Integrating reverse osmosis to a conventional river water treatment plant as a strategy to produce drinking water after mining dam rupture events: a case study

Incidents of mining dam failure have compromised the water quality, threatening the water supply. Different strategies are sought to restore the impacted area and to guarantee the water supply. One example is water treatment plants that treat high-polluted waters within the required limits for their...

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Published in:Environmental technology 2024-03, p.1-12
Main Authors: Moreira, Victor Rezende, Moser, Priscila B, Guimarães, Roberta N, Xavier, Cecílio, Fidelis, Carolina, Silva, Ana Flávia R, Grossi, Luiza B, Faria, Clara V, Santos, Lucilaine V S, Amaral, Míriam C S
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container_title Environmental technology
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creator Moreira, Victor Rezende
Moser, Priscila B
Guimarães, Roberta N
Xavier, Cecílio
Fidelis, Carolina
Silva, Ana Flávia R
Grossi, Luiza B
Faria, Clara V
Santos, Lucilaine V S
Amaral, Míriam C S
description Incidents of mining dam failure have compromised the water quality, threatening the water supply. Different strategies are sought to restore the impacted area and to guarantee the water supply. One example is water treatment plants that treat high-polluted waters within the required limits for their multiple usages. The current study assesses the integration of reverse osmosis (RO) to a river water treatment plant (RWTP) installed in Brumadinho (Minas Gerais, Brazil) to treat the water from the Ferro-Carvão stream impacted by the B1 dam rupture in 2019. The RWTP started eleven months after the mining dam rupture and is equipped with eight coagulation-flocculation tanks followed by eight pressurised filters. A pilot RO plant was installed to polish the water treated by the RWTP. Water samples were collected at different points of the water treatment plant and were characterised by their physical, chemical, and biological parameters (160 in total). The results were compared with the historical data (1997-2022) to reveal the alterations in the water quality after the rupture event. The compliance with both parameters was only achieved after the RO treatment, which acted as an additional barrier to 30 contaminants. The water quality indexes (WQI) suggested that the raw surface water, even eleven months after the incident, was unfit for consumption (WQI: 133.9) whereas the reverse osmosis permeate was ranked as excellent in the rating grid (WQI: 23.7).
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title Integrating reverse osmosis to a conventional river water treatment plant as a strategy to produce drinking water after mining dam rupture events: a case study
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