Characteristics and Optimization of Anaerobic Digestion of Tea Waste for Biogas Production

[摘要] The tea residue from the production of beverage tea is used as anaerobic fermentation biogas production material. The anaerobic fermentation biogas-production experiment is conducted at an intermediate temperature of 35°C, and the biogas potential of the tea residue is reviewed. Using orthogonal experiment method, the effects of temperature, moisture and inoculation rate on the degradation property of tea residue are studied by designing L9 (3 3 ) experiment with 3 factors and 3 levels. The primary and secondary review factors and the optimum process conditions are determined. The experimental results show that: the cumulative biogas production after tea residue's anaerobic fermentation for 40 days is 5270 ml, and the biogas production rate is 658 ml.g-1TS; methane production rate is 227.7 CH4-ml/g-ts. Orthogonal experimental results show that the optimum process conditions are 85% moisture content, 55°C for temperature, and inoculation rate is 20%. The highest TS degradation rate is 45.3%, the VS degradation rate is 61.52%.

[学科分类] 材料科学（综合）