Chu, Thi Hai Nam, Huu Hiep Hoang, and Thi Thu Huyen Nguyen. 2021. “Factors Affecting the Flocculation Process Waste Emulsion Cutting Oil Reduce COD Content”. JST: Engineering And Technology For Sustainable Development 31 (1):78-82. https://doi.org/10.51316/jst.148.etsd.2021.31.1.16.