Anaerobic digestion of solid fruit waste supplemented with poultry manure in a horizontal plug#x2010;flow reactor

摘要

Anaerobic digestion of apple press cake in a horizontal plug#x2010;flow reactor (hydraulic residence time 40 d: 2.20 kg organic solids/m3.d) resulted in 78.1 conversion of organic solids and a gas yield of 0.510 m3/kg organic matter digested. Poultry manure fed weekly (4 kg total solids/m3) as the sole source of supplementation maintained levels of 400 mg ammonia nitrogen/1 and 13 mg phosphorus/1, and also maintained satisfactory levels of alkalinity and pH.