Biodegradable contaminants

Bevrox Biotreatment, or liquid-solids contact (ESC) digestion, is a patented, ex situ process for the treatment of biodegradable contaminants in soil, groundwater, or process water. 

DO-IT has been used at several sites to treat benzene, toluene, ethyl benzene, and xylene (BTEX), methyl ferf-butyl ether (MTBE), and total petroleum hydrocarbons (TPH). According to the vendor, this technology may also be applied or modified to clean up any aerobically biodegradable contaminants in soil. 

The PetroClean bioremediation system treats biodegradable contaminants (i.e., gasoline, diesel fuel, aviation fuel, solvents, polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs), semivolatile organic compounds (SVOCs), total petroleum hydrocarbons (TPH), and other organic compounds in soils and groundwater. 

FACT is limited to treating biodegradable contaminants. It cannot treat metals, inorganic contaminants, or halogenated compounds. For sludge-type soils that are heavily contaminated with tar, some texture modification may be required prior to treatment. 

The Biodrain system is a patented, commercially available, in situ technology for the collection and treatment of biodegradable contaminants in soil and groundwater. The Biodrain system... 

Mixflo can only be used to treat aerobically biodegradable contaminants it cannot treat metals. In addition, the technology only treats slurries that can be pumped and can pass through a 0.5-inch mesh. 

Eliminates the need for surface water treatment may eliminate the need for surface vapor treatment for aerobically biodegradable contaminants in permeable soils. 

Levin and Gealt (1993, p. 4) estimated the costs of bio treatment of biodegradable contaminants in soils to range between 40 and 100 per cubic yard, as compared... 

Abiotic soil desorption measurements are probably the most important tests to precede measurement of microbial degradation. Desorption tests measure the site-specific soil/water partition coefficients for the contaminants of interest. Several experimental protocols are available for measuring partition coefficients (Wu Gschwend, 1986 Rogers, Tedaldi Kavanaugh, 1993). At the two extremes of bioavailability and biodegradability, contaminants can either be detected near their solubility limit or can be undetectable in the aqueous phase. Measurements of aqueous phase and soil phase concentrations in equilibrium may... 

Keywords Biodegradation Contaminated sediments techniques Nucleic acids 16S rRNA... 

All of us are familiar with the unfortunate oil spills that occur from time to time. Cleaning up these hydrocarbons is a problem, but patents have been issued for highly absorbent hollow spheres of beeswax that bind hydrocarbons, providing nutrients to naturally occurring microbes that create enzymes to biodegrade contaminants. ... 

Contaminated soils can be mixed with water and treated in a bioreactor to eliminate biodegradable contaminants in the soil. It is possible, in principle, to treat contaminated soils biologically in place by pumping oxygenated, nutrient-enriched water through the soil in a recirculating system. 

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