Pollution Engineering - March 2009 - (Page 28)

Getting Rid of FOREIGN OIL “ In practice, oxygen is typically the principal growth-limiting factor for COC-degrading microbes. growth-limiting factor for COC-degrading microbes. Oxygen can be added using in-situ mechanical systems (e.g. air sparging, soil vapor extraction, biosparging, bioventing); by Direct push rigs can penetrate many surfaces injecting industrial grade including concrete, asphalt or even frozen ground. oxygen; through hydrogen peroxide infiltration; by injecting a pro- non-oxygen electron acceptors to biodepriety compound; or by injecting ozone. grade COCs. Enhanced anaerobic bioremeEnhanced aerobic bioremediation may diation may also be defined as the addition treat most organic chemicals, but is gen- of an electron donor species to promote erally a much less aggressive technology the reductive dechlorination process. Nonoxygen electron acceptors include sulfate, than chemical oxidation. Enhanced anaerobic bioremediation: nitrate, ferric iron, manganese IV, or CO2. A Anaerobic bioremediation is a biotic pro- sufficient amount of these electron accepcess in which microorganisms may utilize tors and/or substrates are required to sus- tion process. Biostimulation can be classified as either aerobic or anaerobic. Enhanced aerobic bioremediation: Aerobic bioremediation is a biotic process in which indigenous or supplemental microorganisms (bioaugmentation) residing in soil and groundwater use oxygen as an electron acceptor to biodegrade COCs. Degradation is accomplished when microbes transfer electrons from the COCs (electron donor) to oxygen (electron acceptor) via biological processes, and subsequently the COCs undergo transformation to less harmful end products (generally water and CO2 gas). In order for the microorganisms to proliferate, a sufficient amount of oxygen must be available. In practice, oxygen is typically the principal ” Building Solutions That Minimize Your Risk Pre-engineered, prefabricated buildings deliver innovative, code-compliant fire protection, safe storage and workspace solutions. • • • • • Reduce risk and liability Custom-built units fit the way you work Meets supply-chain value goals Fast turnaround Efficient on-site set-up GSA Contract No. GS-28F-1099C DLA Contract No. SPM500-01-D-0108 Safety. Efficiency. Value. Hazardous material containment systems designed for the way you work™. Safety Storage Inc. 1-800-344-6539 www.SafetyStorage.com PLE03094Fluidmet.indd 1 28 Pollution Engineering MARCH2009 PLE03094SAFE.indd 1 2/2/09 4:12:17 PM 2/2/09 4:09:43 PM

Table of Contents Feed for the Digital Edition of Pollution Engineering - March 2009

Pollution Engineering - March 2009 Contents The Editor’s Desk EnviroNews PE Events Legal Lookout Green Connections Get Ready to Count Carbon Getting Rid of Foreign Oil Green Goes Underground Thermal Oxidizers Ocean-Front Remediation Pumps, Pipes and Valve Products Air Monitoring Equipment PE Products Classified Marketplace Advertisers Index State Rules

Pollution Engineering - March 2009

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.