The biogas produced by anaerobic digestion of organic waste can be used as an environmental gas conditioner in addition to its energy use. It can be used for disinfestation and storage of foodstuffs, seeds, and preservation of fresh fruits and vegetables. It is also simple and easy to implement. Less investment, significant economic benefits. First, the plastic account sealed biogas MAP storage technology 1. Equipment and installed in the original granary covered with 0.1 ~ 0.2 mm polyethylene plastic account, the top of a small tube set for the exhaust channel, and with the oxygen meter or carbon dioxide The analyzer is connected so that the oxygen content or carbon dioxide content of the ambient gas in the grain heap can be measured at any time. A “ray-shaped†inlet diffuser is placed at the bottom of the grain pile and is connected with the biogas flow meter. The flow meter and the biogas gas pipeline and the switch connection. 2. After the installation of the operation and control equipment and pipelines is completed and no air leakage or obstruction has been checked, the biogas transmission switch can be opened to allow the biogas to enter the grain pile. The gas in the grain heap is discharged from the exhaust pipe at the top of the granary through measuring Instruments after being driven by the pressure of the biogas. When the amount of biogas that is charged reaches 1.5 times the volume of the grain pile, the oxygen content drops to 1% to 5%, and the carbon dioxide content rises to 20% to 30%, the exhaust pipe and the biogas switch before the oxygen analyzer are closed, and the seal 3 Within 5 days, you can kill the main grain pests in the grain piles, such as the corn lineage, the Miotuga Pirates, and the mung bean line. Shelf life is more than one year. 3. Precautions 1 Before the gas transmission, carefully check the degree of sealing of the plastic bag and pipe system. 2 Fireworks are strictly prohibited in the warehouse to prevent fires. 3 The amount of biogas used as a gas conditioning agent must be sufficient to avoid killing pests because the concentration (ie, carbon dioxide content) is too low. 4 High grain moisture, long-term oxygen deficient breathing, will produce more alcohol, affect the quality of food, should pay attention to frequent ventilation. Second, the container sealed biogas MAP storage technology This technology is suitable for the family and the use of small quantities of food, commonly used containers are tile tanks, jars, barrels and cement pools. The method is: using a suitable material as the lid of the container, drill two small holes on the lid hand, and the size of the hole diameter is suitable to insert into the exhaust pipe. One hole is inserted into the inlet pipe, the other is inserted into the exhaust pipe, and then the inlet pipe is connected to a self-made bamboo inlet diffuser placed at the bottom of the container (the bamboo in the middle opens, the bottom section does not open, and the circumference is drilled On a bamboo pipe with dozens of small holes, the container is filled with food, covered with a lid, and sealed with paraffin or other sealing material. A three-way pipe is connected to one end of the exhaust pipe, and the other two ends of the tee pipe are respectively connected with a pressure gauge, a biogas switch, a lamp, and a stove. When the biogas is charged for the first time, the switch on the exhaust pipe should be opened so that the air in the container can be discharged as far as possible until the biogas lamp can be ignited. Then, the switch is turned off, so that the container is filled with biogas and sealed for 3 to 5 days. All pests die. Third, fruit anoxic preservation of biogas gas storage technology 1. Select a suitable storage location should be selected to avoid wind, clean, relatively stable temperature, little change in day and night humidity difference. 2. To determine the appropriate storage format usually container-style, film cover, crypt type, storage room four. The container type and film cover type have the advantages of low investment, simple equipment, convenient operation, and easy operation, but they have small storage capacity and are suitable for home and short-term storage. The crypt type and storage room have large investment in space construction and require high sealing technology and storage. With large capacity, long life cycle, and small environmental conditions, it is suitable for collective, professional households and long-term storage. 3. Technical Management 1 Loading Fruits Put the selected fruit in plastic baskets. Carton or polyethylene bag is stored in the room, mercury thermometer and relative humidity meter are set outside the window so as to check the change of temperature and humidity in the room at any time. After the fruit box is piled up, the door is closed and the door joint is closed with adhesive tape or other sealing material. 2 The amount of biogas aeration is 0.06 cubic meters per cubic meter of storage room, and 0.14 cubic meters after 10 days, so that the oxygen content of the environmental gas in the storage room is kept at 3% to 10%, and the carbon dioxide content is kept at 2%. 10% is appropriate. 3 temperature and humidity control General storage temperature is maintained at 3 ~ 10 °C, the humidity is stable at 94%, the daily temperature change is less than 1 °C. 4 Daily management Within 2 months after fruit storage, turn over the boxes every 10 days. When turning, check the storage status in time. If rotten and damaged fruits should be picked out immediately. After every two months turn once. Keep an eye on the season when changing the air, at noon during the cold season, and during the night in the hot season. At the same time pay attention to the regular use of 2% lime water storage room floor, walls, fruit boxes to disinfect, keep the environment clean and sanitary. When the temperature is low 0°C, frost damage should be prevented.
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