This study introduces an integrated system of direct contact membrane distillation (DCMD) and microalgae bioremediation for green removal of arsenic from the polluted river water. An inexpensive hydrophobic kaolin hollow fiber membrane (h-KHFM) was fabricated and used in the DCMD process for arsenic treatment on the polluted river water. The membrane demonstrates an excellent arsenic rejection of 100 % and a stable flux of 23.3 kg/m²h throughout the prolonged operation of 70 h. The performance of this membrane was compared with those of NF and RO; the results indicate superior performance of h-KHFM over the latter two processes in terms of permeate flux, arsenic rejection, as well as the performance flexibility and consistency at various pH conditions. The arsenic-rich retentate of the DCMD process is then bioremediated using Botryococcus sp. with an initial cell concentration of 1 × 10⁶ cells/mL at the outdoor conditions. The findings show that Botryococcus sp. successfully grow in the retentate with a common microalgae growth pattern during the 20 days test period, which indicates the potential and feasibility of this integrated system for the arsenic retentate management. This study is pioneer and could provide an insight for the development of wastewater treatment technologies with zero waste discharge.

这项研究引入了直接接触膜蒸馏（DCMD）和微藻生物修复的集成系统，用于从污染的河水中绿色去除砷。制造了廉价的疏水性高岭土中空纤维膜（h -KHFM），并将其用于DCMD工艺中，用于对污染的河水进行砷处理。在整个70小时的长期运行过程中，该膜均表现出100％的出色砷吸收率和23.3 kg / m ² h的稳定通量。将该膜的性能与NF和RO的性能进行了比较。结果表明h的优异性能在后两个过程中，KHFM在渗透通量，砷排斥以及在各种pH条件下的性能灵活性和一致性方面均表现出色。然后使用Botryococcus sp对DCMD过程的富砷截留物进行生物修复。在室外条件下初始细胞浓度为1×10 ⁶细胞/ mL。调查结果表明，葡萄球菌。在20天的测试期间内，具有常见微藻生长模式的滞留物成功生长，这表明该集成系统对砷滞留物进行管理的潜力和可行性。这项研究是开创性的，可以为零排放废水处理技术的发展提供见识。