Performance and economics of BNR plants in the Chesapeake Bay Watershed, USA

C. W. Randall*, E. U. Cokgor

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

9 Citations (Scopus)

Abstract

The performance and economics of four recently constructed or modified BNR municipal wastewater treatment plants located in the Chesapeake Bay Watershed, USA were evaluated, and compared to a treatment plant implementing chemical phosphorus removal and complete nitrification. Phosphorus removal has been very reliable to effluent concentrations below 0.5 mg/L without chemical addition or effluent filtration at BNR plants that have been operating for more than two years. Significant variation was observed in the wastewater characteristics, and this has affected biological phosphorus removal. Chemical precipitation effluent TP concentrations have averaged less than 0.1 mg/L. The small BNR plant was clearly the most costly to operate per 1000 m3/d of flow, which illustrates economy of scale. The chemical precipitation plant was generally more expensive to operate than the large BNR plants.

Original languageEnglish
Pages (from-to)21-28
Number of pages8
JournalWater Science and Technology
Volume41
Issue number9
DOIs
Publication statusPublished - 2000
Externally publishedYes
Event8th IAWQ International Conference on 'Design, Operation and Economics of Large Wastewater Treatment Plants' - Budapest, Hung
Duration: 6 Sept 19999 Sept 1999

Keywords

  • Biological nutrient removal
  • Cost
  • Municipal wastewater treatment
  • Performance
  • Wastewater characterization

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