Digester with floating cover

The floating cover of digester is made of reinforced PVC membrane or coated fabric. The edges are double-sided welded, crossed by iron wire or plastic tube to be fixed at bottom of digester. Household type digester is always in the dimensions of diameter 1~3 m with height 1~1.5 m, cylinder or rectangular shaped; Industrial type is 3~4m width, arch height at 1~1.6m and length at 4~15m, single or multiple numbers in parallel. Characteristics of floating soft digester: 1.Excellent heat absorption Fermentation temperature is the key factor, at least 15 degree.C required by this technology. This modified membrane could absorb heat from sunshine for improvement of biogas production. 2.Strong pressure resistance For digester of reinforced PVC membrane, operation pressure could be up to 3 kPa; For PVC coated fabric, it can reach 8 kPa; What’s more that the digester is equipped with pressure protecting mechanism. 3.Good air tightness The floating cover is hot-welded by multi-functional high frequency welding machine, with perfect performance of air tightness, in line with the requirements of anaerobic fermentation.