Abstract：
This paper investigated the MP presence and removal in the urban WWTP in Astana, the capital city of Kazakhstan. MP concentrations in the 100-5000 μm size were analyzed across treatment stages with a modified treatment process scheme, and their removal efficiencies were evaluated. The WWTP effluent displayed a low MP concentration (4.06 ± 3.06 MP/L to 5.44 ± 3.51 MP/L), but considering the daily wastewater discharge (253,900,000 L/day), it can significantly contribute to the MP pollution of aquatic systems. Seasonal variation was observed in the influent, with higher abundance during summer, while no significant trend was observed in the effluent. The WWTP achieved an 88.6-93.0 % removal efficiency, with mechanical treatment and granular filtration being the most effective, followed by biological treatment and UV disinfection. Fragments were the most abundant among the observed shapes (53.9-59.9 %) and black MPs dominated (44.7-67.5 %). Polyethylene (PE) emerged as the most prevalent polymer type among the MPs analyzed (31.6-35.7 %).
摘要：
本文研究了阿斯塔纳城市污水处理厂中MP的存在和去除，哈萨克斯坦首都。在100-5000μm大小的MP浓度在整个处理阶段进行了分析，采用改进的处理工艺方案，并对其去除效率进行了评价。污水处理厂出水的MP浓度较低(4.06±3.06MP/L至5.44±3.51MP/L),但考虑到每日废水排放量(253,900,000升/天)，它可以显著促进水系统的MP污染。在进水中观察到季节性变化，夏季丰度较高，而在废水中没有观察到明显的趋势。污水处理厂达到88.6-93.0%的去除效率，机械处理和颗粒过滤是最有效的，其次是生物处理和紫外线消毒。在观察到的形状中，碎片最丰富（53.9-59.9％），黑色MPs占主导地位（44.7-67.5％）。聚乙烯(PE)是分析的MP中最普遍的聚合物类型(31.6-35.7%)。
