title: Effect of electron donors on anammox coupling with nitrate reduction for removing nitrogen from nitrate and ammonium.
abstract: Anammox coupling with nitrate reduction under various electron donors was studied using sludge acclimatized to have anammox and denitrification activities. Due to a deficiency in electron donors for NO(3)(-) reduction, anammox activity in an inorganic medium containing NO(3)(-) and NH(4)(+) was lower than that in NO(2)(-) and NH(4)(+). Anammox could use NO(2)(-) competitively against denitrifiers under a very limited NO(2)(-) concentration, and additions of swine wastewater or acetate stimulated anammox activity in an inorganic medium containing NO(3)(-) and NH(4)(+) with no inhibition effects. However, a high concentration of swine wastewater caused an exponential increase in denitrification activity. The addition of hydrogen and iron stimulated anammox activity in an inorganic medium containing NO(3)(-) and NH(4)(+), but iron showed an inhibitory effect on anammox in a medium containing NO(2)(-) and NH(4)(+). Hydrogen was shown to be advantageous since it did not increase denitrification even when its addition was increased.
authors: Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Ikenodai 2, Tsukuba 305-0901, Japan. mwaki@affrc.go.jp
authors: Miyoko
authors: M
authors: Waki
authors: Tomoko
authors: T
authors: Yasuda
authors: Yasuyuki
authors: Y
authors: Fukumoto
authors: Kazutaka
authors: K
authors: Kuroda
authors: Kazuyoshi
authors: K
authors: Suzuki
mesh_terms: D000085:Acetates / Q000737:chemistry; D000693:Anaerobiosis; D000818:Animals; D058440:Denitrification; D006859:Hydrogen / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry; D009566:Nitrates / Q000737:chemistry*; D009584:Nitrogen / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry; D013552:Swine; D013696:Temperature; D062065:Wastewater / Q000737:chemistry
chemical_list: D000085:Acetates; D006859:Hydrogen; D007501:Iron; D009566:Nitrates; D009584:Nitrogen; D000644:Quaternary Ammonium Compounds; D013440:Sulfides; D062065:Wastewater