Response surface methodology for optimisation of soluble dietary fibre extraction from sweet potato residue modified by steam explosion

Abstract

Summary To make better use of sweet potato residue (SPR), a new pretreatment method, steam explosion (SE), can increase its content of soluble dietary fibre (SDF). Response surface methodology (RSM) was used to determine the SE variables for optimum SDF yield. The optimal conditions were a steam pressure of 0.35 MPa, a residence time of 121 s and a sieving mesh size 60. Under the optimised conditions, the content of SDF from SPR reached 22.59 ± 0.35%, an increase of 18.78% compared with that (3.81 ± 0.62%) from untreated SPR. The water‐holding capacity, oil‐holding capacity (OHC) and swelling capacity of SDF were improved by SE. Scanning electron micrograph (SEM) images demonstrated that SDF had become poriferous, loose and dilatants after SE treatment. This technology provides an efficient process for increasing the industrial production of SDF from SPR.

Impact of processing parameters on physicochemical properties and biological activities of Qingke (highland hull‐less barley) treated by steam explosion

“…Steam explosion (SE) is a technique in which superheated steam pressure accumulates in a grain with heat and is released instantly, causing the matrix and porous structure to expand (Wang et al., 2017). With the sudden release of pressure, the medium and internal steam release many shock waves that cause the cell walls of the grain to break down and the nutrients inside the cells to be released (Li et al., 2019; Nader, Afif, & Louka, 2017).…”

“…Steam explosion (SE) is a technique in which superheated steam pressure accumulates in a grain with heat and is released instantly, causing the matrix and porous structure to expand (Wang et al, 2017).…”

Solvent extraction and in vitro simulated gastrointestinal digestion of phenolic compounds from purple sweet potato

“…Most studies on purple‐fleshed potatoes focus on the extraction of anthocyanin that has high antioxidant activity and good pigment stability because of its acylated form (Cai et al ., ; Zhang et al ., ).Wang et al . () use response surface methodology (RSM) to determine the steam explosion variables for optimum soluble dietary fibre yield. Under the optimised conditions, the content of soluble dietary fibre increased by 18.78% compared with that from untreated sweet potato residue.…”

Hydrodistillation condition adjustment for different material particle sizes: a method to increase batch‐to‐batch quality consistency

“…The smaller the mesh was, the larger the particle size that was obtained (Chen et al, 2017;Wang et al, 2017). The smaller the mesh was, the larger the particle size that was obtained (Chen et al, 2017;Wang et al, 2017).…”

“…As the plant materials of different particle sizes were separated by mesh sieves, the unit of 'average mesh' was used to denote the particle size. The smaller the mesh was, the larger the particle size that was obtained (Chen et al, 2017;Wang et al, 2017). Specifically, large particles passed through an eight-mesh sieve and retained on a twelve-mesh sieve (1400-2360 lm) were denoted by 10 average mesh size.…”