Feasibility and Environmental Impact of NOM Reduction by Microfiltration at a Finnish Surface Water Treatment Plant

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-05
Major/Subject
Mcode
Degree programme
Language
en
Pages
14
Series
Water (Switzerland), Volume 15, issue 10
Abstract
Low-pressure membranes (including microfiltration and ultrafiltration) for natural organic matter removal in drinking water treatment have gained increasing interest in the Nordic countries. Microfiltration can produce stable water quality and requires less space than conventional treatment. Hollow fibre microfiltration coupled with chemical coagulation was tested at a Finnish surface water treatment plant to study its feasibility and environmental impact compared to clarification, rapid sand filtration and ozonation. Microfiltration improved both physical and chemical water quality, while natural organic matter removal was similar to that of conventional treatment. Membrane treatment would increase operational costs by 2.5–3.5 euro cents per m3. Most of the costs derive from chemicals used in membrane cleaning. Membrane treatment is an energy-intensive process, but energy production in the Nordic countries has a low emission factor. Greenhouse gas emissions from operating microfiltration are estimated at 16 g CO2-eq./m3 of permeate. Lowering chemical consumption and using renewable energy in production could decrease total emissions.
Description
Funding Information: This study received no external funding. Publisher Copyright: © 2023 by the authors.
Keywords
drinking water treatment, environmental impact, microfiltration, natural organic matter, retrofit, surface water
Other note
Citation
Laurell , P , Poutanen , H , Hesampour , M , Tuutijärvi , T & Vahala , R 2023 , ' Feasibility and Environmental Impact of NOM Reduction by Microfiltration at a Finnish Surface Water Treatment Plant ' , Water (Switzerland) , vol. 15 , no. 10 , 1822 . https://doi.org/10.3390/w15101822