Benefit Analysis of Comprehensive Utilization of 8 cubic meters of Biogas Digesters
I. Economic benefits
(1) Saving money.
Install an 8 cubic meter FRP ellipsoidal thermal biogas tank that can be operated continuously throughout the year, with an effective service period of more than 30 years. Under the premise of keeping four or five pigs to solve the source of raw materials, the annual output of biogas is 800-900 m3, and the biogas residue is 30-35 m3, and the biogas slurry is about 20 tons. Biogas, biogas residue and biogas slurry can be fully utilized. 1. Biogas is used as a daily anecdote for three meals a day for the whole family. The annual average coal saving is about 2 tons, and the fuel cost can reach 900 yuan. 2. The biogas is used for lighting, and the annual electricity cost can be saved by 200 yuan. 3. The biogas residue The biogas slurry is used as a fertilizer. The annual output of biogas fertilizer is about 5,000 kg, which is equivalent to about 3,000 kg of nitrogen fertilizer. It is equivalent to about 2,000 kg of phosphate fertilizer. It can be used for topdressing twice in 30 mu, saving about 2,000 yuan of chemical fertilizer. Because the biogas fertilizer has no pathogens and eggs, it can reduce the occurrence of crop diseases and insect pests, and can also save pesticides. The biogas fertilizer can also improve the soil and increase the soil organic matter content. 4. Use biogas slurry instead of pesticides to spray and prevent crop diseases and insect pests. The annual savings of pesticides can be more than 200 yuan. 5. Biogas slurry is used as feed additive to feed chickens and fish. , pigs, cattle, etc., can save more than 500 yuan in feed costs per year. Feeding pigs with a concentration of 1% biogas slurry as an organic compound additive, the daily weight gain is 640-660 g/head, the consumption of 48-60 kg/head is reduced, and the profit is 40 yuan/head. The biogas slurry feeds the cattle, sheep, chickens and ducks, which can improve the maternal pregnancy rate and the egg production rate of chickens and ducks. The biogas slurry is generally free of pathogenic bacteria and parasitic eggs. Pigs, cattle, and sheep are fed with biogas residue, and the biogas slurry is not susceptible to disease. The coat color is bright, the growth is robust, and the sheds are less mosquitoes and flies. According to the relevant data analysis, cattle and sheep are fed with biogas slurry, the cows gain 300-400 g/head, and the sheep gains 50-60 g/head.
In summary, during the year, a 8 cubic meter biogas digester can save farmers 3000-4000 yuan.
(ii) Generate benefits.
Deep processing of biogas slurry:
The nutrient content in the biogas slurry is relatively rich, and it is a quick-acting water fertilizer and a good feed additive.
Making flower fertilizer nutrient solution: Flower fertilizer nutrient solution is used as a liquid fertilizer and insecticide for flowers. The market price of 500ml glucose bottle is 2 yuan/bottle, the wholesale price is 1 yuan/bottle, 10 kg of fine biogas slurry is collected every day, 20 bottles are filled, the price is 20 yuan, the packaging cost is removed, and the annual profit is more than 7,000 yuan.
Making feed additives: After the biogas slurry is processed and filtered, it can feed pigs, feed cattle, feed chickens, and feed fish. Feeding pigs can shorten the feeding cycle by about 1 month, and the cost is reduced by about 35%. Feeding cattle can increase milk production by more than two kilograms per day; feeding chickens can increase egg production rate; feeding fish can promote better growth of fish.
Production of plant insecticides: Biogas fermentation raw materials, after anaerobic fermentation of biogas digesters, contain beneficial substances such as hormones and antibiotics that inhibit bacteria and improve plant stress resistance, and can be used for controlling plant diseases and insect pests and improving plant stress resistance. 1, prevention and control of crop aphids; 2, control of fruit tree red spider; 3, biogas control of barley yellow mosaic disease; 4, biogas slurry control of watermelon blight; 5, biogas slurry control wheat scab. In addition, the biogas slurry has strong inhibition and killing of cotton wilt and anthracnose, potato wilt, wheat root rot, rice sclerotium and sheath blight, corn smut and root rot. effect.
Production of plant soaking agents: The biogas slurry is rich in various water-soluble nutrients, which are used for soaking seeds, foliar sprays and roots of crops, fruit trees, etc., with high absorption rate and fast effect, and absorbable application amount in leaves within one day and night. More than 80% can timely supplement the nutrient needs of the plant growth period, strengthen the plant body, and enhance the ability to resist pests and diseases and severe cold and drought. In the dry period, the spraying of biogas slurry on crops and fruit trees can cause the stomata of the plant leaves to close, thus playing a role in drought resistance.
