Further information on the reduction of micropollutants in wastewater

Here we provide links to relevant articles and offer summaries of studies on micropollutants and its reduction from wastewater. We also discuss solutions and issues such as cost of removing pharmaceutical residue. New content will be added every month. Please feel free to comment or provide more information in any discussion.

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Posted: May 10, 2016
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Summarized by: Gerly Hey
As revealed by many studies conducted in both pilot and full-scale it is clear that ozone, being a powerful oxidant, not only removes organics and micropollutants in the wastewater but also reduces the toxicity significantly.
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Posted: May 10, 2016
Comments: 0
Summarized by: Gerly Hey
Rodayan et al. (2014) carried out a bench-scale ozonation test to remove 7 psychoactive drugs (also referred as “drug of abuse”) from secondary wastewater effluent, employing different ozone to drug molar ratios. The total initial concentration of the drugs in the wastewater was adjusted to be around 100 µg/l.
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Posted: Feb 22, 2016
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Summarized by: Gerly Hey
Wittmer et al. (2015) investigated the change in UV absorbance of wastewater effluent before and after ozone treatment as a simple control strategy to optimize ozone dose for micropollutant removal. Laboratory batch experiments were carried out using wastewater effluent from 3 different Swiss WWTPs (Eawag, Werdhölzli and Uster).
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Posted: Dec 20, 2015
Categories: Suggested readings
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Summarized by: Gerly Hey

Ozone has been successfully applied in wastewater treatment plants. To know some stories, read the following newsletter articles:

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Posted: Sep 15, 2015
Categories: Suggested readings
Comments: 0
Summarized by: Gerly Hey
The effective removal of unwanted chemicals in wastewater has been a challenge for many wastewater treatment plants due to inefficiency of biological treatment processes especially in cold climates like Sweden.
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Posted: May 18, 2015
Categories: Suggested readings
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Summarized by: Susanna Rehn Hedlund

Pharmaceutical residues and other emerging substances in the effluent of sewage treatment plants

This Swedish study aims to provide a solid knowledge base on the subject of removal of pharmaceutical residue and other emerging substances. Both national and international experts have been consulted to provide a complete review.
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Posted: May 18, 2015
Categories: Suggested readings
Comments: 0
Summarized by: Gerly Hey
The installation and operation of advanced wastewater treatment which aims at reducing organic micropollutants left after the biological treatment, will incur additional cost of treatment. The additional treatment cost for using ozone is surprisingly low according to the following referenced studies.
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Posted: Apr 23, 2015
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Summarized by: Gerly Hey
Altmann, et al. (2014) compared the efficiency of ozone and powdered activated carbon (PAC) for the removal of micropollutants in secondary-treated wastewater effluents characterized by high dissolved organic carbon (DOC) concentration.
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Posted: Apr 23, 2015
Categories: Full-scale studies
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Summarized by: Gerly Hey
Sui et al. (2014) investigated the removal of 13 pharmaceuticals and personal care products (PPCPs) in a full-scale wastewater treatment plant in Beijing, China using sequential UV and O3 for a period of 10 months to determine variations in removal efficiency.
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Posted: Mar 23, 2015
Categories: Full-scale studies
Comments: 0
Summarized by: Gerly Hey
Yang et al. (2011) followed the removal of 19 PPCPs over a period of 12 months in a wastewater reclamation facility in Georgia, USA. Following membrane and GAC filtration, ozonation was employed as a final treatment step of the biologically-treated effluent.
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