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1,649,669 Views • Mar 1, 2022 • Click to toggle off description
The science of sedimentation and the first step of wastewater treatment.

We often use chemicals, filters, and even gigantic colonies of bacteria to clean sewage on such a massive scale, but the first line of defense in the fight against dirty water is usually just gravity.

All the wastewater videos so far:    • Wastewater Management  

Errata: (1) At 6:16, the header should say "ALL PARTICLES SETTLE WHEN tD IS LESS THAN tL."

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Views : 1,649,669
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Date of upload: Mar 1, 2022 ^^


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YouTube Comments - 1,431 Comments

Top Comments of this video!! :3

@PracticalEngineeringChannel

2 years ago

💲Get your first $5,000 managed free by investing with today’s sponsor Wealthfront at www.wealthfront.com/practicalengineering 📖 Big announcement coming later this month. Subscribe to the newsletter here to be the first to hear: practical.engineering/email-list

123 |

@crabmansteve6844

2 years ago

The small scale demonstrations are what set this channel apart from the rest in the beginning. I hope they never go away. I really appreciate the work.

3.1K |

@billiondollardan

2 years ago

When I was a teenager I seriously considered going into wastewater management. I visited to treatment plants and I found the process pretty darn interesting. In the end I picked a job that would pay better, but I sure love clean water

1.9K |

@Gitau_Kenn

2 years ago

As an Environmental Engineer, it's amazing that wastewater treatment is getting the exposure that it deserves. This can go a long way into shaping people's opinion in processes that are crucial in our lives but are oblivious to.

601 |

@RainyDayBricks

2 years ago

My three little boys ( ages 7, 4, and 1) always come running for these waste water videos :) They are fascinated by our small town's sewage treatment plant and are so very disappointed that they don't give tours. These videos have been the next best thing. Thank you for another excellent video.

280 |

@The2Percent

2 years ago

Keep these public works videos coming! I manage a small municipal electric, water, and sewer utility and these videos help me better understand some of the fundamentals that our crews work with on a daily basis.

1K |

@calholli

2 years ago

"A moment of tranquility" Being used to describe sewage settling to the bottom is just not the words I would have used.

115 |

@TheWicho46

2 years ago

I'm a California Grade IV wastewater treatment plant operator and I take pride in what I do. Job security for sure. Excellent presentation you gave. Thank you

84 |

@a.i.9560

2 years ago

My father in law was a pipefitter in Chicago so we got to go to the grand opening of Stickney Treatment plant. They showed and explained the different steps and processes used to separate things then put us on a sludge train. At the end of the line they has a HUGE field/ train yard that the sludge was dump into, then turned several times like compose. They would sell this as fertilizer.

259 |

@dsnodgrass4843

2 years ago

In my specific field we have a wastewater pretreatment process called "metals precipitation" which uses hydrated lime and flocculant to "settle" and separate the metal contamination out so we can release clean water. It also uses a clarifier and at least one "polishing tank" to allow the sludge to descend, and a clear water layer to form and flow out of the plant into the sewer system.

199 |

@hassleoffa

2 years ago

As a student engineer in Toronto, I did a work term co-op at the Queen Street sewage treatment plant. 32 years later I can still smell it when I think about those days. It was a huge factor in choosing to focus on Structural Engineering.

118 |

@wolfielee11

2 years ago

As a non engineer working in the civil engineering world, these videos have been incredibly helpful in understanding not just the process flow but the math behind the processes I see in my day to day.

22 |

@ROMAQHICKS

2 years ago

I work for a municipality in the US and it is amazing how fast water treatment plants can clean water. One of the plants we have can take sewage and turn it into water clean enough to discharge in only about 24 hours; it really surprised me when I was discussing it with our Public Works department. An treatment operator is a good job, I consistently see openings for these positions. Urban areas and water treatment needs are only going to grow.

15 |

@basantprasadsgarden8365

2 years ago

Seeing the water treatment plant in my city, I use to wonder, what those circular pools are Thanks to Practical Engineering for ending my doubt.

85 |

@rob2257

2 years ago

Don't forget belt presses Grady! Thanks for doing this series! My dad was a wastewater plant operator when I was growing up, it was a lot more interesting than people would think, especially when the state would audit them because their lab results showed the effluent exceeded state drinking water standards. . . And then the audit would reveal they WEREN'T falsifying their results! 🤣

64 |

@tokencivilian8507

2 years ago

GF works at one of the Seattle area sewage plants, on the solids side of things. "Polymer" is a big part of getting the solids to separate from the liquids. Once settled out, the solids go to enclosed digesters where the "material" is more or less composted in an anaerobic process. The resulting methane is used to help provide process heat for elsewhere in the plant. Once sufficiently digested, the solids are dewatered (the watery "mud" first goes on a separating belt to let liquid drip out, then into centrifuges to spin out more water) to the consistency of wet soil and shipped to eastern Washington for disposal, er, I mean application as fertilizer on agricultural land. Seattle area folks - if you've ever seen double dump trucks on I-90 with "Loop - turn your dirt around" you now know that is what's left of Seattle's poo.

22 |

@noahlarson1861

2 years ago

I learned engines by working with my dad at a waste water treatment plant. They had 4 big natural gas Cat engines (that we maintained) that turned the blowers to aerated the sewage as it entered the plant. I learned a lot, not only from dad, but from the engineers, operators and chemists at the plant. Really, really cool!

9 |

@StephenGillie

2 years ago

Settlement is often the last step in a legal process too. 😝 Thanks for clarifying about clarifiers.

23 |

@TeddyGun300

2 years ago

Dear Grady, great to hear such a complicated topic presented so easily. I am working in the wwtp field with newest technologies such as electro dialysis, ultrafiltration or reverse osmosis. In case you need contacts to a full scale plant almost everywhere in the world, to shoot videos or do interviews, don't hesitate to drop a comment and I can forward you to some colleagues. Cheers

40 |

@erat91

2 years ago

Taking extremely complex systems and simplifying them is something that you do best with these videos. You did a dang good job explaining the basics of WWT in a 11 minute video. This video could be 30 hours long with how complicated and elaborate water treatment can be.

18 |

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