title: Sequential nitrification-denitrification process for nitrogenous, sulfurous and phenolic compounds removal in the same bioreactor.
abstract: The kinetic and metabolic behavior of an aerobic granular sludge to nitrify, denitrify and nitrify-denitrify was evaluated in batch cultures. In nitrification control, ammonium, 4-methylphenol and sulfide were consumed efficiently (∼100%) and recovered as NO3(-), CO2, S(0) and SO4(2-), respectively. In denitrification control, S(0) and nitrate were efficiently consumed and recovered as SO4(2-) and N2, respectively. Sequential nitrification-denitrification process was evaluated by applying oxic/anoxic conditions. Ammonium, 4-methylphenol and sulfide were oxidized to nitrate, CO2 and mainly S(0), respectively, under aerobic conditions. After that, anoxic conditions were established where S(0) reduced all nitrate to N2, with molecular nitrogen yield (YN2) of 1.03 ± 0.06 mg/mg NH4(+)-N consumed. This is the first study to show the capability of an aerobic granular sludge in simultaneous removal of ammonium, 4-methylphenol and sulfide by sequential nitrification-denitrification process in the same bioreactor.
authors.affiliation: Universidad Autónoma Metropolitana-Iztapalapa, Department of Biotechnology, Av., San Rafael Atlixco 186, C.P. 09340, Mexico.
authors.forename: A
authors.initials: A
authors.lastname: De la Torre-Velasco
authors.forename: R
authors.initials: R
authors.lastname: Beristain-Cardoso
authors.forename: P
authors.initials: P
authors.lastname: Damian-Matsumura
authors.forename: J
authors.initials: J
authors.lastname: Gómez
mesh_terms: D064751:Ammonium Compounds / Q000302:isolation & purification; D061249:Batch Cell Culture Techniques; D001673:Biodegradation, Environmental; D019149:Bioreactors; D003408:Cresols / Q000302:isolation & purification; D058440:Denitrification; D058465:Nitrification; D017672:Nitrogen Compounds / Q000302:isolation & purification*; D010636:Phenols / Q000302:isolation & purification*; D013440:Sulfides / Q000302:isolation & purification; D013457:Sulfur Compounds / Q000302:isolation & purification*; D013997:Time Factors
chemical_list: D064751:Ammonium Compounds; D003408:Cresols; D017672:Nitrogen Compounds; D010636:Phenols; D013440:Sulfides; D013457:Sulfur Compounds; C032538:4-cresol