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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
    Engineer recording data at public works control center — Stock Photo
    Engineer recording data at public works control center
    Engineer polishing O2 electrochemical sensor probe in laboratory — Stock Photo
    Engineer polishing O2 electrochemical sensor probe in laboratory
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Indoors view of Pumps in a water treatment plant — Stock Photo
    Indoors view of Pumps in a water treatment plant
    Lab technician holding sample in flame — Stock Photo
    Lab technician holding sample in flame
    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
    Satellite dish and power transmission towers — Stock Photo
    Satellite dish and power transmission towers
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    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
    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
    Engineer rebuilding an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer rebuilding 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
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    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
    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
    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
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    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
    Water treatment plant ultraviolet ionization treatment room — Stock Photo
    Water treatment plant ultraviolet ionization treatment room
    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 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 with white flesh on wooden spoon — Stock Photo
    Pieces of fresh green Aloe Vera with white flesh on wooden spoon
    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
    Security boat patrolling public water supply — Stock Photo
    Security boat patrolling public water supply
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    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
    Lab chemist placing a sample slide on a microscope stage — Stock Photo
    Lab chemist placing a sample slide on a microscope stage
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Lab chemist collecting a small amount of liquid with a dropper — Stock Photo
    Lab chemist collecting a small amount of liquid with a dropper
    Lab chemist preparing graduated cylinder for standard solution — Stock Photo
    Lab chemist preparing graduated cylinder for standard solution
    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.
    Lab technician adding liquid to graduated cylinder — Stock Photo
    Lab technician adding liquid to graduated cylinder
    Indoors view of Pressure gauges in a water treatment plant — Stock Photo
    Indoors view of Pressure gauges in a water treatment plant
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Indoors view of Pressure gauges in a water treatment plant — Stock Photo
    Indoors view of Pressure gauges in a water treatment plant
    Water treatment engineer in treatment room — Stock Photo
    Water treatment engineer in treatment room
    Lab chemist placing paper filter for sample testing — Stock Photo
    Lab chemist placing paper filter for sample testing
    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 technician removing sample vial cap — Stock Photo
    Lab technician removing sample vial cap
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Pieces of fresh green Aloe Vera in row on white background — Stock Photo
    Pieces of fresh green Aloe Vera in row on white background
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines 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
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks 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 from graduated cylinder to beaker — Stock Photo
    Lab technician adding liquid from graduated cylinder to beaker
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    Lab technician picking up samples — Stock Photo
    Lab technician picking up samples
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    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
    Lab technician adding reagent to sample while measuring pH — Stock Photo
    Lab technician adding reagent to sample while measuring pH
    Lab technician igniting Bunsen burner — Stock Photo
    Lab technician igniting Bunsen burner
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant