鸡粪、猪粪与秸秆混合厌氧发酵配比参数优化

以鸡粪、猪粪、麦秆和玉米秆为发酵原料，采用混料设计和中心组合试验设计对鸡粪、猪粪、麦秆和鸡粪、猪粪、玉米秆原料混合厌氧发酵进行了优化。混料设计以3种原料为自变量，中心组合设计以鸡粪与猪粪的比例和碳氮比为自变量，均以甲烷产量为响应变量。结果表明，3种原料混合厌氧发酵的甲烷产量显著高于单一原料及两种原料混合发酵；多原料间在发酵过程中的协同作用提高了甲烷产量，在优化配比下，各试验组实际甲烷产量分别是其期望值的1.62、1.70、1.66和1.73倍。混料设计和中心组合设计均可优化混合原料发酵的原料配比，但中心组合设计具有更广泛的适用性。

Optimization of Ration of Feeding Substrates in Anaerobic Co-digestion of Chicken Manure, Swine Manure and Straw

Chicken manure, swine manure, wheat straw and corn straw were selected as raw materials for optimization of anaerobic co-digestion based on mixture design and central composite design. Three raw materials in mixture design were independent variables. The ratio of chicken manure and swine manure and the ratio of carbon and hydrogen in central composite design were independent variables. The methane potential was the response variable. The results indicated that the methane potential under co-digestion of three materials performed better than single and two components. The synergy effect of several materials improved the methane potential. Under optimized proportions, the actual methane potential was 1.62, 1.70, 1.66 and 1.73 higher than the expected value. Both mixture and central composite design were suitable for optimization the proportions of raw materials, but central composite design was more appropriate.