Publication Details

Reference Category Journals
DOI / URL link
Creative Commons Licence creative commons licence
Title (Primary) Polar micropollutants and metals in centrate from dewatered sewage sludge intended for reuse in soilless horticulture
Author Genz, P.; Reemtsma, T.
Journal ACS Environmental Science and Technology Water
Year 2022
Department ANA
Volume 2
Issue 12
Page From 2548
Page To 2557
Language englisch
Topic T9 Healthy Planet
Supplements https://pubs.acs.org/doi/suppl/10.1021/acsestwater.2c00345/suppl_file/ew2c00345_si_001.pdf
Keywords sludge liquor; centrifugation; trace contaminants; anaerobic digestion; horticulture; pharmaceuticals; heavy metals; hydroponic
Abstract The so-called centrate, the water remaining from digested sludge centrifugation in municipal wastewater treatment, is an untapped resource of both macro- and micronutrients for plant cultivation. However, both organic and inorganic contaminants present in the centrate may affect the quality of the produce if taken up by the plants. Little is known about the micropollutants present in the centrate. The centrate, influent, and effluent of a municipal wastewater treatment plant were analyzed for 27 polar organic micropollutants over a period of 28 days by direct injection liquid chromatography tandem mass spectrometry. The median dissolved concentrations in the centrate exceeded the concentrations in both the influent and effluent for most compounds: highest concentrations were found for benzotriazole (79 μg/L), valsartan (57 μg/L), and ibuprofen (18 μg/L). Micropollutants that are anaerobically degradable were not detected in the centrate. Among the heavy metals analyzed, highest concentrations were detected for Zn (47 μg/L) and Ni (17 μg/L). The increasing turbidity of the centrate led to elevated concentrations of less-polar micropollutants, while higher coagulant dosing increased the concentrations of more polar compounds. This first comprehensive study on polar organic micropollutants and metals in the centrate outlines that nutrient recovery from the centrate has to deal with both organic micropollutants and heavy metals present in the centrate.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26797
Genz, P., Reemtsma, T. (2022):
Polar micropollutants and metals in centrate from dewatered sewage sludge intended for reuse in soilless horticulture
ACS ES&T Water 2 (12), 2548 - 2557