Method of utilizing monosodium glutamate waste liquid to prepare nutrient substrate additive for greening

Abstract

The invention provides a preparation and use method of a nutrient substrate additive suitable for greening side road slopes, bare mountain bodies (quarries and mining areas) and urban green land, in particular to a functional liquid material which is prepared by evaporating and concentrating waste liquid discharged by monosodium glutamate factories and adding a chelating agent and sulphate (or oxide) for a chelation reaction and has the functions of supplying and preserving fertilizer and improving soil. The material as the nutrient substrate additive not only can find a new path for the resource utilization of monosodium glutamate waste liquid, but also can provide a new solution scheme for environment greening, in particular to the problems of vegetation degeneration, and the like, which are prone to occur because soil fertility is hard to endure and balance during the greening under the adverse conditions of soil depletion, nutrient stress, moisture stress, and the like, thereby having wide application prospect.

Description

technical field [0001] The invention relates to a resource utilization method of monosodium glutamate waste liquid, more specifically, relates to a method for preparing nutrient matrix additives for greening by using monosodium glutamate waste liquid. Background technique [0002] my country is the world's largest producer and consumer of MSG, and its annual output is about half of the world's output. At present, the production of monosodium glutamate in my country mostly uses grain as raw material and is produced by fermentation. To produce 1 ton of monosodium glutamate requires 4 tons of rice (or 3 tons of starch), 0.61 to 0.74 tons of urea (280 to 340 kg of nitrogen), and 140 to 150 kg of sulfuric acid, except that part of it becomes glutamic acid and escaped carbon dioxide gas , most of which are discharged with the mother liquor in the form of bacterial protein, residual sugar, amino acid, ammonium salt, organic acid and acid radical, resulting in a large amount of was...

AI Technical Summary

Problems solved by technology

Although these treatment methods have reduced the pollutant content of the waste liquid to a certain extent and reduced the environmental pressure, there are still some technical defects or disadvantages more or less, which are manifested in: (1) due to the pollution load of the MSG waste liquid If it is too high, the treatment effect and efficiency of the above-mentioned treatment system often cannot meet the corresponding requirements, so that the treatment is not complete, and the drainage still contains some substances that will put pressure on the environment, and it will also show pollution to the environment after long-term accumulation; ( 2) Some methods consume a lot of energy. Although some by-products can be obtained during the treatment process, the value of these by-products often cannot offset the treatment cost; (3) Although biological fermentation technology is an energy-saving treatment method, the fermentation product Extraction is a new problem

Therefore, although the existing technologies can reduce pollutants or recover useful substances to a certain extent, they have not really achieved the goal of environmental pollution control or complete resource recycling.

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