Title: Application of micro nano bubble technology in water level recovery of water conservancy construction engineering

Authors: Dongling Zhang; Yuzhen Wang; Fei Luo

Addresses: Department of Civil Engineering, Henan Vocational College of Water Conservancy and Environment, Zhengzhou, 450008, China ' Department of Civil Engineering, Henan Vocational College of Water Conservancy and Environment, Zhengzhou, 450008, China ' School of Mechanical Engineering, Henan University of Engineering, Zhengzhou, 451191, China

Abstract: In order to improve the removal efficiency of groundwater pollutants, improve the ability of groundwater restoration and water level recovery, a micro nano bubble enhanced remediation technology was proposed. A micro and nano bubble micro observation system was designed, including camera, micro lens, laser and image processing software. Combined with particle size analyser and interface potential analyser, the basic physical characteristics and migration characteristics of micro and nano bubbles were analysed. According to the obtained characteristics, the particle size distribution and interfacial potential characteristics of microbubbles are obtained, the existence time and gas mass transfer effect of microbubbles in water body are verified, and the migration rule of microbubbles in water body and porous media is obtained. The numerical simulation results show that the micro and nano bubbles have high mass transfer efficiency and long existence time, which can effectively improve the dissolved oxygen of groundwater, improve the activity of microorganisms, achieve the effective removal of pollutants, and promote the in-situ remediation of polluted groundwater.

Keywords: microbubble technology; water conservancy construction engineering; water level recovery; mass transfer effect; ozone; observation system.

DOI: 10.1504/IJNT.2022.129759

International Journal of Nanotechnology, 2022 Vol.19 No.12, pp.1177 - 1194

Received: 28 Nov 2020
Accepted: 08 Mar 2021
Published online: 25 Mar 2023 *

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