Abstract
Wastewater generated from the production of seasoned salty plumes contains very high levels of sugar alcohol, citric acid and sodium chloride with COD, NaCl and pH values of about 120 g/l, 70 g/l and 2－3, respectively. For effective treatment of this concentrated wastewater, a 100－time dilution is typically applied thus requiring a large aeration tank. In this research, a yeast strain (UY7) isolated from a plum-production wastewater treatment plant was shown to effectively cut the TOC component of this high-strength waste. Favorable TOC reductions were achieved with dilutions of only 3 to 10 times prior to biological treatment. The UY7 strain attached readily to the biomass carrier (biofringe) composed of acrylic fiber. In continuous-treatment experiments using a biofringe reactor, with an influent TOC of 14 g/l and a 5－time dilution factor, TOC removals of about 40% were successfully obtained with HRTs of 1.0 to 2.5 days.
