Soft biogas digester
Performance characteristics:
1、 It is economical and durable, low in price, low in investment, and quick in effect: the equipment is frost resistant (-25 ℃), sun resistant (50 ℃), lightning proof, earthquake resistant, aging resistant, corrosion resistant, and free of leakage. It can be installed in the fully enclosed condition without any human or external damage, and can be used for 8-12 years continuously. The price is only one-third of that of cement casting and fiberglass biogas digesters, and it has developed rapidly in rural areas around the world. Except for a one-time purchase of equipment, the later investment is almost zero. According to preliminary calculations, a set of 8 cubic meters of this technology equipment that can be used for more than 8 years has a maximum installation cost of no more than 1200 yuan (which is acceptable to residents in economically underdeveloped areas in western China). When the user installs the device, after adding the fermentation material into the fermentation bag, gas can be used 24 hours in summer and 96 hours in spring and autumn. By comparing the biogas produced in the past with the purchased gas and calculating the discount, the full cost of investing in the equipment can be recovered.
2、 Lightweight, foldable, small in size, easy to transport and carry, and can be moved and installed freely. The entire equipment weighs only about 10-20 kilograms and is easy to transport. And the device can be moved and installed freely. If the user moves to a new home, the device can be removed and installed separately.
3、 Installation is simple and fast, and the depth of the pit can be freely selected according to user conditions. The main body of the equipment (soft foldable biogas fermentation bag) is made of high-strength plastic material, with high mechanical strength and elongation. It is not limited by any geographical conditions during installation and can be placed on general foundations (such as existing human and animal manure tanks in rural areas, stairwells in rural buildings, or even a soft soil pit). Even if the foundation of the fermentation tank is shaken or deformed by external forces, the equipment can work as usual without any impact.
4、 No need to stir, high gas production. The body of the fermentation tank is dark colored and can be exposed to the open air, making it easy to absorb solar energy. The temperature inside the tank is high, and the gas production rate is also high. A plastic biogas digester with a capacity of about 6 cubic meters is equivalent to the gas production of a 10 cubic meter water pressure biogas digester. This type of biogas digester has great advantages in areas with high temperatures and can be used in solar greenhouses during winter in northern regions. In addition, due to the high-strength soft material manufacturing of the tank body, it has very strong tear resistance and can be pressed and vibrated downwards from the top of the tank body at any time without stirring, allowing the floating objects (i.e. the crust part) on the liquid level inside the fermentation tank to immerse below the liquid level, thus solving the problem of gas production caused by the crust formation of the fermentation material in the fermentation tank. Furthermore, the fermentation material that is constantly added is fermented under completely sealed conditions, so the same amount of fermentation material in this equipment can increase gas production by more than 20-30% compared to traditional biogas equipment with the same tank capacity.
5、 The fermentation raw materials used come from a wide range of sources: the raw materials are usually people's household waste, agricultural waste, etc., such as abandoned crop straw and human and animal manure in rural areas; City residents' fruit peels, vegetable peels, feces, dishwashing water, and bath water; Waste from food processing plants, residues from the catering industry, etc; Generally, farmers can meet their daily gas needs by raising three or more pigs.
6、 The use of this device is very safe: because the fermentation room of the device is made of plastic materials, it can withstand gas pressures of more than 10KPa. In fact, when the device is working normally, the pressure inside the fermentation room gas box is within 4KPa to 5KPa (if it exceeds 5KPa, it will be discharged from the discharge port). Therefore, users do not need to worry about the high pressure and explosive hazards of natural gas, coal gas, and liquefied gas when using it. On the other hand, because the fermentation tank of this equipment is a soft body with arbitrary depth (generally controlled between 0.6 and 1.2 meters), personnel do not need to enter the tank for cleaning, discharging, and repairing the fermentation tank body, so it will not cause methane poisoning incidents.
7、 Hygiene and environmental protection: Because the product itself is a purification device for processing household waste, and its entire fermentation process is carried out in a completely sealed state, without any pollution to the surrounding environment; When the equipment is working normally, the biogas slurry flowing out from the automatic discharge port at any time fully meets the national emission standards. The purified biogas slurry can be used for planting vegetables, irrigating various crops and other plants, and can also be used for pig farming.
8、 Easy to use and maintain, easily mastered by the general public, and easy to popularize: no high level of professional knowledge is required, it can be learned at a glance, and can generally be learned with a primary school education level. In case the equipment is damaged by sharp objects or artificially destroyed, users do not need to find distributors or manufacturers, and can carry out repairs and troubleshooting themselves. Clean the damaged area with a cleaning cloth, and use a piece of material similar to the pool body to stick the damaged area for repair (using PVC adhesive).
9、 Easy for industrial production and commercial operation: Due to the fact that the main components (biogas fermentation bags, biogas storage bags) are made of plastic materials, it is easy to carry out industrial prefabrication production and folding packaging for commercial operation (a set of equipment with a capacity of 6 to 8 cubic meters, suitable for 4 to 6 people, with a volume of no more than 0.2 cubic meters and a gross weight of no more than 20-30 kilograms after packaging).
10、 The entire set of equipment for this technology is systematized and can also be customized: it can be selected according to the amount of household waste or fermentation materials for different users, and can also provide customized sizes. It can produce biogas digesters ranging from 2m3, 3m3, 4m3, 5m3, 6m3, 8m3, 10m3 to 1000m3.