In this study, biogas yields and methane contents of vegetable wastes from Thailand’s largest agricultural market were investigated. Granular sludge from an up-flow anaerobic sludge blanket (UASB) reactor was used as inoculum. To determine the influences of the feedstock to inoculum (F/I) ratio and alkalinity, batch experiments were conducted at three different F/I ratios (i.e., 0.5, 1.0, and 2.0 g VS_feedstock/g VS_inoculum), and five NaHCO₃ concentrations (i.e., 0, 300, 500, 600, and 900 mg/g VS_added). The reuse of digestate from previous anaerobic reactors, as sources of alkalinity and inoculum, was also investigated. After 53 days of the experiment, without adding NaHCO₃, an F/I of 0.5 gave the highest biogas yield of 851 mL/g VS and a CH₄ content of 52.3%. Adding external alkalinity significantly helped to improve the biogas production and methane contents at F/I ratios of 1.0 and 2.0. The results from using the recycled digestate as inoculum were comparable with reactors using UASB sludge and helped to decrease the amount of NaHCO₃ to 150 mg/g VS. The high anaerobic digestion performance in the study demonstrated the potential of utilizing the organic waste from a vegetable market as a renewable energy source.

在这项研究中，对来自泰国最大的农业市场的蔬菜废弃物的沼气产量和甲烷含量进行了调查。来自上流式厌氧污泥床反应器的颗粒污泥被用作接种物。为了确定原料对接种物（F / I）的比例和碱度的影响，以三种不同的F / I比例（即0.5、1.0和2.0 g VS_原料/ g VS_接种物）和五种NaHCO进行分批实验_3个浓度（即_添加的0、300、500、600和900 mg / g VS ）。还研究了将以前厌氧反应器中消化物的再利用作为碱度和接种物的来源。实验53天后，不添加NaHCO ₃F / I为0.5时，最高沼气产量为851 mL / g VS，CH ₄含量为52.3％。在F / I比为1.0和2.0时，添加外部碱度显着帮助改善了沼气产量和甲烷含量。使用回收的消化物作为接种物的结果与使用UASB污泥的反应器相当，并有助于将NaHCO ₃的量减少至150 mg / gVS。该研究中的高厌氧消化性能证明了利用蔬菜市场的有机废物作为可再生能源的潜力。