Abstract：
Municipal waste has the potential to be a significant source of energy production. This study investigated pretreatment methods such as NaOH, hydrothermal, and ozonation to increase biomethane production from municipal waste. In addition, these pretreatments were further evaluated using ultrasonic pretreatment after achieving optimal conditions by RSM CCD methods. The optimum pretreatment conditions were observed to be 8% NaOH concentration, 132 °C hydrothermal temperature, and O3 equal to 0.19 g/g TS. The maximum biomethane produced and achieved during the tests was 394 mL/kg TS, which increased to 410 mL/kg TS after ultrasonic pretreatment. The best sCOD reduction in the optimal pretreatment conditions and after the ultrasonic pretreatment was 87% and 91%, respectively. Also, in the absence of ozone pretreatment, the highest yields of biomethane and biogas occurred at a 6.4% concentration of NaOH and a temperature of 135 °C; however, in the presence of ozone, the yield of biomethane and biogas produced was greater and the inhibitory effect of sodium hydroxide also occurs in higher amounts. Experiments have shown that ozonation increases biomethane production rather than increasing biogas production (hence the ratio of methane to biogas).
摘要：
城市垃圾有可能成为能源生产的重要来源。本研究调查了NaOH等预处理方法，热液,和臭氧化，以增加城市垃圾中的生物甲烷产量。此外,通过RSMCCD方法达到最佳条件后，使用超声预处理对这些预处理进行了进一步评估。观察到最佳预处理条件为8％NaOH浓度，132°C水热温度,和O3等于0.19g/gTS。测试过程中产生和达到的最大生物甲烷为394mL/kgTS，超声预处理后提高到410mL/kgTS。在最佳预处理条件下和超声预处理后的最佳sCOD降低率分别为87%和91%,分别。此外，在没有臭氧预处理的情况下，在NaOH浓度为6.4％，温度为135°C时，生物甲烷和沼气的产量最高；但是，在臭氧存在的情况下，产生的生物甲烷和沼气的产率较高，氢氧化钠的抑制作用也较高。实验表明，臭氧化增加了生物甲烷的产量，而不是增加了沼气的产量（因此甲烷与沼气的比例）。
