梧州市生活垃圾高固体厌氧发酵产甲烷

以梧州市的生活垃圾为原料,针对其难降解部分含量相对较高的特点,进行高浓度中温(35±2)℃]批式厌氧消化实验,主要研究TS的3个设置浓度对厌氧消化稳定性及性能的影响.结果表明,分别为20%、25%和30%的3种TS均能实现稳定的产甲烷过程,在整个过程中没有明显产生挥发性脂肪酸的抑制,pH能实现自稳态调控;TS为20%、25%和30%的厌氧消化的累积产甲烷量为93.06、105.92和117.23L/kgVS;较低的总固体浓度有助于缩短厌氧发酵周期,而较高浓度可提高产甲烷效率.

High solid anaerobic digestion of municipal solid waste from Wuzhou

Municipal solid waste from Wuzhou was sampled and its composition and biochemical characteristics were analyzed. The effect of three different substrate concentration (TSr=20%, 25%,30%) on batch anaerobic digestion was investigated at mesophilic temperature(35+2)℃]. The experiment results showed that all three digestions were stable with no inhibition of volatile fatty acids and ammonia. The pH was stable at 7.0~7.8 without control. The cumulative methane productions were 93.06, 105.92 and 117.23 L/kgVS for TSr of 20%, 25% and 30% respectively. Lower total solids concentration could help reduce the anaerobic fermentation period, while higher concentration could increase the methane yield.