EXPERIENCES WITH ONLINE MEASURING INSTRUMENTS FOR SBR-OPERATION IN KALMAR / Erfarenheter av online-mätinstrument för SBR-driften i Kalmar

Expansion for nitrogen reduction on Kalmar wastewater Treatment Plant (KARV) was realized with 2 sequencing batch reactors (SBR) for separate treatment of filtrate water. Online measuring instrumems were installed to make control of the SBR-process easier. The waterlevel and DO-meters are used for automatic operation control, whereas information on sludge content, pH, redox-pontential, ammonium and nitrate content is used for monitoring and manual adjustment of process operation. The economical balance of on the one hand investment and operational costs and on the other hand environmenial effect cannot be set-up. Nevertheless, after one year of operation of online instruments for the SBR-process on KARV, it was decided to continue with this manner of operation.