The leachate of alkaline is reciculatcd, which will shorten the acid fermented stage of the rubbish, suppressed the generation of leachate of high density, maken the COD reduce with a large range.

• 弱碱性的渗滤液回灌到垃圾层中缩短了垃圾酸性发酵阶段,抑制了高浓度的渗滤液产生,使COD有较大幅度的降低。