Department of Environmental Science, Keimyung University, South Korea; Deputy for Natural Resources Development Technology, The Agency for Assessment and Application of Technology (BPPT), Indonesia.
Department of Environmental Science, Keimyung University, South Korea.
Mar Pollut Bull. 2019 Sep;146:696-702. doi: 10.1016/j.marpolbul.2019.06.071. Epub 2019 Jul 19.
This study investigated the removal of microplastics from different treatment stages in three WWTPs and examined the performance of tertiary treatment that was done by coagulation and different technologies such as ozone (WWTP-A), membrane disc-filter (WWTP-B), and rapid sand filtration (WWTP-C). The results showed that the primary and secondary treatment processes effectively remove microplastics from wastewater with efficiencies ranging between 75% and 91.9%. The removal efficiency increased further to >98% after tertiary treatment. Microbeads and fragments were the major types of microplastics found in all wastewater sampling points. Microbeads found in the wastewater samples were classified as primary microplastics, that mainly came from personal care products, whereas secondary microplastics consisted of fragments, fibers, and sheets that were generated mainly due to fragmentation of larger plastics. Microplastics were still found in a high concentration in the final effluent, especially from WWTP-B, which is discharged into the Geumho river.
本研究调查了三个污水处理厂不同处理阶段对微塑料的去除效果，并考察了混凝等三级处理技术以及臭氧（WWTP-A）、膜圆盘过滤器（WWTP-B）和快速砂滤（WWTP-C）的性能。结果表明，一级和二级处理工艺能有效地去除废水中的微塑料，去除效率在 75%至 91.9%之间。经三级处理后，去除效率进一步提高到>98%。微珠和碎片是所有废水采样点中主要的微塑料类型。废水中发现的微珠被归类为初级微塑料，主要来自个人护理产品，而二级微塑料由碎片、纤维和薄片组成，主要是由于较大塑料的破碎而产生。微塑料在最终排放水中仍有很高的浓度，特别是来自 WWTP-B 的微塑料，它被排放到 Geumho 河中。
