Urban wastewater treatment
Figure
Created 12 Nov 2009
Published 12 Nov 2009
Last modified 29 Nov 2012
1
min read
Only countries with data from all periods included
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Number of countries in brackets. Northern: Iceland, Norway, Sweden, Finland; Western: Austria, Ireland, United Kingdom, Luxembourg, the Netherlands, Germany, Denmark; Southern: Greece, Spain. Primary wastewater treatment removes part of the suspended solids, but no ammonium; secondary (biological) treatment uses aerobic or anaerobic micro-organisms, retains 20 % to 30 % of the nutrients and removes around 75 % ammonium; tertiary treatment includes phosphorus retention and in some cases nitrogen removal.
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For references, please go to https://www.eea.europa.eu/data-and-maps/figures/urban-wastewater-treatment or scan the QR code.
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