In their absence, the injected air will flow up along the well bore and the well will be.glass beads and model homogenous and heterogeneous subsurface hydrogeologic settings were simulated. seals are critical to successful air sparging operation. It is important to ensure a good annular air flow seal between the top of the screened interval and. Treatment zone increases with increasing separation. The primary intention of air sparging is to promote biodegradation of volatile organic compounds (VOCs) in the groundwater passing through the treatment sector. Use of Surfactants to Decrease Air-Water Interfacial Tension During SpargingĪir sparging is a remediation procedure of injecting air into polluted ground water. However, beyond a certain value of effective sparging pressure ratio, there is no further enlargement of the ZOI. With a further increase in air injection pressure, the cone angle reaches a constant value while the lateral intrusion becomes the main contributor to the enlargement of the ZOI. The test results also show that with increasing sparging pressure, the zone of influence (ZOI), which consists of the width at the tip of the cone or lateral intrusion and the cone angle, will lead to an increase in both lateral intrusion and the cone angle. This variation of the slope of mass flow rate of air sparging volume versus effective sparging pressure ratio, M, is linear with g-level confirming that the air flow through soil for a given effective sparging pressure ratio only depends on the g-level. Also the slope of mass flow rate with effective sparging pressure ratio increases with higher g-levels. The air mass flow rate increases linearly with the effective sparging pressure ratio, which is the difference between sparging pressure and hydrostatic pressure normalized with respect to the effective overburden pressure at the sparging point. The test results show that with the increase in sparging pressure the mass flow rate of the air sparging volume increases. In this study, centrifugal modeling tests were performed to investigate air flow rates and the evolution of the zone of influence during the air sparging under various g-levels. However, in spite of the success of air sparging as a remediation technique for the cleanup of contaminated soils, to date, the fundamental mechanisms or the physics of air flow through porous media is not well understood. Hu, Liming Meegoda, Jay N Du, Jianting Gao, Shengyan Wu, XiaofengĪir sparging (AS) is one of the groundwater remediation techniques for remediating volatile organic compounds (VOCs) in saturated soil. Centrifugal study of zone of influence during air-sparging.
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