Progression and Prospects on the Research of Two-Phase
   Anaerobic Digestion (TPAD)
   

　　Wang
   Kehao¹  Li Dongwei^1,2  Li Dou¹  Yuan Xue¹  Xu
   Zhonghui¹ 
   

　　(1. College of Resource
   and Environmental Science，Chongqing University，  Chongqing  400030； 2. The Key Laboratory of the Exploitataion of