Hydrogen and methane production from untreated rice straw and raw sewage sludge under thermophilic anaerobic conditions
Hydrogen and methane production from untreated rice straw and raw sewage sludge under thermophilic anaerobic conditions
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DOI：
10.1016/j.ijhydene.2013.04.079
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发表时间：
2013-07-17
影响因子：
7.2
通讯作者：
Zhang, Zhenya
中科院分区：
文献类型：
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作者：
Kim, Mijung;Liu, Chunguang;Zhang, Zhenya
以污水污泥(SS)和稻草(RS)为原料，在高温条件下，通过间歇实验，比较了污泥(SS)和稻草(RS)共消化产生的生物质能与一段制甲烷(CH4)系统和两段制氢(H-2)和甲烷(CH4)联产系统的差异。在第一级发酵过程中，利用未经处理的RS和生SS进行H-2发酵，获得了高的H-2产率(21ml/g-vs)和稳定的H-2含量(60.9%)。直接利用H-2发酵后的残渣容易产生沼气，并在第二阶段甲烷发酵过程中显著提高甲烷产量(266ml/g-vs)和稳定的甲烷含量(75-80%)。总体而言，两级系统的挥发性固体脱除率(60.4%)和总生物质产率(8804J/g-vs)分别比单级系统高37.9%和59.6%。生物能源的高效生产被认为是由于协同改进的第二阶段过程，在一阶段系统中利用消化良好的H-2生成后的残留物。版权所有(C)2013，氢能源出版有限责任公司。爱思唯尔有限公司出版。保留所有权利。
Bioenergy produced from co-digestion of sewage sludge (SS) and rice straw (RS) as raw materials, without pretreatment and additional nutrients, was compared for the one-stage system for producing methane (CH4) and the two-stage system for combined production of hydrogen (H-2) and CH4 in batch experiments under thermophilic conditions. In the first stage H-2 fermentation process using untreated RS with raw SS, we obtained a high H-2 yield (21 ml/g-VS) and stable H-2 content (60.9%). Direct utilization of post-H-2 fermentation residues readily produced biogas, and significantly enhanced the CH4 yield (266 ml/g-VS) with stable CH4 content (75-80%) during the second stage CH4 fermentation process. Overall, volatile solids removal (60.4%) and total bioenergy yield (8804 J/g-VS) for the two-stage system were 37.9% and 59.6% higher, respectively, than the one-stage system. The efficient production of bioenergy is believed to be due to a synergistically improved second stage process exploiting the well-digested post-H-2 generation residues over the one-stage system. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.