School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jiangxi Province, China.
Water Sci Technol. 2013;67(9):1976-83. doi: 10.2166/wst.2013.077.
In this study, a novel suspended ceramsite was prepared, which has high strength, optimum density (close to water), and high porosity. The ceramsite was used to feed a moving-bed biofilm reactor (MBBR) system with an anaerobic-aerobic (A/O) arrangement to treat petroleum refinery wastewater for simultaneous removal of chemical oxygen demand (COD) and ammonium. The hydraulic retention time (HRT) of the anaerobic-aerobic MBBR system was varied from 72 to 18 h. The anaerobic-aerobic system had a strong tolerance to shock loading. Compared with the professional emission standard of China, the effluent concentrations of COD and NH3-N in the system could satisfy grade I at HRTs of 72 and 36 h, and grade II at HRT of 18 h. The average sludge yield of the anaerobic reactor was estimated to be 0.0575 g suspended solid/g CODremoved. This work demonstrated that the anaerobic-aerobic MBBR system using the suspended ceramsite as bio-carrier could be applied to achieving high wastewater treatment efficiency.
在这项研究中，制备了一种新型的悬浮陶粒，具有高强度、最佳密度（接近水）和高孔隙率。该陶粒用于为移动床生物膜反应器（MBBR）系统提供进料，该系统采用厌氧-好氧（A/O）布置来处理石油炼油废水，同时去除化学需氧量（COD）和铵。厌氧-好氧 MBBR 系统的水力停留时间（HRT）从 72 小时变化到 18 小时。厌氧-好氧系统对冲击负荷具有很强的耐受性。与中国的专业排放标准相比，在 HRT 为 72 小时和 36 小时时，系统出水的 COD 和 NH3-N 浓度可以满足一级标准，在 HRT 为 18 小时时可以满足二级标准。厌氧反应器的平均污泥产率估计为 0.0575 g 悬浮固体/g COD 去除。这项工作表明，使用悬浮陶粒作为生物载体的厌氧-好氧 MBBR 系统可用于实现高废水处理效率。
