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;较低的总同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.%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 temporature[(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.
展开▼
