Method for extracting plant protein from cassava starch waste water

Abstract

The invention discloses a method for extracting plant protein from cassava starch waste water, wherein starch-containing yellow serofluid waste water discharged in a process for producing starch by utilizing cassava is fully utilized. The method is characterized by comprising the following steps of: 1, introducing the yellow serofluid waste water into a reaction sedimentation tank by virtue of a premixing groove, metering and throwing protein precipitant and lime water into the premixing groove, controlling alkalinity of water in a pond and controlling settling time to be 1-2 hours, so as to produce precipitate; 2, introducing the precipitate into a stirring pond, adding ferrous-iron-containing salt and uniformly stirring to obtain dissolved matter; 3, pumping by virtue of a pump to convey the dissolved matter into a pressure filter to be subjected to filter pressing, so as to obtain filter residue; and 4, baking the filter residue and smashing the filter residue into powder, and packaging to obtain finished products. The method disclosed by the invention has low cost and simple process, reaction of protein to certain medicine is utilized, the plant protein is condensed and separated under the condition of slight alkalinity, the added drug and the protein are condensed into a whole and precipitated, the products are recycled by virtue of a machine, water is discharged and no drug residue is left, pollutant is greatly reduced, and follow-up biochemical treatment can be beneficially carried out.

Description

technical field [0001] The invention relates to a method for extracting protein from plants, especially a method for extracting protein from cassava. Background technique [0002] At present, in the process of producing starch from cassava, yellow pulp wastewater will be discharged. The main components of the yellow pulp wastewater are: plant protein, yellow pulp, residual starch, etc., which are discharged outside and cause environmental pollution. The treatment of yellow pulp wastewater has been a major problem for many years and has not been cured. Due to the high concentration of yellow pulp wastewater, the plant protein in it is easy to oxidize and deteriorate, resulting in poor water quality and increasing the difficulty of treatment. [0003] During the starch beating process of cassava production, the protein in cassava is soluble in water and cannot be separated from starch by centrifugation, and becomes high-concentration wastewater discharged from the production ...

AI Technical Summary

Problems solved by technology

[0009] According to foreign technical data on extracting protein from plants, this technology uses the inorganic salt saturation method, that is, adding inorganic salt to the waste water, and the protein condenses after reaching saturation. This method is costly and the concentration of the waste water after extraction is high. Additional treatment is required to remove the added inorganic salts

The process is more complicated