A pilot study on phosphate and nitrate removal from secondary wastewater effluent using a selective ion exchange process

Environmental Technology
A D Kney, D Zhao

Abstract

A pilot study was conducted at a wastewater treatment plant (WWTP) in Easton, Pennsylvania, for the removal of varying concentrations of phosphate (HPO4(2-)) and nitrate NO3- using a newly developed ion exchange material referred to as Polymeric Ligand Exchanger (PLE). The PLE was prepared by immobilizing copper (II) ions onto a commercially available chelating resin, DOW-3N. The loaded copper ions act as ligand exchanger sites that selectively bind with target ligands such as phosphate and nitrate. This pilot study was the final experimental testing phase of the PLE toward the full process development for the selective removal of both phosphate and nitrate using secondary effluent from a fully operational WWTP. In order to establish the effectiveness of the PLE, a commercially available activated alumina (AA) was also tested for comparison. Effluent phosphorus and nitrate concentration of less than 0.1 mg l(-1) were achieved for up to 500 bed volumes; phosphorous was reduced from an average concentration of 4.0 mg l(-1) and nitrate from average concentration of 16.4 mg l(-1). In accord with prior laboratory observations, the pilot test results showed that the PLE could selectively remove phosphate from secondary municipal wast...Continue Reading

Citations

Mar 8, 2011·Chemosphere·Bruce E RittmannMark Edwards
Aug 4, 2010·Bioresource Technology·H Noureddini, J Dang
Feb 10, 2006·Journal of Biochemical and Biophysical Methods·Katerina KrácalíkováMiroslav Bleha
Nov 26, 2009·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Antoni Rodríguez-FornellsRuth de Diego-Balaguer
Feb 19, 2017·Applied Microbiology and Biotechnology·Jing-Han WangHong -Ying Hu

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