Study of sewage oxygenation treatment based on gas magnetization mechanism. (14th November 2022)

• Record Type: Journal Article
• Authors: Zhao, Keli; Wu, Hui; Zhao, Xianghe; Liu, Yuqi; Yu, Aiwei; Man, Zunhai
• Is Part Of: Water science and technology. Volume 86:Number 10(2022)
• Page Start: 2545
• Page End: 2554
• Publication Date: 2022-11-14
• Subjects: effect of increasing oxygen -- gas magnetization -- gas-liquid fusion -- magnetic characteristics -- sewage aeration treatment; Water -- Pollution; Sewage -- Purification; Water quality management; Periodicals; 628.168
• DOI: 10.2166/wst.2022.361
• Languages: English
• ISSNs: 0273-1223

Abstract

Abstract: In the process of sewage treatment, the sewage usually needs to be aerated, so the oxygenation efficiency is an important indicator for the aerator. The general oxygenation technique is to inject large amount of natural air into the aeration tank over long time, which has lower efficiency and leads to dramatic waste of energy. Based on the gas-liquid fusion mass transfer model and combined the oxygen enrichment mechanism by magnetization of the gas into the aerator, a novel method to improve the efficiency of wastewater oxygenation is proposed. This method is based on the fact that oxygen and nitrogen exhibit completely different magnetic characteristics in gradient magnetic fields, and then the special shaped permanent magnets can be used to build a target gradient magnetic field to increase the oxygen content as the gas is injected into the sewage by the aerator, which reaches the oxygenation enhancement effect. Through theoretical analysis and experiments, it is concluded that the efficiency of sewage oxygenation treatment is dramatically improved with the permanent magnet oxygen enrichment technique. HIGHLIGHTS: A new method is introduced to improve the aerator's oxygenation effect, and the method is proven to be effective through theory and experiment. The method uses a magnetized oxygen enrichment device installed on the aerator, which consists of permanent magnets with a triangular cross section. The permanent magnets in the device build up a high gradient non-uniform magnetic field. Graphical Abstract