Environmental Science, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark.
Environmental Science, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark.
Sci Total Environ. 2015 Feb 15;506-507:315-22. doi: 10.1016/j.scitotenv.2014.10.113. Epub 2014 Nov 22.
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.
在生物膜反应器（慢砂滤池）中研究了通常在经典活性污泥处理中难降解的七种化合物（如双氯芬酸、普萘洛尔、碘普罗胺、碘海醇、碘美普尔、噻康唑和丙酸氟替卡松）的降解情况。该反应器用于在需氧条件下以不同流速（水力负荷）处理实际废水，因此计算了这些难降解化合物的去除和降解动力学。在水力负荷为 0.012 m(3)m(2)h(-1)时，反应器分别去除了 41%、94%、58%、57%和 85%的双氯芬酸、普萘洛尔、碘普罗胺、碘海醇和碘美普尔。对于这些化合物，去除效率取决于水力停留时间。仅去除了 59%和 21%的噻康唑和丙酸氟替卡松，但它们的去除并不取决于水力停留时间。因此，生物膜反应器在去除微量污染物方面非常有效，可以被视为小型污水处理厂的高级处理选项。
