Removal of mixtures of acetaldehyde and propionaldehyde from waste gas in packed column with immobilized activated sludge gel beads

Ibrahim, Mohd Adly; Mizuno, H.; Yasuda, Yoshimasa; Fukunaga, Kimitoshi; Nakao, Katsumi

doi:10.1016/s1369-703x(00)00132-7

Cited by 16 publications

(12 citation statements)

References 18 publications

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“…Examples include wood chips or barks (Luo, 2001), perlite (Woertz et al, 2002), vermiculite (Pineda et al, 2000), glass beads (Zilli et al, 2000), polyurethane foam (Moe and Irvine, 2000), polystyrene (Arulneyam and Swaminathan, 2000), lava rock (Chitwood and Devinny, 2001), etc. Ibrahim et al (2001) prepared a filter bed composed of activated sludge immobilized on gel beads. Christen et al (2002) and Sene et al (2002) developed a sugarcane-baggasebased bed, for the treatment of ethanol and benzene.…”

Section: Biofilter Bedmentioning

confidence: 99%

Bioreactors for treatment of VOCs and odours – A review

Mudliar

Giri

Padoley

et al. 2010

Journal of Environmental Management

432

187

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Section: Biofilter Bedmentioning

confidence: 99%

Bioreactors for treatment of VOCs and odours – A review

Mudliar

Giri

Padoley

et al. 2010

Journal of Environmental Management

432

187

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“…During the immobilization it is possible to handle high cell concentration in the reactor, increasing its efficiency, the loss of biomass is reduced avoiding the wash out and the stability of the immobilized cells is increased (Park et al 2002). Moreover, there is no cell growth, and then the sludge production is reduced (Chena et al 2002;Adly et al 2001). There are different immobilization methods as carrier-bonding, crosslinking, and encapsulation and the materials for the immobilization used can be natural or synthetic polymers.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of wastewater pollutants by activated sludge encapsulated inside calcium-alginate beads in a tubular packed bed reactor

Sergio

Bustos

2009

Biodegradation

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The wastewater treatment plants produce large quantities of biomass (sludge) that require about one-third of the total inversion and operation plant costs for their treatment. By the microorganisms immobilization it is possible to handle high cell concentration in the reactor, increasing its efficiency, reducing the loss of biomass and the wash out is avoided. Moreover, there is no cell growth then the sludge production is reduced. In this study, the COD removal and VSS variation were modeled in a tubular reactor with activated sludge immobilized in Ca-alginate. Moreover, two aspects that are commonly not considered in the performance of the actual reactors of this kind were introduced; the performance in non-steady state and the dispersion effect. The model was calibrated with an actual wastewater taken out from a Mexican wastewater treatment plant. The results of the performance of the tubular bioreactor at different scenarios (i.e., different residence time and VSS in the reactor) are presented. With longer residence times and higher VSS concentration in the Ca-alginate beads in the tubular bioreactor it is possible to increase the time operation of the bioreactor and to treat higher volumes of wastewater. During the process, the sludge generation was drastically reduced and it is possible to remove nitrogen form the wastewater making this process more attractive.

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“…Next to biofi lters, biotrickling fi lters have been used to remove odorous VOCs. Again, high removal effi ciencies have been obtained for aldehydes, alcohols, and volatile fatty acids (Chang and Lu, 2003;Chua et al, 2000;Ibrahim et al, 2001;Kirchner et al, 1991), even at low EBRT. Kirchner et al (1987), for instance, showed > 90% removal effi ciencies for compounds like aldehydes and alcohols at 5 ppmv to 40 ppmv infl uent concentrations and 2.4 s EBRT.…”

Section: Removal Of Odorous Vocsmentioning

confidence: 98%