Transformation of rice bran into single-cell protein, extracted protein, soluble and insoluble dietary fiber, and minerals.

Background: It is evident that, during the conversion of agricultural sidestreams into valuable substances, a complete utilization is necessary for economic reasons. The present study investigated the transformation of defatted rice bran into proteins (single cell and extracted protein), soluble and insoluble dietary fiber, and minerals.

Results: In a process chain, starch/glucose was enzymatically extracted and converted into single cell protein (Chlorella sorokiniana).

Disintegration of the agricultural by-product wheat bran under subcritical conditions.

Background: The disintegration of destarched wheat bran in water and sulfuric acid (pH 3) under subcritical conditions (275-300 °C) and at short reaction times (1-4 min) was investigated. A cascade process comprising a stepwise separation of the liquid was applied to reduce the formation of undesired degradation products.

Results: The highest degree of biomass disintegration (67% dry mass solubilization) was achieved by application of a cascade process at 275 °C (pH 3).

Fractionation of a galacto-oligosaccharides solution at low and high temperature using nanofiltration.

Like in many applications, solutions of high sugar content can cause serious problems due to microorganism contaminations. Hence, the main aim of this work was to study a nanofiltration process for GOS purification at 5 °C and 60 °C that may circumvent or reduce potential microbial growth. Process performances and rejection behaviors of monosaccharide as well as individual GOS components were compared.