Drying of Soy Pulp (Okara) in a Bed of Inert Particles

Optimization of air jet impingement drying of okara using response surface methodology

“…Okara is rich in proteins, lipids and dietary fibers, and could be used as ingredient for animal feed and human food (Surel & Couplet, 2005). However, fresh okara deteriorates rapidly owing to the high moisture (75e80%) and protein contents (29% on the dry basis) (Taruna & Jindal, 2002;Wachiraphansakul & Devahastin, 2005). Drying okara to low moisture content while retaining its functional quality is essential for long-term storage and value-added applications.…”

Drying kinetics and quality of okara dried in a jet spouted bed of sorbent particles

“…Okara is usually available in a semisolid form, which gives an appearance of a clumpy mass in absence of excessive moisture. Typically, it has around 75-80% moisture content and contains approximately 60% of fiber, 29% of protein and 11% of fat on a dry basis (Taruna & Jindal, 2002;Wachiraphansakul & Devahastin, 2005). In addition, the okara protein is generally of higher quality than that obtained from other soy products both in terms of the protein efficiency ratio and the essential amino acid to total amino acid ratio (O'Toole, 1999).…”

“…Although a number of papers are available that report the results of soybean drying, much smaller pool of information is available on okara drying. Taruna and Jindal (2002) investigated the use of a continuous vortex-like moving bed of inert particles to dry okara. Although this drying technique gave acceptable results both in terms of the drying kinetics and energy consumption, the process suffered the fact that okara agglomerated when high feed rate of okara was used.…”

Effect of apparent viscosity on fluidized bed drying process parameters of guava pulp

“…They obtained that the maximum feed rate, volumetric heat transfer coefficient and thermal efficiency of the vibrated fluidized bed of inert particles were all higher than those of the conventional fluidized bed with the same inert particles (Teflon pellets). Taruna and Jindal (2002) investigated the effects of the experimental variables such as inlet air temperatures, airflow and feed rates, and mass of inert particles (Teflon pel- lets) on the dryer performance of soy pulp product. Results shown that all the operating conditions cited below could affect the dryer performance.…”