Title

Strategy For Complete Nitrogen Removal In Bioreactor Landfills

Keywords

Abatement and removal; Aerobic treatment; Denitrification; Landfills; Nitrification

Abstract

Waste acclimation and batch microcosm studies containing digested municipal solid waste were conducted at different temperatures (22, 35, and 45°C) and gas-phase oxygen concentrations (0.7-100%, by volume) to provide guidance for field-scale implementation of in situ nitrogen removal processes. Results demonstrate that in situ ammonia-nitrogen is feasible in decomposed aerated solid waste environments at the gas-phase oxygen concentrations and temperatures evaluated and the potential for simultaneous nitrification and denitrification in field-scale bioreactor landfills is significant due to the presence of both aerobic and anoxic areas. Small amounts of oxygen were found sufficient for nitrification/ammonia removal to proceed, although removal rates increase with oxygen concentration. Laboratory results suggest field-scale implementation of in situ nitrogen removal occur in small dedicated treatment zones containing previously degraded waste (later in the life of a bioreactor landfill). Model simulations indicate removal of ammonia-nitrogen to low levels can occur with relatively short aeration depths (depth estimates ranged from 1.6 to 7.2 m below the point of leachate injection). Field-scale verification of these depth estimates is required prior to routine acceptance. © 2007 ASCE.

Publication Date

11-23-2007

Publication Title

Journal of Environmental Engineering

Volume

133

Issue

12

Number of Pages

1117-1125

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1061/(ASCE)0733-9372(2007)133:12(1117)

Socpus ID

36248974585 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/36248974585

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