Organic fertilizer prepared by waste phosphate tailing powder and preparation method thereof

Abstract

The invention discloses organic fertilizer prepared by waste phosphate tailing powder, which comprises the following raw materials by weight: 20-35 parts of phosphate tailing powder, 20-40 parts of crop straw powder, and 20-40 parts of soy sauce residues. The preparation method comprises the following steps: well mixing the crop straw powder and the soy sauce residues according to the weight ratios, adding water with a material-water ratio of 1:2-1:3, inoculating 4-5% of aspergillusniger, 2-3% of lactobacillus, 3-4% of acetobacter, and 4-6% of bacillus megaterium, performing fermentation at 28-32 DEG C for 3-5 days; adding 15-20% of water, performing fermentation at 50-65 DEG C for 10-15 days; drying, and packaging. The organic fertilizer of the invention has comprehensive nutrition, and lasting fertilizer efficiency, can improve the physical and chemical properties and biological activity of soil, and has low production cost.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to an organic fertilizer, and also to a production method of the organic fertilizer. [0002] Background technique [0003] Phosphate rock resources are non-renewable resources. Although my country is a country with a large amount of phosphorus resources, the total reserves of phosphate rocks are large; however, 80% of the phosphate rocks in our country are medium and low-grade phosphate rocks, and 7000kt of phosphate rock tailings will be produced every year. Millions of tons of phosphorous tailings powder. Due to the low grade of P2O5 and high content of harmful impurities in the tailings, it has no economic value to produce phosphoric acid or phosphate fertilizer through industrial treatment, so a large amount of phosphorus tailings are not used or even discarded. At the same time, a large amount of accumulation of phosphate rock tailings will not only occupy a large area o...

AI Technical Summary

Problems solved by technology

Due to the low grade of P2O5 and high content of harmful impurities in the tailings, it has no economic value to produce phosphoric acid or phosphate fertilizer through industrial treatment, so a large amount of phosphorus tailings are not used or even discarded.

At the same time, a large amount of accumulation of phosphate rock tailings will not only occupy a large area of ​​land and farmland resources, but also consume a lot of yard construction and maintenance costs; and open-air storage, long-term exposure to wind, sun, and rain, harmful components will pass through the atmosphere , soil surface or groundwater and other media destroy the ecological environment and cause serious pollution to the environment. Today, as resources are dwindling, phosphorus tailings, as a secondary resource, have attracted worldwide attention

For a long time, phosphate ore tailings have not been well utilized. At present, the utilization of phosphate ore tailings is mainly to use tailings sand as roadbed filler, to produce bricks for walls, and to produce phosphorus-magnesium compound fertilizers by chemical methods, etc.