title: Treatment with activated carbon and other adsorbents as an effective method for the removal of volatile compounds in agricultural distillates.
abstract: This study investigates the effect of treatment with activated carbon and other adsorbents on the chemical composition and organoleptics of a barley malt-based agricultural distillate. Contact with activated carbon is one of the methods by which the quality of raw distillates and spirit beverages can be improved. Samples placed in contact with 1 g activated carbon (SpiritFerm) per 100 ml distillate with ethanol content of 50% v/v for 1 h showed the largest reductions in the concentrations of most volatile compounds (aldehydes, alcohols, esters). Increasing the dose of adsorbent to over 1 g 100 ml-1did not improve the purity of the agricultural distillate significantly. Of the tested compounds, acetaldehyde and methanol showed the lowest adsorption on activated carbon. The lowest concentrations of these congeners (expressed in mg l-1alcohol 100% v/v) were measured in solutions with ethanol contents of 70-80% v/v, while solutions with an alcoholic strength by volume of 40% did not show statistically significant decreases in these compounds in relation the control sample. The reductions in volatile compounds were compared with those for other adsorbents based on silica or activated carbon and silica. An interesting alternative to activated carbon was found to be an adsorbent prepared from activated carbon and silica (Spiricol). Treatment with this adsorbent produced distillate with the lowest concentrations of acetaldehyde and isovaleraldehyde, and led to the greatest improvement in its organoleptics.
authors.affiliation: a Department of Spirit and Yeast Technology, Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences , Lodz University of Technology , Lodz , Poland.
authors.forename: Maria
authors.initials: M
authors.lastname: Balcerek
authors.affiliation: a Department of Spirit and Yeast Technology, Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences , Lodz University of Technology , Lodz , Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Pielech-Przybylska
authors.affiliation: a Department of Spirit and Yeast Technology, Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences , Lodz University of Technology , Lodz , Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Patelski
authors.affiliation: a Department of Spirit and Yeast Technology, Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences , Lodz University of Technology , Lodz , Poland.
authors.forename: Urszula
authors.initials: U
authors.lastname: Dziekońska-Kubczak
authors.affiliation: a Department of Spirit and Yeast Technology, Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences , Lodz University of Technology , Lodz , Poland.
authors.forename: Tomaš
authors.initials: T
authors.lastname: Jusel
mesh_terms: D000327:Adsorption; D000434:Alcoholic Beverages / Q000032:analysis*; D002244:Carbon / Q000737:chemistry*; D018556:Crops, Agricultural / Q000737:chemistry*; D057168:Distillation; D001467:Hordeum / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000302:isolation & purification*
chemical_list: D055549:Volatile Organic Compounds; D002244:Carbon; D012822:Silicon Dioxide
keywords: Agricultural distillate; activated carbon; adsorption; aldehydes; esters; higher alcohols; methanol; silica; volatile byproducts