Abstract:In this paper, high-concentration yeast wastewater was treated by ultrafiltration membrane separation method, and the changes of organic compounds in wastewater and its effects on the water quality characteristics were investigated. The results showed that the organic compounds in the wastewater were complex, mainly including phenols, alcohols, ketones, liquids and so on. The main organic compounds with relative contents of more than 5.00% were 3,4-dimethoxyphenol, phenyl ethanol, 3,4,5-trimethoxyphenol, phenol, 2,5-dimethoxy-1,4-hydroquinone and diamyl phthalate accounting for 69.81% of total organic matter content, while the highest content of phenolic compounds accounted for 58.44%. In addition, ultrafiltration membrane could effectively remove a lot of organic compounds in yeast wastewater from yeast wastewater, such as phenol, phenyl alcohol, 3,4-dimethoxyphenol and 3,4,5-trimethoxyphenol. And some caramel pigments can be recycled. Hence, by using membrane ultrafiltration, theutilization and biodegradability of yeast wastewater can be significantly improved. This research provided a new way for the efficient treatment of high-concentration yeast wastewater.
