الفهرس | Only 14 pages are availabe for public view |
Abstract Edible films and coatings play an important role in the quality, safety, transportation, storage and display of wide range of fresh and processed foods. They can diminish main alteration by avoiding moisture losses and decreasing adverse chemical reaction rates. Also, they can prevent spoilage and microbial contamination of foods. Additionally ,Scaling up of manufacturing of edible coatings for food, Determining optimum conditions based on piping and pumping system was made necessary to handle a given flow, fluid density and viscosity ,cost of electricity and efficiency of pump as pumping cost. Rheological behavior and thixotropic effect was determined for carrageenan and CMC solutions. The measurements revealed that scaling up mixing is based upon constant power /volume, equal blend duration, and adjusting the impeller/tank (D/T) diameter ratio was possible. A four –blade impeller was utilized to homogenize 1%carrageenan solutions at 70 . Also, mixing parameters (Power number, Blend number and Pumping number) were determined at different D/T ratios. Cost- effective pipe diameter and optimum pipe diameter per unit length were also determined. |