Treating Water

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In an ongoing series, Practical Engineering is looking at how civil engineers deal with sewage and wastewater. In this video, Grady looks at how wastewater gets treated to remove contaminants. Where possible, engineers use gravity to do this job, building infrastructure that slows the flow down and lets gravity make heavier particles settle out. Of course, sometimes gravity alone doesn’t act quickly enough, in which case engineers use a little extra help in the form of chemicals that can neutralize particles’ electric charge and help them clump together and settle faster. Check out the full video for a tour of how wastewater gets processed. (Image and video credit: Practical Engineering)

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