EVALUATION OF TREATMENT TECHNOLOGY TO IMPROVE THE QUALITY OF UNDERGROUND WASTEWATER AT VINACOMIN HA LAM COAL JOINT STOCK COMPANY, QUANG NINH BY ULTRA FILTRATION (UF)

Abstract

Water pollution is a problem that receives a lot of attention from the community and society. Especially, wastewater from the exploitation of assets, going through treatment systems is a problem that needs to be solved. This study aimed to evaluate the wastewater treatment system of VINACOMIN coal joint-stock company Ha Lam, Quang Ninh by ultrafiltration membrane (UF). The survey was carried out over the period from May 2020 to December 2020, at the end of the dry season and the middle of the rainy season, focused on wastewater generated by coal extraction, production, and processing in areas of the company. The research shows that the company's underground wastewater was polluted with the same pollution as most of the wastewater from pit mining. After treatment, it met the permissible standards according to column B QCVN 40:2015/BTNMT on industrial wastewater with values ​​such as pH, total suspended solids (TSS), metals and heavy metals such as Fe, Mn, Pb... which were qualified, within the permitted threshold and allowed to be discharged into the environment.