Effective microbes for simultaneous bio-oxidation of ammonia and manganese in biological aerated filter system

► Effective microbes for simultaneous bio-oxidation of NH4+-N and Mn2+ were isolated. ► Screening test to determine the most effective microbe was performed. ► Six bacteria were isolated from two conditions of mixed culture. ► Bacillus cereus was the most effective microbe for the bio-oxidation of NH4+-N and Mn2+. ► Simultaneous bio-oxidation of NH4+-N and Mn2+ was achieved in BAF system.