Method and device for treating tofu brine by adopting frequent electrodialysis reversal technology

Abstract

The invention belongs to the technical field of water treatment and relates to a method and device for treating tofu brine by adopting a frequent electrodialysis reversal technology. The frequent electrodialysis reversal technology is adopted, and a fluorine-containing alloy ion exchange membrane with high polymerization cross-linking degree and high resistance to organic pollution is utilized to realize the separation of active nutrients and bittern in medium brine. The method comprises the steps of raw water pretreatment, electrodialysis and bittern concentration; the frequent electrodialysis reversal technology is adopted for treating and removing the brine of insoluble components according to desalted fluid discharge standards that the magnesium ion concentration is reduced to 100 mg / L and the chloride ion concentration is reduced to 235 mg / L. According to a concentrated liquid discharge standard that the concentration of the brine in a concentrated liquid circulation tank reaches 12%, the desalted brine and the low-concentration bittern are separately obtained; the low-concentration bittern is dewatered and concentrated to the bittern adding process concentration. At the same time, the dedicated treating device is also provided. According to the method for treating the tofu brine by adopting the frequent electrodialysis reversal technology, the technology is simple and easy to control, and zero discharge of sewage is realized while recycling of available resources is realized. The method and the device are suitable for the bean product processing industry.

Description

technical field [0001] The invention belongs to the technical field of water treatment, relates to industrial wastewater treatment technology, in particular to the separation and recycling technology of bean curd brine. Background technique [0002] As the most typical representative of traditional food in my country, tofu plays an important role in people's daily diet. It has a history of more than 2,000 years of production and consumption. [0003] Tofu is loved by the public because of its delicious taste and high nutritional value. It has the characteristics of high protein, low calorie, easy digestion and absorption. The nutrients in tofu include 40% protein, 20% fat, 10% water, 5% cellulose, and 5% minerals. In addition, it also contains a variety of physiologically active ingredients, such as soybean peptides, soybean isoflavones, etc. Tofu contains iron, calcium, phosphorus, magnesium and other trace elements necessary for the human body, as well as sugars, vegetab...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of the loss of nutrients in the tofu caused by the bean curd pulping process and the difficulty in the treatment of the tofu brine in the subsequent process, to provide a treatment method for the tofu brine, and to provide a special equipment solution at the same time

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