药用活性炭再生处理及对秸秆沼气发酵的影响

Regeneration of Medicinal Activated Carbon and Its Effect on Biogas Fermentation of Straw

活性炭作为发酵吸附剂应用于沼气发酵过程,可缩短发酵时间,提高沼气产量,但因活性炭成本较高,难于在实际生产中广泛使用。文章研究将制药工业中使用的活性炭,通过再生处理后运用于沼气发酵,既解决了药用活性炭的污染问题,变废为宝,为废弃药用活性炭找到新去处,又能降低沼气的生产成本,提高产气量。结果表明:在水稻秸秆与玉米秸秆的发酵过程中,采用再生的药用活性炭混合体系,能够对提高发酵总产气量起到显著效果,使用再生活性炭混合物作为发酵添加剂的累积产气量,比使用新活性炭发酵总产气量分别提高了20.5%和19.8%;比使用未再生的活性炭发酵总产气量分别提高47.6%和44.7%;比不使用活性炭发酵总产气量分别提高65.4%和56.5%。

Activated carbon is used as a fermentation adsorbent in the biogas fermentation process,which can shorten the fermentation time and increase the biogas production. However,due to the high cost of activated carbon,it is difficult to be widely used in actual production. In our study,the activated carbon used in the pharmaceutical industry was applied to biogas fermentation after regeneration treatment,which could solve the pollution problem of medicinal activated carbon,and reduce the biogas production cost. The results showed that,in the fermentation process of rice straw and corn straw,the use of regenerated medicinal activated carbon had a significant effect on increasing the total gas production: the cumulative gas production wrer 20.5% and 19.8% higher with the new activated carbon as additives,47.6% and 44.7% higher than that using the un-regenerated medicinal activated carbon,and 65.4% and 56.5% higher than that without using the activated carbon,respectively.