Comprehensive evaluation on the use of oxygen release compound in bioremediation
- Regenesis Bioremediation Products, San Juan Capistrano, CA (United States)
ORC{reg_sign} is a unique formulation of magnesium peroxide that releases oxygen slowly when hydrated. The compound is insoluble and releases oxygen while being converted to ordinary magnesium hydroxide which is also insoluble. ORC is packaged in exchangeable filter socks and is contacted with contaminated groundwater via an array of wells or trenches. ORC can also be made into a slurry for permanent applications in the saturated zone, or dispersed as a free powder for the in-situ or ex-situ treatment of soil. These methods help optimize the natural bioremediation of aerobically degradable compounds and are being used on over 2600 sites worldwide as a low-cost, passive bioremediation protocol. ORC mediated oxygenated zones generally last four months to a year as a function of contaminant flux. The objective of the {open_quotes}oxygen barrier{close_quotes} is plume cut-off; however, any significant reduction of contaminant mass will bring the control point back to the source and reduce risk. A broad array of treatment points, in which ORC is backfilled or injected, has been shown to be an effective source treatment. The points can be implemented with low-cost, small-bore technologies to achieve full remediation or risk reduction objectives. Free powder has traditionally been used by direct mixing of ORC into biopiles or in the floor of tank pit excavations to address residual hydrocarbons. An overview of the history of the environmental applications of ORC, and the evolution of the strategies for site closure involving direct treatment of contaminant sources and control of plume migration, will be presented. This will include (1) a compendium of oxygen barrier field results featuring several large-scale, fully monitored demonstrations, (2) results from several large-scale, fully monitored source treatment applications and (3) results from a variety of in-situ soil applications.
- OSTI ID:
- 569985
- Report Number(s):
- CONF-971116-; TRN: 98:000778-0049
- Resource Relation:
- Conference: 1997 petroleum hydrocarbons and organic chemicals in ground water: prevention, detection, and remediation conference, Houston, TX (United States), 12-14 Nov 1997; Other Information: PBD: 1997; Related Information: Is Part Of Proceedings of the 1997 petroleum hydrocarbons & organic chemicals in ground water: Prevention, detection, and remediation; PB: 811 p.
- Country of Publication:
- United States
- Language:
- English
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