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Recovery of Lysine from Corn Steepwater
Author(s) -
O'Brien Dennis J.,
Craig James C.
Publication year - 1999
Publication title -
cereal chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.558
H-Index - 100
eISSN - 1943-3638
pISSN - 0009-0352
DOI - 10.1094/cchem.1999.76.6.949
Subject(s) - lysine , chemistry , ion exchange resin , yield (engineering) , food science , potassium , fractionation , by product , ion exchange , arginine , chromatography , amino acid , biochemistry , ion , organic chemistry , materials science , metallurgy
One approach to increasing the utilization of agricultural products is fractionation of low‐value materials to yield high‐value products. In this study, lysine recovery from corn steepwater, an internal processing stream generated in the wet‐milling of corn, was investigated. A weakly acidic cation exchange resin was employed to selectively recover lysine from corn steepwater at pH 7.0. In column studies, the product from the ion exchange operation had a lysine content of 4–6% (db). The only other amino acid in the product was arginine. The presence of sodium, potassium, and magnesium ions at significant concentrations in the steepwater limited the lysine content of the product because of competitive adsorption on the resin. The lysine‐enriched product reported here is 4–10 times higher in lysine content than other corn milling coproducts and could potentially be useful as a lysine supplement in animal feeds.