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A kind of recovery processing method of amino acid mother liquor

A technology for recovery and treatment of amino acids, which is applied in the field of recovery and treatment of amino acid mother liquor, which can solve problems such as poor operation safety, prone to danger, and serious equipment corrosion, and achieve the effects of eliminating inhibition and poisoning, reducing production costs, and improving removal rates

Active Publication Date: 2019-12-13
内蒙古拜克生物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Breakpoint chlorination process The disadvantages of this method are large amount of chlorine addition, high cost, poor operation safety, serious equipment corrosion, and easy danger. L of ammonia nitrogen consumes an alkalinity of 14.3mg / L, thereby increasing the content of total dissolved solids, which is more suitable for the treatment of low-concentration ammonia nitrogen wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for recycling amino acid mother liquor, comprising the following steps:

[0045] (1) Amino acid waste liquid is collected and concentrated 15 times;

[0046] (2) adding 20 mg / L of sodium sulfide and chitosan of 1500 ppm to adjust the pH value to 3, precipitate and separate to obtain precipitate and supernatant;

[0047] (3) Filtrating the supernatant with a cellulose acetate microfiltration membrane with a pore size of 0.1 μm to obtain a filtrate;

[0048] (4) Add unslaked lime, stir, pass into air and blow off; When precipitation no longer occurs, stop adding, otherwise continue;

[0049] (5) Adjust the pH value to 2, control the temperature to 30°C, add 0.6g / L brewer's yeast strain, and cultivate on a shaking table to remove COD;

[0050] (6) Stir again, feed air and blow off;

[0051] (7) Drain the observation pool and adjust the pH value to 7.

Embodiment 2

[0053] A method for recycling amino acid mother liquor, comprising the following steps:

[0054] (1) Amino acid waste liquid is collected and concentrated 10 times;

[0055] (2) Add 10 mg / L of sodium sulfide and 1000 ppm of gelatin to adjust the pH to 1, precipitate and separate to obtain precipitate and supernatant;

[0056] (3) Filtrating the supernatant with a cellulose acetate microfiltration membrane with a pore size of 0.2 μm to obtain a filtrate;

[0057] (4) Add unslaked lime, stir, pass into air and blow off; When precipitation no longer occurs, stop adding, otherwise continue;

[0058] (5) Adjust the pH value to 5, control the temperature to 20° C., add 0.5 g / L cider yeast strain, and culture on a shaking table at 50-100 rpm to remove COD;

[0059] (6) Stir again, feed air and blow off;

[0060] (7) Drain the observation pool and adjust the pH value to 6.

Embodiment 3

[0062] A method for recycling amino acid mother liquor, comprising the following steps:

[0063] (1) Amino acid waste liquid is collected and concentrated 20 times;

[0064] (2) adding 20 mg / L of sodium sulfide and chitosan of 2000 ppm to adjust the pH value to 5, precipitate and separate to obtain precipitate and supernatant;

[0065] (3) Filtrating the supernatant with a cellulose acetate microfiltration membrane with a pore size of 0.2 μm to obtain a filtrate;

[0066] (4) Add unslaked lime, stir, pass into air and blow off; When precipitation no longer occurs, stop adding, otherwise continue;

[0067] (5) Adjust the pH value to 1, control the temperature to 35°C, add 1g / L of Candida strain, culture on a shaking table, and remove COD;

[0068] (6) Stir again, feed air and blow off;

[0069] (7) Drain the observation pool and adjust the pH value to 6.5.

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Abstract

The invention belongs to the field of amino acid production wastewater treatment, and particularly relates to a method for recycling an amino acid mother liquor. The method reduces the COD value and ammonia nitrogen in the amino acid waste liquid while recycling the amino acid mother liquor through concentrating, precipitating, filtering, yeast culture processes, and is a green treatment technology.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a method for recycling and treating amino acid mother liquor. Background technique [0002] Amino acid is the most basic substance related to life activities, the basic unit that constitutes the protein of organisms, and has a close relationship with the life activities of organisms. It has special physiological functions in organisms and is one of the indispensable nutrients in organisms. Amino acids are widely used in chemical industry, medicine and food. Amino acids are artificially produced and synthesized in large quantities through biological fermentation and chemical methods. In the process of amino acid production, a large amount of production wastewater is often discharged, which brings many serious environmental pollution problems. The treatment of wastewater in the amino acid production industry has attracted increasing attention. In the production p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/20C02F101/30
CPCC02F1/20C02F1/444C02F1/5236C02F1/56C02F1/66C02F3/34C02F9/00C02F2001/007C02F2101/20C02F2101/30
Inventor 常俊义陈峰钟迎东叶朋侯争平
Owner 内蒙古拜克生物有限公司