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The treatment of wastewater with a view to recover both the water & the nutrients has to be favored for a resource efficient strategy, in all countries including European countries. Braunschweig Water Services (BS) have never given up the idea of reusing wastewater in field irrigation, gradually improving the technical settings over a period of more than 50 years. To ensure the quality of the disposed water as well as the sludge, BS have enforced discharge control and requirements for pre-treatment of industrial wastewater: these measures results in the division by a factor of 6 of metallic compounds in sludge and water, thus in compliance with parametric values imposed for soil protection.

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