Enhancing In-Situ Denitrification - Batch and Column Tests to Pilot Barriers - Livestream

Join us as Dick Raymond and Dr. Michael Lee speak on Enhancing In- Situ Denitrification. Nitrate levels in groundwater and surface water are elevated in many areas of the world because of anthropogenic sources of nitrogen to groundwater, notably discharge from septic systems and nitrogen-containing fertilizers from agriculture. Discharge of nitrogen-enriched groundwaters to coastal embayments can lead to eutrophication, a process whereby excess growth of algae negatively impacts water quality and ecology. Eutrophication poses human health risks as well as economic impacts from reduction in tourism, commercial fishing, and property values. Nitrate in drinking water, which can be impacted surface water or groundwater, is also linked to various adverse health effects. In addition to reducing the human health risks, compliance with the federal CWA and state water quality standards is a key driver to finding methods for reducing nitrogen in the groundwater that feeds into surface water bodies.

Identifying economical and sustainable methods for reducing the nitrogen entering the surface water bodies from the groundwater is an objective for communities across the United States and globally. One such method is permeable reactive barriers(s) or PRBs that are a widely used approach for removing and/or treating contaminants in groundwater. PRBs can address multiple non-point sources of nitrogen that percolate into the aquifer and remove nitrogen from groundwater before discharging to surface water or a potable water extraction well. Permeable Reactive Barriers(s) (PRBs) have been widely used for removal and/or treatment of a range of contaminants in groundwater using various injected/emplaced substrates and/or materials. This presentation will focus upon the remediation product development and design and installation of PRBs for the in-situ biological treatment of nitrate in groundwater using direct injection of carbon substrate electron donors, specifically emulsified vegetable oil (EVO). We will review the key learnings