Heavy metals concentration in sewage treated at the collective wastewater treatment plant
DOI:
https://doi.org/10.24425/jwld.2025.155297Abstract
This paper focuses on the analysis of the concentration of heavy metals in sewage treated at the municipal collective two-stage wastewater treatment plant (WWTP). The quality of raw sewage, mechanically treated sewage and totally treated sewage were tested. Heavy metals concentrations in sewage were in order Zn > Mn > Cu > Ni > Pb > Cr > Cd. A subsequent treatment stages gradually reduced metals concentrations, but the role of a mechanical treatment was not significant. The order of percentage reduction as a result of the total mechanical-biological treatment was Cr > Cd > Zn > Cu > Pb > Ni > Mn, which means that it was not consistent with the order of metals concentrations. It was found that totally treated sewage were characterised by greater variability in metal concentrations than raw sewage and mechanically treated sewage. Among the tested elements, the exception was Mn, with not only the lowest percentage reduction, but also with the most even concentrations level (low or average variability), while Cd and then, Cr, were characterised by the greatest differences in concentrations. Additionally, the following dependence was found: the greater WWTP hydraulic load, the greater heavy metals concentrations. Importantly, sewage met the legal requirements regarding to the permissible levels of heavy metals concentrations.References
Chipasa, K.B. (2003) “Accumulation and fate of selected heavy metals in a biological wastewater treatment system,” Waste Management, 23(2), pp. 135–143. Available at: https://doi.org/10.1016/S0956-053X(02)00065-X.
Das, T.K. and Poater, A. (2021) “Review on the use of heavy metal deposits from water treatment waste towards catalytic chemical syntheses,” International Journal of Molecular Sciences, 22(24), pp. 1–27. Available at: https://doi.org/10.3390/ijms222413383.
Koc-Jurczyk, J. (2013) “Mikrobiologiczne usuwanie metali ciężkich ze ścieków [Microbial removal of heavy metals from wastewater],” Inżynieria Ekologiczna, 34, pp. 166–172. Available at: https://doi.org/10.12912/23920629/330.
Kowalik, R. et al. (2020) “Analysis of the mobility of heavy metals in sludge for the sewage treatment plant in Daleszyce,” Structure and Environment, 12(2), pp. 85–92. Available at: https://doi.org/10.30540/sae-2020-010.
Krupicz, A. and Masłoń, A. (2016) “Zmienność ładunków zanieczyszczeń dopływających do oczyszczalni ścieków w Stalowej Woli [Variability loads of pollutants flowing into the wastewater treatment plant in Stalowa Wola],” Czasopismo Inżynierii Lądowej, Środowiska i Architektury, 33, 63(2/I), pp. 101–114. Available at: http://dx.doi.org/10.7862/rb.2016.113.
Kulbat, E. et al. (2003) “Heavy metals removal in the mechanical-biological wastewater treatment plant “Wschód” in Gdańsk,” Polish Journal of Environmental Studies, 12(5), pp. 635–641.
Mansourri, G. and Madani, M. (2016) “Examination of the level of heavy metals in wastewater of Bandar Abbas wastewater treatment plant,” Open Journal of Ecology, 6(2), pp. 55–61. Available at: http://dx.doi.org/10.4236/oje.2016.62006.
Mikulski, P., Krzywonos, M. and Borowiak, D. (2021) “Usuwanie metali ciężkich ze ścieków za pomocą nanomateriałów węglowych [Removal of heavy metals from wastewater using carbon nanomaterials],” Przemysł Chemiczny, 100(7), pp. 685–688. Available at: http://dx.doi.org/10.15199/62.2021.7.10.
Młyńska, A., Chmielowski, K. and Młyński, D. (2017) “Analiza zmian jakości ścieków w trakcie procesów oczyszczania na oczyszczalni w Przemyślu [The analysis of the changes in the sewage quality during treatment processes on the wastewater treatment plant in Przemyśl],” Inżynieria Ekologiczna, 18(5), pp. 18–26. Available at: https://doi.org/10.12912/23920629/74973.
Młyński, D. et al. (2020) “Investigation of the wastewater treatment plant processes efficiency using statistical tools,” Sustainability, 12(24), pp. 1–16. Available at: https://doi.org/10.3390/su122410522.
