Abstract
Nitrification of ammonium in wastewater was investigated by a bio-electro reactor process under low DO conditions. A flat carbon plate attached nitrifying bacteria was used as anode and a stainless plate was used as cathode. In order to investigate the effect of bulk liquid DO concentration on nitrification, the experiments were carried out under both high DO (5.0 g·m-3) and low DO (0.1 g·m-3) conditions. Electric current applied was changed from 0.0075A to 0.03A.
Under the low DO condition, nitrification rate increased with an increase in applied electric current. However, under the high DO condition, the effect of applying electric current on nitrification was small. Production of nitrite was very small under both the high and low DO conditions. Effects of electric field on the nitrification rate was not observed within the experimental range.
