Integrated nitrogen removal in compact systems by immobilized microorganisms: new-generation bioreactors

Santos, Vítor A. P. Martins dos; Tramper, J.; Wijffels, René H.

doi:10.1016/s1387-2656(08)70075-9

Cited by 8 publications

(1 citation statement)

References 217 publications

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“…Among them major drawbacks are (a) mass transfer limitations, (b) the accumulation of evolved gas, which reduces the useful volume, (c) the formation of preferential paths or channelling as well as short circuiting and (d) clogging. [56][57][58]. The fluidised bed bioreactors involve scaling up problems due to the difficulties in controlling the bed expansion and biofilm thickness, influent distribution devices and/or oxygen saturation systems [56] and may encounter hydrodynamic problems [58].…”

Section: Introductionmentioning

confidence: 99%

Performance of pulsed plate bioreactor for biodegradation of phenol

Shetty

Kalifathulla

Srinikethan

2007

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Performance of pulsed plate bioreactor for biodegradation of phenol

Shetty

Kalifathulla

Srinikethan

2007

Journal of Hazardous Materials

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Nitrification by immobilized cells in a micro‐ecological life support system using packed‐bed bioreactors: an engineering study

Pérez

Montesinos

Albiol

et al. 2004

J of Chemical Tech & Biotech

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The nitrifying component of a micro-ecological life support system alternative (MELISSA) based on microorganisms and higher plants was studied. The MELISSA system consists of an interconnected loop of bioreactors to allow the recycling of the organic wastes generated in a closed environment. Conversion of ammonia into nitrates in such a system was improved by selection of microorganisms, immobilization techniques, reactor type and operation conditions. An axenic mixed culture of Nitrosomonas europaea and Nitrobacter winogradskyi, immobilized by surface attachment on polystyrene beads, was used for nitrification in packed-bed reactors at both bench and pilot scale. Hydrodynamics, mass transfer and nitrification capacity of the reactors were analysed. Mixing and mass transfer rate were enhanced by recirculation of the liquid phase and aeration flow-rate, achieving a liquid flow distribution close to a well-mixed tank and without oxygen limitation for standard operational conditions of the nitrifying unit. Ammonium conversion ranged from 95 to 100% when the oxygen concentration was maintained above 80% of saturation. The maximum surface removal rates were measured as 1.91 gN-NH 4 + m −2 day −1 at pilot scale and 1.77 gN-NH 4 + m −2 day −1 at bench scale. Successful scale-up of a packed-bed bioreactor has been carried out. Good stability and reproducibility were observed for more than 400 days.

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