Method for preparing full nutritional high nitrogen type liquid flush fertilizer by monosodium glutamate waste liquid and product

Abstract

The invention discloses a method for preparing a full nutritional high nitrogen type liquid flush fertilizer by monosodium glutamate waste liquid and a product, and belongs to the technical field of production of liquid flush fertilizers. The preparation process comprises the following steps of: 1, performing quadruple effect concentration for monosodium glutamate waste liquid; 2, adding ammonia water in a certain proportion to the concentrated liquor, and adjusting pH value through neutralization reaction; 3, mixing the mixed liquid, urea, potassium sulphate, and ammonium polyphosphate saturated liquid in volume percentage of 50-60%, 15%, 15% and 10%; and 4, adding magnesium sulfate, zinc sulfate, ferrous sulfate and borax saturated liquid in volume percentage of 1-2% in the mixed liquid for chelation reaction. According to the invention, three nitrogen adding processes are performed, and the full nutritional high nitrogen type (25% of N) fertilizer is prepared through chelation reaction of amino acids in the monosodium glutamate waste liquid and ammonium polyphosphate and trace elements added. According to the invention, the deficiency that precipitates are produced by phosphate radicals and medium trace elements and the liquid flush fertilizer in low in nitrogen is overcome, so that the process is simple and the cost is low. Field trail results of greenhouse vegetable show that the yield-increasing effect is remarkable and the quality of vegetables is remarkably improved.

Description

1. Technical field [0001] The present invention relates to a resource utilization method of high-concentration monosodium glutamate organic waste liquid and related products, more specifically, to a method and product for preparing full-nutritional high-nitrogen type liquid fertilizer by utilizing high-concentration monosodium glutamate organic waste liquid. It belongs to the technical field of resource utilization of industrial waste water. 2. Background technology [0002] MSG is widely used in household, catering, food processing, pharmaceutical and other industries. my country is a big producer of monosodium glutamate, with an annual output of more than half of the world's output. According to incomplete statistics, the total output of monosodium glutamate in China in 2010 was about 1.706 million tons, accounting for 75% of the total output of monosodium glutamate in the world. Most of the monosodium glutamate production in my country uses corn as raw material and is p...

AI Technical Summary

Problems solved by technology

The current problem of this method is that the corresponding equipment investment, operating costs and production costs remain high, which affects the promotion of this technology

(2) Production of biopesticides: Using monosodium glutamate wastewater to cultivate Bacillus thuringiensis in an industrial process can obtain highly toxic and environmentally friendly biopesticides. This method currently has the problem of large-scale technical process obstacles

At the same time, the secondary wastewater after the production of biopesticides still has a high COD content, how to further treat it is also a problem that needs to be solved in this process

(3) Production of feed bacterial protein: Since the fermentation liquid produced by MSG contains 5% to 8% wet bacterial cells, the extracted suspension is rich in single-cell protein, which can produce feed protein and has high resource utilization value , but this method can only remove suspended solids in the waste liquid, which still contains a large amount of ammonia salt and COD, which will cause secondary pollution after discharge. main issues addressed

But this method has high energy consumption, spray granulation is subjected to high temperature during the production process, many active ingredients are destroyed, and the pH value is about 3.5-4, and the application of base fertilizer in acidic soil, drought or water shortage will damage the root system of crops , or problems such as excessive carbonization and poor water solubility, in actual production, the production process must be improved according to local conditions in order to play a better role

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