Co-fermentation of whey permeates and cattle slurry using a partitioned up-flow anaerobic digestion tank
Co-fermentation of whey permeates and cattle slurry using a partitioned up-flow anaerobic digestion tank
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DOI：
10.1016/j.energy.2019.07.051
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发表时间：
2019-10
期刊：
影响因子：
9
通讯作者：
Michael O. Fagbohungbe;Chidinma. Onyeri;K. Semple
中科院分区：
文献类型：
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作者：
Michael O. Fagbohungbe;Chidinma. Onyeri;K. Semple
乳清渗透物和浆液都来自奶牛场的动物，而乳清的特点是高酸性，浆液是弱碱性的，它们都是可生物降解的。本研究采用实验室规模的分区升流式厌氧消化池，以实现乳清透过液和乳清浆共发酵的适宜进料制度。分区升流式厌氧消化池处理效果稳定，糖去除率达95%以上，总挥发性脂肪酸浓度低于150 mg/L。反应器的成熟比低于0.4，表明具有较强的缓冲稳定性。随着投饵比例从1：1增加到4：1，沼气产量急剧增加，最大值为3.5 L/d。甲烷含量的情况并非如此，随着饲喂方案从2：1增加到4：1，甲烷含量继续减少。2：1的进料方案记录了在40%和50%之间的最高甲烷组成，这表明这是使用分区上流式厌氧消化罐共发酵乳清渗透物和浆料的最佳进料方案。
Whey permeate and slurry are both from the dairy farm animals while whey is characterised with high acidity the slurry is mildly alkaline, and they are both biodegradable. In this study, a lab-scale partitioned up-flow anaerobic digestion tank was used to achieve a suitable feeding regime for co-fermenting whey permeate and slurry. The partitioned up-flow anaerobic digestion tank provided a stable treatment performance with over 95% of sugar reduction and a total volatile fatty acid concentration under 150 mg/L. The ripely ratio of the reactor was below 0.4 which suggest strong buffering stability. Biogas production surged with an increase in the feeding regime from 1:1 to 4:1 with a maximum value of 3.5 L/d. This was not the case for the methane content which continued to reduce as the feeding regime increased from 2:1 to 4:1. The feeding regime of 2:1 recorded the highest methane composition between 40 and 50% which suggests this is the best feeding regime for co-fermenting whey permeate and slurry using a partitioned up-flow anaerobic digestion tank.