Journal of Chemical Engineering & Process Technology
Open Access
ISSN: 2157-7048
+44-77-2385-9429
ISSN: 2157-7048
+44-77-2385-9429
Leila Azimian and Amarjeet Bassi
Western University, Canada
Posters & Accepted Abstracts: J Chem Eng Process Technol
Desalter effluent is difficult to treat wastewater stream emerging from petroleum refining operations. In this study, an osmotolerant and halotolerant yeast, Debaryomyces hansenii, was investigated for the first time for phenol removal from simulated and actual desalter effluent. D.hansenii was able to degrade phenols at substrate concentrations ranging from 300 to 1200 mg L-1, whereas the substrate inhibition was noted as phenol concentration increased from 2000 to 4000 mg L-1. Three kinetic models (Andrews, Aiba and Edward) were applied as unstructured mathematical models to simulate substrate inhibition kinetics with respect to phenol COD. Among all models, the Edward model best simulated the yeast growth on phenol. Using the Edward model, the model parameters were μmax 0.25 h-1, KS 666.2 mg.L-1 and KI 1189.7 mg.L-1 respectively. The results in this study confirmed that D.hansenii has a high tolerance toward phenols and other organic compounds and salt found in the desalter effluent. This yeast is therefore suggested to serve as an appropriate system from biological treatment of phenolic wastes in difficult to treat effluents such as desalter effluent.
E-mail: Lazimian@uwo.ca