Abstract
BackgroundPhenols 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%.MethodsKinetic 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.ResultsThe 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.ConclusionsHamoda model and the Modified Stover-Kincannon model having highest R2 value of 0.991 and 1, respectively, and also predicting reasonable kinetic coefficient values.
Highlights
Phenols are chemical compounds which are included in the high priority of pollutants by environmental protection agency (USEPA)
Hamoda proposed a mathematical model based on Monod model making it possible to determine the kinetic coefficients of aerobic submerged attached growth reactor
The kinetic coefficients were determined at phenol concentration of 500 mg/l and salinity of 3%
Summary
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%. The concentrations of phenol in refinery and petrochemical industries, are in the ranges of 6–500 and 2.8-1220 mg/ml, respectively [8] Various methods such as physical and chemical ones exist for the removal of Kinetic models which related to culture growth and substrate utilization in presence of some inhibitory materials are showed in Table 1: [12]. Haldane model is applied for representing the growth in both lower and higher concentrations of inhibitory materials
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