(I) Timely reloading
Biogas farmers need to conduct a general refueling of the biogas before entering the winter to ensure sufficient raw materials for winter fermentation. The refueling is preferably one-third of the pool capacity. In the northern part of Shijiazhuang, according to climate change, biogas users are required to organize refueling around mid-September, and central and southern regions are to be refueled at the end of September and early October respectively. For non-cultivated farmers, reserve the number of fermentation raw materials in advance. When feeding, fresh, high-concentration (about 11%) of fresh feces such as cows, horses, pigs, sheep, etc. should be used. Generally, dry wheat straw, corn stalk, and Other fiber-based fermentation raw materials are not added. Pay attention to the control of water temperature and avoid cold water directly into the pool. To intensify the stirring, it is often used artificial or biogas liquid reflux to stir.
(b) Adopt insulation measures
The biogas tank farmer who has built a solar energy heating ring on the ground shall timely cover the insulation of plastic sheeting, and repair the warm ring with damage. Farmers who do not have an integrated solar thermal ring should, according to climate change, cover the surface of the digester early with straw, firewood, straw, and other insulation materials. The coverage should be greater than the surface of the pool, and the surrounding edges should extend outward by 1 meter and the thickness should be 1.5 meters. It is advisable to seal well and prevent cold air from entering and lower the temperature inside the tank. It is also possible to build a plastic shed insulation above the biogas digesters.
(three) pay attention to the maintenance of the pipeline
Condensate water is easily formed in the winter pipeline, and even ice blocks the pipeline. Therefore, to check the water collector or automatic exhaust valve, pay attention to the timely discharge of condensate, and take thermal insulation and antifreeze measures. At the same time, we must also do a good job of antifreeze pipeline, the pipeline buried in the ground, you can use straw rope, rags, plastic film, etc., dressing pipe, to prevent cracking. It is necessary to conduct a safety inspection on the biogas cookers, pipelines and fittings. The leaks, aged pipelines and accessories must be replaced in time.
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