Preparation of distilled spent grains- activated carbon and its adsorption of flavour compounds in low-alcohol liquor

• 1、School of Biotechnology,Jiangnan University,Wuxi 214122

Abstract：Distilled spent grains (DSG) is a major by-product of liquor (baijiu)-making production. This study prepared DSG into activated carbon to increase its added value. Textural properties of AC samples were determined from N2 adsorption-desorption isotherms at 77 K by using a Micromeritics 3Flex analyzer. The effects of activated carbon preparation methods on adsorption performance were compared and applied to low alcohol liquor, and the removal of flavour compounds was analysed using solid phase microextraction combined with GC-MS. It was shown thatPreparation of distilled spent grains- activated carbon and its adsorption of flavour compounds in low-alcohol liquor the preparation of activated carbon by dry heat method was superior to hydrothermal reaction, and the specific surface area and micropore volume of AC prepared under optimum conditions are 1317 m2/g and 0.49 cm3/g, respectively. In low-alcohol liquor, activated carbon has obvious adsorption of naphthalene and ester substances, especially the adsorption of advanced fatty acid esters. The removal rate reaches 70%, and the turbidity removal effect is excellent. It has important guiding significance for the preparation of DSG-based activated carbon and the specific adsorption of compounds in Baijiu.

Keywords： environmental engineering distilled spent grains activated carbon low-alcohol liquor adsorption