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以天冬、防己和生地混合中药渣为发酵原料,分别采用固态(TS含量20%)和湿式(TS含量5%)2种发酵工艺,对经过微生物强化预处理的实验组药渣及未经过处理的对照组药渣进行沼气发酵,在35℃条件下,研究其产气潜力。在同为固态发酵工艺时,实验组药渣,产气量为1 900 mL,对照组药渣仅产气350 mL,固态发酵中实验组及对照组产气时间主要集中在前2天;而同为湿式发酵工艺时,实验组在整个实验周期产气共持续27 d,产气量为12 810 mL,对照组持续产气12 d,产气量为3 610 mL。实验结果表明,通过微生物的强化预处理均能大幅提高混合中药渣的产气率,混合中药渣经过预处理后采用湿式发酵工艺具有较好的产气潜力,其TS产气率为:0.346 m3/kg,而对照组TS产气率只有0.097 m3/kg,而固体发酵工艺并不适用于该混合中药渣的沼气发酵。
As raw materials were mixed as raw materials of asparagus, arborvitae and raw materials, the two kinds of fermentation processes, solid state (TS content 20%) and wet type (TS content 5%), The treated control group dregs were biogas fermented to study the gas production potential at 35 ℃. In the same solid state fermentation process, the experimental group dregs, the gas production was 1 900 mL, the control group dregs only gas 350 mL, the solid gas fermentation experimental group and control group gas production time mainly concentrated in the first 2 days; For the wet fermentation process, the experimental group produced gas for 27 days in total, and the gas production was 12 810 mL. The control group continued to produce gas for 12 days and the gas production was 3 610 mL. The experimental results show that the gas production rate of mixed Chinese medicine residues can be significantly increased by the pretreatment of microorganisms, and the gas production potential of mixed traditional Chinese medicine residue prepared by the wet fermentation process after pretreatment has a good TS gas production rate of 0.346 m3 / kg, while the control group TS gas production rate of only 0.097 m3 / kg, while the solid fermentation process is not suitable for the mixed biogas residue fermentation.