With the sustainable development of ecological agriculture, people's enthusiasm for developing biogas ecological agriculture is getting higher and higher, and the use of biogas residue is gradually being developed and utilized. After years of painstaking research and development, the expert group of Beijing Huimin Da Science and Technology Development Center has explored a set of original biogas residue biological fermentation technology by means of bioengineering. The produced biogas residue decomposition agent is a patented product, pure microbial strain, environmental protection and pollution-free, low operating cost, small floor space and low energy consumption, which has been recognized and praised by the market and obtained the registration number of the Ministry of Agriculture. 1. Biogas residue is rich in organic matter, humus, micronutrients, various amino acids, enzymes and beneficial microorganisms. The texture is loose, the water retention is good, and the pH value is moderate. It can play a good role in improving the soil by decomposing it with a decomposing agent.
Second, biogas residue contains nitrogen, phosphorus, potassium and other elements, which can meet the needs of crop growth.
Thirdly, the biogas residue also contains a lot of biogas slurry, and the solid content is below 20%. Some undecomposed raw materials and new microbial cells will continue to ferment and release fertilizer after being applied to farmland. Therefore, in the process of comprehensive utilization, biogas residue has two functions of quick-acting and after-effect, and can be used as base fertilizer and topdressing, which can not only reduce the application amount of chemical fertilizers and pesticides, reduce the cost, but also effectively improve the yield and quality of crops. Biogas residue is mainly used as base fertilizer for crop production or seedling production, and can also be used for producing edible fungi, fish farming and earthworm farming.