Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Occurrence and Source of Phosphite (HPO3 2–) during Municipal Wastewater Treatments
https://orcid.org/0000-0003-1664-6909
https://orcid.org/0000-0003-4232-4364
The occurrence, fate, and source of phosphite (HPO3 2–), a highly soluble, reduced phosphorus (P) compound that is often overlooked in the P biogeochemical cycle, were investigated in municipal wastewater treatment systems. Wastewater samples were collected from influent wastewater, preprimary and postprimary clarifiers, postaeration basin, postsecondary clarifier, return activated sludge (RAS), final discharge, anaerobic digester influents, and effluents. HPO3 2– was present in wastewater samples but varied depending on the source. Highest concentrations were measured in anaerobic digester influents and effluents (50–60 μg L–1). Based on the studies to evaluate the source of HPO3 2–, it appears that the decomposition of organic matter, particularly solids rich in microbial biomass (secondary solids versus primary), is responsible for the elevated concentrations observed and that elevated temperatures increase its production and may prevent its use by dissimilatory phosphite oxidizers. It also helps to explain the previous reports of dissimilatory HPO3 2–-oxidizing bacteria in wastewater treatment systems, particularly digesters, and suggests organic matter decay as a possible source for previously observed HPO3 2– concentrations in sediments. The knowledge of the occurrence and source of HPO3 2– may shed light on its important and hitherto unrecognized role in the global P cycle.
Phosphite, an important part of the global phosphorus cycle, is produced in municipal wastewater treatments primarily from decay of activated sludges, and production is enhanced at elevated temperatures.
Occurrence and Source of Phosphite (HPO3 2–) during Municipal Wastewater Treatments
https://orcid.org/0000-0003-1664-6909
https://orcid.org/0000-0003-4232-4364
The occurrence, fate, and source of phosphite (HPO3 2–), a highly soluble, reduced phosphorus (P) compound that is often overlooked in the P biogeochemical cycle, were investigated in municipal wastewater treatment systems. Wastewater samples were collected from influent wastewater, preprimary and postprimary clarifiers, postaeration basin, postsecondary clarifier, return activated sludge (RAS), final discharge, anaerobic digester influents, and effluents. HPO3 2– was present in wastewater samples but varied depending on the source. Highest concentrations were measured in anaerobic digester influents and effluents (50–60 μg L–1). Based on the studies to evaluate the source of HPO3 2–, it appears that the decomposition of organic matter, particularly solids rich in microbial biomass (secondary solids versus primary), is responsible for the elevated concentrations observed and that elevated temperatures increase its production and may prevent its use by dissimilatory phosphite oxidizers. It also helps to explain the previous reports of dissimilatory HPO3 2–-oxidizing bacteria in wastewater treatment systems, particularly digesters, and suggests organic matter decay as a possible source for previously observed HPO3 2– concentrations in sediments. The knowledge of the occurrence and source of HPO3 2– may shed light on its important and hitherto unrecognized role in the global P cycle.
Phosphite, an important part of the global phosphorus cycle, is produced in municipal wastewater treatments primarily from decay of activated sludges, and production is enhanced at elevated temperatures.
Occurrence and Source of Phosphite (HPO3 2–) during Municipal Wastewater Treatments
https://orcid.org/0000-0003-1664-6909
https://orcid.org/0000-0003-4232-4364
The occurrence, fate, and source of phosphite (HPO3 2–), a highly soluble, reduced phosphorus (P) compound that is often overlooked in the P biogeochemical cycle, were investigated in municipal wastewater treatment systems. Wastewater samples were collected from influent wastewater, preprimary and postprimary clarifiers, postaeration basin, postsecondary clarifier, return activated sludge (RAS), final discharge, anaerobic digester influents, and effluents. HPO3 2– was present in wastewater samples but varied depending on the source. Highest concentrations were measured in anaerobic digester influents and effluents (50–60 μg L–1). Based on the studies to evaluate the source of HPO3 2–, it appears that the decomposition of organic matter, particularly solids rich in microbial biomass (secondary solids versus primary), is responsible for the elevated concentrations observed and that elevated temperatures increase its production and may prevent its use by dissimilatory phosphite oxidizers. It also helps to explain the previous reports of dissimilatory HPO3 2–-oxidizing bacteria in wastewater treatment systems, particularly digesters, and suggests organic matter decay as a possible source for previously observed HPO3 2– concentrations in sediments. The knowledge of the occurrence and source of HPO3 2– may shed light on its important and hitherto unrecognized role in the global P cycle.
Phosphite, an important part of the global phosphorus cycle, is produced in municipal wastewater treatments primarily from decay of activated sludges, and production is enhanced at elevated temperatures.
Occurrence and Source of Phosphite (HPO3 2–) during Municipal Wastewater Treatments
Sadeghi, Sepideh (Autor:in) / Jackson, William Andrew (Autor:in)
ACS ES&T Water ; 4 ; 3332-3339
09.08.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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