After the completion of the gas pool, the daily management has a great impact on the production and application of biogas. The biogas digester is to be built in three parts and managed in seven parts. The construction of biogas digester is the foundation of gas production, but the application and management of biogas digester is the key to the efficient operation of biogas digester.
(1) timely supplement new raw materials to ensure continuous biogas production. After some biogas digesters are used for a period of time (2-3 months later), there will be no gas production or less gas production or gas production but no ignition, which may be due to the consumption of fermentation raw materials. At this time, it is necessary to consider adding new materials. The time of adding new materials shall be controlled to stop 1.5-2 months after the normal gas production of the new biogas digester, and the new materials shall be added gradually and continuously, without excessive input at one time.
(2) it is the best supplement source of raw materials to maintain stable breeding quantity. If a 10 cubic meter biogas digester wants to achieve sustained and stable gas production, it is the best to maintain the breeding capacity of 3-5 pigs (or 1-3 adult cows), which can ensure adequate supply of manure sources, continue to use biogas, and increase family income by breeding.
(3) frequent in, out and agitation can greatly improve gas production. In order to ensure the normal and stable production of a large amount of biogas in the biogas digester, it is necessary to feed and discharge materials frequently. This not only ensures that there are sufficient fermentation materials, but also has the following benefits: first, compared with regular large refueling, it will not form a large number of loss of biogas bacteria. Second, it has little effect on the temperature of the feed liquid in the biogas digester. Third, it has little effect on the change of biogas pressure in the tank and will not show the phenomenon of gas cut-off after large refueling. Fourth, it has little effect on the pH value of feed liquid in the tank, which is conducive to the stable stop of biogas fermentation. Frequent agitation can make the concentration, temperature and pH value of the feed liquid in the biogas digester stick to differences; it can make the fermentation raw materials and biogas bacteria fully mix and contact, improve the conversion rate; it can speed up the outward diffusion of biogas, and improve the gas production. It can break through the floating shell of raw materials and facilitate the release of biogas. More than 50% of the average gas production can be improved by frequent input, frequent output and frequent agitation.
(4) keeping warm in winter is the key to the annual operation of biogas digesters. In winter, the temperature and ground temperature are relatively low, especially the ground temperature has an obvious impact on the gas production of biogas digesters. According to the investigation for many years, the gas production is the least from March to April, even the gas production is not. Therefore, the key to the annual operation of Biogas digesters is to stop the heat preservation of biogas digesters in winter and early spring.
① the biogas digester should be built in the center of leeward, sunny and high ground temperature. If possible, it can be built in a greenhouse. It should also be built under the permafrost. In winter, straw, weeds and sawdust are piled on the pond as heat preservation materials.
② the biogas digester is best built under the livestock and poultry enclosure, which ensures the insulation of the biogas digester at the same time.
③ it is better to add hot water when replenishing raw materials in winter and early spring to improve the temperature of fermentation raw materials and pool.
④ the raw materials for fermentation should be supplemented in time to improve the concentration of feed solution. However, it is not recommended to add raw materials with high carbon content such as sticky and weeds as supplements.
⑤ frequent agitation is required. At low temperature, the biogas digester is easy to form and stratified, and the demand is increased. Generally, it is better to agitate once every 3-4 days. The self-made agitator can be extended into the tank from the feed port for agitation, or the biogas slurry can be used for backflow agitation (that is, take a certain amount of biogas slurry out of the water pressure room with a bucket and then pour it into the tank from the feed port).
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