The performance characteristics of biogas bag are: economy, durability, low price, low investment and quick effect; the equipment is frost-proof (-25℃), sun-proof (50℃), lightning-proof, earthquake-proof, anti-aging, corrosion-resistant and non-leakage. Installed in a fully enclosed environment, without any man-made or external damage, it can be used continuously for 8- 12 years. The price is only one-third of that of cement pouring biogas digesters and FRP biogas digesters, and it has developed very rapidly in rural areas. Except for one-time purchase of equipment, the later investment is almost zero. After preliminary accounting, a set of 8 cubic meters of technical equipment can be used for more than 8 years, and the maximum installation cost is not more than 1.200 yuan (acceptable to residents in economically backward areas in the west). Users can use gas 24 hours in summer and 96 hours in spring and autumn after installing this equipment and putting fermented materials into fermentation bags. The biogas produced in that year can be compared with the purchased gas, and the full cost of the equipment can be recovered through discount calculation.
Light weight, folding, small size, convenient transportation and carrying, and can be moved and installed at will. The weight of the whole set of equipment is only about 10-20kg, which is easy to carry. And the equipment can be installed at will. If the user moves to a new house, the equipment can be disassembled and installed separately. The installation is simple and quick, and the pit depth can be arbitrarily selected according to the user's conditions. The main body of the equipment (soft folding biogas fermentation bag) is made of high-strength plastic material, which has high mechanical strength and elongation. The installation is not limited by any geographical conditions, and can be placed on a general foundation (such as the existing septic tanks for people and animals in rural areas, the stairwells of township buildings, or even a soft soil pit). Even if the fermentation tank foundation is shaken or deformed by external force, the equipment can work as usual without any influence.
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