... of an anaerobic fermentation tank, a gas storage bag, a gas pump, a solar charger, as well as gas ... and consists of mainly an upper tank and a lower tank. The product has the following ... production rate can reach 0.8m3/m3; Portable solar biogas digester is composed of the following products: ... 3. gas storage bag 4. biogas pump with solar charger 5. biogas appliances (stove double/single burner ...