Meiramkulova Kulyash, Mkilima Timoth, Baituk Galym, Beisembayeva Kulzhan, Meirbekov Abdilda, Kakabayev Anuarbek, Adilbektegi Gulmira, Tleukulov Almas, Tazhkenova Gaukhar
Department of Environmental Engineering and Management, Faculty of Natural Sciences, L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan.
Department of Civil Engineering, Faculty of Architecture and Construction, L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan.
PLoS One. 2022 Jun 3;17(6):e0259614. doi: 10.1371/journal.pone.0259614. eCollection 2022.
Direct utilization of treated effluent from natural treatment systems for irrigation can be challenging on sensitive plants due to high levels of salinity. Post-treatment of such an effluent prior to its applicability in irrigation can be of significant importance. In this study, the wastewater from a natural treatment plant was treated using a lab-scale filtration system with zeolite as a filter material. Three different column depths (0.5 m, 0.75 m, and 1 m) were used to investigate the effect of column depth on the treatment efficiency of the media. The suitability of the raw wastewater and the treated effluent from each column for irrigation purposes was investigated. The water quality parameters investigated were; electrical conductivity (EC), total dissolved solids (TDS), sodium (Na+), calcium (Ca2+), and magnesium (Mg2+). From the analysis results, it was observed that the column depth had a significant influence on the removal efficiency of the pollutants. The highest removal efficiency (94.58%) was achieved from the combination of electrical conductivity and 1 m column depth, while the lowest removal efficiency (10.05%) was observed from the combination of calcium and 0.5 m column depth. The raw wastewater fell mostly into a "very high" hazard, which is class four (C4) based on electrical conductivity and class four (S4) based sodium adsorption ratio; making it unsuitable for irrigation purposes. However, when the wastewater was subjected to 1 m column depth, the quality of the treated effluent improved significantly which in turn also improved the suitability of the effluent for irrigation purposes, with percent compliance ranging from 20.19% to 97.54%.
由于盐度较高，将天然处理系统处理后的废水直接用于灌溉对敏感植物而言可能具有挑战性。在这种废水用于灌溉之前进行后处理可能具有重要意义。在本研究中，使用以沸石为过滤材料的实验室规模过滤系统处理来自天然处理厂的废水。采用三种不同的柱深（0.5米、0.75米和1米）来研究柱深对介质处理效率的影响。研究了各柱的原废水和处理后废水用于灌溉的适用性。所研究的水质参数有：电导率（EC）、总溶解固体（TDS）、钠（Na+）、钙（Ca2+）和镁（Mg2+）。从分析结果可以看出，柱深对污染物的去除效率有显著影响。电导率与1米柱深的组合去除效率最高（94.58%），而钙与0.5米柱深的组合去除效率最低（10.05%）。原废水大多属于“极高”危害等级，基于电导率为四级（C4），基于钠吸附率为四级（S4）；因此不适合用于灌溉。然而，当废水经过1米柱深处理后，处理后废水的质量显著改善，进而也提高了废水用于灌溉的适用性，达标率在20.19%至97.54%之间。
