Preparation of white mustard protein powder and method for treating anionic dye wastewater

Abstract

The invention discloses a method for preparing semen brassicae albumen powder and treating anionic dye wastewater with the semen brassicae albumen powder. The method comprises the following steps: smashing semen brassicae into powder; mixing the semen brassicae powder with an ammonium sulfate solution, and extracting protein through low temperature ultrasonic treatment or room temperature stirring; filtering the mixed solution; extracting protein from filter residues for multiple times; mixing filtrates obtained by the multiple extractions, continuously adding ammonium sulfate powder, and stirring the solution; centrifugating the mixed solution; collecting precipitates, and carrying out dialysis treatment; putting dialysate into an opened flat-bottom container for low temperature vacuum drying; after the drying is completed, obtaining light yellow crystals which are the dry semen brassicae albumen powder; preparing the albumen powder into an active protein solution, adding the active protein solution into the to-be-treated anionic dye wastewater, stirring and then settling, thus removing anionic dyes from the water. The method has the advantages of simplicity of preparation of the active semen brassicae albumen powder, simple equipment, convenience for operation and the like; the prepared active semen brassicae albumen powder provides a new way for removing certain types of anionic dyes from the water.

Description

technical field [0001] The invention belongs to the technical field of environmental protection water treatment, and in particular relates to the preparation of white mustard protein powder and its method for treating anionic dye wastewater. Background technique [0002] China is a major textile producer. According to statistics, its textile fiber output accounted for 2 / 3 of the world's total in 2012. In order to meet the needs of textile production, my country produces a large amount of dyes every year. At present, China is already the largest dyestuff producer in the world. According to statistics, in 2013, the national annual output of commercial dyes was 8.95 × 10 5 tons, accounting for 65% of global annual production. [0003] During use, about 30% of dyes are discharged with wastewater. According to the statistics of the World Bank, the discharge of printing and dyeing wastewater accounts for 17%-20% of the world's industrial wastewater discharge. In 2013, the disc...

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Problems solved by technology

However, the raw materials of coagulants used for wastewater treatment are mostly industrial waste, which itself contains heavy metal ions, and its residues are likely to cause secondary pollution. At the same time, the residual aluminum ions are also harmful to the human body.

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