Application of pre-ozonation + MBR + post-ozonation process in the reconstruction of wastewater treatment plants in coking parks

The pre-ozonation + MBR + post-ozonation process is a comprehensive treatment solution widely used in the renovation of wastewater treatment plants in coking industrial parks. This process integrates pretreatment, biochemical treatment, and advanced treatment through multi-stage oxidation and membrane separation technology. It effectively removes organic matter, nitrogen, phosphorus, and micropollutants from wastewater, achieving efficient, reliable, and energy-efficient wastewater treatment.

The process consists of two main stages:

Stage 1: Pre-ozonation. This pretreatment process is performed before the wastewater enters the MBR. The pre-ozonation process effectively oxidizes and decomposes organic matter in the wastewater, reducing COD levels early and ensuring more stable water quality before entering the MBR.

Stage 2: MBR + post-ozonation. In the MBR biochemical reaction tank, organic matter, nitrogen, phosphorus, and other substances in the water are biochemically degraded and purified. Membrane separation technology effectively removes contaminants. In the post-ozonation stage, organic matter and micropollutants in the wastewater are further thoroughly decomposed and oxidized.

This two-stage process achieves efficient, comprehensive, and thorough wastewater treatment. First, pre-ozonation effectively pre-treats wastewater, improving the water quality and treatment effectiveness of the MBR. Second, the MBR membrane separation technology deeply filters the wastewater, removing small-molecule organic matter and micropollutants. Finally, post-ozonation further enhances the oxidation reaction, thoroughly breaking down recalcitrant substances in the wastewater, thereby achieving efficient wastewater purification.

The pre-ozonation + MBR + post-ozonation process has demonstrated excellent operational results in the renovation of a wastewater treatment plant in a coking industrial park. This process solution provides stable and efficient comprehensive wastewater purification and treatment, effectively removing organic matter, nitrogen, phosphorus, and other pollutants. It contributes positively to water quality purification, energy conservation, improved treatment efficiency, and environmental protection.