A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Particle balance and return loops for microplastics in a tertiary-level wastewater treatment plant (2021)
Salmi, P., Ryymin, K., Karjalainen, A. K., Mikola, A., Uurasjärvi, E., & Talvitie, J. (2021). Particle balance and return loops for microplastics in a tertiary-level wastewater treatment plant. Water Science and Technology, 84(1), 89-100. https://doi.org/10.2166/wst.2021.209
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Salmi, Pauliina; Ryymin, Kalle; Karjalainen, Anna K.; Mikola, Anna; Uurasjärvi, Emilia; Talvitie, Julia
Lehti tai sarja: Water Science and Technology
ISSN: 0273-1223
eISSN: 1996-9732
Julkaisuvuosi: 2021
Ilmestymispäivä: 31.05.2021
Volyymi: 84
Lehden numero: 1
Artikkelin sivunumerot: 89-100
Kustantaja: IWA Publishing
Julkaisumaa: Britannia
Julkaisun kieli: englanti
DOI: https://doi.org/10.2166/wst.2021.209
Linkki tutkimusaineistoon: http://urn.fi/URN:NBN:fi:jyu-202009035741
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/76137
Tiivistelmä
Microplastics (MPs) from households, stormwater, and various industries are transported to wastewater treatment plants (WWTPs), where a high proportion of them are captured before discharging their residuals to watersheds. Although recent studies have indicated that the removed MPs are mainly retained in wastewater sludge, sludge treatment processes have gained less attention in MP research than water streams at primary, secondary, and tertiary treatments. In this study, we sampled twelve different process steps in a tertiary-level municipal WWTP in central Finland. Our results showed that, compared to the plant influent load, three times more MPs circulated via reject water from the sludge centrifugation back to the beginning of the treatment process. Especially fibrous MPs were abundant in the dewatered sludge, whereas fragment-like MPs were observed in an aqueous stream. We concluded that, compared to the tertiary effluent, sludge treatment is the major exit route for MPs into the environment, but sludge treatment is also a return loop to the beginning of the process. Our sampling campaign also demonstrated that WWTPs with varying hydraulic conditions (such as the one studied here) benefit from disc filter–based tertiary treatments in MP removal.
YSO-asiasanat: vedenpuhdistus; jäteveden käsittely; mikroroskat; jätevesiliete; jätevedenpuhdistamot
Vapaat asiasanat: enzymatic purification; microplastics; reject water; return loop; wastewater sludge
Liittyvät organisaatiot
Liittyvät tutkimusaineistot
OKM-raportointi: Kyllä
VIRTA-lähetysvuosi: 2021
JUFO-taso: 1