Hydrometallurgy and Inorganic Molecular Chemistry Laboratory, Chemistry Faculty, University of Sciences and Technology Houari Boumediene (USTHB), BP 32, El-Alia, Bab-Ezzouar, Algiers, Algeria,
Appl Microbiol Biotechnol. 2014 Jun;98(11):5227-39. doi: 10.1007/s00253-014-5601-2. Epub 2014 Mar 8.
This work enters in the optics of the denitrification of a polluted water by two membrane techniques, the Donnan dialysis (DD) and the ion exchange membrane bioreactor (IEMB), using a conventional barrier, composed by an anion exchange membrane (AEM), and a hybrid barrier, where the AEM is combined to an anion exchange textile (AET). The effects of the hydrodynamic factor and the nature of the carbon source on the transfer and the reduction of nitrate ions were studied. The study results obtained through the DD showed the effectiveness of the hybrid barrier in the recovery and concentration of nitrate ions. This was also recorded during denitrification by the hybrid process, called the ion exchange membrane textile bioreactor (IEMTB), with a significant reduction of nitrates, compared to IEMB, due to the efficiency of the Pseudomonas aeruginosa biofilm formed at the surface of the AET. Here, the permselectivity of the membrane and the good bioreduction of the pollutants are no longer major conditions to the better performance of the process. The application of IEMTB in the denitrification of groundwater, having a nitrate concentration of 96.67 ppm, shows a total reduction of nitrate ions without changing the quality of the water. Indeed, the analysis of the recovered water, or yet the treated water, shows the absence of the bacterium by-products and concentrations in the nitrates and nitrites which are, respectively, equal to 0.02±0.01 ppm, and inferiors to the detection limit (<0.02 ppm).
本工作研究了两种膜技术（Donnan 渗析（DD）和离子交换膜生物反应器（IEMB））对受污染水的脱氮作用，使用常规屏障，由阴离子交换膜（AEM）和混合屏障组成，其中 AEM 与阴离子交换纺织品（AET）结合。研究了水动力因素和碳源性质对硝酸盐离子传递和还原的影响。通过 DD 研究结果表明，混合屏障在硝酸盐离子的回收和浓缩方面具有有效性。在混合过程（称为离子交换膜纺织品生物反应器（IEMTB））的反硝化过程中也记录了这一点，与 IEMB 相比，由于在 AET 表面形成的铜绿假单胞菌生物膜的效率，硝酸盐的去除量显著减少。在这里，膜的选择透过性和污染物的良好生物还原不再是提高过程性能的主要条件。IEMTB 应用于硝酸盐浓度为 96.67 ppm 的地下水的脱氮，显示出硝酸盐离子的完全还原，而不改变水的质量。实际上，对回收水或处理水的分析表明，不存在细菌副产物，硝酸盐和亚硝酸盐的浓度分别等于 0.02±0.01 ppm，低于检测限（<0.02 ppm）。
