Comparison of nutrient removal efficiency between pre- and post-denitrification wastewater treatments

K. Hamada, T. Kuba, V. Torrico, M. Okazaki, T. Kusuda

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A shortage of organic substances (COD) may cause problems for biological nutrient removal, that is, lower influent COD concentration leads to lower nutrient removal rates. Biological phosphorus removal and denitrification are reactions in which COD is indispensable. As for biological simultaneous nitrogen and phosphorus removal systems, a competition problem of COD utilisation between polyphosphate accumulating organisms (PAOs) and non-polyphosphate-accumulating denitrifiers is not avoided. From the viewpoint of effective utilisation of limited influent COD, denitrifying phosphorus-removing organisms (DN-PAOs) can be effective. In this study, DN-PAOs activities in modified UCT (pre-denitrification process) and DEPHANOX (post-denitrification ptocess) wastewater treatments were compared. In conclusion, the post-denitrification systems can use influent COD more effectively and have higher nutrient removal efficiencies than the conventional pre-denitrification systems.

Original languageEnglish
Pages (from-to)169-175
Number of pages7
JournalWater Science and Technology
Volume53
Issue number9
DOIs
Publication statusPublished - Jul 5 2006

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology

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