Environmental and operational factors affecting carbon removal in model arctic waste stabilization ponds

Colin M. Ragush, Joanna M. Poltarowicz, Justine Lywood, Graham A. Gagnon, Lisbeth Truelstrup Hansen, Rob C. Jamieson

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Wastewater Stabilization Ponds (WSPs) are passive treatment systems influenced by both the ambient environment and the manner in which they are operated. Construction of wastewater treatment facilities is particularly challenging in the Canadian Arctic because of the remoteness of the communities and the extreme climate. Here, experimental bench scale WSPs were used to simulate single cell WSPs operating under summer treatment conditions in the Arctic. Experiments were performed to examine factors (temperature, irradiance, initial carbon concentrations, and organic loading rate) that may influence the oxygen state and carbon removal. All four factors were found to significantly (p30 mg/l. Phytoplankton growth and metabolism appears to have a prominent impact on CBOD5 removal and the oxygen status of the experimental WSP5. The findings suggest that WSP5 operating in cool arctic climates are more sensitive to perturbation by weather or operational changes than similar systems in warmer climates, and greater consideration for process resiliency needs to be incorporated into the design of arctic WSPs. This study provides further evidence that WSPs are an appropriate municipal wastewater technology for the Arctic and can achieve effluent CBOD5 concentrations that meet secondary wastewater treatment standards, provided they are appropriately sized, designed, and operated for arctic conditions. (C) 2016 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalEcological Engineering
Volume98
Pages (from-to)91-97
Number of pages7
ISSN0925-8574
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • Environmental Engineering
  • Nature and Landscape Conservation
  • Management, Monitoring, Policy and Law
  • Arctic
  • Biological treatment
  • Municipal wastewater
  • Oxygen dynamics
  • Phytoplankton
  • Wastewater stabilization ponds
  • Biological water treatment
  • Effluent treatment
  • Effluents
  • Lakes
  • Oxygen
  • Sewage lagoons
  • Stabilization
  • Stabilization ponds
  • Temperature
  • Municipal wastewaters
  • Wastewater treatment

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