Before the winter, the simplest way to manage the biogas digesters is to cover them. The surface of the digester is covered with straw, straw, straw, compost or thickened soil and other insulation materials. The coverage area is greater than the surface of the pool to prevent cold air from entering and lowering the temperature in the pool. A further method can also be used to dig an annular ditch around the digester. On the one hand, it can play a role in draining water to prevent the inflow of cold water from the outside and reduce the pool temperature or the pool of manure water overflowing the frostbite; on the other hand, the dung can be piled in the ditch. , using the heat produced by its fermentation. There are conditions that can also be specifically designed to build plastic shed insulation. First, do a good job of management Operators should stick to their responsibilities and earnestly conduct inspections and maintenance of winter facilities and equipment to ensure the normal operation of facilities and equipment. For a longer period of time, a centralized biogas digester should be used for slagging and tapping, adding new materials so that the newly added fermentation materials account for more than 60% of the total pool capacity, and increase the fermentation concentration to ensure the supply of winter fermentation raw materials. Second, do not start a new pool It is generally not advisable to start a new pool in the winter. If it is difficult to ferment in winter, if it is forced to start a new pond in the winter, the effect of gas production is not good, which will have an adverse effect on the long-term use of the digester. Similarly, it is not appropriate to make large refueling in the winter. However, it must be noted that the biogas digester must not be used for fasting winters. The old pool can generally take out 2/3 of the feed solution for winter fertilization before adding it to the winter, and then add 1/3 of the fresh raw materials to play a role in the fermentation and warming of the pond; Straw and weeds should be stuffed and fermented to prevent freezing and cracking of the pool. The stacking material will be removed at the start of next year. Although there is no obvious gas production in the unactivated new pool, the underground methane tank is actually in semi-production, and the air pipe should be dialed down to prevent the slow production of gas in the winter to swell the pool body, or the leakage of biogas causes serious safety hazards. Third, fire prevention In winter, the climate is generally dry and rainy, and fire protection should be strictly prevented. Special attention should be paid to the fire protection of the biogas tanks and illegal operation is strictly prohibited. Fourth, pipeline maintenance Condensation water is easily formed in winter under low temperature conditions. Check the water bottle frequently to remove the condensate in time to avoid blocking the pipe. It is also necessary to bury the pipeline underground or to prevent it from freezing. Air leaks, aged pipes, fittings, etc. must be promptly replaced. Fifth, prevent air leakage If the winter temperature suddenly drops, it will easily cause cracking of the pool wall, which will greatly damage the life of the winter gas and the life of the digester. If cracks in the pool walls are found, they must be repaired. When repairs must be strictly in accordance with "Rural household methane tank management operating procedures" to empty the pool, the various safety measures in place after entering the pool and re-apply mortar. After entering the pool, wash the residues in the pool with clean water first, and then apply “one ash two pulps†or “two ash three pulps†to greatly increase the gas production and enhance the service life of the digesters.
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