This unit of competency describes the skills required to monitor, operate and control fixed film aerobic bioreactor processes, including trickling filters and rotating biological contactors. This unit of competency also describes the outcomes required to measure and report on system performance and process quality control.This unit supports the attainment of skills and knowledge required for operational staff with a specific responsibility for fixed film aerobic bioreactor processes in treatment plants.The skills and knowledge described in this unit must be applied within the legislative, regulatory and policy environment in which they are carried out. Organisational policies and procedures must be consulted and adhered to, particularly those relating to safety.Those undertaking this unit would work under supervision, while performing routine tasks, within a range of familiar contexts.No licensing, legislative or certification requirements apply to unit at the time of publication.