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Obtaining a protein concentrate from integral defatted sunflower flour
C Ordóñez1, M G Asenjo, C Benitez
1Departamento de Química Agrícola y Edafología, Facultad de Ciencias, Universidad de Córdoba, Spain. qe2ormoc@uco.es
Bioresource Technology
|May 3, 2001
Summary
Defatted sunflower flour proteins were concentrated using pH-based extraction and precipitation. This process yields a protein concentrate rich in amino acids and a nutrient-rich liquid byproduct suitable for agricultural fertilizer.
Area of Science:
- Food Science
- Agricultural Science
Background:
- Sunflower flour is a significant source of protein.
- Current methods for protein extraction from plant sources require optimization.
Purpose of the Study:
- To develop an efficient method for producing protein concentrate from defatted sunflower flour.
- To characterize the resulting protein concentrate and byproducts.
Main Methods:
- Proteins were extracted from defatted sunflower flour using a basic pH solution.
- Proteins were precipitated using an acid pH solution.
- Optimal pH and temperature conditions were determined for extraction and precipitation.
Main Results:
- A solid protein concentrate was obtained with 71% protein content (dry weight).
- The concentrate was rich in glutamic and aspartic acids.
- A liquid supernatant byproduct was recovered, rich in phosphorus and potassium.
Conclusions:
- An effective method for sunflower protein concentrate production was established.
- The protein concentrate is a valuable source of amino acids.
- The liquid byproduct has potential as a phosphorus and potassium-rich agricultural fertilizer.