Fracturing for In-situ Bioremediation (Available only in Focus on Geo/Environmental Special Issue)

by Sankar N. Venkatraman, McLaren/Hart Environmental Engineering Corp., Warren, NJ,
John R. Schuring, (M.ASCE), Prof.; New Jersey Institute of Technology, Newark, NJ,
Thomas M. Boland, Development Engr.; New Jersey Institute of Technology, Newark, NJ,
David S. Kosson, Prof.; Rutgers Univ., Piscataway, NJ,

Serial Information: Civil Engineering—ASCE, 1996, Vol. 66, Issue 3, Pg. 14A-16A

Document Type: Feature article


A pilot-scale evaluation of an integrated pneumatic fracturing and bioremediation system demonstrated the enhanced removal of BTX from a gasoline-contaminated, low-permeability soil formation. The fracturing enhanced subsurface permeability by an average of more than 36 times and established an extended bioremediation zone supporting aerobic, denitrifying and methanogenic populations. Subsurface amendment injections consisting of phosphate and nitrogen were made over a 50-week period to stimulate microbial activity. Results indicate that 79% of the soil-phase BTX was removed during the field test, with over 85% of the mass removed attributable to bioremediation.

Subject Headings: Field tests | Cracking | Subsurface environment | Pneumatic systems | Permeability (soil) | Soil tests | Pollution

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