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Removal of ammoniacal-nitrogen from an artificial landfill leachate in downflow reed beds

Paper ID Volume ID Publish Year Pages File Format Full-Text
36729 45146 1976 6 PDF Available
Title
Removal of ammoniacal-nitrogen from an artificial landfill leachate in downflow reed beds
Abstract

The fate of ammoniacal-nitrogen (NH4-N) was studied in a lab-scale downflow reed bed system treating an artificial landfill leachate. Individual reed beds were saturated by the leachate, then drained and rinsed by tap water. NH4-N was removed by a two-stage process, adsorption onto the reed bed media followed by nitrification into nitrite-nitrogen (NO2-N) and nitrate-nitrogen (NO3-N). Decrease of the NH4-N level of the leachate was observed when the reed beds were saturated. By rinsing the beds, part of the NH4-N adsorbed inside the bed matrices was released into the rinse water. The presence of NO2- and NO3-N in the rinse water demonstrated that nitrification took place while NH4-N was retained inside the bed matrices. For artificial leachates with NH4-N levels of 150±5 mg/l, an average removal rate of 44% in a 3 h treatment was achieved. Mass balance analysis indicated that adsorption, transformations into NO2- and NO3-N accounted for 64, 4 and 24% of the NH4-N removal, respectively. This study also demonstrated that in general a greater rate of effluent recirculation around downflow reed beds gives higher NH4-N removal.

Keywords
Adsorption; Ammoniacal-nitrogen; Leachate; Nitrification; Reed bed; Wastewater treatment
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Removal of ammoniacal-nitrogen from an artificial landfill leachate in downflow reed beds
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 39, Issue 12, 29 October 2004, Pages 1971–1976
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us