00:00You believe a wastewater treatment plant can turn black, foul-smelling sewage clear with just one spoonful of milky-white
00:05chemical?
00:06It's gently poured into the tank.
00:07The surface instantly reacts.
00:09Foam erupts and churns like boiling water, then quickly disappears within seconds.
00:13This isn't about growing bacteria.
00:14It's a core step in the purification process.
00:17Inside the tank, the water changes fast.
00:19Particles clump together into visible flocks, and the water gradually becomes clearer.
00:23The key is this chemical, called a flocculant.
00:25It works like millions of tiny magnetic particles.
00:27Once in the water, it absorbs pollutants and pulls them into larger clusters.
00:31In about 30 seconds, the particles settle and separate from the water.
00:34Next, the sludge is sent into a filter press, where high pressure removes the water.
00:38What was once soft sludge becomes solid, dry sludge cakes, shrinking in size and reducing transport and disposal costs.
00:44Many people ask, can this treated water become tap water?
00:47The answer is no.
00:47It's called reclaimed water and doesn't enter the drinking water system.
00:50It's usually released into rivers and lakes to recharge them, or used for city landscaping and street cleaning, reentering the
00:55natural water cycle.
00:56So the question is, does this really count as clean water?
00:59Is this really count as clean water?
00:59Is this really count as clean water?
01:00Is this really count as clean water?
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