Treatment of N-Nitrosodimethylamine (NDMA) in Groundwater Using a Fluidized Bed Bioreactor
Abstract
This ESTCP demonstration evaluated the technical effectiveness and cost of a fluidized bed bioreactor (FBR) for treating N-ni trosodunethylam ine (NDMA) in groundwater. The demonstration site was the NASA White Sands Test Facility (WSTF) in Las Cruces, NM. The FBR system consisted of a single bioreactor ( I fl diameter x 11.75 ft tall) that operated at now ntte.~ ranging from - I to 5 gpm, and was feel oxygen, propane, and inorganic nutrients to slim ulate propanotrophic bacteria to biodegmde NOMA. The FBR was clocWllentecl to be an effective mean~ to treat NDlviA in groundwater from - I )lg/L to below 4.2 ng/L, the current regulatory discharge lim it at WSTF at a 20 minute hydraulic residence time. The FBR also treated N-nitrodimethylamine consistently to < I 0 ngfL. The FBR was rel iable with greater than 94% up time, and was resil ient to upset~ including power outages, lack of innuent groundwater now, and absence of propane and nutrients for several days. The cost of a full-scale FBR ( 125 gpm system)was determined to be significantly less that a comparable ultraviolet system over a 30 year remedial timeframe.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2014
- Accession Number
- ADA607489
Entities
People
- Paul B. Hatzinger
- Todd Webster