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US 2020/0236964 A1Published application
Method for collecting proteins from washwater and/or wastewater
AssigneeMPF, Inc.
InventorsStanley H. Hultin, Hordur G. Kristinsson, Alex Riemann
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Abstract
A method of collecting proteins from a washwater and/or wastewater stream by means of a pH shift technique, aided with dissolved bubbles of air or gases, in order to substantially reduce the environmental impact of wastewater discharge and improve the value of the recovered protein. The pH shift process can coagulate and recover the protein at low temperatures (−1 to 10 degrees Celsius) making the proteins recovered suitable for human food applications, without heating.
Claims23
A method for collecting proteins from washwater and/or wastewater comprising the steps of:
- initially lowering or raising the pH of a slurry containing coagulated proteins, wherein the proteins are dissolved and/or structurally modified by the initial lowering or raising of the pH;
- subsequently lowering or raising the pH of the protein-containing slurry at or near an isoelectric point of the proteins, wherein the proteins are re-coagulated by the subsequent lowering or raising of the pH;
- incorporating bubbles into the protein-containing slurry, wherein incorporating the bubbles into the slurry enhances the re-coagulation of the proteins, forming a protein-rich layer at a surface of the slurry;
- and
- collecting the protein-rich layer.
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Dependencies are inferred from the claim text.