Winter management of rural digesters

In winter, the temperature is low. Due to the diversity of raw materials for fermentation in rural biogas digesters, the management of rural biogas digesters that are fermented at natural temperatures in the winter is particularly important.

Temperature is a key factor affecting the fermentation rate of biogas, and the essence of the impact is the activity of enzymes. Within a certain range, the higher the temperature, the better the flow activity of the enzyme and the faster the gas production rate. For underground biogas digesters, the biogas fermentation temperature is affected by the ground temperature, and the ground temperature is also affected by the temperature. Therefore, we should improve the ground temperature through artificial measures and keep the ground temperature as constant as possible. To increase the gas production capacity of biogas digesters in winter, simply put, it is necessary to “eat the stomach and cover the quilt”. Before entering the winter, you must do the following work:

(1) Increase the concentration of fermentation liquor and increase the pool temperature. Before the winter, increase the concentration of 6% solution to about 10%.

(2) At the beginning of winter, there is a large temperature difference between day and night, and special attention should be paid to the insulation of the biogas digester at night. Covering the sheds as early as possible, as the temperature decreases, cover them with straws and other insulation materials before the sun goes down.

(3) Keep ground feeding and ground discharge. To supplement fresh raw materials, extract and put forward fermentation and fermentation materials, give microorganisms sufficient nutrients, and increase gas production.

(4) Ground mixing, every 3 - 4 days, can be extracted with a slag cooler about 20 or so from the water pressure put more than a dozen barrels poured into the feed port, so that the fermentation of the material liquid stirred.

Through the above simple measures, it can be achieved that in the winter season, abnormality in the fermentation of the digester will not occur due to temperature changes, and the gas production time can be prolonged.

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