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Monosodium glutamate plant to corn as raw material to produce monosodium glutamate, each production of one ton of monosodium glutamate about 15 tons of water. Water demand is large, the amount of waste water is also large, the wastewater contains high concentration of organic matter, mainly containing protein, fat, cellulose, such waste water can be processed after the extraction of protein, nutrient-rich protein feed.

   Protein waste water extraction protein is generally used in air floatation. Protein is the electrolyte, the pH of the starch wastewater is just the isoelectric point of the protein. The protein in the starch wastewater has the tendency of automatic cohesion, but the flocculation is small and the structure is unstable. The protein wastewater is extracted by the flotation method , The first addition of electrodeless flocculant (poly aluminum chloride, the general dissolved concentration of 5% - 10%) and the charge on the floc, polyacrylamide can do soil moisture, so that the formation of larger flocs, And then adding the polymer flocculant (polyacrylamide, the general dissolved concentration of 1 ‰) and the charge on the floc, so that the interaction between the flocs through the adsorption bridge to form a large stable floc, and then add the air, floc Bubble buoyancy under the action of the upper layer of waste water, scrape off the scraper, into the mud cake filter, drying, flocculation precipitation with anionic polyacrylamide, the protein can be processed feed, the experiment proved that the extraction of protein processing is very High economic value. On the one hand to create the value, on the one hand to protect the environment, do both.