Preparation of Rice Bran Protein (RBP) Powder Using Spray Drying Method at the Optimal Condition and Its Protein Quality

Abstract

Rice bran is a by-product of the rice milling process. It contains a high concentration of protein. Rice brans are frequently utilized as feed cattle, fertilizer, and fuel. However, their application as human nutrition supplements is uncommon, and the necessary process for this purpose is yet to be established, including the drying process. This study aims to evaluate the effect of the spray-drying parameters, the inlet temperature, inlet flowrate, and inlet air flowrate, on rice bran protein (RBP) powder and optimize it using response surface methodology (RSM). A thermal water-based extraction method was utilized prior to the drying process. The correlation between the spray-drying parameters, i.e., the inlet temperature (120 to 210 °C), feed flowrate (5 to 55%), and air flowrate (246 to 670 L/h), and the RBP yield were investigated. The quality of the RBP powder was evaluated based on acid amino profiling in the mixture through de novo peptide sequencing. The optimized operating conditions for the maximum yield of RBP powder (25.7 g RBP/100 g RRB) are 178 °C, feed flowrate of 25%, and air flowrate of 450 L/h. The main peptides that contribute to RBP powder protein are globulin and glutelin; meanwhile, prolamin is believed to degrade during the drying process. The process also produced protein sugar, helping to produce fine particles powder without the drying agent.

Growth Revival of Grey Oyster (Pleurotus Pulmonarius) Powder Culture Mushroom From the Effect of Spray Drying Temperature

“…However, the success of the drying process will later be determined by the revival and growth ability of the powder culture. Similar results were obtained by Mansor et al as they found that at low temperature, the particle size was higher due to the low evaporation process [19]. Low evaporation will cause high-density membranes, high water content, poor fluidity, and agglomeration of the particles.…”

A Three-Level Factorial Model for Maximising Protein Extraction from Rice Bran with Choline Chloride: Glycerol

“…Rice bran was procured from Kilang Beras BERNAS Sdn Bhd in Kuala Perlis, Perlis. To inhibit hydrolytic rancidity, the unprocessed rice bran underwent a 3-minute heating process, following the method described by Mansor et al, [19]. Subsequently, it was kept at a temperature of 4˚C until the commencement of the experimental process.…”