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Treatment of Arctic wastewater by chemical coagulation, UV and peracetic acid disinfection.

https://arctichealth.org/en/permalink/ahliterature297769
Source
Environ Sci Pollut Res Int. 2018 Nov; 25(33):32851-32859
Publication Type
Journal Article
Date
Nov-2018
Author
Ravi Kumar Chhetri
Ewa Klupsch
Henrik Rasmus Andersen
Pernille Erland Jensen
Author Affiliation
Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800, Kgs. Lyngby, Denmark.
Source
Environ Sci Pollut Res Int. 2018 Nov; 25(33):32851-32859
Date
Nov-2018
Language
English
Publication Type
Journal Article
Keywords
Arctic Regions
Bacteria - drug effects - radiation effects
Denmark
Disinfectants - chemistry - pharmacology
Disinfection - methods
Enterococcus - drug effects - radiation effects
Escherichia coli - drug effects - radiation effects
Greenland
Heterotrophic Processes
Peracetic Acid - chemistry - pharmacology
Ultraviolet Rays
Waste Disposal, Fluid - methods
Waste Water - microbiology
Abstract
Conventional wastewater treatment is challenging in the Arctic region due to the cold climate and scattered population. Thus, no wastewater treatment plant exists in Greenland, and raw wastewater is discharged directly to nearby waterbodies without treatment. We investigated the efficiency of physicochemical wastewater treatment, in Kangerlussuaq, Greenland. Raw wastewater from Kangerlussuaq was treated by chemical coagulation and UV disinfection. By applying 7.5 mg Al/L polyaluminium chloride (PAX XL100), 73% of turbidity and 28% phosphate was removed from raw wastewater. E. coli and Enterococcus were removed by 4 and 2.5 log, respectively, when UV irradiation of 0.70 kWh/m3 was applied to coagulated wastewater. Furthermore, coagulated raw wastewater in Denmark, which has a chemical quality similar to Greenlandic wastewater, was disinfected by peracetic acid or UV irradiation. Removal of heterotrophic bacteria by applying 6 and 12 mg/L peracetic acid was 2.8 and 3.1 log, respectively. Similarly, removal of heterotrophic bacteria by applying 0.21 and 2.10 kWh/m3 for UV irradiation was 2.1 and greater than 4 log, respectively. Physicochemical treatment of raw wastewater followed by UV irradiation and/or peracetic acid disinfection showed the potential for treatment of arctic wastewater.
PubMed ID
28210951 View in PubMed
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