Abstract
The single basin & high-load biological denitrification system with alternative aeration is an excellent system which consists of simple components & performs flexible operation. Usually indirect parameters such as DO, ORP & p H etc.have been used to control denitrification reactors. The authors tried to monitor NH4-Nin a reactor by using newly developed automated analyzer combined with UF sampler, & then tried to control the operation of a denitrification reactor by using fuzzy inference. The fuzzy control system infers a suitable condition from multi-variables (NH4-N, DO, ORP & p H) obtained in an actual process. The fuzzy control system performed quick response & high nitrogen removal with stability & easy maintenance.
