title: Treatment of fish-processing wastewater by co-culture of Candida rugopelliculosa and Brachionus plicatilis.
abstract: This research was conducted as a part of the continuous development of a novel technique for managing fish-processing wastewater by cultivating proteolytic yeast, Candida rugopelliculosa, as possible diet of the rotifer, Brachionus plicatilis. It was feasible to use Alaska Pollack processing wastewater as a growth medium for C. rugopelliculosa, which was stimulatory for growth of the rotifer by 18.3% over the commercial diet of Saccharomyces cerevisiae. Maximum growth of C. rugopelliculosa and reduction of influent soluble chemical oxygen demand (SCOD) concentration were respectively (6.09+/-0.04)x10(6) cells/ml and 70.0% at 6.3h hydraulic retention time (HRT). Method of 4th order Runge-Kutta approximation was successfully applied to determine the Monod kinetics of C. rugopelliculosa by using unsteady state data from only one continuous unsteady state operation at a fixed HRT. The maximum microbial growth rates, mu(max), and half saturation coefficient, K(s), were determined to be 0.82+/-0.22 h(-1) and 690+/-220 mg SCOD/L, respectively. The microbial yield coefficient, Y, and microbial decay rate coefficient, k(d), were determined to be (1.39+/-0.22)x10(4) cells/mg SCOD and 0.06+/-0.01 h(-1), respectively.
authors.affiliation: School of Environmental Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Kyungbuk 790-784, South Korea.
authors.forename: Joontaek
authors.initials: J
authors.lastname: Lim
authors.forename: Taeyun
authors.initials: T
authors.lastname: Kim
authors.forename: Seokhwan
authors.initials: S
authors.lastname: Hwang
mesh_terms: D000818:Animals; D019149:Bioreactors; D002175:Candida / Q000502:physiology*; D005399:Fishes; D019649:Food Industry; D007220:Industrial Waste; D007700:Kinetics; D012403:Rotifera / Q000502:physiology*; D017747:Seafood; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D007220:Industrial Waste