Predicting the fate and the biological treatment parameters of phenol in a wastewater from its initial concentration

Abstract

Abstract Microbial degradation is an important process for removing many organic chemicals from natural waters. The estimation of biodegradability of chemicals which reach the aquatic environment is necessary in assessing the hazard associated with their use. Phenol has many industrial applications and it finds its way into wastewater streams. It is toxic to several biochemical reactions. However, biological transformation of phenol to non-toxic entities is possible. In this article, the data of biodegradation of phenol at different concentrations were studied. For phenol concentrations equal to or less than 147 mg/L, the plateau (the stage associated with the termination of carbon) BOD (biochemical oxygen demand) was calculated to be 169.47% of the corresponding initial phenol concentration, the BOD of the biomass produced up to the plateau was calculated to be 70% of the corresponding initial phenol concentration. This study shows that the biomass produced up to the plateau, the plateau BOD, and the ultimate BOD can all be estimated for phenol concentrations less than 147 mg/L just if the initial phenol concentration is known and without having to repeat the time-consuming BOD experiments.