Effects of wastewater on phosphorus, nitrogen, and nuisance benthic algae in nearshore regions of a large lake DOI Creative Commons
Zhuoyan Song,

Krista M. Chomicki,

Kenneth Drouillard

и другие.

The Science of The Total Environment, Год журнала: 2025, Номер 962, С. 178484 - 178484

Опубликована: Янв. 1, 2025

Upgrading wastewater treatment plants (WWTPs) is a global practice for achieving increasingly stringent nutrient discharge objectives set by governments to accommodate population growth and reduce surface water pollution. However, associated downstream improvements in conditions are difficult determine nearshore regions of large aquatic ecosystems due complex biophysical processes. We conducted nine-year quality study analyzed the data using linear mixed models (LMMs) within Before-After-Control-Impact (BACI) framework assess effects an upgrade Duffin Creek Water Pollution Control Plant (DCWPCP) on proliferation nuisance benthic algae (Cladophora glomerata) Lake Ontario. The DCWPCP resulted increased effluent concentrations loads nitrite+nitrate (NO2+3) enhanced nitrification, while reducing total Kjeldahl nitrogen ammonia+ammonium (NH3+4). phosphorus (TP) only changed slightly operational constraints during plant upgrade. For conditions, our LMM-BACI revealed that, after upgrade, NH3+4 decreased at impact site relative control sites. In contrast, following observed decline NO2+3 was less pronounced compared sites, suggesting inputs into from DCWPCP. could not detect obvious improvement TP concentrations, stoichiometric ratios inorganic TP, or tissue content Cladophora, likely slight reduction Overall, findings showed that inputs, which have important implications management trade-offs with WWTP upgrades one chemical species expense another. Other researchers may find useful localized impacts coastal areas where multiple physical climate drivers influence quality.

Язык: Английский

Effects of wastewater on phosphorus, nitrogen, and nuisance benthic algae in nearshore regions of a large lake DOI Creative Commons
Zhuoyan Song,

Krista M. Chomicki,

Kenneth Drouillard

и другие.

The Science of The Total Environment, Год журнала: 2025, Номер 962, С. 178484 - 178484

Опубликована: Янв. 1, 2025

Upgrading wastewater treatment plants (WWTPs) is a global practice for achieving increasingly stringent nutrient discharge objectives set by governments to accommodate population growth and reduce surface water pollution. However, associated downstream improvements in conditions are difficult determine nearshore regions of large aquatic ecosystems due complex biophysical processes. We conducted nine-year quality study analyzed the data using linear mixed models (LMMs) within Before-After-Control-Impact (BACI) framework assess effects an upgrade Duffin Creek Water Pollution Control Plant (DCWPCP) on proliferation nuisance benthic algae (Cladophora glomerata) Lake Ontario. The DCWPCP resulted increased effluent concentrations loads nitrite+nitrate (NO2+3) enhanced nitrification, while reducing total Kjeldahl nitrogen ammonia+ammonium (NH3+4). phosphorus (TP) only changed slightly operational constraints during plant upgrade. For conditions, our LMM-BACI revealed that, after upgrade, NH3+4 decreased at impact site relative control sites. In contrast, following observed decline NO2+3 was less pronounced compared sites, suggesting inputs into from DCWPCP. could not detect obvious improvement TP concentrations, stoichiometric ratios inorganic TP, or tissue content Cladophora, likely slight reduction Overall, findings showed that inputs, which have important implications management trade-offs with WWTP upgrades one chemical species expense another. Other researchers may find useful localized impacts coastal areas where multiple physical climate drivers influence quality.

Язык: Английский

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