EVALUATION OF INNOVATIVE LONG-TERM NITRATE MANAGEMENT SOLUTION FOR BIOSOLIDS APPLICATION FIELDS
Abstract:Groundwater nitrate contamination originated from 20 years of biosolids application from a municipal wastewater treatment facility applied at a 269-acre (109-hectare) site in Columbus, Georgia. The long-term application of biosolids has resulted in elevated concentrations of nitrate (20 to 300 mg/L nitrate as nitrogen) in the shallow groundwater beneath the site. A conceptual plan for long-term management and continued operations of the biosolids application fields is currently being considered by the Georgia Department of Natural Resources – Environmental Protection Division (EPD). The conceptual plan is based on the successful demonstration of nitrate reduction from a pilot-scale field test using enhanced in situ biodenitrification and on-site column studies to measure biodenitrification rates using three different amendments: sodium acetate, emulsified soybean oil (EOS™), and hydrogen gas.
The results of the pilot-scale field test were used to demonstrate the viability of biodenitrification of the site groundwater. The column studies were completed to quantify biodenitrification rates specific to the site. The on-site column study combined the benefits of control provided in a laboratory with the benefits of a field application by minimizing variables inherent with in situ applications while still utilizing site groundwater and indigenous microbial populations.
The data collected in both the pilot-scale field test and the on-site column studies allowed for the development a site-specific and innovative nitrate management plan. The conceptual nitrate management plan utilizes a series of downgradient groundwater extraction wells to both capture and contain nitrate-impacted water prior to off-site migration. The nitrate-impacted groundwater is to then be conveyed to the wastewater treatment plant where an ex situ biodenitrification tank will be utilized to irreversibly destroy the nitrate.
Document Type: Research Article
Publication date: January 1, 2004
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Ingenta Connect is not responsible for the content or availability of external websites