Effect of Wastewater Treatment Efficiency on River Ecosystem Sustainability
DOI:
https://doi.org/10.70716/reswara.v2i2.392Keywords:
wastewater treatment efficiency, river ecosystem sustainability, nutrient loading, aquatic biodiversity, water qualityAbstract
Wastewater treatment plants (WWTPs) play a crucial role in controlling pollutant discharges into river systems, thereby influencing river ecosystem sustainability. However, increasing evidence suggests that conventional and even advanced wastewater treatment processes may not fully mitigate ecological impacts on receiving waters. This study aims to synthesize and critically analyze global scientific evidence on the effects of wastewater treatment efficiency on river ecosystem sustainability, focusing on physicochemical, biological, and metabolic responses. A systematic literature-based research design was employed, analyzing 30 peer-reviewed journal articles, conference proceedings, and preprints published between 2016 and 2024. The reviewed studies reveal that enhanced wastewater treatment efficiency significantly improves water quality, reduces nutrient and micropollutant loads, stabilizes ecosystem metabolism, and supports biodiversity recovery. Nevertheless, residual contaminants, altered flow regimes, and nutrient imbalances persist, leading to changes in microbial communities, food web dynamics, and fish assemblages. The findings indicate that while improved wastewater treatment is essential for achieving river sustainability, current treatment targets remain insufficient in many regions. This study highlights the need for integrated wastewater management strategies that combine advanced treatment technologies, ecological flow considerations, and watershed-scale planning to ensure long-term river ecosystem resilience.
References
Almeida, P., Albuquerque, T. V., Antunes, M., et al. (2021). Effects of wastewater treatment plant's discharges on a freshwater ecosystem—a case study on the Ramalhoso River (Portugal). Water, Air, & Soil Pollution, 232(5). https://doi.org/10.1007/S11270-021-05131-1
Ansa, E. D. O., Boateng, E., & Ackon, S. (2017). Microbial removal efficiency of a natural wastewater treatment system and the impact of its effluent on receiving waters. Ghana Journal of Science, 57, 1–12. https://doi.org/10.4314/GJS.V57I0
Arroita, M., Elosegi, A., et al. (2019). Twenty years of daily metabolism show riverine recovery following sewage abatement. Limnology and Oceanography, 64(1), 69–82. https://doi.org/10.1002/LNO.11053
Battaglin, W. A., Bradley, P. M., Weissinger, R. H., et al. (2023). Changes in chemical occurrence, concentration, and bioactivity in the Colorado River before and after replacement of the Moab, Utah wastewater treatment plant. Science of the Total Environment, 879, 166231. https://doi.org/10.1016/j.scitotenv.2023.166231
Buzzella, M. M., Albertin, K., Kreutzberger, W., et al. (2016). Assessment of the influence of wastewater control options on Tietê River water quality. WIT Transactions on Ecology and the Environment, 216, 221–232. https://doi.org/10.2495/WP160221
Dai, D., & Alamanos, A. (2024). Modeling the impact of land use changes and wastewater treatment on water quality and ecosystem services in the Yongding River Basin, North China. Water, 16(12), 1701. https://doi.org/10.3390/w16121701
Di Prinzio, C. Y., Andrade-Muñoz, A. S., Assef, Y. A., et al. (2024). Impact of treated effluent discharges on fish communities: Evaluating the effects of pollution on fish distribution, abundance and environmental integrity. Science of the Total Environment, 901, 170237. https://doi.org/10.1016/j.scitotenv.2024.170237
Faunce, K. E., Barber, L. B., Keefe, S. H., et al. (2023). Wastewater reuse and predicted ecological risk posed by contaminant mixtures in Potomac River watershed streams. Journal of the American Water Resources Association, 59(2), 1–15. https://doi.org/10.1111/1752-1688.13110
Guzmán, I. de, Elosegi, A., von Schiller, D., et al. (2024). Treated and highly diluted wastewater impacts diversity and energy fluxes of freshwater food webs. Preprint. https://doi.org/10.22541/au.170670097.79679980/v1
