Food waste accounts for the largest fraction of municipal solid waste, and one-third of the food produced goes to waste. According to experts, the total food waste generation is expected to increase by 44%, by 2025. In this research, thermal, ultrasonic, and electrochemical pretreatments were used to enhance the solubilization and methane generation using food waste as the substrate. Different pretreatment conditions were examined to determine the optimum conditions for each pretreatment. The highest solubilization was observed at 20 V for 40 min with electrochemical pretreatment. Compared to the control, this was a 40–47% increase. For thermal pretreatment, 80 °C for 90 min, was selected as best conditions. The 2 W/mL for 30 min and 20 V for 40 min pretreatments were selected as the optimum conditions for ultrasonication and electrochemical pretreatments, respectively. The optimum buffer concentration was selected as 300 mg per g VS (volatile solids). The thermal pretreatment had the highest cumulative methane yield of 113.19 mL per g VS, which was an 11% increase compared to the control. This study shows the potential use of pretreatments on food waste to increase the solubilization and enhance methane production.

食物垃圾在城市固体垃圾中占最大比例，而产生的食物中有三分之一用于浪费。根据专家的预测，到2025年，食物垃圾的总产生量将增加44％。在这项研究中，热，超声和电化学预处理被用来增强以食物垃圾为底物的增溶作用和甲烷的产生。检查了不同的预处理条件，以确定每种预处理的最佳条件。用电化学预处理在20 V下40分钟观察到最高的溶解度。与对照组相比，增加了40％至47％。对于热预处理，选择80°C持续90分钟作为最佳条件。分别选择2 W / mL的30分钟和20 V的40分钟预处理作为超声处理和电化学预处理的最佳条件。最佳缓冲液浓度选择为300 mg / g VS（挥发性固体）。热预处理的最高累积甲烷产量为113.19 mL / g VS，与对照相比增加了11％。这项研究表明，对食物残渣进行预处理可以增加溶解度并提高甲烷产量。