金属离子对剩余污泥和生活垃圾联合厌氧消化的影响

Effects of Metal Ions on Combined Anaerobic Digestion of Excess Sludge and Domestic Waste

以城市有机生活垃圾和污水处理厂剩余污泥作为发酵原料,在相同条件下,研究不同浓度的Fe2+,Co2+,Ni2+组合对厌氧消化过程和消化效率的影响。结果表明,添加金属离子能提高垃圾的消化效率,当Fe2+,Co2+,Ni2+的浓度分别为3 mg·L-1,1.5 mg·L-1,1.5 mg·L-1时厌氧消化效果最好,COD降解率为71.14%,TS去除率为48.83%,VS去除率为69.34%,与对照相比分别提高了13.79%,17.09%,15.54%。

The effect of different combination of Fe^2 ＋ , Co^2 ＋ , Ni^2 ＋ on the anaerobic digestion was experimented with com- bined raw material of excess sludge from wastewater treatment plant and domestic waste. The results showed that the digestion efficiency of domestic waste could be improved when metal ions were added in the anaerobic fermentation. The best digestion efficiency was obtained when the metal ion concentration of Fe^2＋ , Co^2＋ and Ni^2＋ were 3 mg ·L^-1 , 1.5 mg·L^-1 and 1.5 mg· L^-1, respectively, the COD degradation rate was 71.14%, TS degradation rate was 48.83%, and that of VS was 69.34%, which were increased by 13.79% ,17.09% and 15.54% respectively, comparing with the control.