Role of storage phenomena on removal of different substrates during pre-denitrification.
Removal mechanisms of different substrates during the pre-denitrification step of an anoxic/aerobic sequencing process are studied. Biomass was cultivated in an anoxic/aerobic SBR and fed with a mixture of low and high molecular weight compounds. Substrate removal mechanisms are studied by means of batch tests, performed under anoxic conditions. The dynamic response to a spike of four different substrates (acetate, glucose, glutamic acid and ethanol) is described by simultaneously considering substrate and electron acceptor removal, and PHB and carbohydrates storage. PHB storage is a relevant mechanism during the removal of acetate and ethanol, while glucose is removed mainly by carbohydrate storage.
Majone
M
M
Department of Chemistry, University of Rome La Sapienza, p.le A. Moro 5, 00185 Rome, Italy.
Beccari
M
M
Dionisi
D
D
Levantesi
C
C
Renzi
V
V
D019342:Acetic Acid / Q000302:isolation & purification; D000641:Ammonia / Q000302:isolation & purification; D000693:Anaerobiosis; D018533:Biomass; D019149:Bioreactors; D002241:Carbohydrates / Q000302:isolation & purification; D000431:Ethanol / Q000302:isolation & purification; D018698:Glutamic Acid / Q000302:isolation & purification; D009566:Nitrates / Q000302:isolation & purification; D009573:Nitrites / Q000302:isolation & purification; D009584:Nitrogen / Q000302:isolation & purification*; D009930:Organic Chemicals / Q000302:isolation & purification; D014865:Waste Disposal, Fluid / Q000379:methods*
D002241:Carbohydrates; D009566:Nitrates; D009573:Nitrites; D009930:Organic Chemicals; D000431:Ethanol; D018698:Glutamic Acid; D000641:Ammonia; D009584:Nitrogen; D019342:Acetic Acid