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Bioresour Technol. 2013 Aug;142:714-8. doi: 10.1016/j.biortech.2013.05.068. Epub 2013 May 24.

Species of phosphorus in the extracellular polymeric substances of EBPR sludge.

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  • 1School of Earth and Space Sciences, University of Science & Technology of China, Hefei 230026, China.


In this study, the species of extracellular phosphorus and their transformation during extracellular polymeric substances (EPS) extraction were explored by using (31)P nuclear magnetic resonance spectroscopy. Results show that the extraction methods had a substantial influence on the phosphorus species in the extracted EPS. Cation exchange resin method was more appropriate for extracting EPS from the enhanced biological phosphorus removal (EBPR) sludge. Orthophosphate, pyrophosphate and polyphosphate were the main species of phosphorus found to be present in the EPS, which together accounted for about 6.6-10.5% of the total phosphorus in the EBPR sludge. The high percentage of extracellular phosphorus and their diverse species might reveal a new insight into the characteristics of the phosphorus in EPS in EBPR system.

Copyright © 2013 Elsevier Ltd. All rights reserved.


(31)P nuclear magnetic resonance ((31)P NMR); Enhanced biological phosphorus removal; Extracellular polymeric substances (EPS); Phosphorus species

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