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Partial nitrification of ammonium-rich wastewater as pretreatment for anaerobic ammonium oxidation (Anammox) using membrane aeration bioreactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
22495 43295 2007 6 PDF Available
Title
Partial nitrification of ammonium-rich wastewater as pretreatment for anaerobic ammonium oxidation (Anammox) using membrane aeration bioreactor
Abstract

A lab-scale membrane aeration bioreactor (MBR) system was developed for treating synthetic ammonium-rich wastewater to yield an appropriate NO2−/NH4+ mixture as a pretreatment for anaerobic ammonium oxidation (Anammox). The effluent with a suitable NO2−/NH4+ ratio (1:1 to 1:1.3) was obtained in 24 h using the developed MBR system under suitable conditions. Additionally, the control of bulk dissolved oxygen (DO) level under a desired condition (anoxic condition) was easier and more economical than traditional aeration systems. An optimal initial alkalinity of 1500 mg CaCO3l−1 was necessary for achieving 50% partial nitrification of wastewater with an initial ammonium concentration of 510 mg NH4-N l−1 within 24 h. Furthermore, there is no need for pH adjustment by adding a base or an acid throughout the reaction if the initial alkalinity is appropriately controlled. Both the appropriate NO2−/NH4+ ratio and the low DO level make this MBR system an ideal system for Anammox.

Keywords
partial nitrification; ammonia-oxidizing bacteria; Anammox; membrane aeration bioreactor
First Page Preview
Partial nitrification of ammonium-rich wastewater as pretreatment for anaerobic ammonium oxidation (Anammox) using membrane aeration bioreactor
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 104, Issue 3, September 2007, Pages 182–187
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering