Biogas Digester, energy save and environmental protection, easy to use Biogas Digester P55the soft PVC biogas digester, blue second-generation product that uses a double-membrane composites. Digesters working pressure 4000kpa-6000kpa, Biogas digesters can withstand external pressures 2000kpa able to withstand the pressure of gravity. The product is used in material has anti-aging, acid and alkali ...