Process method for preparing calcium phytate and calcium lactate by using corn soaking water

Abstract

The invention relates to the technical field of corn soaking water treatment, in particular to a process method for preparing calcium phytate and calcium lactate by using corn soaking water, which comprises the following steps: (1) settling the corn soaking water to obtain supernate, enabling the supernate to enter an anion resin column, collecting first effluent, enabling the first effluent to enter the anion resin column by using hydrochloric acid as a desorption agent, and collecting a desorption solution; (2) after the first effluent in the step (1) is filtered by a nanofiltration membrane, respectively collecting trapped fluid and permeate; (3) enabling the permeate collected in the step (2) to enter a weakly alkaline anion resin column, collecting a second effluent, enabling a calcium chloride solution as a desorption agent to enter the weakly alkaline anion resin column, and collecting a desorption solution; and (4) drying the trapped fluid in the step (2), and concentrating the second effluent collected in the step (3). According to the process method, the corn soaking water is effectively treated, the calcium phytate and the calcium lactate are obtained, and the discharge of wastewater is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of corn soaking water treatment, in particular to a process for preparing calcium phytate and calcium lactate from corn soaking water. Background technique [0002] L-Calcium Lactate is widely used in food and pharmaceutical industries, and is a good source of calcium. The current production of calcium lactate belongs to one of the series derivatives of lactic acid production. The production methods of lactic acid mainly include fermentation, synthesis and enzymatic methods. The fermentation method has complex nutritional requirements and strict aseptic operation, which brings inconvenience to actual production; the chemical synthesis method uses acetaldehyde and highly toxic substances as the raw materials. The production of hydrocyanic acid is greatly restricted, and the production cost is high; the enzymatic process is complicated, and further research and breakthroughs are still needed for its applicati...

AI Technical Summary

Problems solved by technology

Although the existing process can obtain phytic acid, protein, lactic acid and other products after the corn soaking water is treated, the existing process will produce a large amount of waste water, which mainly comes from two parts: (1) after the corn soaking water settles The phytic acid is adsorbed by the anion resin column, and the collected effluent is desorbed with hydrochloric acid, and the collected effluent is neutralized with lime water and filtered with a plate and frame to obtain calcium phytate and a large amount of waste water; (2) the corn effluent after the resin column absorbs phytic acid Calcium salt is added to the permeate after nanofiltration membrane filtration, calcium lactate is obtained by adding calcium salt, or calcium lactate is obtained after resin adsorption, desorption, and neutralization, but the above operations will generate waste water; therefore, for the above problems, there are It is necessary to establish a process for preparing calcium phytate and calcium lactate by using corn soaking water

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