Method of extracting soyabean isoflavone and soya bean saponin for soya bean whey waste water

Abstract

A method for extracting soybean isoflavones and soybean saponins from soybean whey wastewater relates to the technical fields of soybean deep processing and wastewater resource utilization. The method is as follows: adjust the pH value of the soybean processing wastewater, centrifuge, pre-filter and micro-filter and other pretreatments; then use resin series adsorption to recover soybean isoflavones and soybean saponins; then separate soybean isoflavones and soybean saponins; and then extract primary soybeans Saponin products; obtain high-purity soybean saponin products. Experiments have proved that the soybean isoflavone and soybean saponin products obtained by using the method can meet market requirements. The process of the present invention is simple, and the required equipments are common devices in the soybean deep processing industry and water treatment industry. The weakly polar macroporous adsorption resin used is also a commercially available product, with low cost, very easy to popularize, beneficial to large-scale production, and has broad application potential. market prospects. Simultaneously, the invention further controls the pollution of soybean whey wastewater, and has remarkable economic, environmental and social benefits.

Description

technical field [0001] The invention relates to the technical field of soybean deep processing and wastewater resource utilization, in particular to a method for extracting soybean isoflavones and soybean saponins from soybean whey wastewater. Background technique [0002] At present, the production of soybean protein isolate in China mainly adopts the traditional alkali-soluble acid precipitation process, which discharges about 40-70m3 per ton of soybean protein isolate. 3 Soy whey wastewater, its COD Cr The general range of 15000 ~ 30000mg / L. In the prior art, most of the treatment of soybean whey wastewater is anaerobic-aerobic biological treatment process. This traditional process can generally remove the COD in soybean whey wastewater. Cr Remove 80-90%. However, the treatment effect of this biological treatment process is unstable, and is often restricted by various objective factors such as wastewater quality and seasonal changes. At the same time, the investment co...

AI Technical Summary

Problems solved by technology

The Chinese patent has published an invention patent of "a process for extracting soybean isoflavones and soybean saponins" with application number 00105542, which introduces the use of high-temperature flash evaporation, electrodialysis and cationic resin exchange in the whey discharged from the production of soybean protein isolate and non-polar macroporous resin adsorption and elution technology to obtain soybean isoflavones and soybean saponins, but this method has the problems of complex process, single material recovery, and high cost

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