Abstract
Denitrifying bacteria (Pseudomonas stutzeri) performs denitrification of waste water under
anaerobic condition. Generally, this bacterium for waste water treatment is operated high density
cultivation (high concentration bacteria shows high removal rate of ammonium nitrogen). However,
this bacteria shows float in medium and flow outside a bioreactor. Therefore, this bacterium has to
be immobilized on polymer carrier. In this study, we try to immobilize of P. stutzeri, and evaluate
culture conditions by removal of ammonium nitrogen. We got the following results, (1) P. stutzeri
adheres to carrier in culture medium, (2) PU (polyurethane) carries strongly adhere P. stutzeri.
