion (AD) performance. In this study, electrodialysis (ED) was coupled with AD to remove VFAs. The results show that acetate and propionate were removed once the current was applied during ED even in the presence of medium. However, current efficiency was <70%. Energy consumption was higher under a lower VFA concentration, and the maximum value reached 46.0 kW h/kg-acetate. Ethanol diffusion was not detected during laboratory-scale ED. The acetate removal percentage was about 40% in the ED-AD system, which was much faster than that of AD. However, the applied current significantly reduced bacterial activity, and no methane production was detected during the 50 days after the ED experiment. Therefore, separating the anaerobes from the fermentation broth before ED is necessary to maintain bacterial activity during AD. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：483 / 489

页数：7

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