Odumbe, E., Murunga, S. and Ndiiri, J. (2023) “Heavy metals in wastewater effluent: causes, effects, and removal technologies,” in D. Joseph (ed.) Trace metals in the environment. IntechOpen. Available at: https://doi.org/10.5772/intechopen.1001452.
Olujimi, O.O. et al. (2012) “Preliminary investigation into occurrence and removal of arsenic, cadmium, mercury, and zinc in wastewater treatment plants in Cape Town and Stellenbosch,” Polish Journal of Environmental Studies, 21(6), pp. 1755–1765.
PN-92/C-04570.01:1992. Woda i ścieki. Badania zawartości metali ciężkich metodą absorpcyjnej spektrofotometrii atomowej. Oznaczanie cynku, miedzi, ołowiu i kadmu bez wstępnego zagęszczenia [Water and sewage. Testing of heavy metals content by atomic absorption spectrometry. Determination of zinc, copper, lead and cadmium without pre-concentration]. Warszawa: Polski Komitet Normalizacyjny.
PN-EN ISO 15586:2005. Jakość wody – Oznaczanie pierwiastków śladowych metodą atomowej spektrometrii absorpcyjnej z piecem grafitowym [Water quality – Determination of trace elements using atomic absorption spectrometry with graphite furnace]. Warszawa: Polski Komitet Normalizacyjny.
PN-ISO 8288:2002. Jakość wody – Oznaczanie kobaltu, niklu, miedzi, cynku, kadmu i ołowiu – Metody atomowej spektrometrii absorpcyjnej z atomizacją w płomieniu [Water quality – Determination of cobalt, nickel, copper, zinc, cadmium and lead – Flame atomic absorption spectrometric methods]. Warszawa: Polski Komitet Normalizacyjny.
Qasem, N.A.A., Mohammed, R.H. and Lawal, D.U. (2021) “Removal of heavy metal ions from wastewater: a comprehensive and critical review,” npj Clean Water, 4, pp. 1–15. Available at: https://doi.org/10.1038/s41545-021-00127-0.
Rozporządzenie (2019) “Rozporządzenie Ministra Gospodarki Morskiej i Żeglugi Śródlądowej z dnia 12 lipca 2019 r. w sprawie substancji szczególnie szkodliwych dla środowiska wodnego oraz warunków, jakie należy spełnić przy wprowadzaniu do wód lub do ziemi ścieków, a także przy odprowadzaniu wód opadowych lub roztopowych do wód lub do urządzeń wodnych [Regulation of the Minister of Maritime Economy and Inland Navigation of 12 July 2019 on substances particularly harmful to the aquatic environment and conditions to be met during sewage discharge into the water or into the ground and during rainwater or snowmelt discharge into the water or into the water devices],” Dz.U. 2019 poz. 1311.
Sakson, G., Brzezinska, A. and Zawilski, M. (2018) “Emission of heavy metals from an urban catchment into receiving water and possibility of its limitation on the example of Lodz city,” Environmental Monitoring and Assessment, 190, pp. 1–15. Available at: https://doi.org/10.1007/s10661-018-6648-9.
Szczerbińska, N. et al. (2018) “Ocena skuteczności pracy oczyszczalni ścieków w Gryfinie [Efficiency of sewage treatment plant in Gryfino],” Woda-Środowisko-Obszary Wiejskie, 18(2), pp. 85–98.
Szymański, K., Janowska, B. and Jastrzębski, P. (2011) “Heavy metal compounds in wastewater and sewage sludge,” Rocznik Ochrona Środowiska, 13(1), pp. 83–100.
Tytła, M., Widziewicz, K. and Zielewicz, E. (2016) “Heavy metals and its chemical speciation in sewage sludge at different stages of processing,” Environmental Technology, 37(7), pp. 899–908. Available at: https://doi.org/10.1080/09593330.2015.1090482.
Tytła, M. and Widziewicz-Rzońca, K. (2021) “Heavy metals in municipal sewage sludge – a brief characteristic of potential threats and methods used to assess the ecological risk,” Environment, Earth and Ecology, 5(1), pp. 18–25. Available at: https://doi.org/10.24051/eee/134276.
