Biodegradation of chlorinated hydrocarbons in an immobilized bed reactor

Miller, Gary P.; Portier, Ralph J.; Hoover, Darryl G.; Friday, David D.; Sicard, Jerry L.

doi:10.1002/ep.670090316

Cited by 13 publications

(4 citation statements)

References 6 publications

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“…The treatability of halogenated hydrocarbons in a biological reactor has been demonstrated in previous field studies (Miller et al 1990). There, a 42 1 field pilot-scale reactor was used to remove ethylene dichloride (EDC) and trichloroethylene (TCE) from a contaminated groundwater stream.…”

Section: Halogenated Hydrocarbons Biotreatmentmentioning

confidence: 73%

Immobilized Microbe Bioreactors for Waste Water Treatment

Portier

Miller

1991

Waste Manag Res

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The application of adapted microbial populations immobilized on a porous diatomaceous earth carrier to pre-treat and reduce toxic concentration of volatile organics, pesticides, petroleum aliphatics and aromatics has been demonstrated for several industrial sites. In the pre-treatment of industrial effluents and contaminated groundwaters, these bioreactors have been used to optimize and reduce the cost of conventional treatment systems, i.e. steam stripping, carbon adsorption and traditional biotreatment. Additionally, these systems have been employed as seeding devices for larger biotreatment systems. The cost effective utilization of an immobilized microbe reactor system for water supply regeneration in a microgravity environment is presented. The feasibility of using immobilized biomass reactors as an effluent treatment technology for the biotransformation and biodegradation of phenols, chlorinated halocarbons, residual oils and lubricants was evaluated. Primary biotransformation tests of two benchmark toxicants, phenol and ethylene dichloride at concentrations expected in life support effluents were conducted. Biocatalyst supports were evaluated for colonization potential, surface and structural integrity, and performance in continuous flow bioreactors. The implementation of such approaches in space will be outlined and specific areas for interfacing with other non-biological treatment approaches will be considered for advanced life support, tertiary waste water biotreatment.

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Section: Halogenated Hydrocarbons Biotreatmentmentioning

confidence: 73%

Immobilized Microbe Bioreactors for Waste Water Treatment

Portier

Miller

1991

Waste Manag Res

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“…A rate of 1.83 mg TCE was degraded/hour/liter of reactor volume at 97.04% degradation efficiency (HRT of 6 hours). Miller, et al [28] reported that a bioreactor populated with Xanthobacter autotrophicus achieved 0.434 mg TCE degraded per hour per liter of reactor volume, with a 81.7% degradation efficiency at 21 hour residence time. Folsom and Chapman [12] [18] observed complete TCE removal by JMP134 in about 6 hours.…”

Section: Bioreactor Performancementioning

confidence: 99%

Performance Characterization of a Laboratory-Scale Bioreactor with Liquid Suspensions ofAlcaligenes EutrophusJMP134

McKay¹,

Morse²

1995

Hazardous Waste and Hazardous Materials

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Trichloroethylene (TCE) was degraded in a single-stage, continuously stirred tank reactor (CSTR) bioreactor containing pure cultures of liquid-dispersed Alcaligenes eutrophus JMP134. Phenol was supplied as the sole source of carbon and energy for induction of catabolic activities. Operating conditions were varied in a series of randomly ordered experiments. The independent variables were influent TCE concentration, influent phenol concentration, and hydraulic residence time. The dependent variable was the percent of influent TCE degraded or degradation efficiency. The highest degradation efficiency observed was 98.6%. An empirical equation was fitted to the data in the form of degradation efficiency as a function of the three independent variables. A close match was achieved between the equation and the data. This equation is valid only where the phenol was oxidized below the level of detection in the effluent (150 ug/L). This equation is useful for bioreactor design and operation.Hydraulic residence time was noted to have a relatively small effect on degradation efficiency. Phenol and TCE were competitive, as expected in a cometabolism system. The implication for bioreactor operation is that phenol levels must be closely matched to TCE levels for optimum performance.

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“…Biological treatment using microbial cultures has been studied by several researchers [15][16][17][18][19] where the results showed a good removal efficiency of hazardous organics. Humic soils provide a suitable habitat for a wide range of organisms and by enriching the soils with suitable mixed culture systems the hazardous organics can be degraded to complete mineralisation which can be exploited as a cost effective technology for reclamation of hazardous waste dumpsites and polluted ground waters.…”

Section: Introductionmentioning

confidence: 99%