음식물쓰레기 단독 퇴비화 및 음식물쓰레기와 하수 슬러지의 혼합 퇴비화에 따른 퇴비화시설의 운전특성

Operating Characteristics of Composting Facility during Composting of Food Waste and Co-composting of Food Waste and Sewage Sludge

This study was performed to assess the operating characteristics of food waste composting and co-composting (food waste + sewage sludge) at a composting facility. The facility was being operated successfully without being affected by kind of composting feed materials. Partial anaerobic condition was detected during food waste composting and co-composting, but these two composting systems were proven to be operated successfully under aerobic condition from the monitoring results of Oz, volatile solids reduction rate, temperature, and other parameters. The conductivity and chloride concentrations of compost were gradually increased during two composting periods, but the conductivity and chloride concentrations of co-composting indicated lower values than those of food waste composting at final point(40 m). As a result, co-composting was turned out to be more desirable than food waste composting. considering salt problem. High correlations (R²= 0.9265 for food waste composting and R² = 0.9685 for co-composting) between CEC and volatile organic matter were found. Quality of composts produced from two composting process satisfied Korean heavy metal standard.