Initiating methanogenesis of vegetable waste at low inoculum-to-substrate ratio: Importance of spatial separation
Initiating methanogenesis of vegetable waste at low inoculum-to-substrate ratio: Importance of spatial separation
复制标题
在低接种物与底物比率下启动蔬菜废物的产甲烷作用：空间分离的重要性
DOI：
10.1016/j.biortech.2011.11.104
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发表时间：
2012-02-01
影响因子：
11.4
通讯作者：
He, Pinjing
中科院分区：
文献类型：
--
作者：
Lu, Fan;Hao, Liping;He, Pinjing
以以最少接种量启动易生物降解废物的产甲烷为目标，研究了完全混合系统和接种物与废物空间分离系统中不同接种量与底物比(r(I/S))的差异。在完全混合的体系中，即使在高r(I/S)1.105的挥发性固体基础上，也很难引发甲烷生成。发酵效率与r(i/S)无关。在总r(I/S)为0.053的空间分离系统中，初始完全分离的接种物垃圾的最终甲烷产率(35℃，1atm)达到445mL/g-vs。在含有接种物的反应器中，当部分分离体系的比例控制在1.105、0.254和0.113时，产率分别降至285mLg-VS、181mLVS和34mLg-VS。这说明了在接种时设置接种物和废物之间的空间分隔的重要性。合适的接种方法即使在低接种量/底物比的情况下也能迅速启动产甲烷反应。(C)2011爱思唯尔有限公司。保留所有权利。
With the goal of starting-up the methanogenesis of easily biodegradable waste with minimum inoculum, the present work evaluated different inoculum-to-substrate ratios (r(I/S)) in completely mixed systems and in the systems with spatial separation of inoculum and waste. It was found difficult to initiate methanogenesis in the completely mixed systems, even at high r(I/S) 1.105 on a volatile solid basis. Fermentation efficiencies were independent of r(I/S). In the spatial-separation systems with a low total r(I/S) 0.053, the ultimate methane yield (35 degrees C, 1 atm) reached 445 mL/g-VS added for the inoculum-waste initially completely separated system. The yields decreased to 285, 181, and 34 mL/g-VS added, respectively, for partially separated systems with the ratios controlled at 1.105, 0.254, and 0.113 in the inoculum-containing reactors. This demonstrates the importance of setting spatial separation between inoculum and waste when inoculation is employed. An appropriate inoculation method would initiate methanogenesis rapidly even at low inoculum-to-substrate ratios. (C) 2011 Elsevier Ltd. All rights reserved.