A fellow student in my time in St Andrews, Scotland, Rick Hudson, formed a company Cresswater in UK that also uses natural processes to the same end of substantial waste water purification.  It successfully produces what he called ‘grey water’ from sewage by filtration through special reed beds constructed for the purpose, on various scales.   It is more than a decade since I last contacted him — some details of the installations here:  
https://cresswater.co.uk/about-us/
I imagine similar artificial reed filtration systems are in use also in N. America, but haven’t checked. 
Steve

On Jan 11, 2022, at 6:24 PM, Peter Payzant <peter@payzant.net> wrote:

I remember that very well - I was very impressed, and I wonder if it was ever adopted by other sites in the province.

They appear to be still extant in some way; there's more information here.

--- Peter Payzant


On 2022-01-11 5:40 PM, Doug Linzey wrote:
HI Pat,

You may be thinking of one of two Solar Aquatics installations, one in Beaverbank, one in Bear River. I'm attaching my report (from 1996) on a field trip to  Beaverbank. The concept must have been ahead of its time, apparently not supported by government and allowed to wither away. Too bad. I visited both and was very enthusiastic about the idea, as were the communities served by the systems.

Doug Linzey


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