有机酸对污泥发酵产氢的影响研究

he organic acids accumulated during the process of excess sludge anaerobic fermentation has critical effects on the production of hydrogen. The effects of added acetate acid, butyrate acid and lactic acid on fermentative hydrogen production by sludge were investigated. The results showed that acetate acid had little effect on the final hydrogen yield, while butyrate acid had a positive effect on hydrogen production, and lactic acid could inhibit hydrogen production obviously. According to the fitting results of modified Gompertz model, the lag time could be prolonged by all the organic acids and influence the maximum hydrogen production rate. The utilization of soluble protein and sugar were also influenced by the addition of organic acids.