Promoting anaerobic digestion by algae-based hydrochars in a continuous reactor

被引：27

作者：

Wang, Fengbo ^{[1
]}

Wang, Jing ^{[1
]}

Li, Zelong ^{[1
]}

Zan, Shuaijun ^{[1
]}

Du, Miaomiao ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Environm Sci & Technol, Minist Educ, Key Lab Ind Ecol & Environm Engn, Dalian 116024, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2020年 / 318卷

基金：

中国国家自然科学基金;

关键词：

Microalgae; Macroalgae; Hydrochar; Anaerobic digestion; Organic loading rate; INTERSPECIES ELECTRON-TRANSFER; WASTE ACTIVATED-SLUDGE; MICROBIAL COMMUNITY; METHANE PRODUCTION; HYDROTHERMAL CARBONIZATION; GEN; NOV; ENHANCEMENT; PERFORMANCE; ADDITIVES; ACID;

D O I：

10.1016/j.biortech.2020.124201

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The microalgae and macroalgae-based hydrochars produced by hydrothermal carbonization were mainly used as biofuels, however, their application in anaerobic digestion (AD) was little known. This study investigated the effects of microalgae Chlorella-based hydrochar (HC-C) and macroalgae Laminaria-based hydrochar (HC-L) on a continuous AD reactor under different organic loading rates (OLR). The AD process stability of hydrochars supplemented reactors were performed well under the increase of OLR from 2.6 to 6.5 g COD/L/d, and HC-C and HC-L addition could significantly enhance the daily methane yield by 36.0% and 31.4%, respectively. Interestingly, the possible mechanisms of HC-C and HC-L on the enhanced AD were similar, namely increasing sludge granulation, promoting the Methanothrix relative abundance and key enzyme activities, and further facilitating potential direct interspecies electron transfer between methanogens and organic-degrading bacteria. This study provided an implication on the potential application of algae-based hydrochars in wastewater treatment and energy recovery.

引用

页数：8

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