Biogas storage is a low-temperature storage method that adjusts the proportion of fruit storage environment and gas components. The principle is to use the characteristics of high methane and carbon dioxide and low oxygen content in the biogas to minimize the respiration and evaporation of the stored fruit without causing physiological diseases due to asphyxia, thereby achieving the purpose of preservation. The effect of biogas storage on fruit quality depends on the three factors of biogas volume, temperature, and humidity in the storage environment. Each cubic meter of biogas in the reservoir should reach 0.4 cubic meters, oxygen content is within 17%, temperature is 5 °C-15 °C, temperature should be 80%-90%. Biogas storage construction volume is generally 80 cubic meters -100 cubic meters, about 40,000 yuan investment. Wind building storage room, air exchange room, inlet pipe, outlet pipe, air inlet, exhaust hole, equipped with equipment such as galaxy, oxygen meter, moisture meter, thermometer, etc. Each 100 cubic meter biogas digester can be kept fresh. Fruit 25,000 kilograms. The main advantages of biogas preservation: First, preservation time is long. Second, preservation costs are low. Third, preservation effect is good. Taking oranges as an example, only RMB 0.6 will be sold per kilogram before fresh-keeping, and the selling price will be 0.9 yuan per kg after preservation. According to the calculation of 80 cubic meters per store, the storage will be 40,000 yuan and the profit will reach RMB 36,000. Under normal circumstances, the entire cost can be recovered by storing the fruit once. China Agricultural Network Editor
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