Coupled EC-IFAS process demonstrates effective removal of turbidity and nitrogen in aquaculture wastewater, suggesting enhanced treatment efficiency.
Key Points
The research aims to optimize a coupled electrocoagulation-integrated fixed-film activated sludge process for treating aquaculture wastewater with low C/N ratios.
Established EC-IFAS system for aquaculture wastewater treatment.
Conducted single-factor experiments and response surface methodology to optimize EC parameters.
Evaluated turbidity removal efficiency and operational modes for the IFAS reactor.
EC process achieved 93.6% turbidity removal at optimized conditions.
Coupled system resulted in 97.2% total turbidity removal and 93.8% average COD removal.
Stable TN removal efficiency ranged from 75.1% to 81.2%, with PO4^3--P below detection limits.
Dominant microbial genera associated with organic matter degradation and denitrification were identified.