关键词: 抗生素菌渣, 氨氮, 林可霉素, 高蛋白质类废物, 中温厌氧消化, 抑制程度

Abstract:

In order to utilize protein-rich bio-wastes from the process of lincomycin manufacturing,mesophilic anaerobic digestion experiments were conducted in a batch mode to evaluate the inhibitory effects of ammonia concentrations(300—4500 mg·L^-1)and lincomycin ones(0—100 mg·L^-1)on methane production by anaerobic digestion of the bio-wastes.The results show that both the concentrations of ammonia and lincomycin had significant negative correlations with the cumulated amount of methane.After 240 h of batch incubation, the 50% effective inhibitory concentrations(EC₅₀)were 1445 mg·L^-1 and 35 mg·L^-1 for ammonia and lincomycin respectively, and 27—28 mg·L^-1 for free ammonia.Furthermore, there existed lincomycin in the system at concentration of 25 mg·L^-1, the inhibitory trend and level of ammonia on anaerobic digestion were the same as that without lincomycin.Therefore, the inhibition of ammonia on anaerobic digestion is independent of lincomycin.

Key words: 抗生素菌渣, 氨氮, 林可霉素, 高蛋白质类废物, 中温厌氧消化, 抑制程度