Innovative trickling biofilter system for hospital wastewater treatment

Abstract

Innovative Trickling biofilter system was applied for wastewater treatment of Danang Rehabilitation - Sanatorium Hospital in this study. The residts have shown that the removal efficiencies of COD and BODj at loading of 2.5 - 4 kg/m^.day were about 90 %. The inlet concentrations of and N-N03' were so high as 33.1 and 26.2 mg/L, respectively. However, the remaining of treated wastewater concentration is 1.4 and 5.2 mg/L, coưesponding to the removal efficiencies of 97 and 80 %, respectively. Otherwise, the values of total suspended solid (TSS), phosphates (P), and coliforms were below the limitations of QCVN 28:2010/BTNMT, column A. Resulting fi^m the obtained data in this study, we emphasize that the innovative trickling biofilter system with air supply is appropriate with health-care wastewater ưeatment and consistent with economic and operating conditions in Vietnam.