Indexed by:期刊论文

Date of Publication:2009-02-15

Journal:BIOCHEMICAL ENGINEERING JOURNAL

Included Journals:SCIE

Volume:43

Issue:2

Page Number:191-196

ISSN No.:1369-703X

Key Words:Biological nitrogen removal; Biological assimilation; Phosphorus-accumulating organisms; Poly-beta-hydroxybutyrate; Membrane bioreactor

Abstract:In this study, simultaneous carbon. nitrogen and phosphorus (PO(4)(3-)-P) removals using an anoxic/oxic-membrane bioreactor(A/O-MBR) system without any circulation was investigated. The total nitrogen(TN) removal efficiency was above 84.6%, and the average removal efficiencies of COD and PO(4)(3-)-P were 94.6 and 90.0%. respectively. Ammonium (NH(4)(+)-N) removal without nitrite (NO(2)(-)-N) and nitrate (NO(3)(-)-N) accumulation in the reactor suggested that simultaneous nitrification and denitrification (SND) occurred. The phosphorus-accumulating organisms (PAOs) accumulated in the reactor. AnOx/Oxic test indicated that intracellular organic carbon might be utilized as denitrification electron donor in nitrogen removal process. (C) 2008 Elsevier B.V. All rights reserved.