Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800, Kgs. Lyngby, Denmark.
Department of Civil Engineering, Technical University of Denmark, Bygningstorvet, Brovej, Building 118, 2800, Kgs. Lyngby, Denmark.
Environ Sci Pollut Res Int. 2018 Nov;25(33):32851-32859. doi: 10.1007/s11356-017-8585-5. Epub 2017 Feb 16.
Conventional wastewater treatment is challenging in the Arctic region due to the cold climate and scattered population. Thus, no wastewater treatment plant exists in Greenland, and raw wastewater is discharged directly to nearby waterbodies without treatment. We investigated the efficiency of physicochemical wastewater treatment, in Kangerlussuaq, Greenland. Raw wastewater from Kangerlussuaq was treated by chemical coagulation and UV disinfection. By applying 7.5 mg Al/L polyaluminium chloride (PAX XL100), 73% of turbidity and 28% phosphate was removed from raw wastewater. E. coli and Enterococcus were removed by 4 and 2.5 log, respectively, when UV irradiation of 0.70 kWh/m was applied to coagulated wastewater. Furthermore, coagulated raw wastewater in Denmark, which has a chemical quality similar to Greenlandic wastewater, was disinfected by peracetic acid or UV irradiation. Removal of heterotrophic bacteria by applying 6 and 12 mg/L peracetic acid was 2.8 and 3.1 log, respectively. Similarly, removal of heterotrophic bacteria by applying 0.21 and 2.10 kWh/m for UV irradiation was 2.1 and greater than 4 log, respectively. Physicochemical treatment of raw wastewater followed by UV irradiation and/or peracetic acid disinfection showed the potential for treatment of arctic wastewater.
由于气候寒冷和人口分散，常规废水处理在北极地区具有挑战性。因此，格陵兰没有污水处理厂，未经处理的原污水直接排放到附近的水体中。我们研究了格陵兰康克鲁斯瓦格的物理化学废水处理的效率。康克鲁斯瓦格的原污水经过化学混凝和紫外线消毒处理。当向混凝后的污水施加 0.70 kWh/m 的紫外线照射时，通过添加 7.5 mg Al/L 的聚合氯化铝 (PAX XL100)，可去除 73%的浊度和 28%的磷酸盐。当施加 7.5 mg Al/L 的聚合氯化铝 (PAX XL100) 时，大肠杆菌和肠球菌分别去除了 4 和 2.5 个对数。此外，用过乙酸或紫外线照射对来自丹麦的与格陵兰污水化学性质相似的混凝原污水进行消毒。分别施加 6 和 12 mg/L 过乙酸可去除 2.8 和 3.1 个对数的异养菌。同样，分别施加 0.21 和 2.10 kWh/m 的紫外线照射可去除 2.1 和大于 4 个对数的异养菌。原污水的物理化学处理后再进行紫外线照射和/或过乙酸消毒，显示出处理北极废水的潜力。
