Development of a new type of anaerobic digestion process equipped with the function of nitrogen removal.
In order to develop a new type of anaerobic digestion process equipped with a nitrogen removal function, denitrification of nitrate nitrogen (NO3-N) in anaerobic acidogenesis of organic fraction of municipal waste (OFMSW) was investigated by two semi-continuous reactors. Reactor 1 and Reactor 2 were fed by 3% and 7% of solids concentration of synthetic garbage, respectively. Generation of nitrogen gas (N2) and ammonium nitrogen (NH4-N) was simultaneously observed in the low load of nitrate (NO3-N) (below 0.68 g NO3-N/L). In Reactor 1, ammonium nitrogen generation decreased as the addition of nitrate increased. Finally, the increase of the addition of nitrate resulted in the increase of acetic acid production.
Noike
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Department of Civil Engineering, Graduate School of Engineering, Tohoku University Aoba, Sendai 980-8579, Japan. noike@civil.tohoku.ac.jp
Goo
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Matsumoto
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Miyahara
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D001421:Bacteria, Anaerobic / Q000502:physiology*; D019149:Bioreactors; D005740:Gases / Q000032:analysis; D009566:Nitrates / Q000032:analysis; D009584:Nitrogen / Q000302:isolation & purification*; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012037:Refuse Disposal / Q000379:methods*; D014873:Water Pollutants / Q000302:isolation & purification*
D005740:Gases; D009566:Nitrates; D000644:Quaternary Ammonium Compounds; D014873:Water Pollutants; D009584:Nitrogen