A pH- and temperature-phased two-stage process for hydrogen and methane production from food waste
A pH- and temperature-phased two-stage process for hydrogen and methane production from food waste
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DOI：
10.1016/j.ijhydene.2008.06.060
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发表时间：
2008-09-01
影响因子：
7.2
通讯作者：
Kong, Hai-Nan
中科院分区：
文献类型：
--
作者：
Chu, Chun-Feng;Li, Yu-You;Kong, Hai-Nan
提出了高温产氢、中温产甲烷与污泥回流相结合的pH-阶段两段发酵工艺，并通过处理城市生活垃圾有机组分的连续实验验证了该工艺的处理效果。高温制氢反应器在水力停留时间（HRT）为1.3 d，负荷率为38.4 kg-VS/m（3）/d或64.4 kg-CODCr/m（3）/d的条件下运行。短的水力停留时间和低的pH值足以将产氢与产甲烷分开。在水力停留时间（HRT）为5.0 d，负荷为6.6 kg-VS/m（3）/d或16.3 kg-CODCr/m（3）/d的条件下，将高浓度有机酸的混合料浆转化为甲烷。实验持续了150多天，并且获得了同时产生氢气和甲烷的稳定性能。在本研究中，氢气和甲烷的产率分别为205 ml H-2/g VS添加和464 ml CH 4/g VS添加。(c)2008年国际氢能协会。由爱思唯尔有限公司出版。保留所有权利。
A pH-phased two-stage fermentation process combined thermophilic hydrogen production and mesophilic methane production with recirculation of the digested sludge was suggested in this study and its treatment performance was demonstrated by a continuous experiment treating organic fraction of municipal solid wastes (OFMSW). A thermophilic hydrogen production reactor was operated at a hydraulic retention time (HRT) of 1.3 days, corresponding to a loading rate of 38.4 kg-VS/m(3)/d or 64.4 kg-CODCr/m(3)/d. The short HRT and low pH applied here were enough to separate hydrogen production from methanogenesis. The mixed slurry with a high concentration of organic acids was then converted into CH4 by the mesophilic methane production reactor at a short HRT of 5.0 days, corresponding to a loading rate of 6.6 kg-VS/m(3)/d or 16.3 kg-CODCr/m(3)/d. The experiment was continued for over 150 days, and a stable performance for the simultaneous hydrogen and methane production was obtained. The yields of hydrogen and methane in this study were 205 ml H-2/g VS added and 464 ml CH4/g VS added, respectively. (c) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.