Removal of pharmaceutical compounds by submerged membrane bioreactors (MBRs)
Removal of pharmaceutical compounds by submerged membrane bioreactors (MBRs)
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DOI：
10.1016/j.desal.2004.11.033
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发表时间：
2005-07
期刊：
影响因子：
9.9
通讯作者：
K. Kimura;H. Hara;Y. Watanabe
中科院分区：
文献类型：
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作者：
K. Kimura;H. Hara;Y. Watanabe
非故意的间接饮用水再利用，即废水被用作下游饮用水水源的一部分，已经成为一个非常令人担忧的问题。在这种情况下，废水中含有的各种有机微污染物可能会造成问题。膜生物反应器(MBR)作为一种先进的污水处理技术已经得到了广泛的应用，并有望有效地去除此类有机微污染物。然而，关于膜生物反应器去除微污染物性能的现有信息目前是有限的。这项研究考察了浸没式MBR去除药用活性化合物(PHAC)的能力。在现有的城市污水处理设施上进行了试验，并与传统的活性污泥法(CAS)进行了性能比较。对6种酸性PHAC(环丙沙酸、双氯芬酸、布洛芬、酮洛芬、甲芬酸、萘普生)和1种酸性除草剂敌草畏进行了研究。与CAS相比，MBR对酮洛芬和萘普生的去除效果要好得多。对于其他化合物，观察到两种类型的处理之间具有类似的去除效果。研究发现，PHAC的去除效率取决于它们的分子结构，如芳环的数量或氯的含量。
Unintentional indirect potable water reuse, where wastewater effluent is used as a part of a downstream drinking water source, has become a great concern. In this case, a variety of organic micro-pollutants contained in wastewater effluent could create problems. Membrane bioreactors (MBRs) have gained significant popularity as an advanced wastewater treatment technology and might be effective in removing such organic micro-pollutants. Available information on the performance of MBRs regarding removal of micro-pollutants, however, is currently limited. This study examined the ability of submerged MBRs to remove pharmaceutically active compounds (PhACs). Experiments were conducted at an existing municipal wastewater treatment facility, and the performance of the MBRs was compared with that of the conventional activated sludge (CAS) process. Six acidic PhACs (clofibric acid, diclofenac, ibuprofen, ketoprofen, mefenamic acid, naproxen) and one acidic herbicide (dichloprop) were investigated. Compared with CAS, MBRs exhibited much better removal regarding ketoprofen and naproxen. With respect to the other compounds, comparable removal was observed between the two types of treatment. Removal efficiencies of the PhACs were found to be dependent on their molecular structure such as number of aromatic rings or inclusion of chlorine.