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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
    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
    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 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 recording data at public works control center — Stock Photo
    Engineer recording data at public works control center
    Water treatment engineer in treatment room — Stock Photo
    Water treatment engineer in treatment room
    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
    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
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Indoors view of Pipeline in a water treatment plant — Stock Photo
    Indoors view of Pipeline in a water treatment plant
    Lab chemist placing paper filter for sample testing — Stock Photo
    Lab chemist placing paper filter for sample testing
    Indoors view of Pumps in a water treatment plant — Stock Photo
    Indoors view of Pumps in a 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
    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
    Pieces of fresh green Aloe Vera on white background — Stock Photo
    Pieces of fresh green Aloe Vera on white background
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in 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
    Close-up view of sediments on rocks in Riotinto, Huelva — Stock Photo
    Close-up view of sediments on rocks in Riotinto, Huelva
    Engineer polishing O2 electrochemical sensor probe in laboratory — Stock Photo
    Engineer polishing O2 electrochemical sensor probe in laboratory
    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
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Lab technician collecting data on sterilization — Stock Photo
    Lab technician collecting data on sterilization
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    Lab chemist collecting a small amount of liquid with a dropper — Stock Photo
    Lab chemist collecting a small amount of liquid with a dropper
    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
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in 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
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    Sludge lines in a water treatment plant — Stock Photo
    Sludge lines in a water treatment plant
    Lab chemist preparing graduated cylinder for standard solution — Stock Photo
    Lab chemist preparing graduated cylinder for standard solution
    Indoors view of Pressure gauges in a water treatment plant — Stock Photo
    Indoors view of Pressure gauges 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 picking up samples — Stock Photo
    Lab technician picking up samples
    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
    Aloe vera gel and fresh aloe leaf — Stock Photo
    Aloe vera gel and fresh aloe leaf
    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 reagent to sample while measuring pH — Stock Photo
    Lab technician adding reagent to sample while measuring pH
    Satellite dish and power transmission towers — Stock Photo
    Satellite dish and power transmission towers
    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
    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 Pressure gauges in a water treatment plant — Stock Photo
    Indoors view of Pressure gauges in a water treatment plant
    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
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    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
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Lab technician adding liquid to graduated cylinder — Stock Photo
    Lab technician adding liquid to graduated cylinder
    Outdoors view of Sludge thickeners in a water treatment plant — Stock Photo
    Outdoors view of Sludge thickeners in a water treatment plant
    Digester tanks in a water treatment plant — Stock Photo
    Digester tanks in a water treatment plant
    Lab chemist handling water sample — Stock Photo
    Lab chemist handling water sample
    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
    Indoors view of Sludge lines in a water treatment plant — Stock Photo
    Indoors view of Sludge lines 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 light background. — Stock Photo
    Pieces of fresh green Aloe Vera with white flesh on light background.