Influence of the Feedstock Ratio and Organic Loading Rate on the Co-digestion Performance of Pennisetum hybrid and Cow Manure
Influence of the Feedstock Ratio and Organic Loading Rate on the Co-digestion Performance of Pennisetum hybrid and Cow Manure
复制标题
DOI：
10.1021/acs.energyfuels.8b00015
复制
发表时间：
2018-03
期刊：
影响因子：
5.3
通讯作者：
Lianhua Li;Ying Li;Yongming Sun;Zhenhong Yuan;Pengmei Lv;Xihui Kang;Yi Zhang;Gaixiu Yang
中科院分区：
文献类型：
--
作者：
Lianhua Li;Ying Li;Yongming Sun;Zhenhong Yuan;Pengmei Lv;Xihui Kang;Yi Zhang;Gaixiu Yang
通过间歇式试验研究杂交狼尾草与牛粪的共消化性能，以优化混合料的配比。在批试验结果的基础上，通过半连续模式，在中温温度和2.0-5.5 g挥发性固体（VS）L-1天-1的有机负荷率（OLR）下，评估了不同比例的共消化系统的长期运行性能。结果表明，当杂交狼尾草与牛粪的比例为100：0时，VS的比甲烷产率最高，为170.35 ± 11.61 mL/g VS，随着牛粪比例的增加，VS的比甲烷产率降低。在半连续试验中，杂交狼尾草的单消化在2.0 g VS L-1 day-1的OLR下失败。这种失败伴随着挥发性脂肪酸（VFA）的积累。添加牛粪后，稳定运行的OLR提高了1.0-1.5倍。在2.0 t/h的OLR条件下，容积产气量随着OLR的增加而增加。
This study investigated the co-digestion performance of Pennisetum hybrid and cow manure via batch mode tests to optimize the feedstock ratio. On the basis of the batch test results, the long-term operational performance of the co-digestion system at different ratios was assessed at mesophilic temperature and organic loading rates (OLRs) of 2.0–5.5 g of volatile solids (VS) L–1 day–1 via semi-continuous mode. Batch tests showed that the maximum specific methane yield of 170.35 ± 11.61 mL/g of VS was obtained at a Pennisetum hybrid/cow manure ratio of 100:0, with the specific methane yield decreasing with an increased proportion of cow manure. In the semi-continuous experiments, the mono-digestion of Pennisetum hybrid failed at the OLR of 2.0 g of VS L–1 day–1. This failure was accompanied by the accumulation of volatile fatty acids (VFAs). The stable operational OLR increased by 1.0–1.5 times with the addition of cow manure. The volumetric biogas yield increased with the augmentation of the OLR from 2.0 t...