Journal
FEMS MICROBIOLOGY REVIEWS
Volume 27, Issue 4, Pages 481-492Publisher
OXFORD UNIV PRESS
DOI: 10.1016/S0168-6445(03)00039-1
Keywords
nitrification; anammox; canon; SHARON; NOx cycle; aerobic and anaerobic ammonia oxidation; nitrogen removal; wastewater treatment
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Many countries strive to reduce the emissions of nitrogen compounds (ammonia, nitrate, NOx) to the surface waters and the atmosphere. Since mainstream domestic wastewater treatment systems are usually already overloaded with ammonia, a dedicated nitrogen removal from concentrated secondary or industrial wastewaters is often more cost-effective than the disposal of such wastes to domestic wastewater treatment. The cost-effectiveness of separate treatment has increased dramatically in the past few years, since several processes for the biological removal of ammonia from concentrated waste streams have become available. Here, we review those processes that make use of new concepts in microbiology: partial nitrification, nitrifier denitrification and anaerobic ammonia oxidation (the anammox process). These processes target the removal of ammonia from gases, and ammonium-bicarbonate from concentrated wastewaters (i.e. sludge liquor and landfill leachate). The review addresses the microbiology, its consequences for their application, the current status regarding application, and the future developments. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved.
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