Removal Efficiency of Phenols from Chemical Wastewater by a Treatment Plant Using Activated Carbon Adsorption and Coagulation Precipitation Processes

The removal efficiency of phenols from the treatment plant of chemical wastewater by use of activated carbon adsorption and coagulation precipitation processes was investigated. The results of monitoring for one year showed that the removal efficiency of phenols from wastewater by the treatment was on the average 73.6%. Our experiments showed that the prolongation of reaction time of activated carbon adsorption to 30 min sufficiently improved the removal efficiency of phenols. Activated carbon adsorption process was very effective to remove phenols, but coagulation precipitation process was not effective.