期刊
WATER RESEARCH
卷 56, 期 -, 页码 26-36出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2014.02.038
关键词
PAC/UF; Organic micropollutants; Submerged ultrafiltration; Pressurized ultrafiltration; Advanced wastewater treatment
资金
- FOEN [UTF 349.29.10/IDM 2006.2423.30]
Two hybrid membrane processes combining powdered activated carbon (PAC) adsorption with ultrafiltration (UF) were investigated regarding operational performance and efficiency to remove organic micropollutants from municipal wastewater treatment plant effluent. A pressurized PAC/UF (pPAC/UF) and a submerged PAC/UF (sPAK/UF) system were operated continuously over a period of six months. Both UF membrane systems showed good compatibilitywith the application of PAC showing no abrasion or other negative impacts. The pPAC/UF system reached permeability values up to 290 L/(m(2)h bar) at high fluxes of 80 L/(m(2)h) compared to the sPAC/UF with a permeability of up to 200 L/(m(2)h bar) at fluxes of up to 23 L/(m(2)h). Surface analysis of both membranes with scanning electron microscopy revealed no membrane deterioration after the six-month period of operation. On the surface of the pressurized membrane the formation of a PAC layer was observed, which may have contributed to the high permeability by forming a protective coating. Five micropollutants, i.e. sulfamethoxazole, carbamazepine, mecoprop, diclofenac and benzotriazole in ambient effluent concentrations were investigated. Both PAC/UF systems removed 60-95% of the selected micropollutants at a dosage of 20 mg PAC/L and 4 mg Fe3+/ L. However, extreme peak loads of sulfamethoxazole with concentrations of up to 30 mu g/L caused a considerable performance decrease for more than a week. 2014 Elsevier Ltd. All rights reserved.
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