Effects of floc aluminum on activated sludge characteristics and removal of 17-alpha-ethinylestradiol in wastewater systems

Water Research
Chul ParkJohn T Novak

Abstract

The effects of floc aluminum (Al) on activated sludge performance and 17-alpha-ethinylestradiol (EE2) removal were studied using bench-scale activated sludge systems. The results showed that higher Al-fed activated sludge led to better settling, dewatering, and effluent quality with better EE2 removal. EE2 concentrations in the effluent revealed correlations with effluent suspended solids and large particulate/colloidal effluent biopolymer (protein+polysaccharide). Furthermore, a significant correlation existed between effluent proteins and EE2 for all size fractions, indicating that hydrophobic proteinaceous colloids provide binding sites for EE2 and washout together into the effluent. These results suggest that aluminum plays a crucial role in bioflocculation of activated sludge and the efficacy of flocculation influences the removal of endocrine disrupting compounds (EDCs) from wastewater treatment systems.

Citations

Jun 9, 2014·Chemosphere·Yolanda PatiñoSalvador Ordóñez
Apr 23, 2015·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Miriam WellsPaul Broady
Mar 1, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Lei ZhangXin Wang
Feb 13, 2015·Environmental Science. Processes & Impacts·M-F MorissetteS Sauvé
Jun 24, 2017·Environmental Science and Pollution Research International·Lilian K de OliveiraEduardo F Molina
Jul 27, 2018·The Science of the Total Environment·Haojie LaiDanny Reible
Jun 19, 2010·Environmental Science & Technology·Pamela J Westgate, Chul Park

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