Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Food or edible as carrier for pharmaceutical
Patent
1996-05-31
1998-06-02
Page, Thurman K.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Food or edible as carrier for pharmaceutical
424439, A23K 1165
Patent
active
057595682
ABSTRACT:
An improved method for recovering and processing waste water solids into animal foodstuff wherein bentonite is added to waste water comprising oils, fatty acids, grease, or the like. The pH of the waste water is regulated, bentonite and a polymer are added, and the treated waste water is transferred into an air flotation device. A float blanket containing solids and water forms readily and is removed and transferred to a drying apparatus. The float material, or sludge, typically contains between 2-10% solids and is ready to be introduced into the drying apparatus without further modification. However, the sludge is usually belt compressed to obtain a solids concentration between 20-40% to assist in handling and drying. The drying apparatus employed contains two zones. In the first zone, air enters the dryer at a very high temperature where it encounters the sludge also being introduced. As the sludge comes into contact wth the hot air, it is flash dried. The first zone exposes the sludge to intense agitation to break up lumps and agglomerates in the sludge and facilitate the flash drying. The majority of the moisture is evaporated in the first zone. As the material proceeds through the second zone, secondary drying takes place through product retention time. The amount of agitation in the first zone and the length of time in either zone can be adjusted to meet the desired consistency of the end product. After drying is complete, the material is ready for use as animal foodstuff.
REFERENCES:
patent: 4282256 (1981-08-01), Evich et al.
patent: 5204007 (1993-04-01), Mosley et al.
Brochure for Scott A.S.T. Dryer.
Amcol International Corporation
Page Thurman K.
Shelborne Kathryne E.
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