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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
    Security boat patrolling public water supply — Stock Photo
    Security boat patrolling public water supply
    Lab technician recording data from sample test — Stock Photo
    Lab technician recording data from sample test
    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.
    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.
    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
    Indoors view of Pressure gauges in a water treatment plant — Stock Photo
    Indoors view of Pressure gauges in a 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
    Pieces of fresh green Aloe Vera on white background — Stock Photo
    Pieces of fresh green Aloe Vera on white background
    One engineer on computer starting up the water treatment plant in program for supervisory control and data acquisition — Stock Photo
    One engineer on computer starting up the water treatment plant in program for supervisory control and data acquisition
    Water treatment plant ultraviolet ionization treatment room — Stock Photo
    Water treatment plant ultraviolet ionization treatment room
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    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
    Indoors view of Pipeline in a water treatment plant — Stock Photo
    Indoors view of Pipeline in a water treatment plant
    Lab technician collecting data on sterilization — Stock Photo
    Lab technician collecting data on sterilization
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    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
    Engineer recording data at public works control center — Stock Photo
    Engineer recording data at public works control center
    Close-up view of sediments on rocks in Riotinto, Huelva — Stock Photo
    Close-up view of sediments on rocks in Riotinto, Huelva
    Engineer rebuilding an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer rebuilding an O2 electrochemical sensor probe in a laboratory
    Outdoors view of Sludge thickeners in a water treatment plant — Stock Photo
    Outdoors view of Sludge thickeners in a water treatment plant
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines 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
    Lab technician adding liquid to graduated cylinder — Stock Photo
    Lab technician adding liquid to graduated cylinder
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    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
    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
    Lab chemist placing a sample slide on a microscope stage — Stock Photo
    Lab chemist placing a sample slide on a microscope stage
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Lab technician removing sample vial cap — Stock Photo
    Lab technician removing sample vial cap
    Indoors view of Sludge lines in a water treatment plant — Stock Photo
    Indoors view of Sludge lines in a water treatment plant
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Pieces of fresh green Aloe Vera with white flesh in glass bowl — Stock Photo
    Pieces of fresh green Aloe Vera with white flesh in glass bowl
    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
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks 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
    Indoors view of Sludge lines in a water treatment plant — Stock Photo
    Indoors view of Sludge lines in a water treatment plant
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Lab technician holding sample in flame — Stock Photo
    Lab technician holding sample in flame
    Solar panels at water treatment plant in Turner Valley, Alberta, Canada. — Stock Photo
    Solar panels at water treatment plant in Turner Valley, Alberta, Canada.
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Lab chemist placing paper filter for sample testing — Stock Photo
    Lab chemist placing paper filter for sample testing
    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
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Woman holding a glass of water — Stock Photo
    Woman holding a glass of water
    Engineer walking by water treatment plant ultraviolet ionization treatment room — Stock Photo
    Engineer walking by water treatment plant ultraviolet ionization treatment room
    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
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Lab chemist preparing graduated cylinder for standard solution — Stock Photo
    Lab chemist preparing graduated cylinder for standard solution
    Engineer polishing O2 electrochemical sensor probe in laboratory — Stock Photo
    Engineer polishing O2 electrochemical sensor probe in laboratory
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines 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
    Lab technician holding tray of calibrated samples — Stock Photo
    Lab technician holding tray of calibrated samples
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Lab technician picking up samples — Stock Photo
    Lab technician picking up samples
    Indoors view of Pipeline in a water treatment plant — Stock Photo
    Indoors view of Pipeline in a water treatment plant
    Lab chemist preparing automated water test — Stock Photo
    Lab chemist preparing automated water test