Potato wastewater treatment method using a starch-complexing emulsifier
A method comprising treating a potato wastewater stream containing suspended free starch particles with a potato starch-complexing emulsifier to form agglomerated starch particle-emulsifier complexes, and separating the complexes from the remainder of said wastewater stream. Also the separated starch complex suitable for human or animal consumption alone or in combination with other food ingredients. In various embodiments, the products comprise (a) at least about 2000 mg/100 g, BDS, glutamic acid; and/or (b) at least about 2500 mg/100 g, BDS, aspartic acid; and/or (c) at least about 10 g/100 g, BDS, total protein.
1. A method of treating potato wastewater comprising the steps of:
(a) treating a potato wastewater stream containing suspended free starch particles with a potato starch-complexing emulsifier to form starch particle-emulsifier complexes, and
(b) separating at least part of said complexes from the remainder of said wastewater stream.
2. The method of claim 1 wherein said separating is performed by a separation method selected from the group consisting of filtration, density separation, and combinations thereof.
3. The method of claim 1 in which said separated complexes, with or without further treatment, are mixed with a food for human or animal consumption.
4. The method of claim 1 in which said separated complexes, with or without further treatment, are mixed with microbiological growth media.
5. The method of claim 1 in which said emulsifier is selected from the group consisting of monoglycerides, diglycerides, and mixtures and derivatives thereof.
6. The method of claim 1 in which said emulsifier in step (a) comprises at least about 0.1% by weight of the total solids content, BDS, in the potato wastewater stream.
7. The method of claim 1 further comprising stabilizing said separate agglomerates.
8. The method of claim 1 performed in the substantial absence of added enzyme.
9. The method of claim 1 performed in the substantial absence of added hydrocolloid.
10. The method of claim 1 performed in the substantial absence of pH adjustment.