Developing a set of appropriate criteria on production technology and environmental treatment for steel product manufacturing facilities with hot dip zinc plating process in Ba Ria - Vung Tau Province

2025-06-18T13:34:30+07:00

Ba Ria - Vung Tau (BRVT) is a province with a lot of potential for industrial development and is prioritizing attracting investment in supporting industry development - an industry group that almost always needs the plating process to complete product improvement. However, in project investment approval, projects with production technology processes including the plating process will encounter barriers due to Decision No. 2214/QD-UBND dated August 16, 2016 of the People's Committee of BRVT province. Therefore, it is necessary to develop a set of appropriate criteria to evaluate production and waste treatment technology to have a basis for adjusting investment attraction criteria more appropriately for the above industry group. The study analyzed the current state of operations of steel product factories in the province, focusing on projects with galvanizing processes. Actual investigation and collection of detailed assessments of production technology and waste treatment technology at factories. Combined with the expert consultation method and Analytical Hierarchy Process method, the study has screened and proposed an appropriate set of criteria to evaluate production technology and environmental treatment at steel product manufacturing facilities. The hot-dip galvanizing process includes 04 groups of criteria with 11 specific criteria. Initially, the assessment was applied at 5 factories manufacturing and processing steel products. According to the evaluation results, the selected factories are all classified as having a fair and high level of suitability in production technology and waste treatment. This result shows that the factories pay great attention to production technology and environmental treatment. In addition, the study has proposed directions to adjust criteria for considering and attracting investment for industrial groups that use galvanizing in general and hot-dip galvanizing in particular in the province.

Performance comparison of conventional biological treatment process and membrane bioreactor treating common industrial effluent

2025-06-23T14:39:17+07:00

Industrial effluent is challenging for wastewater treatment plants due to its complexity, toxicity and variable composition This study aimed to evaluate the efficiency of industrial wastewater treatment after a primary sedimentation tank using lab-scale membrane bioreactor (MBR), and a full-scale anoxic/oxic process. The results showed that the treated water quality from both systems was similar and satisfied the national effluent standard (column B of QCVN 40-MT:2011/BTNMT). The removal rates of COD, TN, TP and color of activated sludge process in industrial zones were 234 ± 119, 16 ± 3, 0.3 ± 0.2, 100 ± 120 mg/L.day, respectively. The removal rates of COD, TN, TP, and color in MBR were 1.6, 1.3, 10.3, and 2.1 times higher than those in the A/O process, respectively. Although the A/O process in industrial zones performed well, the MBR system demonstrated higher removal rates, particularly for nutrient removal. Besides, MBR systems offer several advantages, including reduced excess sludge production and less space requirements compared to A/O process. In general, MBR offers a promising solution for industrial wastewater treatment, with strong potential for application in industrial zones.

VNUHCM Journal of Earth Science and Environment

Developing a set of appropriate criteria on production technology and environmental treatment for steel product manufacturing facilities with hot dip zinc plating process in Ba Ria - Vung Tau Province

Performance comparison of conventional biological treatment process and membrane bioreactor treating common industrial effluent