Sun, GuangzhiGuangzhiSunZhao, Y.Q.Y.Q.ZhaoAllen, StephenStephenAllen2011-09-232011-09-232004 Elsev2005-01-26Journal of Biotechnology0168-1656http://hdl.handle.net/10197/3172This study investigated the efficiency of a four-stage tidal flow constructed wetland system for the removal of organic matter and ammoniacal-nitrogen from diluted piggery wastewater. The results demonstrated that the operation of tidal flow enhanced the transfer of oxygen into wetland matrices. The overall oxygen consumption rate in the tidal flow system (357 gO2/m2∙d) was considerably higher than the rate obtainable in conventional wetlands. Most oxygen consumption (99%) was due to the decomposition of organic matter. The total supply of oxygen into the wetlands (473 gO2/m2∙d) exceeded the demand for the treatment. The percentage removal of BOD5 and NH4-N was improved by effluent recirculation at a ratio of 1:1. Immobilization by microbial cells and adsorption were found to be the main routes for the removal of ammoniacal-nitrogen. Significant nitrification could not take place under the treatment condition of the experiment.205795 bytesapplication/pdfenThis is the author’s version of a work that was accepted for publication in Journal of Biotechnology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Biotechnology, 115 : 189-197 DOI 10.1016/j.jbiotec.2004.08.009.AmmoniaBiofilmBOD5Reed bedWastewater treatmentAmmoniaBiofilmsWater--Purification--Organic compounds removalBiochemical oxygen demandConstructed wetlandsJournal Article115218919710.1016/j.jbiotec.2004.08.009https://creativecommons.org/licenses/by-nc-sa/1.0/