搅拌频率对粪秸高含固率连续产甲烷反应器启动性能的影响
发布时间：2019-03-09 14:11
【摘要】：为实现粪秸清洁化、高效化厌氧产甲烷,试验在自制的纤维质物料高含固率连续产甲烷反应器中,以油菜秸秆和牛粪为原料,在中温条件(37℃±1℃)下研究了2个搅拌频率(8 r·min~(-1)和35 r·min~(-1))对该反应器启动阶段产甲烷效率的影响。结果表明,在仅添加牛粪和出料回填的条件下,低频率搅拌反应器(R1)和高频率搅拌反应器(R2)均能在5 d后稳定产气,产甲烷效率没有显著差异。在牛粪和秸秆混合进料、含固率分别为10%和15%的条件下,低搅拌频率会提高反应器甲烷产率,且会使物料在反应器内产生更加明显的空间异质性,反应器上部VFAs浓度显著高于下部。当TS=10%,进料VS为0.46 kg·d~(-1)时,R1的平均比甲烷产率和容积甲烷产分别为123.54 L·kg~(-1)VS_(added)和1.13 L·d~(-1),比R2高11.08%和10.78%;当TS=15%,进料VS为0.69 kg·d~(-1)时,R1的平均特殊甲烷产率和容积甲烷产率分别为94.84 L·kg~(-1)VS_(added)和1.31 L·d~(-1),比R2高11.68%和11.82%。上述研究结果为该反应器利用粪秸在高含固率条件下实现快速启动和高效产甲烷提供了理论依据和工艺参数。
[Abstract]:In order to realize the clean and efficient anaerobic methanogenesis of manure straw, rape straw and cow dung were used as raw materials in a self-made continuous methane production reactor with high solid content of fibrous materials. The effects of two stirring frequencies (8 r 路min ~ (- 1) and 35 r 路min ~ (- 1) on the methane production efficiency in the start-up stage of the reactor were studied at medium temperature (37 鈩，
本文编号：2437534
[Abstract]:In order to realize the clean and efficient anaerobic methanogenesis of manure straw, rape straw and cow dung were used as raw materials in a self-made continuous methane production reactor with high solid content of fibrous materials. The effects of two stirring frequencies (8 r 路min ~ (- 1) and 35 r 路min ~ (- 1) on the methane production efficiency in the start-up stage of the reactor were studied at medium temperature (37 鈩，
本文编号：2437534
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