Treatment of Highly Concentrated Phenols Wastewater with a GAC BAF Combined Process
LIU Zhan meng and NIE Fa hui
DOI:
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2009,Pages 135-140
- Abstract
Wastewater with high phenol concentration was treated by uniting granular active carbon (GAC) adsorption and biological aerated filters (BAF). And the operation parameters of GAC adsorption, GAC regeneration, BAF degradation and GAC BAF combined process were studied with tests. It was shown that the combined process can efficiently degrade the wastewater with high phenol concentration. And the GAC adsorption capacity had nothing with influent flux. Moreover, the optimal adsorption effect could be achieved with the condition of influent with the condition that pH was 3 and temperature was 20±2 ℃. The alkaline condition was benefit for GAC regeneration and the influent flux. The BAF’s tolerance to phenol was approximate 1 100 mg/L and the effluent of regeneration should be diluted to appropriate pH value and phenol concentration before entering into the BAF. And the flux chosen for adsorption of combined process should ensure the BAF have enough time to regenerate the other saturated GAC column. The GAC BAF process which combines adsorption and biodegradation was a continuous operation mode and the GAC regeneration had no impacts on the wastewater treatment，with which the technology could overcome the defects on treating wastewater with high concentration of phenols in traditional GAC adsorption and biological technology.