Enhanced nitrogen removal using C/N load adjustment and real-time control strategy in sequencing batch reactors for swine wastewater treatment

M. Chen, J. H. Kim, N. Kishida, O. Nishimura, R. Sudo

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The laboratory-scale sequencing batch reactor (SBR) was used to study the effectiveness of an integrated strategy of real time control with C/N ratio adjustment for practical swine wastewater treatment. Swine waste was used as the external carbon source for continuous treatment in the SBR reactors. Oxidation-reduction potential and pH were used as parameters to control the continuous denitrification and nitrification process, respectively. A constant effluent quality could be obtained, despite drastic variations in the characteristics of influent wastewater. Also, a relatively complete removal of nutrients was always ensured, since the optimum quantity of the external carbon source could be provided for complete denitrification, and a flexible hydraulic retention time was achieved by the successful real-time control strategy. The average removal efficiencies of total organic carbon and nitrogen were over 94% and 95%, respectively.

Original languageEnglish
Pages (from-to)309-314
Number of pages6
JournalWater Science and Technology
Volume49
Issue number5-6
DOIs
Publication statusPublished - 2004 Jan 1

Keywords

  • Denitrification
  • Real-time control
  • Swine wastewater

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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