Selection of Bioreactor Media for Odor Control

Govind, Rakesh; Narayan, Sandeep

doi:10.1007/3-540-27007-8_4

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…Polyurethane (PU) foams have been successfully used for treating H 2 S in fouled airstreams , , wherein the biofilters have not suffered from clogging issues − due to low biomass yield in the absence of carbon source. However, emission of odors during the start-up (acclimation) period is still an issue with PU foam biofilters used for treating H 2 S from wastewater treatment plants .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Biofiltration Using Cell Attachment Promotors

Goncalves

Rao

2009

Environ. Sci. Technol.

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H2S polluted airstreams were treated in two biotrickling filter columns packed with polyurethane (PU) foam cubes, one with cubes coated with a solution of 25 mg/L of polyethyleneimine (PEI, coated reactor) and the other containing just plain PU cubes (uncoated reactor) at empty bed residence times (EBRT) ranging from 6 to 60 s. and inlet H2S concentrations ranging from 30 to 235 ppm, (overall loads of up to 44 gH2S/m3bed/h), with overall removal efficiencies (RE) in the range of 90-100% over 125 days. The acclimatization characteristics of the coated reactor outperformed those of the uncoated one, and both the observed elimination capacity (EC) of 77 gH2S/m3bed/h and retention of volatile solids (VS) of 42 mgVS/cube were maxima in the coated reactor. Insights into the controlling removal mechanisms were also provided by means of dimensionless analysis of the experimental data. Denaturing gradient gel electrophoresis (DGGE) showed that the dominant surviving species in both units belonged to the genus Acidithiobacillus.

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Section: Introductionmentioning

confidence: 99%

Enhanced Biofiltration Using Cell Attachment Promotors

Goncalves

Rao

2009

Environ. Sci. Technol.

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“…Leon The specific area is also an important factor to describe the packing material as Delhomonie et al [25] showed that toluene elimination rate increased from 45 to 180 g m -3 h -1 when the specific area of the compost increased from 125 to 590 m 2 m -3 . The specific area of medium used is in the range of most synthetic media (100-980 m -1 ) [27] which is an advantage for the packing material.…”

Section: Packing Materialsmentioning

confidence: 99%

Volatile Organic Compounds (VOCs) Biofiltration with Two Packing Materials

Gracy¹,

Hort²,

Platel³

et al. 2006

Environmental Technology

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The treatment of a gas stream containing a mixture of acetone, toluene and trichlorethylene (TCE) was tested in two biofilters packed with compost only (biofilter B1) or a mixture of pozzolan and compost (biofilter B2). The biofilter performance was evaluated at VOCs concentration of 101 mg m(-3) of acetone - 210 mg m(-3) of toluene - 89 mg m(-3) of TCE and air flow of 0.8 m(3) h(-1). Inocula were provided by the compost native microflora and microbial growth was enhanced by periodically adding an average of 150 ml of a commercial nutrient solution to each biofilter. Pollutant removal efficiencies of 100% (acetone loading of 7-13 g m(-3) h(-1)) and 80% (toluene loading of 17-21 g m(-3) h(-1)) were achieved for acetone and toluene, respectively, in biofilter B1. By comparison, these values were 100% (acetone loading of 6-11 g m(-3) h(-1)) and 90% (toluene loading 16 - 27g m(-3) h(-1) and after the complete re-moisturization of the porous medium) in biofilter B2. TCE was not eliminated in either of the biofilters tested. The compost was a good packing material which also provided a suitable microbial flora for the quick decomposition of acetone and toluene, however it was subject to clogging. Mixing this material with pozzolan solved this problem and enabled the biofilter capacity to be maintained over a long period of time.

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“…Its main function is to promote the contact between contaminants and microorganisms to generate a stable biofilm. The biofilm covers each particle of the packing media and grows as a result of pollutant degradation or by consuming the carbon and nitrogen sources contained in the carrier 1. Packing material can be defined as a solid phase on which adhesion of microorganisms takes place, resulting in the development of the biofilm 2.…”

Section: Introductionmentioning

confidence: 99%

“…Also, organic packing materials have limited lifetime because they tend to compact and thus increase pressure drops in the system. This affects the operational costs of biofilters due to higher energy consumption 1. On the other hand, inert packing materials present some advantages, but they are also linked to problems when excessive biomass growth is present in biofilters 4.…”

Section: Introductionmentioning

confidence: 99%

Batch biodegradation of hydrocarbon vapors using a modified polymeric support

Gutiérrez-Acosta

Escobar-Barrios

Arriaga

2010

J of Chemical Tech & Biotech

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BACKGROUND: One of the major problems facing biofilter operation is the long start-up periods, which is related to microbial adhesion in packing materials among other factors. In order to deal with this limitation, modifying a hydrophobic polymer with an additive containing hydroxyl groups was proposed to improve the water retention capacity of the material in the biodegradation of a mixture of hydrocarbon vapors in batch tests.

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Selection of Bioreactor Media for Odor Control

Cited by 5 publications

References 23 publications

Enhanced Biofiltration Using Cell Attachment Promotors

Enhanced Biofiltration Using Cell Attachment Promotors

Volatile Organic Compounds (VOCs) Biofiltration with Two Packing Materials

Batch biodegradation of hydrocarbon vapors using a modified polymeric support

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