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为了考察玉米秸秆水解残渣(Unhydrolyzed solid,UHS)的厌氧消化产甲烷潜力,研究了接种物类型、接种比例以及发酵温度对UHS产气性能的影响。结果表明,餐厨垃圾厌氧消化液作为接种物时,UHS具有较高的产气能力,累积甲烷产量达到208.06 m L·g~(-1)VS;UHS的累积甲烷产量与接种物对底物的比值(Inoculum to substrate ratios,RI/S)有关,其值随着接种比例的减小而逐渐降低,当接种比例RI/S为0.1∶1~3∶1时,累积甲烷产量为111.20~224.48 m L·g~(-1)VS,UHS的生物降解率为27.89%~56.29%,其降解能力随着底物浓度的升高而降低;在高温发酵(55℃)和中温发酵(35℃)条件下,相同接种比例的对照组中,UHS累积甲烷产量较为接近,但高温发酵的产气速率明显高于中温发酵。
In order to investigate the methane potential of anaerobic digestion of Unhydrolyzed solid (UHS), the effects of inoculum type, inoculum ratio and fermentation temperature on the gas production performance of UHS were studied. The results showed that when anaerobic digestion solution of food waste was used as inoculum, UHS had high gas production capacity, and the cumulative methane production reached 208.06 m L · g -1 (VS). The accumulated methane yield of UHS and inoculum (Inoculum to substrate ratios, RI / S), the value decreased gradually with the decrease of inoculation ratio. When the inoculation ratio RI / S was 0.1: 1 ~ 3: 1, the cumulative methane yield was 111.20 ~ The biodegradation rate of UHS at 224.48 m L · g -1 (VS) was 27.89% -56.29%, and its biodegradability decreased with the increase of substrate concentration. Under high temperature (55 ℃) and medium temperature (35 ℃) ℃), the cumulative methane yield of UHS was similar in the control group with the same inoculation ratio, but the gas production rate of high-temperature fermentation was obviously higher than that of medium-temperature fermentation.