The Effects of Soaking and Autoclaving on Chemical and Nutritional Composition of the Horse Chestnut (Aesculus hippocastanum) Seed

Konca Y., Büyükkılıç Beyzi S.

European Journal of Science and Technology, vol.19, pp.757-762, 2020 (Peer-Reviewed Journal)


The aim of this study is to determine the nutrient composition of the horse chestnut (Aesculus hippocastanum) seed and to determine the differences of these nutrients with some technological processes. For this purpose, the horse chestnut seed was divided into 3 groups as 1) raw, 2) soaking in cold water for 24 hours and 3) autoclaving at 121 °C for 60 minutes. The obtained groups were then analyzed under two groups as shelled and unshelled. The obtained data were analyzed in general linear model (GLM). As a result, the effect of the treatments applied on horse chestnut seed on dry matter (DM), crude protein (CP), Ether extract (EE), crude ash (CA), cellulose fractions and metabolic energy values were insignificant, while the tannin ratio decreased significantly in the autoclaved group. When horse chestnut seeds are compared with shell and without shell; while the content of DM, CP, EE and CA did not change, the starch content increased, acid detergent fiber, neutral detergent fiber and hemicellulose contents decreased in the shell less horse chestnut seed. The tannin ratio was significantly lower in the shelled horse chestnut. In addition, as a result of mineral analysis of raw horse chestnut, P, K, Ca, Na, Cl, Si, Al, Ni, Cr, Rb, Zn, Fe, Mg and S contents were; 0.257%, 1.106%, 0.27%, 0.146%, 0.061%, 0.055%, 0.023%, 0.016%, 0.005%, 0.003%, 0.006%, 0.08%, 0.056% and 0.117%, respectively. The technological processes applied were effective in reducing the tannins content, or can be used without shell for the purpose of reducing the tannins content.