Method for preparing compound amino acid organic liquid fertilizer

Abstract

The invention provides a method for preparing a compound amino acid organic liquid fertilizer. The method takes cheap fermentation industrial waste water as raw material and carries out filtration, evaporation concentration, primary evaporation crystallization, second evaporation crystallization, cooling crystallization, standing, salting-out and other process steps, thereby obtaining the high-valued and high-fertilizer efficiency compound amino acid organic liquid fertilizer. The method does not occupy high-priced limited soybean meal, blood meal, starch, other acid and basic chemical medicaments and other resources and greatly reduces the product cost; meanwhile, water-insoluble substances produced by filtration during the process can be used as protein supplement feeds for ruminants, sulfate and amino acid organic solid fertilizers are good fertilizers, and the method leads the fermentation industrial waste water to be completely recovered and utilized, has wide range of applications and is not only suitable to be completed on a small-investment evaporator at normal pressure, but also suitable to be completed on an advanced energy-saving consumption-reducing vacuum evaporation crystallization device at negative pressure; furthermore, the method does not emit any substance to the outside and does not produce any pollution.

Description

technical field [0001] The invention relates to a method for preparing a compound amino acid organic liquid fertilizer, in particular to a method for producing a compound amino acid organic liquid fertilizer by using fermentation industrial waste liquid, which belongs to the technical field of chemical fertilizer industry. Background technique [0002] Amino acid liquid fertilizer is a new low-salt index organic nitrogen fertilizer, which is safe to use and has excellent fertilizer efficiency. However, the amino acid liquid fertilizer produced by the existing technology is not only complicated in production process, but also the cost of amino acid liquid fertilizer remains high due to the high cost of raw materials. Therefore, although amino acid liquid fertilizer has excellent fertilizer performance, the high production cost makes it difficult to popularize and apply amino acid liquid fertilizer on a large scale. With the launch of the concept of green organic agriculture,...

AI Technical Summary

Problems solved by technology

However, the amino acid liquid fertilizer produced by the existing process is not only complicated in production process, but also due to the high cost of raw materials, the cost of amino acid liquid fertilizer remains high

Therefore, although amino acid liquid fertilizer has excellent fertilizer performance, the high production cost makes it difficult to popularize and apply amino acid liquid fertilizer on a large scale.