Biological denitrification (BDN) provides for a sustainable means of removing nitrate from groundwater supplies used for drinking water. Compared to conventional nitrate removal technologies, such as ion exchange or reverse osmosis, BDN does not generate a high-salinity waste stream, and provides the added benefit of actually destroying the nitrate to nitrogen gas instead of simply accumulating it into a waste product. Many previous studies have demonstrated the viability of BDN for nitrate removal from groundwater. In
WRF project #4470
, the research team aimed at improving the applicability of BDN by evaluating the potential for recoverin/g much of the waste backwash water generated by the process in recognition of the fact that many groundwater wells do not have access to sewers with the capacity to take the full washwater production rate. The researchers also evaluated the potential for hexavalent chromium removal with the BDN process. In this Webcast, the results of the project were presented and discussed. The report for this project has been posted on the WRF Website.