Filter by Themen
Abwasserbehandlung
Analytik & Hygiene
Digitalisierung
Energie
Events
Nachhaltigkeit & Umweltschutz
Netze
Wasseraufbereitung
Wassergewinnung
Wasserstress
Water Solutions
Filter by Kategorien
Advertorial
Branche
Events
Forschung & Entwicklung
Leute
News
People
Products & Solutions
Produkte & Verfahren
Publications
Publikationen
Sonstiges
Trade & Industry
Filter by Veranstaltungsschlagworte
abwasser
ACHEMA
Automatisierung
Digitalisierung
Emerging Pollutants
Energie
FDBR
Hydrologie
kanalnetze
Krankheitserreger
MSR
Spurenstoffe
Talsperren
trinkwasser
Wasser
wasseraufbereitung
wasserbau
Wassernetze
Wasserversorgung
FS Logoi

Advancements in predictive models for organic micropollutant removal in drinking water treatment

Drinking water sources increasingly contain organic micropollutants (OMVs). To remove them, water companies use various treatment methods.

von | 25.09.23

In pure water, which does not contain natural organic materials or NOM, this breakthrough can be accurately predicted.
Source: Pixabay/ _Pax_

25. September 2023 ǀ Drinking water sources increasingly contain organic micropollutants (OMVs). To remove them, water companies use various treatment methods.

Thanks to new models, included in the online tool AquaPriori, it is now easier to predict which treatment method will yield the most removal for certain OMVs and it will cost less money and time to determine the best treatment method through experiments.

Predictive models for effective treatment of organic micropollutants in drinking water

The models are based on Quantitative Structure Property Relationships that establish a relationship between the molecular structure of the contaminants and the treatment processes. For treatment with advanced oxidation and membrane technology, these models now have an accuracy of more than 80%. For treatment with activated carbon, the models must be better incorporated into the effects of the natural organic material present. Because organic micropollutants (OMVs) are increasingly found in drinking water sources, additional purification methods are often required, such as membrane filtration, adsorption on activated carbon or (advanced) oxidation processes. But how do you know which of the available methods works best for a newly discovered micropollutant? Testing all methods for each (new) micropollution is expensive and time-consuming. That is why models have been developed within the collective research for the drinking water companies BTO that can predict which treatment method is likely to be the most effective.

Utilizing quantitative structure property relationships in predictive models for water treatment

Models were therefore trained with data from ten years of pilot experiments at KWR and from the literature. Information on the removal of 100 to 500 compounds was used for each treatment method. Quantitative Structure Property Relationships (QSPRs) have been drawn up for these compounds to find a statistical relationship between reaction parameters (such as the quantum yield and various reaction constants) and their molecular structure. The specific parameters of a compound were used in models of the processes of the different treatment methods to predict how well the removal of this specific compound would proceed when using advanced oxidation, membrane filtration and treatment with activated carbon.

Validation and accuracy of predictive models for organic micropollutant treatment

To validate the models, a representative selection of OMVs was made based on a mathematical selection method. This resulted in a set of 30 OMVs that were used in pilot installations of all three treatment methods. For the oxidative methods, the process models were combined with QSPRs for specific kinetic parameters such as the reaction rate constants for O3 and OH radicals and quantum yield. This resulted in models that can predict the oxidation and/or photolysis of OMVs during UV treatment, ozonation, treatment with ozone O3 and hydrogen peroxide H2O2, treatment with UV and hydrogen peroxide and treatment with UV and ozone. When comparing with the measured values ​​for the set of 30 OMVs, the models turned out to be more than 80% accurate.

Models were also developed to predict the removal of OMVs with membrane techniques, namely with spiral-wound nanofiltration membranes (NF) and reverse osmosis (RO) membranes and with capillary NF membranes. The permeability of the membranes to the OMVs was predicted using QSPRs. Here too, an accuracy of more than 80% was achieved.

