The trends in Europe show that tertiary is the way. In the chart below notice Belgium. It is moving from no treatment (perhaps like CRD) right to tertiary.
Austria is fully using tertiary treatment
http://www.eea.europa.eu/data-and-maps/indicators/urban-waste-water-treatment/urban-waste-water-treatment-assessment-3
Showing posts with label secondary. Show all posts
Showing posts with label secondary. Show all posts
Saturday, 11 April 2015
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