Strategic Water Infrastructure Laboratory, School of Civil Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.
School of Civil & Environmental Engineering, University of New South Wales, NSW 2052, Australia.
Bioresour Technol. 2015;189:391-398. doi: 10.1016/j.biortech.2015.04.034. Epub 2015 Apr 16.
This study aims to develop a predictive framework to assess the removal and fate of trace organic chemicals (TrOCs) during wastewater treatment by anaerobic membrane bioreactor (AnMBR). The fate of 27 TrOCs in both the liquid and sludge phases during AnMBR treatment was systematically investigated. The results demonstrate a relationship between hydrophobicity and specific molecular features of TrOCs and their removal efficiency. These molecular features include the presence of electron withdrawing groups (EWGs) or donating groups (EDGs), especially those containing nitrogen and sulphur. All seven hydrophobic contaminants were well removed (>70%) by AnMBR treatment. Most hydrophilic TrOCs containing EDGs were also well removed (>70%). In contrast, hydrophilic TrOCs containing EWGs were mostly poorly removed and could accumulate in the sludge phase. The removal of several nitrogen/sulphur bearing TrOCs (e.g., linuron and caffeine) by AnMBR was higher than that by aerobic treatment, possibly due to nitrogen or sulphur reducing bacteria.
本研究旨在开发一种预测框架，以评估厌氧膜生物反应器（AnMBR）处理废水中痕量有机化学品（TrOCs）的去除和归宿。系统研究了 27 种 TrOCs 在 AnMBR 处理过程中液相和污泥相中的归宿。结果表明，TrOCs 的疏水性与其特定的分子特征及其去除效率之间存在关系。这些分子特征包括吸电子基团（EWGs）或供电子基团（EDGs）的存在，特别是含有氮和硫的基团。所有七种疏水性污染物都被 AnMBR 处理很好地去除（>70%）。大多数含有 EDGs 的亲水性 TrOCs 也被很好地去除（>70%）。相比之下，含有 EWGs 的亲水性 TrOCs 则大多被去除较差，并可能在污泥相中积累。一些含氮/硫的 TrOCs（如利谷隆和咖啡因）通过 AnMBR 的去除率高于好氧处理，这可能是由于氮或硫还原菌的存在。
