Development and Characterization of a Magnetically Agitated Photocatalytic Reactor for Water Recovery

Mazyck, David W.; Drwiega, Jack; Lee, Seung-Woo; Wu, Chang-Yu; Sigmund, Wolfgang M.; Chadik, Paul A.; Meisel, Mark W.; Park, Ju‐Hyun

doi:10.4271/2004-01-2404

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…The past few decades of research have focused on strategies to advance photocatalysis, especially with regards to the full-scale implementation of this technology. Early in the development of photocatalysis, an effective method to separate the nanosized photocatalyst from water was unknown, so researchers explored coating titania on reactor walls and wire mesh, supporting the titania on or within sorbents, and other engineering solutions (4)(5)(6)(7)(8)(9)(10). Concurrent to these efforts, a Canadian firm, Purifics, has solved, patented, and installed several photocatalytic reactors (Photo-Cat) with slurry separation and reuse using a backpulsed membrane (11).…”

Section: Introductionmentioning

confidence: 99%

Magnetically Agitated Photocatalytic Reactor for Photocatalytic Oxidation of Aqueous Phase Organic Pollutants

Kostedt

Drwiega

Mazyck

et al. 2005

Environ. Sci. Technol.

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A magnetically agitated photocatalytic reactor (MAPR) has been developed and assessed for oxidation of phenol. The MAPR uses a titanium dioxide composite photocatalyst with a ferromagnetic barium ferrite core. The catalyst motion was controlled with a dual-component magnetic field. First, a permanent magnet above the reactor provided a static magnetic field to counteract the force of gravity, hence increasing catalyst exposure to UV. Second, an alternating magnetic field generated by a solenoid was used to agitate the catalyst, thus increasing mass transfer between pollutants and byproducts to the catalyst. Optimal performance of the MAPR was achieved with the permanent magnet present and 1 A of alternating current to the solenoid between 20 and 80 Hz. Operating with a 60-Hz signal at 1 A with the permanent magnet present and 100 mg of catalyst, the system reduced an 11 mg/L phenol concentration by97% and decreased nonpurgeable dissolved organic carbon by 93% in 7 h using three 8-W 365-nm peak UV lamps.

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Section: Introductionmentioning

confidence: 99%

Magnetically Agitated Photocatalytic Reactor for Photocatalytic Oxidation of Aqueous Phase Organic Pollutants

Kostedt

Drwiega

Mazyck

et al. 2005

Environ. Sci. Technol.

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Simulation of a closed loop wastewater treatment system for extended space flight

Xia

Morse

Jackson

et al. 2008

2008 3rd IEEE Conference on Industrial Electronics and Applications

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It is estimated that one liter water sent into space by shuttle expend $22,000, so the research for recycle of water is important to spaceflight. A pilot-scale, closed-loop water recycling system has been run to imitate wastewater produced by space crew. A mathematical model of the individual reactor based on plug flow, as well as system level simulation has been developed for nitrification and denitrification. Two important parameters, Monod constant and reactor efficiency constant, are discussed. The system simulation combines nitrification, denitrification, recycle, and degassing steps, and it accurately reproduces the ammonia, nitrite, nitrate, and total nitrogen (TN) variation observed experimentally at a 20/1 recycle ratio. Both experiments and simulations indicate that biological closed loop wastewater treatment system has significant potential for long-duration manned space flight.

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Optimization of a Magnetically Agitated Photocatalytic Reactor for Water Recovery

Kostedt¹,

Mazyck²,

Wu³

et al. 2005

SAE Technical Paper Series

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Development and Characterization of a Magnetically Agitated Photocatalytic Reactor for Water Recovery

Cited by 4 publications

References 6 publications

Magnetically Agitated Photocatalytic Reactor for Photocatalytic Oxidation of Aqueous Phase Organic Pollutants

Magnetically Agitated Photocatalytic Reactor for Photocatalytic Oxidation of Aqueous Phase Organic Pollutants

Simulation of a closed loop wastewater treatment system for extended space flight

Optimization of a Magnetically Agitated Photocatalytic Reactor for Water Recovery

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