Biogas is a kind of renewable clean energy, and pig farm biogas digester has been widely used in China as an important way of organic waste treatment. However, in winter, due to the drop in temperature, the efficiency of the biogas digester on the farm is often affected, resulting in a reduction in biogas production or even a shutdown. In order to solve this problem, this paper will explain the reasons for the decline of gas production efficiency of biogas digesters in pig farms in winter, and propose corresponding solutions.
First of all, we need to understand the main reasons for the decrease in gas production efficiency of pig farms in winter. Temperature is one of the main factors affecting biogas fermentation, and low temperatures can inhibit the activity of microorganisms, thereby reducing biogas production. In addition, factors such as the proportion of carbon and nitrogen in the feedstock, pH, and oxygen content will also affect the biogas fermentation process. In winter, due to the drop in temperature, the microbial activity in the biogas digester of the farm decreases, resulting in a slowdown in the fermentation process and a decrease in gas production.
To solve this problem, we can do the following:
1.Insulation measures: Build an insulation wall or cover insulation material around the biogas digester in the pig farm to reduce heat loss and increase the temperature in the tank. At the same time, the surface of the digester can be covered with a layer of straw or film to achieve better thermal insulation.
2.Increase the amount of feeding: In winter, the feeding amount of the biogas digester in the pig farm can be appropriately increased to increase the concentration of fermentation substances, thereby increasing the biogas production. It should be noted that the feeding amount should be adjusted according to the actual situation to avoid excessive feeding and abnormal fermentation.
3.Adjust the carbon and nitrogen ratio: Appropriately adjust the carbon and nitrogen ratio of the fermentation raw materials of the pig farm biogas digester, which can increase the biogas production. In winter, the proportion of carbon-containing organic matter can be appropriately increased, such as increasing the amount of carbon-containing substances such as straw and straw.
4.Oxygenation measures: Adding an aeration device or other aeration measures in the biogas digester of the pig farm can increase the oxygen content in the tank and promote the fermentation of biogas. At the same time, attention needs to be paid to controlling the concentration and flow of oxygen to avoid the negative impact of over-aeration on biogas fermentation.
5.Strain selection and addition: Selecting strains suitable for winter fermentation or adding an appropriate amount of microbial preparations can promote the biogas fermentation process and improve the biogas yield. It should be noted that the selection and addition of strains should be adjusted according to the actual situation to avoid excessive addition and abnormal fermentation.
Through the implementation of the above measures, the gas production efficiency of the biogas digester in the pig farm in winter can be effectively improved. In practice, the following points need to be noted:
1.Regular inspection: Regularly inspect the biogas digester in the pig farm, including the temperature, pressure, pH, oxygen content and other indicators in the tank, as well as the feeding amount and quality of fermentation raw materials. If the problem is found, it will be dealt with in time to ensure the normal progress of biogas fermentation.
2.Safety management: The pig farm biogas digester involves certain safety hazards, and safety management measures should be strengthened. Conduct regular inspection and maintenance of biogas pipelines, valves and other facilities to eliminate potential safety hazards in a timely manner. At the same time, safety publicity and education should be strengthened to improve employees' safety awareness and ability to respond to emergencies.
3.Rational use of resources: The biogas digester of the pig farm should make full use of waste resources for fermentation treatment to reduce environmental pollution and waste of resources. At the same time, the rational use of biogas can also bring certain economic and environmental benefits to enterprises.
4.Technology update and improvement: With the continuous development of science and technology, the biogas digester technology of the pig farm is also constantly updated and improved. Enterprises should pay attention to industry trends and new technological achievements, and actively introduce and apply advanced biogas technology and management models to improve gas production efficiency and management level.
In short, the reduction of gas production efficiency of biogas digesters in pig farms in winter is a common problem, but by taking effective solutions and strengthening management measures, the normal progress of biogas fermentation and the improvement of gas production efficiency can be guaranteed. This can not only reduce environmental pollution and waste of resources, but also bring certain economic and environmental benefits to enterprises. Therefore, we should actively promote and apply biogas technology in pig farms to promote sustainable development and the construction of circular economy.