Occurrence and Reduction of Emerging Contaminants in Sludge

Emerging contaminants consist of a wide range of anthropogenic as well as natural substances which include pharmaceuticals,personal care products, steroid hormones, industrial chemicals, pesticides and many other emerging compounds. Since theirconcentrations vary from a few ng/L to several μg/L, they may also be called as micropollutants. There has been a growingawareness and concern about these chemicals for the last few decades since many of these are known to have toxic, carcinogenic orendocrine disrupting properties.Limited removal of most of these compounds during wastewater treatment processes, cause them enter the water resources andmove up the food chain. The hydrophobic nature of many of these compounds promote their accumulation in organic phases includingsludge during wastewater treatment plants. This creates extra concern due to the beneficial use of sewage sludge in soil in manycountries around the World. The chemically complex nature of many micropollutants make them hard to degrade during conventionalwastewater and sludge treatment systems. Besides, the presence of wide variety of chemicals indicate that one single treatment type(aerobic or anaerobic) may not be enough to effectively remove them from wastewater and sludge.The way wastewater treatment plants and sludge treatment units operated act as an important determinant on the final concentrationof these chemicals. This talk will highlight the occurrence of emerging contaminants in wastewater and sludge and the governingfactors to reduce them from wastewater effluents and from sludge.
Citation Formats
F. D. Sanin, “Occurrence and Reduction of Emerging Contaminants in Sludge,” presented at the The 16th IWA Leading Edge Conference on Water and Wastewater Technologies (10 - 14 Haziran 2019), Edinburgh, Scotland, 2019, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/77989.