3 ms·

This [1] and [2] are a pretty good primer on how Kläranlagen are built in Germany where we use a biological water treatment process and are recycling 96% of sew

This [1] and [2] are a pretty good primer on how Kläranlagen are built in Germany where we use a biological water treatment process and are recycling 96% of sewage water. The remaining ~4% (the Schlacke) usually are used as fertilizers for farming or are burned in biogas energy plants. The latter happens when the quality is not good enough or the sewege plant doesn't have a stage 4 filtration system. The German wikipedia entry is actually also pretty good [4] [1] https://umwelt.provinz.bz.it/wasser/wie-funktioniert-eine-klaeranlage.asp https://umwelt.provinz.bz.it/wasser/wie-funktioniert-eine-kl... [2] https://av-selbitztal.de/klaeranlage-naila/funktionsweise https://av-selbitztal.de/klaeranlage-naila/funktionsweise [3] https://industryeurope.com/sectors/energy-utilities/how-germanys-wastewater-management-benefits-its-businesses/ https://industryeurope.com/sectors/energy-utilities/how-germ... [4] https://de.m.wikipedia.org/wiki/Kl%C3%A4ranlage https://de.m.wikipedia.org/wiki/Kl%C3%A4ranlage

freshpots 3y ago
That's a sewage treatment plant treatment process. We don't typically drink treated wastewater, but some places recycle the water after a intensive purification process. Chlorine in drinking water treatment is used for disinfection and a small amount is added after treatment to keep bacteria from growing in the distribution system. Your information is not really relevant but interesting.
rootusrootus 3y ago
Admittedly I don't read German, but I read the translated version and ... it looks very much like a typical sewage treatment plant in the US? What's unique about it? Not adding any chlorine is an interesting choice in any case, you can start out with perfectly pure water and still end up with contamination along the way to your tap. A tiny amount of chlorine prevents that, and it evaporates quickly after the water leaves the tap.

freshpots 3y ago

That's a sewage treatment plant treatment process. We don't typically drink treated wastewater, but some places recycle the water after a intensive purification process. Chlorine in drinking water treatment is used for disinfection and a small amount is added after treatment to keep bacteria from growing in the distribution system. Your information is not really relevant but interesting.

rootusrootus 3y ago

Admittedly I don't read German, but I read the translated version and ... it looks very much like a typical sewage treatment plant in the US? What's unique about it? Not adding any chlorine is an interesting choice in any case, you can start out with perfectly pure water and still end up with contamination along the way to your tap. A tiny amount of chlorine prevents that, and it evaporates quickly after the water leaves the tap.