Application of white grape pomace in the brewing technology and its impact on the concentration of esters and alcohols, physicochemical parameteres and antioxidative properties of the beer
Alan Gasiński, Joanna Kawa‐Rygielska, Dawid Mikulski, Grzegorz Kłosowski, Adam Głowacki
Food Chemistry
Abstract
Main by-product of white wine production is white grape pomace (WGP). It has attracted attention of food scientists, because it possesses high concentration of nutrients and bioactive substances. In this study, WGP was added to the beer after primary fermentation in two different concentrations (10% w/w and 20% w/w) and two different pretreatments (pasteurised and unpasteurised) to determine, whether the most abundant waste from white wine industry could be used to modify the volatilome and phenolic content of the beer. The addition of white grape pomace increased the concentration of phenolic compounds in all of the tested beers (from 321.584 mg gallic acid equivalent (GAE)/dm<sup>3</sup> to 501.459 mg GAE/dm<sup>3</sup>). Antioxidant activity of the beers with addition of WGP (tested with the ABTS<sup>+•</sup>, DPPH<sup>•</sup> and FRAP assays) also increased. The composition of volatiles in beers changed as WGP was added. The most significant difference was in the concentration of acetaldehyde - beers with WGP added had 4-7 times lower acetaldehyde content (17.425-31.425 mg/dm<sup>3</sup>) than the control sample (134.050 mg/dm<sup>3</sup>).
Extracted Claims
3 claims extracted from this paper into the knowledge graph
WGP increased antioxidant activity of the beers
“Antioxidant activity of the beers with addition of WGP (tested with the ABTS⁺•, DPPH• and FRAP assays) also increased.”
white grape pomace (WGP) increased concentration of phenolic compounds in beers
“The addition of white grape pomace increased the concentration of phenolic compounds in all of the tested beers (from 321.584 mg gallic acid equivalent (GAE)/dm³ to 501.459 mg GAE/dm³).”
WGP decreased concentration of acetaldehyde in beers
“The most significant difference was in the concentration of acetaldehyde - beers with WGP added had 4-7 times lower acetaldehyde content (17.425-31.425 mg/dm³) than the control sample (134.050 mg/dm³)...”