Aalborg University Copenhagen, Ballerup, Denmark.
Water Sci Technol. 2012;66(8):1751-8. doi: 10.2166/wst.2012.298.
The potential of a new concept to enable economically feasible operation of manure-based biogas plants was investigated at laboratory scale. Wet explosion (WEx) was applied to the residual manure fibers separated after the anaerobic digestion process for enhancing the biogas yield before reintroducing the fiber fraction into the biogas reactor. The increase in methane yield of the digested manure fibers was investigated by applying the WEx treatment under five different process conditions. The WEx treatment at 180 °C and a treatment time of 10 min without addition of oxygen was found to be optimal, resulting in 136% increase in methane yield compared with the untreated digested manure fibers in batch experiments. In a continuous mesophilic reactor process the addition of WEx-treated digested fibers in co-digestion with filtered manure did not show any signs of process inhibition, and the overall methane yield was on average 75% higher than in a control reactor with addition of non-treated digested fibers.
研究了一种新的概念，以实现基于粪便的沼气厂经济可行的运行。在实验室规模下，对厌氧消化过程后分离出的剩余粪便纤维进行湿式爆炸（WEx）处理，以提高纤维部分重新引入沼气反应器前的沼气产量。通过在五种不同的工艺条件下应用 WEx 处理，研究了消化后粪便纤维的甲烷产量增加情况。在 180°C 的 WEx 处理和 10 分钟的处理时间下不添加氧气被发现是最佳的，与分批实验中未经处理的消化粪便纤维相比，甲烷产量增加了 136%。在连续的中温反应器工艺中，将 WEx 处理的消化纤维与过滤后的粪便一起添加进行共消化，没有显示出任何过程抑制的迹象，并且整体甲烷产量平均比添加未经处理的消化纤维的对照反应器高 75%。
