Treatment of fat and protein contg. waste water - by addition of a phosphate and calcium cpd. to precipitate and flocculate material suitable for animal feeds

摘要

Process comprises(a) dissolving a phosphate in the waste water or addn. of a phosphate soln, (b) adding a calcium cpd. (usually chalk) to the waste water and/or modifying the pH to ppte. calcium phosphate and flocculate the organic material in the waste water, (c) sepg. the flocculated material from the water. Fats, proteins an carbohydrates recovered from waste water, esp. water from food factories, are used as animal feedstuff. Normaly such waste water is treated by biological oxidn.