Development of biofilm on geotextile in a new multi-zone wastewater treatment system for simultaneous removal of COD, nitrogen and phosphorus

► The formation and development of biofilm on a fixed geotextile support. ► Geotextile with filamentous structure enables fast formation of concentrated biofilm. ► The Multi-environment biofilm growth is correlated with N and P removal rates. ► The compact multi-zone treatment system effectively removes organic material, N and P.