Hamdhani, H., Eppehimer, D. E., & Bogan, M. T. (2020). Release of treated effluent into streams: A global review of ecological impacts with a consideration of its potential use for environmental flows. Freshwater Biology, 65(9), 1657–1676. https://doi.org/10.1111/FWB.13519
Hoffmann, C., Mallard, G., Dark, K., et al. (2022). Surface water quality under the Sustainable Development Agenda – the role of improved wastewater treatment. EGUsphere. https://doi.org/10.5194/egusphere-egu22-3599
Huang, J., Yin, H., et al. (2019). Limited nitrogen retention in an urban river receiving raw sewage and wastewater treatment plant effluent. Environmental Science: Processes & Impacts, 21(9), 15–27. https://doi.org/10.1039/C9EM00201D
Jarvie, H. J., Macrae, M. L., Anderson, M., et al. (2022). River metabolic fingerprints and regimes reveal ecosystem responses to enhanced wastewater treatment. Journal of Environmental Quality, 51(4), 1–14. https://doi.org/10.1002/jeq2.20401
Jones, E. R., Bierkens, M. F. P., Wanders, N., et al. (2022). Current wastewater treatment targets are insufficient to protect surface water quality. Communications Earth & Environment, 3, 1–10. https://doi.org/10.1038/s43247-022-00554-y
Kienle, C., Vermeirssen, E. L. M., Schifferli, A., et al. (2019). Effects of treated wastewater on the ecotoxicity of small streams. PLOS ONE, 14(12), e0226278. https://doi.org/10.1371/journal.pone.0226278
Kim, S., & Chung, S.-W. (2022). Causal impact analysis of enhanced phosphorus effluent standard on river water quality. SSRN Electronic Journal. https://doi.org/10.2139/ssrn.4127249
Kuok, K. K., Chiu, P. C., Rahman, M. R., et al. (2022). Effectiveness of centralized wastewater treatment plant in removing emerging contaminants: A case study at Kuching, Malaysia. Journal of Water Resource and Protection, 14(9), 1–12. https://doi.org/10.4236/jwarp.2022.149034
Ledford, S. H., & Toran, L. (2020). Downstream evolution of wastewater treatment plant nutrient signals using high-temporal monitoring. Hydrological Processes, 34(6), 1–11. https://doi.org/10.1002/HYP.13640
Li, B., Wang, D., Li, M., et al. (2016). Technical performance and environmental effects of the treated effluent of wastewater treatment plants in the Shenzhen Bay Catchment, China. Sustainability, 8(10), 984. https://doi.org/10.3390/SU8100984
Mortensen, J. G., González-Pinzón, R., & Dahm, C. N. (2016). Advancing the food–energy–water nexus: Closing nutrient loops in arid river corridors. Environmental Science & Technology, 50(16), 8485–8496. https://doi.org/10.1021/ACS.EST.6B01351
Neverova-Dziopak, E. (2018). Towards a sustainable approach to wastewater treatment strategy for eutrophication abatement. E3S Web of Conferences, 45, 00056. https://doi.org/10.1051/E3SCONF/20184500056
Takács, P., Balogh, E., & Erős, T. (2016). Stabilizing effect of WWTP discharge on water quality and fish assemblage structure. Environmental Engineering and Management Journal, 15(7), 1–10. https://doi.org/10.30638/EEMJ.2016.168
Trejos Delgado, C., Dombrowski, A., & Oehlmann, J. (2024). Assessing the impact of two conventional wastewater treatment plants on small streams with effect-based methods. PeerJ, 12, e17326. https://doi.org/10.7717/peerj.17326
Triebskorn, R., Blaha, L., Gallert, C., et al. (2019). Freshwater ecosystems profit from activated carbon-based wastewater treatment across various levels of biological organisation. Environmental Sciences Europe, 31(1), 1–20. https://doi.org/10.1186/S12302-019-0267-0
Wang, X., Daigger, G. T., et al. (2018). Evolving wastewater infrastructure paradigm to enhance harmony with nature. Science Advances, 4(8), eaaq0210. https://doi.org/10.1126/SCIADV.AAQ0210
Zhang, Y., Huo, Y., Zhang, Z., et al. (2024). Wastewater deterministically impacts the composition and assembly of planktonic microorganisms in the river ecosystem. ACS ES&T Water. https://doi.org/10.1021/acsestwater.3c00373
Zhang, X., Wang, Y., Li, J., et al. (2024). Emergy-based evaluation of Xiaolangdi Reservoir’s impact on the ecosystem health and services of the Lower Yellow River. Sustainability, 16(20), 8857. https://doi.org/10.3390/su16208857
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Copyright (c) 2026 Rina Kartikasari, Maria L. Rodriguez , Kenji Nakamura (Author)
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