Analysis of Greenhouse Gas Emission Characteristics Based on the Operating Status of Food Waste and Wastewater Biogasification Facilities

Recently, the conversion and integrated bio gasification of food waste have been aggressively explored in the waste management sector to reduce greenhouse gas emissions and promote the production of renewable energy. However, diverse constraints limit the transfer of all facilities to integrated bio gasification, resulting occasional use of stand-alone bio gasification. Methods of bio gasification of food waste include utilizing the raw material itself as a raw material or using discharged food wastewater from various resource facilities as a substrate. This study employs operating data from two types of food waste bio gasification facilities to calculate parameters such as sludge reduction, energy consumption, wastewater treatment, and biogas emission and reduction effects, culminating in the computation of net greenhouse gas emissions. The study shows that while the Food waste-Based Biogasification Process (FBP) excellent in biogas production, it generates more greenhouse gases in terms of energy usage and wastewater treatment than the Food Wastewater-Based Biogasification Process (FWBP). Notably, this study's results differ from previous research by considering wastewater treatment, thereby providing data that is crucial for technology developers and policymakers.