Denitrification by Alcaligenes denitrificans in a closed rotating biological co...

• Author(s): Teixeira, P. ; Oliveira, Rosário
• Date: 2000
• Persistent ID: http://hdl.handle.net/1822/1829
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Alcaligenes denitrificans; Biofilm; Denitrification; Phosphorous concentration; Rotating biological contactor
• Document Type: Article
• Language: English

Description

Biological denitrification using a pure culture of Alcaligenes denitrificans was investigated in a closed rotating biological contactor, which operated with a hydraulic retention time of 2 h, a carbon/nitrogen ratio of 2:1, with a dissolved O2 concentration below 6 mg lˉ¹ and under three different phosphate concentrations. Alcaligenes denitrificans was not repressed by O2 limitation and the removal of nitrate was about 30% more efficient at the intermediate phosphate concentration (20 mg P lˉ¹).