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Method for treating folic acid wastewater

A treatment method and technology for wastewater, applied in water/sewage treatment, natural water treatment, water treatment parameter control, etc., can solve the problems of complex operation, high energy consumption and high cost, and achieve a simple operation method, low cost and energy saving. Effect

Inactive Publication Date: 2019-07-26
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the above-mentioned prior art, the present invention provides a treatment method for folic acid wastewater to solve the technical problems in the prior art that the treatment of folic acid wastewater is complex operation, high energy consumption and high cost

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  • Method for treating folic acid wastewater

Examples

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Effect test

Embodiment 1

[0028] First, take 200ml of folic acid wastewater, the pH of folic acid wastewater is 0.5, the COD value is 2000mg / L, the ammonia nitrogen value is 210mg / L, and the total dissolved solids is 25000mg / L; add sodium hydroxide, adjust the pH to 4.3, and obtain the solution; then, pour the solution to be treated into the filter tank, and filter it with a filter membrane of 0.45 μm; after the filtration is completed, obtain the filtrate; then pour the filtrate into the rotary evaporator to ensure that the pressure is controlled at 0.04Mpa and the temperature is 80 °C, the concentration rate is 50%, and after the distillation is completed, a condensate is obtained, that is, effluent is obtained.

[0029] Measure the content of COD, ammoniacal nitrogen and TDS in the effluent of Example 1, wherein the removal rate of COD is 97.9%, the extraction rate of ammoniacal nitrogen is 93.9%, and the removal rate of TDS is greater than 99%.

Embodiment 2

[0031] First, take 100ml of folic acid wastewater, the pH of folic acid wastewater is 1.1, the COD value is 9500mg / L, the ammonia nitrogen value is 330mg / L, and the total dissolved solids is 42000mg / L; add sodium hydroxide, adjust the pH to 4.2, and obtain the solution; then, pour the solution to be treated into the filter tank, and filter it with a 0.22 μm filter membrane; after the filtration is completed, obtain the filtrate; then pour the filtrate into a rotary evaporator to ensure that the pressure is controlled at 0.06Mpa and the temperature is 90 °C, the concentration rate is 60%, and after the distillation is completed, a condensate is obtained, that is, effluent is obtained.

[0032] Measure the content of COD, ammoniacal nitrogen and TDS in the effluent of Example 2, wherein the removal rate of COD is 99.4%, the extraction rate of ammoniacal nitrogen is 95.7%, and the removal rate of TDS is greater than 99%.

Embodiment 3

[0034] First, take 500ml of folic acid wastewater, the pH of folic acid wastewater is 2.3, the COD value is 30000mg / L, the ammonia nitrogen value is 600mg / L, and the total dissolved solids is 60000mg / L; add sodium hydroxide, adjust the pH to 4.0, and obtain solution; then, pour the solution to be treated into the filter tank, and filter it with a filter membrane of 0.45 μm; after the filtration is finished, obtain the filtrate; then pass the filtrate into the MVR reactor to ensure that the pressure is controlled at 0.05Mpa and the temperature is 85 °C, the concentration rate is 50%, and after the distillation is completed, a condensate is obtained, that is, effluent is obtained.

[0035] Measure the content of COD, ammoniacal nitrogen and TDS in the effluent of Example 3, wherein the removal rate of COD is 99.8%, the extraction rate of ammoniacal nitrogen is 98.5%, and the removal rate of TDS is greater than 99%.

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Abstract

The invention provides a method for treating folic acid wastewater. The method for treating the folic acid wastewater includes the steps of firstly, regulating the pH value of the folic acid wastewater to 4.0-4.5 so as to obtain a solution to be treated; then, filtering the solution to be treated so as to obtain filtrate; finally, subjecting the filtrate to reduced-pressure distillation so as to obtain effluent up to the discharge standards. The method for treating the folic acid wastewater has the advantages that treating the folic acid wastewater by regulation of the pH value, filtering andreduced-pressure distillation, the method decreases the content of COD, ammonia nitrogen, TDS and total nitrogen in the folic acid wastewater and avoids over-high cost for treating the folic acid wastewater and environmental pollution caused by substandard treatment of the folic acid wastewater; the method is convenient to operate and manage, effective in treatment at a low cost and environment friendly, and the effluent can be up to the discharge standards directly.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, in particular to a treatment method for folic acid wastewater. Background technique [0002] Folic acid (folate, folic acid), also known as vitamin B9, vitamin Bc, vitamin M, pteroyl glutamic acid, is a water-soluble vitamin and an important nutrient for the growth and development of humans and animals. However, natural folic acid is extremely unstable and is easily oxidized by sunlight and temperature. Humans and animals do not get much folic acid from food. Therefore, synthetic folic acid is widely used in medical treatment, breeding, food and other industries, and the market has a great demand for synthetic folic acid. At present, the method used in the industrial synthesis of folic acid is mainly to react with 1,1,3-trichloroacetone and p-aminotoluoyl-L-glutamic acid, add 2,4,5-triamino-6-hydroxypyrimidine, adjust And maintain the pH to 3.5, after suction filtration,...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F103/36
CPCC02F1/001C02F1/04C02F1/041C02F1/66C02F9/00C02F2103/36C02F2209/02C02F2209/03C02F2209/06C02F2209/08C02F2209/10C02F2209/14C02F2301/063
Inventor 袁林江孟元黄崇
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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