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LECTURE 12 BIOREMEDIATION - MIT OpenCourseWare

LECTURE 12 BIOREMEDIATIONB ioremediationBioremediation is the use of microorganisms to destroy or immobilize waste materialsMicroorganisms include:Bacteria (aerobic and anaerobic)FungiActinomycetes (filamentous bacteria) BIOREMEDIATION mechanismMicroorganisms destroy organic contaminants in the course of using the chemicals for their own growth and reproductionOrganic chemicals provide:carbon, source of cell building material electrons, source of energyCells catalyze oxidation of organic chemicals (electron donors), causing transfer of electrons from organic chemicals to some electron acceptorElectron acceptorsElectron acceptors:In aerobic oxidation, acceptor is oxygenIn anaerobic, acceptor is (with decreasing efficiency):nitratemanganeseironsulfateM icroorganisms also need essential nutrients such as nitrogen and phosphoruspE-10-50+5+10+15 AEROBIC RESPIRATIONIRON REDUCTIONSULFATE REDUCTIONNITRATE REDUCTIONMANGANESE REDUCTIONMETHANE FERMENTATIONDENITRIFICATIONI mage adapted from: Wiedemeier, T.

May 11, 2004 · with Long-Term Monitoring for Natural Attenuation of Fuel Contamination in Groundwater. Air Force Center for Environmental Excellence, San Antonio, Texas. ... and explosives concentration are monitored. At the completion of the composting period the windrows would be disassembled and the compost is taken to the final disposal area. ...

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