Occurrence and Fate of Trace Contaminants during Aerobic and Anaerobic Sludge Digestion and Dewatering
| Autor: | Chris D. Metcalfe, M. Lewina Svoboda, Sonya Kleywegt, Eric J. Reiner, P. Guerra, Shirley Anne Smyth, Terry Kolic, Hing-Biu Lee, M. Payne |
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| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Biosolids Triclocarban Management Monitoring Policy and Law Pollution Environmental impact of pharmaceuticals and personal care products chemistry.chemical_compound Anaerobic digestion Activated sludge chemistry Wastewater Environmental chemistry Sewage treatment Aerobic digestion Waste Management and Disposal Water Science and Technology |
| Zdroj: | Journal of Environmental Quality. 44:1193-1200 |
| ISSN: | 0047-2425 |
| Popis: | Digestion of municipal wastewater biosolids is a necessary prerequisite to their beneficial use in land application, in order to protect public health and the receiving environment. In this study, 13 pharmaceuticals and personal care products (PPCPs), 11 musks, and 17 polybrominated diphenyl ethers were analyzed in 84 samples including primary sludge, waste activated sludge, digested biosolids, dewatered biosolids, and dewatering centrate or filtrate collected from five wastewater treatment plants with aerobic or anaerobic digestion. Aerobic digestion processes were sampled during both warm and cold temperatures to analyze seasonal differences. Among the studied compounds, triclosan, triclocarban, galaxolide, and BDE-209 were the substances most frequently detected under different treatment processes at levels up to 30,000 ng/g dry weight. Comparing aerobic and anaerobic digestion, it was observed that the levels of certain PPCPs and musks were significantly higher in anaerobically digested biosolids, relative to the residues from aerobic digestion. Therefore, aerobic digestion has the potential advantage of reducing levels of PPCPs and musks. On the other hand, anaerobic digestion has the advantage of recovering energy from the biosolids in the form of combustible gases while retaining the nutrient and soil conditioning value of this resource. |
| Databáze: | OpenAIRE |
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