REMEDIATION OF BENZENE-CONTAMINATED AQUIFERS BY FLUSHING AND BIO-SPARGING METHOD

Abstract

  Biosparging method is an effective technology that remedies benzene-contaminated soils. This method enable to do physical removal of benzene by vaporization with supplying air into aquifer, also encourages biodegradation. However, since the efficient supply method of trofic salts has not exist yet, it has been difficult to do biodegradation continuously. The biosparging method which used soil flushing together that supplies trofic salts effectively under the ground has been developed. This original method was demonstrated its effectiveness through in-situ test, and discussed from the perspective of remediation rate and ability to supply air and trofic salts. As a result, proposed flushing and biosparging method was confirmed superiority compared with the conventional method. In addition, based on a result of the test, a designing method on well layout, sparging air rate and remediation term has also proposed.