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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Decreased UV absorbance as an indicator of micropollutant removal efficiency in wastewater treated with ozone

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). The pilot plant experiment with wastewater effluent from Eawag employed an online UV control device to test its potential for full-scale application.

The UV absorbance decrease was correlated with the removal of 24 target substances at 50% and 80% efficiency. According to the results, there is a big variation in absorbance for different wastewaters and micropollutants therefore correlation between absorbance decrease and micropollutant removal efficiency should be determined for specific wastewater or WWTP.

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