Removal of metal-complex dye with Candida tropicalis from aqueous solutions : Growth and inhibition kinetics


OKUR M., SARAÇOĞLU N., AKSU Z.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, vol.35, no.3, pp.1399-1408, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 3
  • Publication Date: 2020
  • Doi Number: 10.17341/gazimmfd.467099
  • Title of Journal : JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Page Numbers: pp.1399-1408

Abstract

In this study Candida tropicalis was used to removal of the Acid Violet 90 Cr-complex dye from aqueous solutions. The effect of initial pH (3-6), reducing sugar (1-20 g/L)and dye concentrations (20-400 mg/L) on dye removal was examined. The highest bioaccumulations were obtained as 50.3% at 50 mg/L initial dye concentration at pH 5.0. Monod saturation constant (K-S) and maximum specific growth rate (mu(m)) obtained in the control medium containing no dye were found as 1.21 mg/L and 0.267 1/h. The linear mixed-type inhibition model was used to describe the inhibition of AV90 dye on the growth of C. tropicalis. The inhibition constant (K-I) of AV90 was determined as 1008 mg/L. Experimental results and high K-I value obtained from kinetic model show that C. tropicalis was resistant to azo dye and this yeast may be used for biological treatment of industrial wastewaters containing azo dyes.