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Zero discharging method and device for vitamin B2 production waste water

A vitamin, zero-emission technology, applied in chemical instruments and methods, water pollutants, multi-stage water treatment, etc., can solve problems such as high salt content, waste of resources, recycling, etc., achieve environmental protection and economic benefits, and solve difficult problems. Processing, technologically advanced effects

Pending Publication Date: 2017-02-22
JIANGSU NINE HEAVEN HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above reports all use the biochemical method as the main process, but often the vitamin B2 wastewater has a high salt content, the biochemical method is not applicable, and all of them take the discharge as an indicator, and the valuable components in the wastewater such as vitamin B2 are not recovered, resulting in a waste of resources

Method used

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  • Zero discharging method and device for vitamin B2 production waste water
  • Zero discharging method and device for vitamin B2 production waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] S1: Vitamin B in acidic wastewater (pH about 1 to 3) from the production section 2 The concentration is 1.20g / L, adjust the pH to 6 with liquid caustic soda first, mix with the first-stage nanofiltration membrane retentate returned in the later stage, and then vitamin B 2 The concentration is 1.25g / L, and then sent to the organic tubular membrane system, the pore size of the organic tubular membrane is 30nm, the control operating pressure is 0.3MPa, and the average flux of the membrane is 102L / m 2 h, vitamin B 2 The crystals are retained, and vitamin B in the retained concentrate 2 The concentration is 32.5g / L, the concentrated solution meets the requirements of recrystallization, and vitamin B is obtained through recrystallization 2 Product, product purity is 99.76%, vitamin B in permeate 2 Concentration 560mg / L;

[0033] S2: The permeate of the organic tubular membrane system is sent to the first-stage nanofiltration system for separation. The molecular weight cut...

Embodiment 2

[0036] S1: Vitamin B in acidic wastewater (pH about 1 to 3) from the production section 2 The concentration is 3.21g / L, adjust the pH to 7 with liquid caustic soda first, mix with the first-stage nanofiltration membrane retentate returned in the later stage, and then vitamin B 2 The concentration is 3.23g / L, and then sent to the organic tubular membrane system, the organic tubular membrane pore size is 50nm, the control operating pressure is 0.55MPa, and the average flux of the membrane is 86L / m 2 h, vitamin B 2 The crystals are retained, and vitamin B in the retained concentrate 2 The concentration is 41.6g / L, the concentrated solution meets the requirements of recrystallization, and vitamin B is obtained through recrystallization 2 Product, product purity is 99.85%, vitamin B in permeate 2 Concentration 756mg / L;

[0037] S2: The permeate of the organic tubular membrane system is sent to the first-stage nanofiltration system for separation. The molecular weight cut-off of...

Embodiment 3

[0040] S1: Vitamin B in acidic wastewater (pH about 1 to 3) from the production section 2 The concentration is 1.89g / L, adjust the pH to 5 with liquid caustic soda first, mix with the first-stage nanofiltration membrane retentate returned in the later stage, and then vitamin B 2 The concentration is 1.93g / L, and then sent to the organic tubular membrane system, the pore size of the organic tubular membrane is 30nm, the control operating pressure is 0.4MPa, and the average flux of the membrane is 98L / m 2 h, vitamin B 2 The crystals are retained, and vitamin B in the retained concentrate 2 The concentration is 35.4g / L, the concentrated solution meets the requirements of recrystallization, and vitamin B is obtained through recrystallization 2 Product, product purity is 99.85%, vitamin B in permeate 2 Concentration 632mg / L;

[0041] S2: The permeate of the organic tubular membrane system is sent to the first-stage nanofiltration system for separation. The molecular weight cut-...

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Abstract

The invention relates to the technical field of waste water treatment, in particular to a zero discharging method and device for vitamin B2 production waste water. The method includes the steps: (1) feeding the vitamin B2 production waste water into an organic tubular membrane system, concentrating the waste water to obtain tubular membrane concentrated solution and tubular membrane permeated solution, and subjecting the tubular membrane concentrated solution to recrystallization and drying to obtain vitamin B2; (2) delivering the tubular membrane permeated solution into a nano-filtration system, performing separation to obtain nano-filtration permeated solution and nano-filtration concentrated solution, vaporizing the nano-filtration permeated solution to obtain recycled inorganic salt, and returning outlet water from vaporization to a production section to be recycled. According to the zero discharging method, an advanced membrane separation technique is introduced into treatment of the vitamin B2 production waste water, the problem of difficulty in treatment of the vitamin B2 production waste water is effectively solved, more importantly, zero discharging of the waste water is really realized, vitamin B2 and the inorganic salt in the waste water are recycled, salty waste water is recycled, final effluent is recycled, and environmental and economic benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a method and device for zero discharge of vitamin B2 waste water. Background technique [0002] Vitamin B2 is widely used in medicine, food additives and feed additives, and with the development of the economy and the expansion of the scope of application, its demand continues to increase. At present, the industrial production of vitamin B2 by microbial fermentation is widely used at home and abroad, and vegetable oil, glucose, molasses or rice are used as the main carbon source in the fermentation medium. Its production wastewater has high concentration of organic matter, high salt content, and poor biodegradability, which is industrial wastewater that is difficult to treat. With the development of the vitamin B2 industry, how to achieve the standard treatment of its production wastewater has become a key issue restricting its development. [0003] At present, th...

Claims

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Application Information

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IPC IPC(8): C02F9/10C07D475/14C01D3/06C02F1/04C02F1/44C02F101/38C02F103/34
CPCC01D3/06C02F9/00C07D475/14C02F1/048C02F1/44C02F1/442C02F2101/38C02F2101/34C02F2301/08
Inventor 石风强尹燕亓庆珺
Owner JIANGSU NINE HEAVEN HIGH TECH
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