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Evaluation of Phosphorus Loads from Ontario Municipal Wastewater Treatment Plants

In: Statistical Methods for the Assessment of Point Source Pollution

Author

Listed:
  • D. Chapman

    (Environment Canada, Wastewater Technology Centre)

  • W. Randle

    (Environment Canada, Wastewater Technology Centre)

  • Hugh Monteith

    (Ontario Ministry of the Environment, Water Resources Branch)

Abstract

Results are presented from an evaluation of the nature and accuracy of phosphorus loads discharged by Ontario municipal wastewater treatment plants into the Great Lakes. Data were examined for the 96 plants treating flows in excess of 4546 m3 d-1 for the period 1981 to 1985. For the Lake Erie, Lake Ontario/St. Lawrence River and Upper Great Lakes basins, total basin phosphorus loads were classified according to type of wastewater treatment system, the type of chemical added for phosphorus removal, plant capacity, and sampling frequency. Load estimation techniques were compared using the 1985 daily data from three representative treatment plants. Annual phosphorus loads were compared using the complete data records for the plants and using Monte Carlo techniques to simulate an incomplete data record typical of once per week effluent phosphorus sampling. Potential sources of bias were identified in annual phosphorus load estimates from municipal treatment plants.

Suggested Citation

  • D. Chapman & W. Randle & Hugh Monteith, 1989. "Evaluation of Phosphorus Loads from Ontario Municipal Wastewater Treatment Plants," Springer Books, in: D. T. Chapman & A. H. El-Shaarawi (ed.), Statistical Methods for the Assessment of Point Source Pollution, pages 207-221, Springer.
    • Handle: RePEc:spr:sprchp:978-94-009-1960-0_13
    DOI: 10.1007/978-94-009-1960-0_13
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