Co-immobilized aerobic/anaerobic mixed cultures in stirred tank and gaslift loop reactors

John, Gernot T.; Schügerl, K.

doi:10.1016/0168-1656(96)01553-2

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…Moreover, a combination of anaerobic (reductive) and aerobic (oxidative) conditions is often required to achieve mineralization rather than partial transformation of complex organic molecules. Although combined anaerobic/aerobic treatment can be achieved in a sequential reactor system (1), recent advances in the development of coupled anaerobic/aerobic systems have demonstrated that a steep oxygen gradient across a biofilm can be exploited to create combined anaerobic/aerobic conditions in a single reactor volume (2)(3)(4). Successful examples of anaerobic/aerobic coupling include degradation of azo dyes (5) and chlorinated organic compounds (2,(6)(7)(8).…”

Section: Introductionmentioning

confidence: 99%

Trichloroethylene Degradation in a Coupled Anaerobic/Aerobic Reactor Oxygenated Using Hydrogen Peroxide

Tartakovsky

Manuel

Guiot

2003

Environ. Sci. Technol.

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In this work, trichloroethylene (TCE) degradation under combined anaerobic-aerobic conditions was studied in an ethanol-fed biofilm reactor oxygenated using hydrogen peroxide. The reactor was inoculated with a biomass originating from an anaerobic digestor. Granulated peat was added to the reactor as a substratum for biofilm development. Extensive characterization of reactor populations using activity tests and PCR analysis revealed the development of a mutualistic consortium, particularly methanotrophic and methanogenic microorganisms. This consortium was shown to degrade TCE by a combination of reductive and oxidative pathways. A near complete degradation of TCE at a load of 18 mg L(R)(-1) day(-1) was evidenced by a stoichiometric release of inorganic chloride.

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Section: Introductionmentioning

confidence: 99%

Trichloroethylene Degradation in a Coupled Anaerobic/Aerobic Reactor Oxygenated Using Hydrogen Peroxide

Tartakovsky

Manuel

Guiot

2003

Environ. Sci. Technol.

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“…In the first step, the hard biodegradable organics diffused into the core of carrier from liquid bulk due to the concentration gradient; in the second step, the hard biodegradable organics were degraded by anaerobic hydrolization and acidification processing and converted into biodegradable organics, such as volatile fatty acids; in the third step, the biodegradable intermediate products diffused to the liquid bulk from carrier; finally, the biodegradable intermediate products were degraded by aerobic microorganisms, in the liquid bulk immediately. The synergetic effects between aerobic and anaerobic degradation were remarkably enhanced in the integrated IALR [26,27]. The anaerobic degradation, which converted the hard biodegradable organics to a substance that could be consumed by the aerobic microorganism, facilitated the aerobic process; at the same time, the continuous consumption of anaerobic product by aerobic metabolism, enhanced the anaerobic hydrolyzation and acidification against the negative effects of the accumulation of the anaerobic products.…”

Section: -3 Discussion On the Effects Of Microbial Carriersmentioning

confidence: 96%

Integrated anaerobic/aerobic biodegradation in an internal airlift loop reactor for phenol wastewater treatment

Zhao

Jiang

et al. 2009

Korean J. Chem. Eng.

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Anaerobic and aerobic biodegradation were integrated in an internal airlift loop reactor (IALR) by adding porous microbial carriers. In this bioreactor, aerobic activated sludge was suspended in the liquid bulk, while the anaerobic microbes were attached within the core of carriers. The integrated IALR was applied to the treatment of synthetic phenol wastewater. After 50 days' acclimation according to co-substance strategy, the influent COD decreased from 3,700 mg/L to 400 mg/L (phenol removal rate was over 99%) with the residence time of 24 h. High performance could be achieved under the operation condition of superficial gas flow rate higher than 0.07 cm/s, temperature beyond 15 o C and the microbial carrier volume fraction larger than 5%. Integration of anaerobic/aerobic biodegradation in IALR enhanced the synergetic effects between aerobic and anaerobic degradation; therefore, it has great potential in the treatment of phenol wastewater and other wastewater containing hard biodegradable organics.

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“…Successful co‐immobilization of aerobic and anaerobic species was demonstrated recently for ethanol production from starch (2, 3), nitrogen removal (4 − 6), and mineralization of chlorinated aliphatics (7).…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Co-immobilized Aerobic/Anaerobic Mixed Cultures

1998

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Systems of co-immobilized microorganisms are highly effective for conducting two or more consecutive bioprocesses within close proximity of the source and the sink of substrates. In this work, a general model of a co-immobilized aerobic/anaerobic bacterial system was developed and analyzed. The model was used to optimize pellet design and to study the effect of slow cell growth on process efficiency. The analysis demonstrated that co-immobilization of bacterial species accelerates the rate of biotransformation and provides complete transformation of toxic intermediates.

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Co-immobilized aerobic/anaerobic mixed cultures in stirred tank and gaslift loop reactors

Cited by 8 publications

References 7 publications

Trichloroethylene Degradation in a Coupled Anaerobic/Aerobic Reactor Oxygenated Using Hydrogen Peroxide

Trichloroethylene Degradation in a Coupled Anaerobic/Aerobic Reactor Oxygenated Using Hydrogen Peroxide

Integrated anaerobic/aerobic biodegradation in an internal airlift loop reactor for phenol wastewater treatment

Modeling and Analysis of Co-immobilized Aerobic/Anaerobic Mixed Cultures

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