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DEMONSTRATION BULLETIN: NEW YORK STATE MULTI-VENDOR BIOREMEDIATION - R.E. WRIGHT ENVIRONMENTAL, INC.'S IN-SITU BIOREMEDIATION TREATMENT SYSTEM
Citation:
Skovronek, H. DEMONSTRATION BULLETIN: NEW YORK STATE MULTI-VENDOR BIOREMEDIATION - R.E. WRIGHT ENVIRONMENTAL, INC.'S IN-SITU BIOREMEDIATION TREATMENT SYSTEM. EPA/540/MR-95/525, 1995.
Impact/Purpose:
information
Description:
The R.E. Wright Environmental, Inc.‘s (REWEI) In-situ Bioremediation Treatment System is an in-situ bioremediation technology for the treatment of soils contaminated with organic compounds. According to the Developer, contaminated soils are remediated in-situ by stimulating the activity of indigenous soil microbes through the introduction of essential nutrients, an easily oxidized co-substrate and an electron acceptor. The technology’s primary nutrient amendment, essential for microorganism growth, is nitrogen in the form of gaseous anhydrous ammonia. The technology uses methane as the easily oxidized co-substrate. Methane stimulates the growth of methanotrophic organisms and induces the production, of an enzyme (methane monoxygenase) capable of degrading Idw molecular weight chlorinated alkanes and alkenes. The electron acceptor for the aerobic methanotrophic enzyme system is oxygen. Oxygen is distributed throughout the treatment zone at atmospheric concentrations by use of an air injection system. Depending on the contaminants’ phase and volatility, and particularly during the early stages of remediation when the microbial consortium has not had adequate time to become established, a certain portion of the contaminant mass is removed from the soil by vapor extraction/air stripping. The Developer maximizes biodegradation as the principal mechanism for contaminant reduction by limiting vapor extraction to only the level necessary to meet biological oxygen demand.