The removal of organic micropollutants during drinking water preparation with reverse osmosis (RO). In orange the predicted removal, in green the measured removal. Blue is the average removal with other types of membranes.

Predicting organic micropollutant breakthrough and the role of natural organic materials in activated carbon treatment

Finally, a model has been developed to predict when OMVs ‘break through’ (i.e. are no longer removed by the carbon) during treatment with activated carbon. In pure water, which does not contain natural organic materials or NOM, this breakthrough can be accurately predicted. But water usually contains NOM, and then this must be included in the process of activated carbon treatment because NOM competes with OMVs in the adsorption or the pores in the activated carbon, where adsorption of OMVs takes place. A better model is currently being developed in which the effects of different fractions of natural organic materials on the adsorption to activated carbon of different OMVs are correctly incorporated. With the above-mentioned models, an efficient method has been developed to predict which type of treatment method is best. can act on a new organic micropollution. These models are included in the online tool AquaPriori that allows water companies and laboratories to quickly estimate the removal of organic micropollutants. Experimental research is then of course needed to verify these predictions, but because the models provide substantiated direction to the research, such experiments will cost less time and money.

Jetzt Newsletter abonnieren

Stoff für Ihr Wissen, jede Woche in Ihrem Postfach.

Hier anmelden

Potenzial von Flusswärmepumpen im Klimawandel
Potenzial von Flusswärmepumpen im Klimawandel

Antonius Mashadhiarto Wiryanto, Student der Hochschule Bonn-Rhein-Sieg, untersucht in seiner Bachelorarbeit das Potenzial von Flusswärmepumpen am Beispiel des Rheins. Seine Analyse zeigt, dass diese Technologie trotz niedriger Wasserstände eine nachhaltige Wärmequelle darstellen kann und in Zukunft bis zu 10.000 Haushalte in Köln klimafreundlich beheizen könnte. Die Forschung unterstreicht das Potenzial von Flusswärmepumpen zur CO₂-Reduktion und betont ihre Relevanz im Kampf gegen den Klimawandel.

mehr lesen
Flutkatastrophe in der Region Valencia: mögliche Ursachen
Flutkatastrophe in der Region Valencia: mögliche Ursachen

Am 29. Oktober 2024 fand in der Region Valencia in Spanien einer der verheerendsten Stürme in der Geschichte der Region statt, der nach heutigem Kenntnisstand über 200 Menschenleben forderte. Während die Suche nach Vermissten und die Aufräumarbeiten weitergehen, gibt es Erklärungen, wie es dazu kommen konnte.

mehr lesen
40th UN-Water Meeting: Central discussions and key information
40th UN-Water Meeting: Central discussions and key information

The 40th UN-Water Meeting was held at UN Headquarters in New York, from 4-5 November 2024. The event focused on the importance of water in accelerating progress as well as on the linkages between the water agenda and the three Rio Conventions on biodiversity, climate change and desertification.

mehr lesen
Neue AWI-Simulationen zeigen Klimawandel-Effekte auf Wetterextreme
Neue AWI-Simulationen zeigen Klimawandel-Effekte auf Wetterextreme

Eine neue Modellierungsmethode des AWI ermöglicht es, reale Wetterereignisse mit und ohne Klimawandel zu vergleichen. So wird sichtbar, wie die globale Erwärmung extreme Wetterphänomene wie Sturmtief „Boris“ beeinflusst – und wie ein neues Online-Tool es jedem ermöglicht, diese Zusammenhänge in nahezu Echtzeit nachzuvollziehen.

mehr lesen

Passende Firmen zum Thema:

Sie möchten die gwf Wasser + Abwasser testen

Bestellen Sie Ihr kostenloses Probeheft

Überzeugen Sie sich selbst: Gerne senden wir Ihnen die gwf Wasser + Abwasser kostenlos und unverbindlich zur Probe!

Finance Illustration 03