CIRCOX®:
Three-in-one aerobic treatment system

• Removal of organic compounds (COD), ammonia and sulfides
• Compact design as volumetric loading rates are five times higher than conventional systems
• High conversion rates (over 5 kg of COD/m³ per reactor per day)
• Odorless off-gas and effluent
• Good oxygen transfer rates
• Low biological sludge production

If deep COD removal is required, CIRCOX® is a fully closed aerobic system with outstanding performance. It is very suitable for aerobic polishing of anaerobic effluent in urban areas because the bioreactors are relatively small and require little space, whilst the technology has a high volumetric conversion.

The mixing of water, gas and biomass is very good which leads to high conversion rates.

CIRCOX® uses biofilm on a carrier material, so high concentrations of bacteria can eat the compounds, and the biological sludge slowly grows. This granular sludge is kept in suspension by means of airlifts. They have a high density and excellent settling properties. The granules are retained by a tilted plate settler on top of the reactor.

In addition to COD removal, CIRCOX® nitrifies ammonia and fully removes nitrogen with the special extension of an anoxic zone. In combination with a DAF - this is necessary as solids wash through the system - CIRCOX® results in high quality water.