期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 506, 期 -, 页码 315-322出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2014.10.113
关键词
Biofilm reactors; Wastewater; Aerobic degradation; Pharmaceuticals; Pesticides; Kinetics
资金
- AUFF
The degradation of seven compounds which are usually recalcitrant in classical activated sludge treatment (e.g., diclofenac, propranolol, iopromide, iohexol, iomeprol tebuconazole and propiconazole) was studied in a biofilm reactor (slow sand filtration). This reactor was used to treat real effluent-wastewater at different flow rates (hydraulic loadings) under aerobic conditions so removal and degradation kinetics of these recalcitrant compounds were calculated. With the hydraulic loading rate of 0.012 m(3) m (2) h(-1) the reactor removed 41, 94, 58,57 and 85% of diclofenac, propranolol, iopromide, iohexol and iomeprol respectively. For these compounds the removal efficiency was dependent on hydraulic residence-times. Only 59 and 21% of the incoming tebuconazole and propiconazole respectively were removed but their removal did not depend on hydraulic residence time. Biofilm reactors are thus efficient in removing micro-pollutants and could be considered as an option for advanced treatment in small wastewater treatment plants. (C) 2014 Elsevier B.V. All rights reserved.
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