Efficient removal of micropollutants in an anaerobic-aerobic two-stage moving bed biofilm reactor coupling with manganese redox cycling

Activity: Talks and presentationsConference presentations

Description

Manganese oxides can degrade organic micropollutants, but the effectiveness is short-lived and therefore continuous micropollutant degradation by manganese oxides is not feasible. In this study, an engineered cycle of manganese reduction followed by oxidation was implemented in two-stage moving bed biofilm reactors (staged MBBR), aiming to continuously replenish manganese oxides for the removal of both nutrients and micropollutants. In the anaerobic reactor, additional MnO2 was reduced to Mn2+ by microbial-mediated reaction with organic matter in the sewage. Then, the reduced Mn2+ was re-oxidised to biogenic manganese oxides (BioMnOx) in the aerobic reactor. Regularly a part of BioMnOx was recycled to the anaerobic reactor for the next round of manganese reduction. Overall, the manganese redox cycling functioned well and BioMnOx was continuously reformed in the aerobic reactor. For micropollutant removal, bezafibrate, clarithromycin, mefenamic acid and sulfamethoxazole were efficiently removed (over 80%) by the staged MBBR in the batch experiment.
Period20 Apr 2022
Event title16th Annual Danish Water Forum Research Conference
Event typeConference
Conference number16
LocationFrederiksberg, Denmark
Degree of RecognitionNational

Keywords

  • Manganese redox cycling
  • MBBR
  • Micropollutant