In situ denitrification in controlled landfill systems
Book
·
OSTI ID:395300
- Univ. of Pittsburgh, PA (United States). Dept. of Civil and Environmental Engineering
The characteristics of leachate from landfill disposal sites vary according to the operational stage of the landfill. Leachates from old landfills are often rich in ammonia nitrogen due to the hydrolysis and fermentation of nitrogenous fractions of biodegradable refuse substrates. The relative concentration accumulating as stabilization progresses is also influenced by washout as leachate is collected and removed for external treatment. However, in landfills operated as bioreactors with leachate containment, collection and in situ recirculation to accelerate decomposition of readily available organic fractions of the refuse, leachate ammonia nitrogen concentrations may accumulate to much higher levels. High leachate ammonia nitrogen concentrations in landfill leachate have been reported, resulting in separate treatment challenges if direct discharge to either land or receiving waters is practiced. External treatment options for landfill leachate may involve complex physical-chemical and/or biological processes for removal of both high-strength organic and inorganic fractions, including nitrogen. Such separate leachate treatment systems are often costly and difficult to control on a continuum. Therefore, this study focused on the investigation of landfill ammonia nitrogen generation patterns, and the potential for its in situ attenuation and conversion in landfills constructed to permit sequential nitrification and denitrification using leachate recirculation. Accordingly, the landfill is constructed and operated as a controlled bioreactor system, with opportunity to convert ammonia to nitrate by nitrification and nitrate to nitrogen gas by denitrification. The results presented in this paper focus on in situ landfill denitrification of nitrified ammonia.
- OSTI ID:
- 395300
- Report Number(s):
- CONF-9505206--
- Country of Publication:
- United States
- Language:
- English
Similar Records
In situ nitrification in controlled landfills
Nitrogen removal from landfill leachate via ex situ nitrification and sequential in situ denitrification
Nitrogen removal from recycled landfill leachate by ex situ nitrification and in situ denitrification
Book
·
Tue Oct 31 23:00:00 EST 1995
·
OSTI ID:116368
Nitrogen removal from landfill leachate via ex situ nitrification and sequential in situ denitrification
Journal Article
·
Wed Apr 15 00:00:00 EDT 2009
· Waste Management
·
OSTI ID:21217158
Nitrogen removal from recycled landfill leachate by ex situ nitrification and in situ denitrification
Journal Article
·
Sat Jul 01 00:00:00 EDT 2006
· Waste Management
·
OSTI ID:20877595