Bio-hythane production from cassava residue by two-stage fermentative process with recirculation.
Bio-hythane production from cassava residue by two-stage fermentative process with recirculation.
复制标题
通过两阶段再循环发酵工艺从木薯渣中生产生物乙烷。
DOI：
10.1016/j.biortech.2017.09.102
复制
发表时间：
2018
影响因子：
11.4
通讯作者：
Y. Li
中科院分区：
文献类型：
--
作者：
Hongyu Jiang;Yu Qin;S. Gadow;Akihiro Ohnishi;Naoshi Fujimoto;Y. Li
低蛋白、富铁、缺镍、钴的木薯渣两阶段沼气发酵，经过长期运行后，沼气产量沿着急剧下降，第二阶段挥发性脂肪酸（VFAs）积累增加。根据营养物质的理论需求量与现有营养物质含量之间的差距，通过重复分批试验和连续试验验证了营养物质的添加对沼气发酵的影响。在氮、硫、镍、钴的浓度分别为0.7g/L、30 mg/L、1.0mg/L和1.0mg/L时，可保证水解菌、产酸菌、产氢菌和产甲烷菌的增殖，恢复可持续的甲烷发酵代谢。在上述微量元素的最佳营养组合下，每吨木薯渣产甲烷426 m3，产氢27.7%。
The two-stage hythane fermentation of cassava residue low in protein, rich in iron, and deficient in nickel and cobalt, resulted in failure after long-term operation, showing a radical decrease in methane production along with an increase in volatile fatty acids (VFAs) accumulation in the second stage. Based on the gap between theoretical demand and existing content of nutrients, the effect of their additions on hythane fermentation was validated in the repeated batch experiment and continuous experiment. The proliferation of hydrolysis bacteria, acidogens, and hydrogen producing bacteria and methanogens was guaranteed by sufficient N (0.7 g/L), S (30 mg/L), Ni (1.0 mg/L), and Co (1.0 mg/L), and the metabolism of a sustainable hythane fermentation was recovered. In this optimal nutrient combination of above trace elements, the highest hythane yield (426 m3hythane with 27.7% of hydrogen from 1 ton of cassava residue) was obtained.