Abstract: This study aimed to establish the process route of zero-discharge of distiller grains in liquor. Through the investigations of extraction parameters of distiller grains with alcohol,recovery process parameters of phytin and enrichment conditions of nutritional components,the zero-discharge route of distiller grains in liquor is determined as follows:firstly,extracting distiller grains with edible alcohol and filtrating the deposit for obtaining the nutrients;secondly,extracting distiller grains with acid solution and then adjusting pH value to collect the phytin deposit and purified rice husk as well;and lastly,distilling the extracted alcohol to produce the distiller grains liquor. By this way,the spent grains are made the best use,and zero-discharge is achieved.

Key words: spent grains, phytin, zero-discharge, extraction, distiller grains liquor