温度对生物强化粪便污泥厌氧消化减量及产气特性的影响

以化粪池粪便污泥为对象,研究温度在25～45℃条件下,分别投加0.01%的有效微生物（EM）和多功能复合微生物制剂（MCMP）对粪便污泥厌氧消化减量及产气特性的影响。结果表明,温度对EM和MCMP强化粪便污泥厌氧消化挥发性固体（VS）的减量有重要影响,分别投加0.01%的EM和MCMP的两试验组的VS的去除率均表现为35℃时最好,45℃时次之,25℃时最差,且各处理间的差异均达到极显著水平（P〈0.01）。经过20d反应,35℃时,投加0.01%EM的处理（E-T35）的VS去除率为39.04%,分别比25℃（E-T25）和45℃（E-T45）时高21.57%和6.90%;投加0.01%MCMP的处理（M-T35）的VS去除率为42.04%,分别比25℃（M-T25）和45℃（M-T45）时高20.16%和8.59%。至20d反应结束,两试验组各处理累积产气量大小分别表现为E-T35（14220mL.L-1）〉E-T45（11819mL.L-1）〉E-T25（7607mL.L-1）、M-T35（17695mL.L-1）〉M-T45（9065mL.L-1）〉M-T25（7430mL.L-1）。由此可见,EM和MCMP强化粪便垃圾厌氧消化减量并同时提高沼气产量的较佳温度为35℃。

Effect of Temperature on Anaerobic Digestion Reduction and Biogas Yield of Septic Tank Nightsoil Sludge by Bioaugmentation

The effect of temperature on anaerobic digestion reduction and biogas production of septic tank nightsoil sludge was studied by adding effective microorganisms（EM） or multifunctional compound microorganisms preparation（MCMP）.Anaerobic digestion was augmentated with the addition of 0.01% dosing of EM and MCMP respectively.Our experimental results indicated that temperature had apparent effect on the removal rate of volatile solid（VS） and biogas production.At 35 ℃,by adding 0.01% EM or 0.01% MCMP,VS had the highest removal rate.At 45 ℃ or 25 ℃,the removal rates of VS were relatively lower compared with that at 35℃.The differences among them were statistically significant（P0.01）.After 20 days of anaerobic digestion,the removal rate of VS,augmented by adding 0.01% EM at 35 ℃（E-T35） was 39.04%.It was 21.57% and 6.90% higher compared with that at 45 ℃（E-T45） and 25 ℃（E-T25） respectively.For another group of experiments with adding of 0.01% MCMP for augmentation,the removal rate of VS at 35 ℃（M-T35） was 42.04%,which was 20.16% and 8.59% higher compared with that at 45 ℃（M-T45） and 25 ℃（M-T25）,respectively.The biogas production of the two experimental groups decreases gradually as following：E-T35（14 220 mL·L-1） E-T45（11 819 mL·L-1） E-T25（7 607 mL·L-1） and M-T35（17 695 mL·L-1） M-T45（9 065 mL·L-1） M-T25（7 430 mL·L-1）,respectively.Our experimental results indicated that the optimum temperature for night soil sludge anaerobic digestion as well as the increasing of biogas production is 35 ℃.