中文摘要：

考察不同镁粉加入量对剩余污泥在20℃,pH=10条件下发酵的影响。研究结果表明：镁粉的投加对剩余污泥的溶解无太大影响,但可以提高污泥的产酸量,且干污泥中最佳的镁粉投加量为0.01 g/g。各种镁粉投加量条件下,产酸组成由大到小顺序均为乙酸,丁酸,异戊酸,丙酸,异丁酸,戊酸。污泥发酵产生的发酵液中氨氮的浓度在镁粉投加量为0.01 g/g时最高,不投加镁粉时最低;而发酵液中正磷酸盐的浓度随着镁粉投加量的增多而减少。

英文摘要：

The effect of magnesium powder addition on waste activated sludge （WAS） fermentation under the condition of 20℃ and pH=10 was investigated. The results show that adding magnesium powder does not affect WAS solubilisation, but can enhance volatile fatty acid （VFA） production, and the optimal addition is 0.01 g per gram TSS. The compositions of VFA are in following order （from big to small）： acetic acid, n-butyric acid, iso-valeric acid, propionic acid, iso-butyric acid, n-valeric acid for any conditions investigated. The most and least concentrations of ammonia in the fermentation liquid are achieved when adding amounts are 0.01 and 0 g/g, respectively. The concentrations of phosphorus in the fermentation liquid decreases with the increase of the adding amounts