Department of Civil Engineering, Faculty of Engineering, Al-Azhar University, Cairo, Egypt.
J Hazard Mater. 2011 Sep 15;192(3):1418-26. doi: 10.1016/j.jhazmat.2011.06.057. Epub 2011 Jun 28.
The study examined combined photo-Fenton-SBR treatment of an antibiotic wastewater containing amoxicillin and cloxacillin. Optimum H(2)O(2)/COD and H(2)O(2)/Fe(2+) molar ratio of the photo-Fenton pretreatment were observed to be 2.5 and 20, respectively. Complete degradation of the antibiotics occurred in one min. The sequencing batch reactor (SBR) was operated at different hydraulic retention times (HRTs) with the wastewater treated under different photo-Fenton operating conditions (H(2)O(2)/COD and H(2)O(2)/Fe(2+) molar ratio). The SBR performance was found to be very sensitive to BOD(5)/COD ratio of the photo-Fenton treated wastewater. Statistical analysis of the results indicated that it was possible to reduce the Fe(2+) dose and increase the irradiation time of the photo-Fenton pretreatment. The best operating conditions of the combined photo-Fenton-SBR treatment were observed to be H(2)O(2)/COD molar ratio 2, H(2)O(2)/Fe(2+) molar ratio 150, irradiation time 90 min and HRT of 12h. Under the best operating conditions, 89% removal of sCOD with complete nitrification was achieved and the SBR effluent met the discharge standards.
该研究考察了组合光芬顿-SBR 处理含阿莫西林和氯唑西林的抗生素废水。观察到光芬顿预处理的最佳 H(2)O(2)/COD 和 H(2)O(2)/Fe(2+)摩尔比分别为 2.5 和 20。抗生素在一分钟内完全降解。序批式反应器（SBR）在不同的水力停留时间（HRT）下运行，废水在不同的光芬顿操作条件（H(2)O(2)/COD 和 H(2)O(2)/Fe(2+)摩尔比）下进行处理。发现 SBR 的性能对光芬顿处理废水的 BOD(5)/COD 比值非常敏感。对结果进行的统计分析表明，可以减少 Fe(2+)剂量并增加光芬顿预处理的辐照时间。观察到组合光芬顿-SBR 处理的最佳操作条件为 H(2)O(2)/COD 摩尔比 2、H(2)O(2)/Fe(2+)摩尔比 150、辐照时间 90 分钟和 HRT 为 12 小时。在最佳操作条件下，sCOD 的去除率达到 89%，完全硝化，SBR 出水达到排放标准。
