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    Africa, Burkina Faso, Ziga region, use of drinking water at the water treatment plant of Ziga — Stock Photo
    Africa, Burkina Faso, Ziga region, use of drinking water at the water treatment plant of Ziga
    Laboratory scientist adding a small amount of solid reagent to a container on a scale — Stock Photo
    Laboratory scientist adding a small amount of solid reagent to a container on a scale
    Engineer recording data at public works control center — Stock Photo
    Engineer recording data at public works control center
    Security boat patrolling public water supply — Stock Photo
    Security boat patrolling public water supply
    Engineer connecting O2 electrochemical sensor probe cable to meter in water treatment plant — Stock Photo
    Engineer connecting O2 electrochemical sensor probe cable to meter in water treatment plant
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    Water treatment engineer in treatment room — Stock Photo
    Water treatment engineer in treatment room
    Solar panels at water treatment plant in Turner Valley, Alberta, Canada. — Stock Photo
    Solar panels at water treatment plant in Turner Valley, Alberta, Canada.
    Lab chemist collecting a small amount of liquid with a dropper — Stock Photo
    Lab chemist collecting a small amount of liquid with a dropper
    Close-up view of Osmanthus tea in bowl and glass teapot on tray — Stock Photo
    Close-up view of Osmanthus tea in bowl and glass teapot on tray
    Lab chemist capturing a digital image of a sample slide on a microscope — Stock Photo
    Lab chemist capturing a digital image of a sample slide on a microscope
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Two engineers on computers starting up the water treatment plant in program for supervisory control and data acquisition — Stock Photo
    Two engineers on computers starting up the water treatment plant in program for supervisory control and data acquisition
    Indoors view of Pipeline in a water treatment plant — Stock Photo
    Indoors view of Pipeline in a water treatment plant
    Engineer rebuilding an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer rebuilding an O2 electrochemical sensor probe in a laboratory
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Sludge thickeners in a water treatment plant — Stock Photo
    Sludge thickeners in a water treatment plant
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Pieces of Aloe Vera and refreshing drink served in glass jug on the table. — Stock Photo
    Pieces of Aloe Vera and refreshing drink served in glass jug on the table.
    Pieces of fresh green Aloe Vera with white flesh on light background. — Stock Photo
    Pieces of fresh green Aloe Vera with white flesh on light background.
    Outdoors view of Sludge thickeners in a water treatment plant — Stock Photo
    Outdoors view of Sludge thickeners in a water treatment plant
    Close-up view of sediments on rocks in Riotinto, Huelva — Stock Photo
    Close-up view of sediments on rocks in Riotinto, Huelva
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Lab chemist placing a sample slide on a microscope stage — Stock Photo
    Lab chemist placing a sample slide on a microscope stage
    Indoors view of Pipeline in a water treatment plant — Stock Photo
    Indoors view of Pipeline in a water treatment plant
    Close-up view of Osmanthus tea in bowl and glass teapot on tray — Stock Photo
    Close-up view of Osmanthus tea in bowl and glass teapot on tray
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Lab technician picking up samples — Stock Photo
    Lab technician picking up samples
    Pieces of fresh green Aloe Vera in row on white background — Stock Photo
    Pieces of fresh green Aloe Vera in row on white background
    Indoors view of Pipeline in a water treatment plant — Stock Photo
    Indoors view of Pipeline in a water treatment plant
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Pieces of fresh green Aloe Vera in row on white background — Stock Photo
    Pieces of fresh green Aloe Vera in row on white background
    Lab chemist placing paper filter for sample testing — Stock Photo
    Lab chemist placing paper filter for sample testing
    Lab chemist preparing automated water test — Stock Photo
    Lab chemist preparing automated water test
    Two engineers on service boat preparing to take water samples from public water supply — Stock Photo
    Two engineers on service boat preparing to take water samples from public water supply
    Lab technician recording data from sample test — Stock Photo
    Lab technician recording data from sample test
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    Indoors view of Sludge lines in a water treatment plant — Stock Photo
    Indoors view of Sludge lines in a water treatment plant
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Lab technician adding liquid from graduated cylinder to beaker — Stock Photo
    Lab technician adding liquid from graduated cylinder to beaker
    Lab technician holding tray of calibrated samples — Stock Photo
    Lab technician holding tray of calibrated samples
    Industrial valves and a motor in a sludge digester — Stock Photo
    Industrial valves and a motor in a sludge digester
    Indoors view of Pipeline in a water treatment plant — Stock Photo
    Indoors view of Pipeline in a water treatment plant
    Indoors view of Pipeline in a water treatment plant — Stock Photo
    Indoors view of Pipeline in a water treatment plant
    Pieces of fresh green Aloe Vera on white background — Stock Photo
    Pieces of fresh green Aloe Vera on white background
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory
    Lab technician using flame test probe to gather sample from vile — Stock Photo
    Lab technician using flame test probe to gather sample from vile
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Lab technician adding reagent to sample while measuring pH — Stock Photo
    Lab technician adding reagent to sample while measuring pH
    Lab technician adding liquid to graduated cylinder — Stock Photo
    Lab technician adding liquid to graduated cylinder
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    Lab technician igniting Bunsen burner — Stock Photo
    Lab technician igniting Bunsen burner
    Engineer polishing O2 electrochemical sensor probe in laboratory — Stock Photo
    Engineer polishing O2 electrochemical sensor probe in laboratory