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JTB Hey,
I wondering what are the definiton of primary treatment, secondary treatment and more stringent treatment for UWWT plants that you can find in informations like in this map
http://www.eea.europa.eu/[…]/uwwt-plants

I found this; secondary treatment = removal of organic pollution
and more stringent treatment = cover nutrient removal
but is't there any guidlines for how much the removal that has too be done?

And one more question, what differ the definitions above from Secondary treatment, primary treatment and tertiary treatment as you can find in pictures like this one http://www.eea.europa.eu/[…]/urban-wastewater-treatment? And can I get any values of the removal for tertiary treatment?

Very greatful for all answers
JTB

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