餐厨垃圾与市政污泥共消化厌氧产氢研究

为探求高温(55℃)、高含固率(20％)条件下餐厨垃圾和市政污泥共消化厌氧产氢的性能, 将餐厨垃圾与市政污泥按挥发性固体(VS)质量比(1:1、2:1、3:1、4:1、5:1)混合进行共消化厌氧产氢实验, 观察不同比例混合物料厌氧产氢系统内的pH、挥发性脂肪酸(VFAs)和氨氮的变化, 以及单位VS产气量和氢气的体积分数. 结果表明, 餐厨垃圾与市政污泥混合共消化厌氧能取得较好的产氢效果. 当餐厨垃圾与市政污泥的物料比为3:1时, 厌氧系统单位VS产气量和氢气体积分数均达到最大值, 分别为118.2mL·g-1 VS和37.47％; 各比例混合物料在整个厌氧产氢过程中系统均运行良好, 未出现系统“酸中毒”或失败的现象.

Study on hydrogen production by anaerobic co-digestion of kitchen waste and sewage sludge

This study was aimed to investigate the anaerobic hydrogen production from kitchen waste and sewage sludge under high temperature (55℃) and high solid content (20％). Hydrogen production by anaerobic co-digestion was tested under different mixing ratios (kitchen waste : sewage sludge = 1:1, 2:1, 3:1, 4:1, 5:1 by VS). The variation of pH, ammonia nitrogen, volatile fatty acids (VFAs), gas production and the volume fraction of hydrogen were collected. The results showed that gas production and the volume fraction of hydrogen reached the highest values of 118.2 mg·L-1 VS and 37.47％ respectively at the mixing ratio of 3:1. The co-digestion system was effective to eliminate acidosis during the entire process of the experiment.