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Nitrate and nitrite injection during municipal solid waste anaerobic biodegradation
- Source :
- Waste Management, Waste Management, Elsevier, 2007, 27 (6), pp.778-791. ⟨10.1016/j.wasman.2006.02.020⟩
- Publication Year :
- 2007
- Publisher :
- Elsevier BV, 2007.
-
Abstract
- Nitrified leachate recirculation has been proposed as a promising strategy for sustainable landfill management. In four test reactors, nitrate or nitrite was added (250 mg N-NO(x)(-)L(-1)) during municipal solid waste biodegradation. Nitrogen-oxides reduction reactions were monitored. Denitrification was the main nitrogen reducing reaction observed. On one hand, during the acidogenic waste degradation phase, as high amounts of volatile fatty acids (VFA) were present, nitrogen-oxides reductions were interpreted as heterotrophic denitrifications. On the other hand, denitrification reactions occurring during the late methanogenic phase were accompanied by sulphate productions and, as VFA were not detected, it was probably an autotrophic reaction. Denitrification inhibition was observed once. Ammonium concentration increased suggesting the occurrence of a dissimilatory nitrate reduction to ammonium (DNRA). Statistical treatment of analytical data revealed that only H(2)S concentration had a significant negative effect on N(2) production in our system. NO production was observed once when nitrite was injected during the acidogenic phase resulting in a total waste degradation inhibition. These results indicate that the consequences of nitrified leachate recirculation in full-scale landfills need to be carefully examined especially during the acidogenic phase or in the presence of waste containing high quantities of sulphur.
- Subjects :
- Acidogenesis
Time Factors
Municipal solid waste
Denitrification
Nitrogen
Inorganic chemistry
ANAEROBIC DIGESTION
010501 environmental sciences
01 natural sciences
03 medical and health sciences
chemistry.chemical_compound
Bioreactors
Nitrate
Ammonium
Anaerobiosis
Leachate
LEACHATE
Nitrite
Waste Management and Disposal
Nitrites
0105 earth and related environmental sciences
0303 health sciences
Nitrates
030306 microbiology
MICROORGANISM
DENITRIFICATION
Biodegradation
6. Clean water
Refuse Disposal
FULL-SCALE LANDFILL
Biodegradation, Environmental
chemistry
Environmental chemistry
[SDE]Environmental Sciences
NITROGEN MANAGEMENT
France
Gases
Oxidation-Reduction
Subjects
Details
- ISSN :
- 0956053X
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- Waste Management
- Accession number :
- edsair.doi.dedup.....a9f9a4ca39717e04fd07f7dc4a14a77a