Process for reducing heavy metal content in livestock manure organic fertilizer

Abstract

The invention discloses a process for removing residual antibiotics in livestock manure and accelerating compost fermentation. The process includes preparing a mixture according to the weight percentage of air-dried materials which comprise 30-40% of an organic material, 60-70% of livestock manure, 0.1% of a microbial inoculum and 5% of Shuangshanzi volcanic slag particles, wherein a formation process of the Shuangshanzi volcanic slag particles includes soaking the Shuangshanzi volcanic slags with mixed deionized water of phosphoric acid and methanol, placing the mixture into equipment for pyrolysis or gasification of biomass, and heating to form the Shuangshanzi volcanic slag particles under the condition of reducing oxygen supply; diluting quicklime and loess added to the mixture, and removing salt at the same time; electrolyzing the mixture after salt removal; adding a redox medium into the electrolyzed mixture, and placing the mixture in an oxygen-enriched environment for aging until a composition with certain water porosity and air porosity is formed; fermenting; and sieving the fermented materials to form an organic fertilizer.

Description

technical field [0001] The invention relates to an organic fertilizer, in particular to a process for reducing the content of heavy metals in the organic fertilizer of poultry manure. Background technique [0002] Livestock manure is one of the important raw materials for the preparation of high-quality organic fertilizers. The use of livestock manure to prepare organic fertilizers is not only a waste resource utilization method, but also an important way to avoid or reduce environmental pollution. At present, most of the government departments where the major breeding bases are located are promoting the production of organic fertilizers to reduce environmental pollution and increase soil fertility with organic fertilizers. Most domestic enterprises generally add high doses of copper, zinc, arsenic, selenium and other micronutrient elements needed to promote the growth and development of livestock and poultry in the feed. These heavy metal-contaminated livestock and poultry ...

AI Technical Summary

Problems solved by technology

Most domestic enterprises generally add high doses of copper, zinc, arsenic, selenium and other micronutrient elements needed to promote the growth and development of livestock and poultry in the feed. These heavy metal-contaminated livestock and poultry feeds are fed to livestock and poultry, and a large amount of heavy metals pass through the livestock and poultry. Poultry manure is excreted, and the agricultural use of these livestock and poultry manure will cause heavy metals to accumulate in the soil and risk exceeding the soil capacity and causing serious pollution to the soil