链霉素菌渣中温厌氧发酵产沼气性能研究

为实现链霉素菌渣的无害化、资源化利用,文章以链霉素菌渣为原料,在菌渣含固率为2%,温度为30±2℃的条件下进行60 d的厌氧发酵试验。试验结果表明:链霉素菌渣的累积产气量为18.20 L,中温产气能力为364.07 mL/g;在稳定产气阶段,发酵液的氨氮、VFAs含量均维持在较低水平,pH值大于7.0;厌氧发酵结束后,发酵液的VS去除率达64.32%;以金黄色葡萄球菌作为指示菌,在厌氧发酵后的沼液中未检测到链霉素残留。

Biogas production potential of streptomycin fermentation residue in mesophilic anaerobic digestion

In order to realize the harmless and resource utilization of streptomycin fermentation residue,the article used streptomycin fermentation residue as raw material and carried out anaerobic digestion test for 60 d under the condition of solid content of 2%and temperature of 30±2℃.The results showed that the cumulative biogas production of streptomycin fermentation residue was 18.20 L,and the biogas production capacity at mesophilic was 364.07 mL/g.In the stable biogas production stage,the ammonia nitrogen and VFAs in the fermentation process were maintained at a low level,and the pH value was above 7.0.After the end of anaerobic digestion,the removal rate of VS reached 64.32%.Staphylococcus aureus was used as an indicator bacteria,and no streptomycin residue was detected in the biogas slurry after anaerobic digestion.