1. Winter Insulation Each year before entering the winter (in early November), add dry (ie, high-concentration) materials to the pool, stack rice straw or raw cow (pig) manure or cover soil. In the winter, the biogas digester should be cast in full. During the feeding process, some hot materials such as pig manure, sheep manure, rice straw, and dry leaves should be paid attention. If possible, a portion of silkworm excrement, lees, or pigs can be thrown when conditions permit The waste water and the tofu of the feet are made of water, and then the grass is piled on top, and the wind walls can be built around the pool. The overhead gas pipelines should be wrapped in old cotton and then wrapped in plastic film. Underground gas pipelines should also be packed in such a way that they can be buried underground to prevent freezing. The entrance and exit openings need to be covered with double plastic film or straw curtains. The straw curtains should be removed on sunny days and the sun should be exposed to light to increase the temperature. When the temperature in the tank is below 8°C and the gas production is insufficient, it should be stopped.
2. Drainage ditch should be around the Xiayuyu methane tank. Summer rainy weather, some farmers built the biogas tank outside the pens, the rainwater can easily be poured into the biogas tank from the feed pipe or water pressure chamber, affecting the concentration of the pool material; or diffuse the biogas liquid to the vault to reduce the production gas box. Volume, which results in the biogas digester not producing gas normally. Therefore, it is necessary to cap the feed pipe and the water pressure to prevent rainwater from directly entering the biogas digester; it is necessary to increase the intake of the outdoor biogas digester and the pressure between the water tanks. Prevent rainwater from flowing into the digester.
3. With good ingredients used "summer light winter concentrated," the formula feed, dry matter concentration in summer is 8% to 10%, 12% to 14% in winter, twice a year large refueling. The reloading time is preferably from September to October of each year and March to April of the following year. Straw and other stalks should be first filled with pigs and bullpen, and then piled into the pool after being stepped on by the livestock. This will help to destroy the waxy surface of the straw, soften the fiber of the straw, make the stalks ferment quickly after entering the pool, and produce gas quickly.
4. Diligent feeding 30 to 50 days after major reloading to add new material. In the summer, weeds should be supplemented. In winter, cattle, pig manure or distiller's grains, and straw should be supplemented. Each cubic meter of digester feeds 1.5 to 2.5 kilograms each time. After the biogas digester is running, the fermentation raw materials of the digester are often mixed so that the raw materials can fully contact the biogas bacteria, promote the metabolism of the biogas bacteria, accelerate their growth and reproduction, increase the rate of gas production, and break the upper crust of the biogas slurry.
5. Regular maintenance 1 Always check the switches and connectors for leaks. 2 It was found that the manure was crawled into the pipe, and the pump could be used to pump air into the pipe to eliminate it; the air pipe was found to be blocked by the manure, and fine wire could be used. 3 In the rainy season, underground pipes often contain water. A water bottle can be installed about 1m away from the duct to prevent water from clogging the pipes. 4 deal with air leakage is not obvious parts. The gas storage part of the biogas digester can be cleaned and wiped dry, repainted with 1:1.5 cement mortar once, with a thickness of about 3 cm, and then compacted with a biogas sealant brush for 3 to 4 times. 5 repair cracks fault. Crack faults generally include cracks in the shell, bottom of the pool, and vault, and can be chiseled into V-shaped grooves with a chisel, and cut into grooves 1 to 2 cm deep and 3 to 5 cm wide depending on the degree of cracking. , And clean, first with a pure grout brush 1 times, and then use fine sand cement inlay compaction (such as shallow V-shaped groove, the repair surface can be slightly higher than the pool surface), and finally with a pure cement brush 4 to 5 times. 6 Partial breakdown failure repair. Drill the fractured part of the bottom of the pool, dig out the filled crushed stone, remove the soft foundation soil, and fill it with crushed stone, and pour 5 to 10 centimeters thick with the marked cement concrete, and compact it. Compaction (the repair surface should be larger than the damage surface), and finally use pure grout to brush 4 to 5 times and timely maintenance. 7 Repair the site where the airway tube is loose and where the active cover is damaged. Loosening caused by the looseness of the airway tube, the chisel can be drilled on both the inner and outer sides of the airway tube with a chisel, and compacted with 1:2 cement mortar. Finally, the pure cement paste is painted. For the parts with severe impact on the lower edge of the movable cover, use fine-cemented grout to repair the hair after cutting, and only pure grout for the lighter damage.
6. Forbidden to enter the pool Most plants can be used as raw materials of biogas digesters, which can generate biogas after decomposition, but organic bactericides, antibiotics, crop stems and leaves that have just been sprayed with pesticides, and ginkgo leaves, walnut leaves, skunk leaf, grasshopper Leaves, paulownia leaves, bitter buckwheat leaves, bitter herbs, ginkgoli, heartbroken grass, hot scorpions, stems and other plants are prohibited from entering the pool because they inhibit or kill the bacteria in the digester. Similarly, it is not possible to use highly toxic pesticides to kill maggots in toilets and poultry houses so as to avoid gas production difficulties in the pool. Peanut cakes, bean cakes, and cottonseed cakes produce phosphine in the absence of air, which is not only unfavorable to the bacteria that produce methane, but also prone to poisoning after contact with humans and livestock, and must be prohibited from entering the pool. Do not add phosphorus and other substances such as bone meal and rock phosphate to the biogas digester to prevent the production of highly toxic phosphine trihydrogen gas, which poses a danger to people entering the pool for maintenance.
7. The safe biogas digester 1 has been put in, no matter whether the gas production is running, it is not allowed to discharge or overhaul the pool. 2 Biogas lamps and stoves should be placed in a safe and convenient place away from flammable materials. 3 Any person who needs to discharge material from the pool or overhaul, must abide by the following rules: open the movable cover to drain the combustible gas in the pool; the digester with no movable cover should pull off the air pipe on the air pipe; the operator should stand outside the pool , with the material out of the liquid as much as possible to remove the net; the pool of residual liquid must be in and out of the material below the baffle to facilitate the formation of air convection in the pool; the use of artificial or mechanical methods to the air inside the pool, update the air in the pool; Animals such as chickens, ducks, rabbits, etc. are placed in the pool and observed for 15-30 minutes. If the animal activities are normal, the personnel can go to the pool; the lower pool personnel should be fastened with strong safety ropes, and there should be special care outside the pool. Can not use open flame lighting.
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