It is baffling how major metro areas like Lost Angeles has millions of poopers but there is almost no evidence of poop treatment facilities. Flying into/out of LAX and Burbank I look for those large squat open cylinders aerating wastewater but I never see them.
I imagine a 20 mile stretch of a 10 foot diameter underwater pipe sending all that treated poop water into the Pacific - but wouldnt that area be populated by tons of bacteria? Modern marvels of engineering!
FeCl is a Flocculant used to precipitate solids from the waste stream.
or it’s pumped directly to CNN
It’s used in both Water Treatment and Wastewater Treatment as part of the Flocculation Stage. It attracts and attaches to the Solids and gets heavier until the Solids sink to the bottom of the Flocculation Chamber removing the bulk of the Solids. The Water/Wastewater then moves to the next stage of treatment where other chemicals (such as Chlorine and Polymers) are introduced as the Water goes to the Filtration Stage in a Conventional Plant or the Membrane Filters in the newer Plants.
The next stage is final disinfectant (Chlorine or Chloramines) and some Plants use Ozone and/or Ultraviolet and then final disinfectant of Chlorine or Chloramines to meet EPA or State requirements. Some States have stricter than EPA standards such as Texas and Kookafornia.
The most used Coagulants are Ferric Sulfide (iron) and Alum or Copper Sulfate.
The Polymers are a proprietary blend and the recipes are closely guarded by the Chemical Companies with some being Positive and some Negative charged to deal with different solids.
Chlorine or Chloramines (a mixture of Chlorine and Ammonia) for final and distribution system disinfectant residual.
I hope this answers Your questions.
Thank You for the Ping Sir Chode.