Optimum Carbon/Nitrogen Ratio for upgrading single-stage activated sludge process in the Frozen Seafood Industry

Abstract

The study aimed to upgrade the nitrogen removal efficiency in the existing activated sludge process for treating the effluent from anaerobic treatment units in the frozen seafood industry. The experiments provided simultaneous nitrification-denitrification in the single-stage activated sludge process without major changes being made in the civil engineering system. Under very low operating oxygen concentration, with oxidation-reduction potential for aeration control, The carbon/nitrogen ratio was proved to be the main factor for high nitrogen removal efficiency in the process. COD:TKN in this study was 10:1. It can provide for both satisfactory simultaneous carbon and nitrogen removal.

Keyword: COD:TKN ratio, Frozen seafood industry, Simultaneous
nitrification-denitrification