摘要
为研究寒区猪粪厌氧发酵产沼气时化学促进剂对反应体系发酵产气的影响,文章进行了化学促进剂的筛选试验以及最佳组合的配比试验,最后进行现场工程投加示范。实验结果显示,除Mo外,添加微量元素和生长因子都改善了产气量,其中,以酵母粉与Fe,Co,Ni的组合最佳;在最佳组合的四因素中,对累计产气量影响程度依次为:酵母粉﹥Co﹥Fe﹥Ni;最优组合为Fe Cl2·4H2O∶Co Cl2·6H2O∶Ni Cl2·6H2O∶酵母粉=3∶1∶1∶1;工程现场投加0.01%化学促进剂后,在10天的沼气发酵观察中,容积产气率基本都维持在0.3 m3·m-3d-1以上,最高达0.37m3·m-3d-1。通过以上结果可知,添加化学促进剂(以酵母粉与Fe,Co,Ni的组合最佳),可以提高低温环境下厌氧发酵的沼气产量和产率,并具有经济可行性和实际效益。
The best combination and mixing ratio of chemical enhancer were screened, tested, and adopted in a demonstra- tion project, and the effect of chemical enhancer on biogas fermentation of pig manure in cold regions was studied in this study. The results of orthogonal test showed that the highest gas production and highest methane content was obtained with combination of Fe,Co,Ni and yeast powder with optimal ratio of FeCl2 · 4H2O： CoCl2 · 6H_2O： NiCl2 · 6H2O： yeast of 3：1： 1： 1. And the effect of the four enhancer on the cumulative gas production was yeast powder 〉 Co 〉 Fe 〉 Ni. With this optimal combination, 0.01% concentration of chemical enhancer was adopted in a field demonstration engineering un- der the low ambient temperature. The volumetric gas production could keep above 0.3 m^3 · m^-3d^-1 , and the maximum of 0. 37 m^3 · m^-3d^-1 was obtained. These results showed that the chemical enhancer could improve the biogas production in the pig fermentation system under low ambient temperature.
出处
《中国沼气》
北大核心
2015年第2期74-77,共4页
China Biogas
基金
国家水体污染控制与治理科技重大专项(2009ZX07212-004-03)
