不同接种量对稻秆厌氧发酵特性的影响

以稻秆为原料,厌氧发酵后剩余的沼液为接种物,在中温35℃的条件下,采用批式发酵试验,研究接种量分别为40、80、120 g 3个处理对其产气特性的影响。结果表明,适量的接种物可以提高消化系统的缓冲能力,有利于产气高峰提前,同时对稻秆的降解有促进作用。其中接种量为80 g的总产气量最高,为3 452 mL;TS产气量达到256.27 mL·g-1;分别比接种量为40和120 g的试验组高93.71%和15.14%。

Effect of different inoculum concentrations on anaerobic fermentation char acteristics from rice straw

Using rice straw as raw material and the biogas slurry as inoculum,a batch fermentation test was operated at inoculum weight of 40 g,80 g and 120 g.Characteristics of biogas production were studied,and the results showed that: the appropriate amount of inoculum could improve the buffering capacity of the digestive system,was conducive to the gas production peak ahead,and simultaneously had a role in promoting the degradation of rice straw.The highest total gas production was reached at inoculum weight of 80 g and was 3 452 mL.TS biogas production reached 256.27 mL·g-1,93.71% and 15.14% higher than that of 40 g and 120 g,respectively.