Evaluation of microplastics in sewage sludge from industrial wastewater treatment activities

Do Van Manh, Huynh Duc Long, Le Xuan Thanh Thao, Vu Dinh Ngo, Phan Nhu Truc, Dang Thi Thom
Author affiliations


  • Do Van Manh Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 – Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Ha Noi, Viet Nam
  • Huynh Duc Long Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 – Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Ha Noi, Viet Nam
  • Le Xuan Thanh Thao Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 – Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Ha Noi, Viet Nam
  • Vu Dinh Ngo Viet Tri University of Industry, 9 Tien Son Street, Tien Cat Sub-district, Viet Tri city, Phu Tho province, Viet Nam
  • Phan Nhu Truc University of Science and Technology, The University of Da Nang, 54 Nguyen Luong Bang, Lien Chieu District, Da Nang, Viet Nam
  • Dang Thi Thom Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 – Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Ha Noi, Viet Nam




microplastics, sewage sludge, preliminary screening


The preliminary screening of microplastics (MPs) in sewage sludge from centralized industrial wastewater treatment plants (WWTPs) in Da Nang city of Viet Nam was investigated in this study. The MPs samples were collected in the sewage sludge from two WWTPs namely Hoa Cam (HC) and Hoa Khanh (HK). The obtained results indicated that the concentrations of MPs in the sewage sludge of HC and HK were 1,164 and 3,745 particles/kg dry weight, respectively. The MPs sizes varied from 1.6 to 5,000 μm, of which the size in the range of 1.6 - 100 μm was dominant at HC (42.5 %) and HK (51.8 %). The shape of MPs was mainly in the form of fragments and fibers. The MPs colour was also observed and the results showed that black, grey and yellow were the main colours of MPs. In addition, MPs chemical composition was determined and the results indicated that polyethylene terephthalate (PET) and polyethylene (PE) were dominant with 36.7 % and 25.2 % for HK and 23.5 % and 25.8 % for HC, respectively.


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How to Cite

D. V. Manh, H. D. Long, L. X. T. Thao, V. D. Ngo, P. N. Truc, and D. T. Thom, “Evaluation of microplastics in sewage sludge from industrial wastewater treatment activities ”, Vietnam J. Sci. Technol., vol. 60, no. 6, pp. 1111–1122, Dec. 2022.