Simultaneous Removal of Nitrogen and Phosphorous from Municipal Wastewater Using Continuous-Flow Integrated Biological Reactor
Publication: Journal of Environmental Engineering
Volume 134, Issue 3
Abstract
A pilot-scale experiment was carried out to study the simultaneous removal of nitrogen and phosphorous from municipal wastewater by an innovative continuous-flow integrated biological reactor (CIBR) process. A three-phase separator was used in the CIBR process, which not only saved energy consumption of sludge returning, but also solved the sludge–gas separating problem. The optimal working condition was aeration, agitation, and settling, with an energy consumption of . The average removal of chemical oxygen demand (COD), ammonia nitrogen , total nitrogen (TN), and total phosphorus (TP) under the optimal conditions were 72.87, 75.23, 61.25, and 68.25%, respectively. The distributing rules of dissolved oxygen, pH, mixed liquid suspended solid, COD, , , TN, and TP in each phase of CIBR was studied. It was indicated that the appropriate condition was created for the simultaneous removal of nitrogen and phosphorus in the integrated reactor. The study demonstrated the feasibility of using CIBR process for simultaneous removal of nitrogen and phosphorus at the average temperature 12.2°C.
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Acknowledgments
This project was funded by the High Technology Research Development Plan (HTRDP) of China (No. 2003AA601110 and No. 2005AA601060). The kind help from Mr. Piotr Grabowiecki (University of Edinburgh, Scotland, U.K.) and Mr. David Oliver (Queen Margaret University, Scotland, U.K.) were gratefully acknowledged.
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Information
Published In
Journal of Environmental Engineering
Volume 134 • Issue 3 • March 2008
Pages: 169 - 176
Copyright
© 2008 ASCE.
History
Received: Nov 27, 2006
Accepted: Sep 18, 2007
Published online: Mar 1, 2008
Published in print: Mar 2008
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