Method for producing biological fermentation compound fertilizer from organic waste water by glutamic acid fermentation

Abstract

The invention discloses a method for producing a biological fermentation compound fertilizer from organic waste water by glutamic acid fermentation. The method is characterized in that the method is prepared by the following raw materials: glutamic acid fermentation waste liquid, allyl acrylate, potassium phosphate, potassium nitrate, and ammonium phosphate. The method mainly comprises the following steps: multiple-effect evaporative concentration of glutamic acid fermentation waste liquid, extraction of mycoprotein, multiple-effect condensation, low temperature spraying and fluidizing granulation (adding of inorganic components), screening and cooling, so as to obtain the biological fermentation compound fertilizer finished product. The method can be used for overcoming hidden troubles of secondary pollution for atmosphere and soil pollution due to carbide which are caused by coking decomposition of organic matter components at high temperature in spraying granulation process. An innovation road is developed for zero discharge of organic waste water.

Description

technical field [0001] The invention relates to the field of agricultural compound fertilizer production, in particular to a method for producing biologically fermented compound fertilizer by using glutamic acid to ferment organic waste water. Background technique [0002] At present, the glutamic acid-producing bacteria used in industry include Corynebacterium glutamicum, Brevibacterium lactose fermenterum, Brevibacterium spirochete, Brevibacterium flavum, Brevibacterium ammoniaphagosus, etc. [0003] At present, most glutamic acid fermentation production enterprises produce glutamic acid through biological fermentation, and react with sodium hydroxide or sodium carbonate to form monosodium glutamate (monosodium glutamate). The main process flow is: starch → glucose → (biological fermentation) → glutamic acid → (refining) → monosodium glutamate (MSG). Extract glutamic acid from the fermentation broth to become fermentation waste liquid, which contains a large amount of bac...

AI Technical Summary

Problems solved by technology

However, in the process of evaporating a large amount of water vapor, the organic matter in the fermentation waste liquid is coked and decomposed under high temperature conditions, forming smoke that is difficult to diffuse, and has obvious odor and burnt taste, causing serious air pollution

In addition, fertilizers made at high temperatures of 500°C to 600°C have hidden dangers of soil pollution.

Because at a high temperature of 500°C to 600°C, the water-soluble substances in the slurry are prone to undergo condensation chemical reactions to form "high-temperature chemical bonds". After "high-temperature spray granulation", the original water-soluble substances undergo thermochemical reaction transformation Become water-insoluble or insoluble substances, it is difficult to decompose when applied to soil microorganisms, and there is also a potential pollution to the soil

Under the pressure of today's environmental protection requirements, the secondary pollution of the atmosphere and the hidden dangers of soil pollution caused by high-temperature spray granulation will seriously restrict the development of glutamic acid fermentation plants

[0005] 2. Fertilizers are not easy to meet the standards. In the process of high-temperature spray granulation to form fertilizers, the concentrated fermentation waste liquid is directly sprayed into mist droplets. Under high temperature conditions, the moisture in the mist droplets is dried to form solids. This process obtains The fertilizer used is relatively simple, it can only be the substance in the fermentation waste liquid, and its composition should not be changed

The fertilizer industry has national standards, and it is difficult for biofermentation (organic-inorganic compound) fertilizers made through "high temperature spray granulation" to meet the standards of the fertilizer industry

[0006] 3. High energy consumption

[0008] 4. Large investment in equipment and difficult treatment of organic waste gas. "High-temperature spray granulation" uses high-pressure gas to make the concentrated fermentation waste liquid form a mist in the spray granulator, and the process of drying the water in the droplets by high-temperature hot air , there is a strict limit on the amount of spraying, and only when the number of spraying and granulation equipment is sufficient can the requirements for the treatment of fermentation waste liquid be met

These governance facilities not only require a large investment but also have a short lifespan, and the governance is still incomplete, which increases the economic burden on the enterprise

[0009] Due to the above shortcomings of the "high temperature spray granulation" process, especially the secondary pollution of tail gas and the hidden danger of soil pollution, the development of glutamic acid fermentation plants has been seriously restricted.