The comprehensive utilization of biogas slurry

The comprehensive utilization of biogas slurry

Biogas fermentation is not only a process of producing biogas energy, but also a process of fattening. In this process, the nutrients such as nitrogen, phosphorus and potassium required for crop growth are basically maintained, so the biogas slurry is a good organic fertilizer. At the same time, the biogas slurry contains abundant amino acids, B vitamins, various hydrolases, certain auxins, substances or factors that inhibit pests and diseases, so it can also be used to raise fish, feed pigs, feed cattle, Some pests and diseases that control crops have broad prospects for comprehensive utilization.

1. Application of biogas slurry in planting industry:

Soaking seeds in biogas slurry: soaking rice seeds and seedlings in biogas slurry, soaking wheat seeds in biogas slurry, soaking corn seeds in biogas slurry, soaking cotton seeds in biogas slurry, and soaking sweet potato seeds in biogas slurry.

Biogas slurry control of plant diseases and insect pests: 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.

Biogas slurry improves plant stress resistance: biogas slurry is rich in 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 can be absorbed in leaves within one day and night. More than 80% of the application rate 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.

2. Application of biogas slurry on fruit trees:

Foliar fertilization of biogas slurry: The nutrient content in the biogas slurry is relatively enriched, which is a quick-acting water and fertilizer, which is used for fertilization of fruit leaves, with quick effect and high utilization rate. Generally, within 24 hours after application, the leaves can absorb about 80% of the spraying amount, so that the nutrient needs of fruit trees can be replenished in time. Before and after the growth period of the above-ground part of the fruit tree, the biogas slurry can be sprayed. The long-term spraying of the biogas slurry can enhance the photosynthesis and facilitate the formation and differentiation of the flower buds. Spraying the biogas slurry during the flowering period can ensure the required nutrients and improve the seat. Fruit rate; spraying biogas slurry during fruit growth period can promote fruit enlargement and increase yield.

3. Application of biogas slurry in aquaculture industry:

Boiler for biogas slurry: Pigs fed with biogas slurry, good appetite, no leftovers, good looks, strong body, no running, no arch, love to sleep. Adding biogas slurry to feed pigs, the average weight per kilogram, saving 0.812 kg of feed, the feed conversion rate increased by 12.9%, shortening the feeding cycle by about 1 month, and reducing the cost by about 35%.

Feeding cows and chickens with biogas slurry: Mixing the feed with normal fermented biogas slurry, mixing and feeding cows and chickens, all of which can receive better feeding effects. The specific method is basically the same as adding biogas slurry to raise pigs. The various nutrients and hormones contained in the biogas slurry can stimulate the milk production function of the cow's milk system, thereby increasing the milk production. According to the experiment of rural energy station in Ruichang County of Jiangxi Province, the cows were fed with the ratio of biogas slurry and feed volume of 1:1 to 2, and the average milk yield per day of the test cattle increased by 2.29 to 2.4 kg.

Biogas liquid fish farming: As a feed for freshwater aquaculture, biogas slurry is not only nutritious, but also accelerates the reproduction of plankton in fish ponds, reducing oxygen consumption and improving water quality. Moreover, the common biogas slurry can maintain the brown color of the water surface, absorb the light and heat, increase the water temperature, and the pH of the biogas slurry is neutral to the alkali, which can keep the fish pond neutral, and these favorable factors can promote the better growth of the fish. Therefore, biogas fertilizer is a good nutrient bait for fish farming.