Potato starch factory waste effluents III. Recovery of organic acids and phosphate

Abstract

The use of anion-exchange resins for removal of acids from potato starch factory waste-water (after prior removal of proteins and amino acids) was studied. Over 99% of the acids were removed by the process. Data are given on the effect of influent temperature and flow-rate on column efficiency during the acid adsorption step. Data are also given on methods of increasing the concentration of acids in the eluate by increasing the alkalinity of the eluting agent or by recycling the eluate. Possible uses for the eluate are discussed.

Retrofit Process Development for Phytate Extraction from Corn-Ethanol Coproducts Using Industrial Anion-Exchange Resins

“…IRA-93 (macroreticular type I strong alkali resin) and IRA-68 (microreticular type I strong alkali resin) were reported on a study targeting the recovery of organic acids and phosphate from potato starch factory wastes. 19 IRA-900 (macroreticular type I strong alkali resin) has been used to extract phosphate from water and wastewater sources. 17 IRA-400 has been evaluated as a substitute for a quicker and easier application of labile, organic, and sorbed P in soil samples.…”

Recovering potato proteins coagulated by steam injection heating

“…The Eastern Center has based its research on the latter alternative, L e , rendering the effluents suitable for discharging by first recovering such valuable components as protein, amino acids, organic acids, and potassium. An ion-exchange process for recovering the potassium, amino acids, and organic acids has been developed at this Center (Heisler et al, 1970(Heisler et al, , 1972Schwartz et al, 1972). When conventional downflow ion-exchange columns are used, for efficient operation the protein concentrations must be lowered to less than 180 ppm or else they will precipitate in the ion-exchange columns.…”

Ultrafiltration and Reverse Osmosis of the Waste Water from Sweet Potato Starch Process

“…Recovery of potato solubles from potato starch production waste water has been studied extensively (Heisler et al, 1959(Heisler et al, , 1962(Heisler et al, , 1972Schwartz et al, 1972;Strolle et al, 1973Strolle et al, , 1980. Reverse osmosis was also investigated for processing potato starch waste effluents Rosenau et al, 1978).…”