SOLID WASTE GENERATION AND MANAGEMENT TOWARD CIRCULAR ECONOMY IN VIET YEN DISTRICT, BAC GIANG PROVINCE

Abstract

This study aims to propose the circular economy approach through waste management of pig husbandry farms. The waste audit technique was applied in the whole pig-raising process. Through a life cycle for sow (200 days), each consumed 0.88 tons of feed; 1.45 m³ of drinking water; 5 ml of vaccine and generated 0.71 tons of feces; 15.34 m³ of wastewater. Through a life cycle for swine (200 days), each consumed 0.64 tons of feed; 1.10 m³ of drinking water; 5.0 ml of vaccine and 0.55 tons of feces; 7.08 m³ of wastewater. Wastewater after biogas treatment contained TSS, total nitrogen and BOD₅ exceeded the standard about 1.18 - 1.21 times, 1.12 times and 1.55 - 1.65 times, respectively. Waste management is applied mainly through the VACB (36.6%); 36.7% of farms collected and re-used solid waste. The study showed a preliminary result on waste characteristics, a further study is recommended to focus on waste utilization and added value from waste flow.