METHOD AND SYSTEM USING MICRO/NANO BUBBLES FOR ENHANCED IN SITU REMEDIATION OF POLLUTED GROUNDWATER

摘要

Provided is a method using micro/nano bubbles for enhanced in situ remediation of polluted groundwater, comprising: arranging a water injection pipe (7) at an upstream location of an area where groundwater is polluted; introducing thereto a micro/nano bubbles-containing water having nutrient salt(s) therein; transferring the micro/nano bubbles-containing water having nutrient salt(s) with the movement of groundwater to the polluted area, decomposing organic pollutants or continuously replenishing electron acceptor(s)/donor(s) for microorganisms to facilitate the degradation and removal of the organic pollutants; meanwhile, arranging a water extraction pipe (17) at the downstream of the polluted area to extract water and form a groundwater flow-field; setting up a monitoring well for real-time monitoring and analyzing of parameters during the removal process of the organic pollutants and adjusting the occurrence time and the amount of aeration of the micro/nano bubbles. Also provided is a system using the micro/nano bubbles for enhanced in situ remediation of the polluted groundwater. The micro/nano bubbles have a great oxygen-supplying effect, a long duration, and a large influence area, compensate for deficiencies of regular in situ remediation technologies such as natural degradation and bioventing, are of reduced costs and energy efficient, and are applicable in remediation of sites with a limited area and a high pollution load.