Adaptable Process Design as a Key for Sustainability Upgrades in Wastewater Treatment: Comparative Study on the Removal of Micropollutants by Advanced Oxidation and Granular Activated Carbon Processing at a German Municipal Wastewater Treatment Plant

Michael Toni Sturm, Erika Myers, Dennis Schober, Clara Thege, Anika Korzin and Katrin Schuhen ()
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Michael Toni Sturm: Wasser 3.0 gGmbH, Neufeldstr. 17a–19a, 76187 Karlsruhe, Germany
Erika Myers: Wasser 3.0 gGmbH, Neufeldstr. 17a–19a, 76187 Karlsruhe, Germany
Dennis Schober: Wasser 3.0 gGmbH, Neufeldstr. 17a–19a, 76187 Karlsruhe, Germany
Clara Thege: Van Remmen UV Technology, Hooglandweg 3a, 8131 TE Wijhe, The Netherlands
Anika Korzin: Wasser 3.0 gGmbH, Neufeldstr. 17a–19a, 76187 Karlsruhe, Germany
Katrin Schuhen: Wasser 3.0 gGmbH, Neufeldstr. 17a–19a, 76187 Karlsruhe, Germany

Sustainability, 2022, vol. 14, issue 18, 1-23

Abstract: Micropollutants have been increasingly detected at low concentrations in surface waters and may have harmful effects on humans, organisms, and the environment. As wastewater treatment plants are one of the main sources of micropollutants, conventional wastewater treatment methods and plants (mainly one to three cleaning stages) must be improved through an advanced (fourth) treatment stage. The optimal fourth treatment stage should be determined based not only on removal efficiencies but also on a holistic sustainability assessment that further considers the process’s adaptability, economic, environmental, and social parameters. The ability of a tertiary wastewater treatment plant to remove organic pollutants was investigated over four months using two different advanced treatment methods: (1) an advanced oxidation process (AOP) (using UV + H 2 O 2 ) and (2) granular activated carbon (GAC). The resulting average micropollutant removal efficiencies were 76.4 ± 6.2% for AOP and 90.0 ± 4.6% for GAC. As the GAC became saturated, it showed a decreasing performance from 97.6% in week one to 80.7% in week 13, after 2184 bed volumes were processed. For the AOP, adjusting the UV and H 2 O 2 doses results in higher removal efficiencies. With 40 ppm H 2 O 2 and 10 kJ/m 2 UV, a removal of 97.1% was achieved. Furthermore, the flexibility and adaptability of the AOP process to adjust to real-time water quality, along with a lower resource consumption and waste disposal, make it a more promising technology when comparing the sustainability aspects of the two methods.

Keywords: wastewater treatment; advanced oxidation process; granular activated carbon; UV; hydrogen peroxide; fourth cleaning stage; removal efficiency; micropollutants; sustainable process design (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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