添加剂对污泥厌氧消化性能的影响

Influence of additives on anaerobic digestion of sludge

在间歇培养条件下,研究了还原型辅酶Ⅱ(NADPH)、乙酰辅酶A(Acetyl Co A)和对氨基苯甲酸(PABA)3种添加剂对污泥厌氧消化性能的影响.结果表明,3种微生物活性促进剂均能促进污泥厌氧消化产气.其中,NADPH的促进效果最为显著,消化第35 d,产甲烷量比对照组高15.90%.在污泥含固率为3%、未调初始pH(pH=6.7)和温度35℃的厌氧消化条件下,NADPH的最佳添加量为50 mg.L-1,消化第36 d,污泥累积产甲烷量127.13 mL.g-1VSS.在含固率3%、初始pH=8.5、温度55℃和NADPH添加量为50 mg.L-1的工艺条件下,污泥厌氧产气效果最佳,消化第30 d时累积产甲烷量达158.02 mL.g-1VSS.

This study investigated the effects of different additives（NADPH,Acetyl Co A,PABA）on biogas production in anaerobic digestion system.All the three microbial activity accelerants favored the anaerobic digestion,and NADPH achieved the most effective promotion for methane production.The reactor with NADPH had higher methane production,up to 15.90%,than the control group.Under the anaerobic conditions of 3%solid content,initial pH 6.7 for raw sludge and 35 ℃ digestion temperature,the optimal dosage of NADPH is 50 mg · L-1,and the accumulative methane production achieved 127.13 mL · g-1VSS after digestion for 36 days.The maximal accumulative methane production achieved 158.02 mL · g-1VSS under the following conditions： 3% solid content,initial sludge pH 8.5,temperature 55 ℃ and NADPH dosage 50 mg · L-1.