·Easy designed, sturdy, less failure rate, low operating costs     

·Several vertical augers mixing, strong crushing capacity, fertilizer doesn′t rise, less bad smell 

·Fast fermentation speed, high fermentation pile in the groove,

      effectively keeping the heat produced by fermentation to promote the fermentation rate, even stably fermented in cold area  

·Single groove fermentation, less land use, low civil construction cost

·Fermentation groove width 5-18m, Fermentation pile height 1.5-3m, high treating capacity, large scale factory production is possible