Anaerobic co-digestion of sewage sludge with shredded grass from public green spaces
Anaerobic co-digestion of sewage sludge with shredded grass from public green spaces
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DOI：
10.1016/j.biortech.2012.12.068
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发表时间：
2013-02-01
影响因子：
11.4
通讯作者：
Uchida, Tsutomu
中科院分区：
文献类型：
--
作者：
Hidaka, Taira;Arai, Sayuri;Uchida, Tsutomu
通过切碎实验、间歇式和连续式中温厌氧发酵实验，对城市公共绿地与污泥共消化过程进行了研究。通过市售粉碎机粉碎的长度为20 mm以下的草的比例为93%。在分批实验中，甲烷产量为约0.2NL/gVS-草。以污泥和草丝为原料的连续试验稳定运行了81 d。当污泥和草的TS比为10：1时，平均甲烷产量为0.09 NL/gVS-草。该值小于使用牧草青贮的其他报道，但本研究中的牧草物种未进行管理，并且收集的牧草在进料至反应器之前仅被切碎而未青贮，以进行简单操作。在沼气池中添加草可以改善碳氮比、甲烷产量和脱水性能。(C)2013爱思唯尔有限公司版权所有。
Adding greenery from public spaces to the co-digestion process with sewage sludge was evaluated by shredding experiments and laboratory-scale batch and continuous mesophilic anaerobic fermentation experiments. The ratio of the shredded grass with 20 mm or less in length by a commercially available shredder was 93%. The methane production was around 0.2 NL/gVS-grass in the batch experiment. The continuous experiment fed with sewage sludge and shredded grass was stably operated for 81 days. The average methane production was 0.09 NL/gVS-grass when the TS ratio of the sewage sludge and the grass was 10:1. This value was smaller than those of other reports using grass silage, but the grass species in this study were not managed, and the collected grass was just shredded and not ensiled before feeding to the reactor for simple operation. The addition of grass to a digester can improve the carbon/nitrogen ratio, methane production and dewaterability. (C) 2013 Elsevier Ltd. All rights reserved.