Continuous H2 and CH4 production from high-solid food waste in the two-stage thermophilic fermentation process with the recirculation of digester sludge

被引：193

作者：

Lee, Dong-Yeol ^{[1
]}

Ebie, Yoshitaka ^{[1
]}

Xu, Kai-Qin ^{[1
]}

Li, Yu-You ^{[2
]}

Inamori, Yuhei ^{[3
]}

机构：

[1] Natl Inst Environm Studies, Res Ctr Mat Cycles & Waste Management, Tsukuba, Ibaraki 3058506, Japan

[2] Tohoku Univ, Dept Civil & Environm Engn, Sendai, Miyagi 9808579, Japan

[3] Fukushima Univ, Fac Symbiot Syst Sci, Fukushima 9601296, Japan

来源：

BIORESOURCE TECHNOLOGY | 2010年 / 101卷

关键词：

Two-stage process; Thermophilic fermentation; Hydrogen; Methane; Organic loading rate; BIOLOGICAL HYDROGEN-PRODUCTION; BIOHYDROGEN PRODUCTION; ANAEROBIC-DIGESTION; METHANE PRODUCTION; FEASIBILITY; PROSPECTS; SYSTEM; PH;

D O I：

10.1016/j.biortech.2009.03.037

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A thermophilic two-stage fermentation process using 10% total solids (TS) food waste was tested at varying organic loading rates (OLRs). The system was configured to produce H-2 and CH4 in conjugation with the chemical oxygen demand (COD), nitrogen removal, and adjustment of the pH by returning sludge as an alkali buffer from the sludge storage tank for denitrification. The pH in the H-2 fermentation reactor was maintained in the range of 5.4-5.7 using sludge recirculation (Q(r)/Q(i) ratio 1). The average H-2 (11.1 I-H-2 l(-1)-fed d(-1)) and CH4 (47.4 I-CH4 l(-1)-fed d(-1)) production rates were achieved at OLRs of 39 (H-2 fermentation reactor) and 4.16 gCOD l(-1) d(-1) (CH, fermentation reactor), respectively. These results suggest that long-term stability of the continuous two-stage process can be successfully achieved by recirculation of high-alkalinity sludge of 6.7-7.5 g l(-1) as CaCO3, without any added external chemical buffer. (C) 2009 Elsevier Ltd. All rights reserved

引用

页码：S42 / S47

页数：6