Title of article :
Kinetic studies on the removal of phenol by MBBR from saline wastewater
Author/Authors :
ahmadi, mehdi ahvaz jundishapur university of medical sciences - environmental technologies research center - department of environmental health engineering, ايران , jaafarzadeh, neamat ahvaz jundishapur university of medical sciences - environmental technologies research center - department of environmental health engineering, ايران , ghaed rahmat, zeinab behbahan faculty of medical sciences - department of environmental health engineering, ايران , ghaed rahmat, zeinab ahvaz jundishapur university of medical sciences, ايران , babaei, ali akbar ahvaz jundishapur university of medical sciences - environmental technologies research center - department of environmental health engineering, ايران , alavi, nadali shahid beheshti university of medical sciences - environmental and occupational hazards control research center, school of public health - department of environmental health engineering, ايران , baboli, zeinab behbahan faculty of medical sciences - department of environmental health engineering, ايران , vosoughi niri, mehdi ardabil university of medical sciences - faculty of health - department of environmental health engineering, ايران
Abstract :
Background: Phenols are chemical compounds which are included in the high priority of pollutants by environmental protection agency (USEPA). The presence of high concentrations of phenols in wastewaters like oil refineries, petrochemical plants, olive oil, pesticide production and oil field operations contain high soluble solids (TDS) and in an olive oil plant, wastewater is acidic, high salty and phenol concentrations are in the range of 0.1- 1%. Methods: Kinetic parameters were calculated according to Monod, Modified Stover- Kincannon, Hamoda and Haldane models. The influence of different initial phenol concentrations on the biodegradation rate was performed. The concentrations of phenol varied from 0 to 500 mg/l. Results: The value of Ki in saline phenolic wastewater in attached growth systems was higher than suspended growth systems that represented a higher phenol inhibition in suspended growth systems. It was obvious that the best model fitting the obtained data are Hamoda model and the Modified Stover-Kincannon model, having highest R2 values of 0.991 and 1, respectively. The value of Ki in saline phenolic wastewater in attached growth system was higher than suspended growth systems which represented a higher phenol inhibition in suspended growth systems. Conclusions: Hamoda model and the Modified Stover-Kincannon model having highest R^2 value of 0.991 and 1, respectively, and also predicting reasonable kinetic coefficient values.
Keywords :
Saline wastewater , Phenol , MBBR , Kinetic model , Biological process
Journal title :
Iranian Journal of Environmental Health Science and Engineering (IJEHSE)
Journal title :
Iranian Journal of Environmental Health Science and Engineering (IJEHSE)
