- Effect of bicarbonate concentration on Anaerobic ammonium oxidation for efficient autotrophic nitrogen removalZekker, Ivar; Rikmann, Ergo; Tenno, Toomas; Menert, Anne; Lemmiksoo, Vallo; Kolberg, K.; Tenno, TaavoIWA Specialist Conference Water and Industry : Valladolid, Spain, 1-4 May 2011 : final program2011 / p. 16