Comparison of different carbon sources for ground water denitrification.
This study presents a comparison of denitrification rates and denitrification stoichiometry when using different sources of carbon. Denitrification tests were carried out in test bottles containing water and soil samples acquired at a nitrate-contaminated site and supplemented with either sucrose, acetate or ethanol. The tests demonstrated nitrate removal in all carbon source supplemented bottles. The rate of denitrification and the required amount of a carbon source, however, depended on the choice of substrate. Ethanol and acetate were found to provide the highest denitrification rate, that of 1.4 - 1.6 mg-N l(-1) d(-1). Sucrose-supplemented bottles demonstrated a significantly slower denitrification rate, that of 0.6 - 0.9 mg-N l(-1) d(-1). In addition to slow denitrification rates, sucrose-supported denitrification required more carbon source.
Lorrain
M-J
MJ
Biotechnology Research Institute, NRC, 6100 Royalmount Ave, Montreal, PQ Canada.
Tartakovsky
B
B
Peisajovich-Gilkstein
A
A
Guioti
S R
SR
D000085:Acetates / Q000737:chemistry* / Q000378:metabolism; D001419:Bacteria / Q000254:growth & development / Q000378:metabolism; D001673:Biodegradation, Environmental; D015169:Colony Count, Microbial; D000431:Ethanol / Q000737:chemistry* / Q000378:metabolism; D005618:Fresh Water / Q000737:chemistry; D009566:Nitrates / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis; D013395:Sucrose / Q000737:chemistry* / Q000378:metabolism; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods*
D000085:Acetates; D009566:Nitrates; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D000431:Ethanol; D013395:Sucrose