Deep processing of biogas residue:
The biogas residue is a semi-solid substance remaining in the bottom of the biogas tank after biogas fermentation. It is rich in organic matter, humic acid, crude protein, nitrogen, phosphorus, potassium and various trace elements. It is a high-quality organic with both speed and speed. Fertilizer and culture bait.
Formulated nutrient soil. Nutrient soil is used for seedlings of flowers and special crops. The market price of two or two bags of flower fertilizer is 1 yuan/bag, the wholesale price is 0.5 yuan/bag, and 5 kg of fine biogas residue is collected every day (dry material), which can be loaded for 50 bags. The price is 25 yuan, except for the packaging cost, the annual profit is about 8,000 yuan.
Organic fertilizer: rough biogas residue can be used as base fertilizer, topdressing, and organic fertilizer can be mixed with ammonium bicarbonate and superphosphate. Calculated by 5 yuan per day, the annual profit is about 1,800 yuan.
Cultivation of edible fungi: Biogas residue can also be used to cultivate mushrooms, cultivate oyster mushrooms, and cultivate Ganoderma lucidum to obtain greater profits.
Biogas residue culture: Biogas residue can also breed alfalfa, loach, scutellaria, soil mites, etc., indirectly creating benefits.
In addition, the biogas digesters drive the development of the aquaculture industry, keeping four or five pigs, two or three times a year, and selling more than 10 pigs. The net income of each pig is 100 yuan, which can increase 1,000 yuan.
In summary, during the year, all the biogas slurry and biogas slurry deep processing products of a 8 cubic meter biogas digester will be sold at least 20,000 yuan.
Second, ecological benefits
The development of biogas can promote the development of agriculture in the direction of no pollution and no waste, which is highlighted in the following aspects:
(1) Elimination of environmental pollution: Biogas fermentation can eliminate environmental pollution caused by agricultural and domestic waste such as human and animal waste, and can kill some germs and parasite eggs in the feces and improve rural living conditions.
(2) Reducing the amount of pesticides and pollution: Applying biogas fertilizer or spraying the biogas slurry on the foliage can prevent crops from pests and diseases, thereby reducing the amount of pesticides, reducing the amount of pesticide residues in agricultural products, and producing pollution-free green products.
(3) The transformation of agricultural waste resources into waste and comprehensive utilization is conducive to the virtuous cycle of ecosystems and the sustainable development of agriculture.
(4) Improve soil and increase farmland fertility: Long-term application of biogas fertilizer in cultivated land can improve soil physical and chemical properties, increase soil organic matter and various nutrient contents, and promote crop growth and yield increase.
(5) Reducing ecological man-made damage: The construction of biogas digesters will solve the farmers' energy resources, reduce the amount of fuelwood felling, reduce the pressure on farmland and pasture, increase the feed source of livestock, and help protect natural vegetation.
Third, social benefits
1. Improve the spirit of the peasants and promote the progress of rural social civilization. Biogas ecological agriculture technology has broken the old production mode that constrains the development of productive forces, arranged a large number of rural surplus labor, and improved labor productivity. 2. Trained a large number of biogas technical talents for the society. 3. Promote the production of pollution-free agricultural products, and provide a large number of pollution-free agricultural products to the society.
Fourth, the scale of the program
The construction of biogas is carried out on a large scale by the village, which is easy to manage, low in cost, high in efficiency, and has good comprehensive development prospects. After the installation amount of the household biogas digesters in the village reaches a certain amount, the comprehensive utilization of the property management method can be adopted for comprehensive utilization and development. Specific steps are as follows:
(1) More than 50 biogas digesters, and the Sanma Integrated Development Association (or cooperation association) will be established. Each user is a member.
(2) Each household will make a small amount of funds (the conditional village committee can solve the problem collectively), rent a processing workshop, and purchase production tools and laboratory equipment for use in processing biogas residue and biogas slurry.
(3) Regularly remove the biogas residue and biogas slurry from the farmers and concentrate on the processing workshop for processing.
(4) For villages with a large number of users of biogas digesters, or for concentration points in townships, companies can be established to carry out corporatization operations. In addition to deep processing of biogas residue and biogas slurry, vegetable greenhouses can be built to carry out diversified operations. Because biogas fertilizer and vegetables grown with biogas fertilizer are in short supply in Beijing and Tianjin, the larger the scale, the more favorable it is to open up the foreign market.
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