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

An electrodialysis process and frequent electrode reversal technology are applied in the field of industrial wastewater treatment, separation and recycling of tofu brine, which can solve the problems of tofu nutrient loss and tofu brine treatment difficulties, achieve smooth taste and improve raw material utilization , The effect of simple process

Inactive Publication Date: 2019-09-17
QINGDAO UNIV OF SCI & TECH
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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 t

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

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Embodiment Construction

[0033] In order to make the method for treating tofu brine disclosed by the present invention simpler and easier to understand, the operation process and specific parameters of the method will be further described in conjunction with specific examples. The protection scope of the present invention is not limited thereto.

[0034] The equipment composition includes: one automatic frequent electrode reversal electrodialyzer, equipped with 1.5m 3 Two storage tanks; one cooling device; one bag filter with a filtration accuracy of 5μm and a flange diameter of 40m, and the maximum flow rate of a single machine is 5 / d;

[0035] One XINPAI-ZFQ89 multi-effect evaporator; the upper and lower sides are respectively equipped with 5m of inlet and outlet 3 One storage tank for deslagging raw water turnover; one Leici PHS-25 ph meter; one Leici DDSJ-308F conductivity meter; stop valve, JQ-LLJ flowmeter; Ouwei YN-Y100 pressure gauge; MP-F-255SCV5 magnetic drive pump, equipment structure and...

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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...

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Application Information

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IPC IPC(8): A23L5/20
CPCA23L5/20
Inventor 李少香王栋雷芸娜崔跃飞刘猛程家骥曲文娟
Owner QINGDAO UNIV OF SCI & TECH
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