Optimization Removal of COD and Nitrogen at Different Hydraulic Retention Times in Biocord-Integrated Fixed-Film Activated Sludge Syste

Although conventional activated sludge has been demonstrated to be a feasible approach for extracting nitrogenous chemicals and organic pollutants from wastewater, it still number of drawbacks. In this research, pilot-scale biocord-integrated fixed-film (Biocord-IFAS) reactor fed with actual domestic wastewater was operated examine the effect varying hydraulic retention time (HRT) on COD nitrogen removal. The type material employed in study is fibrous polypropylene (biocord), which major difference. contribution Biocord-IFAS removal efficiency reached 94.2% at HRT 8 h gradually decreased 82.9% when reduced 4 h. During investigation period, slight decrease nitrification found shorter HRT. NH4+-N efficiencies HRTs 10, 8, 6, were 97.8%, 98.7%, 97.1%, 96.3%, respectively. average effluent nitrate concentration 5.3 mg/L 10 6 h, but over 30 an SEM analysis results show that microorganisms have formed biocord surface. research potential application IFAS reactors bioremediation procedures employing great processing efficiency.