甜高粱发酵产沼气的试验研究

Experimental research of biogas production from sweet sorghum

为了探究甜高粱厌氧消化产沼气的潜力,采用批量发酵工艺,在恒温(30±0.2)℃的条件下,进行了甜高粱茎秆和甜高粱穗的沼气发酵试验。结果表明,甜高粱茎秆和穗的发酵周期分别为36、40 d;实际工程中,甜高粱发酵产沼气的水力滞留时间(HRT)可设计为22 d。甜高粱茎秆的TS产气率、VS产气率分别为583、618mL·g^(-1);甜高粱穗的TS产气率、VS产气率分别为899、950 mL·g^(-1)。

The experiment was conducted with batch fermentation in(30 ± 2) ℃ to explore the potential of biogas production of sweet sorghum. The results showed that the fermentation period of sweet sorghum was 36 days( stem) and 40 days( panicle),respectively; and in engineering,its hydraulic retention time can be designed for 22 days. Biogas generation rate of its stem and panicle was 583 mL·g^(-1) TS,618 mL·g^(-1) VS and 899 mL·g^(-1) TS,950 mL·g^(-1) VS respectively.