期刊
WASTE MANAGEMENT
卷 29, 期 7, 页码 2042-2050出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2008.12.023
关键词
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资金
- National Natural Science Foundation of China [50708069]
- National High-Tech Research and Development Program of China [2008AA062401]
- National Key Technology RD Program [2008BAJ08B13]
- Key Project of Chinese Ministry of Education [107122]
In this study, the effects of micro-aeration and liquid recirculation on the hydrolysis of vegetable and flower wastes during two-phase solid-liquid anaerobic digestion were assessed. To accomplish this, we evaluated the hydrolysis of five batches of waste that were treated under the following conditions: anaerobic, insufficient micro-aeration (aeration for 5 min every 24 h), and sufficient micro-aeration (aeration for 5 min every 12, 4 and 1 h). Hydrolysis was found to depend on the level of micro-aeration. Specifically, insufficient micro-aeration led to unstable and decreased performance. Conversely, sufficient micro-aeration promoted the hydrolysis of easily biodegradable carbohydrates and proteins, but the microbial activity was later impaired by liquid recirculation using methanogenic effluent. The hydrolysis efficiency under anaerobic conditions was comparable to the efficiency observed under sufficient microaeration, while the cumulative TOC of the anaerobic batch was 1.4-2.4 times higher than that of the micro-aerated batches. In addition, liquid recirculation did not have a negative effect on the development of microbial activity under anaerobic conditions. which resulted in the lignocelluloses having a higher hydrolysis efficiency. (C) 2008 Elsevier Ltd. All rights reserved.
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