Microbial Regeneration of the Adsorbents for the Cleaning of Triazine-contaminated Ground Water

Venus, Joachim; Beitz, H.; Spyra, Wolfgang

doi:10.1002/(sici)1521-4125(200001)23:1<26::aid-ceat26>3.0.co;2-z

Cited by 2 publications

(5 citation statements)

References 7 publications

(6 reference statements)

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“…Therefore, xylite is plentiful and inexpensive. It is suitable for use as an inert support medium since it has high porosity and large surface area for attaching and growing films of microorganisms (Venus et al 2000). Before starting the experiments, groundwater contaminated with diesel was recycled through the columns until saturation of xylite.…”

Section: Trickling-flow Fixed-film Reactor Configuration For Benzene mentioning

confidence: 99%

“…Venus et al used a coal-related organic material called xylite as a support on which the biofilm was found to be more stable than those grown on various inorganic media. Other advantages of the xylite are high sorption capacity promoting bioremediation processes, low cost, and very large available quantities (Venus et al 2000). Fixed-film reactors have been tested successfully with autochthonous microorganisms isolated from contaminated sites.…”

Section: Introductionmentioning

confidence: 99%

“…For example, microorganisms obtained from a kerosene groundwater spill were used for the degradation of benzene, toluene, ethylbenzene, xylene (BTEX), kerosene, and other organic substances (Winkelmann et al 2003). According to Venus et al, the trickle-flow fixed-film reactor permits one to obtain higher concentrations of microorganisms than in a fluidized-bed reactor (Venus et al 2000). Previous studies have shown that higher active biomass loading can achieve higher degradation rates in biological water purification processes .…”

Section: Introductionmentioning

confidence: 99%

“…The trickling flow ensures good distribution and long contact times of the polluted water with the biofilm (attached microorganisms) on the surface of the support. However, the tricklingflow fixed-film reactor has been tested only for rather low organic pollutant concentrations (Venus et al 2000;Oliveira et al 2004;Arcangeli and Arvin 1995).…”

Section: Introductionmentioning

confidence: 99%

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Biodegradation of High Concentrations of Benzene and Diesel in a Fixed-Film Reactor

Bravo

Spyra

Antaño-López

2009

Water Air Soil Pollut

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The degradation of benzene in groundwater at concentrations as high as 2,000 mg L −1 was studied using a four-column trickling-flow fixed-film biological reactor with recirculation. A decrease in the content of benzene was achieved, its concentration falling to 0.55 µg L −1 . On the contrary, high levels of diesel fuel were not diminished sufficiently with this mode of operation of the reactor. Thus, a submerged reactor was tested as a modification to the conventional trickling-flow configuration. This modified fixed-film reactor was effective when high loadings of diesel were present as an emulsion. The concentration of diesel was reduced from 2,000 to 0.12 mg L −1 after 8 days of treatment. In both cases, the reactors were packed with a carbonaceous material and were operated in semibatch mode with recirculation. The final concentration of benzene fell below the permissible limit established by Mexican law, and the results for both pollutants also met the concentration limits required by the German law for drinking water, 0.001 mg L −1 for benzene and 0.1 mg L −1 for total hydrocarbons.

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Section: Trickling-flow Fixed-film Reactor Configuration For Benzene mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biodegradation of High Concentrations of Benzene and Diesel in a Fixed-Film Reactor

Bravo

Spyra

Antaño-López

2009

Water Air Soil Pollut

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“…The combination of adsorption and biological techniques is a promising alternative. Such combined processes have already been developed with activated carbon (Feakin et al, 1995a;Jones et al, 1998;Venus et al, 2000) to concentrate atrazine onto the sorbent and thereby improve the efficiency of biological degradation in a "bioregeneration" stage (Feakin et al, 1995b). In our work, pine bark was selected as a cheap sorbent readily available in Portugal and in the south of France.…”

Section: Introductionmentioning

confidence: 99%

Biofiltration onto pine bark for the treatment of water contaminated with atrazine: influence of sorbent on Pseudomonas sp. strain adp

Gendrault

Bayard

Gourdon

2005

Agron. Sustain. Dev.

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To cite this version:Sophie Gendrault, Rémy Bayard, Rémy Gourdon. Biofiltration onto pine bark for the treatment of water contaminated with atrazine: influence of sorbent on Pseudomonas sp. strain adp. Agronomy for Sustainable Development, Springer Verlag/EDP Sciences/ INRA, 2005, 25 (2), pp.317-321. hal-00886280 317 Agron. Sustain. Dev. 25 (2005) 317-321Abstract -A combination of adsorption and biodegradation processes was studied as a potential for the treatment of water contaminated with atrazine. Pine bark was used as a cheap and readily available sorbent, and Pseudomonas sp. strain ADP as atrazine degrader. Pseudomonas sp. strain ADP was found to be able to grow in the aqueous bark extract and to use the soluble bark organics as carbon sources. However, a lag period of about 25 hours was observed in cultures in sterile bark extract for the growth and atrazine biodegradation as compared with the cultures grown in a mineral medium. In pine bark aqueous extract, Pseudomonas sp. strain ADP was shown to mineralize 75% of atrazine in 330 hours (initial concentration of 44.2 µg·L -1 ). The presence of sterile pine bark particles (liquid to solid ratio of 20) in mineral medium reduced the yield down to 50% due to atrazine sorption onto bark. atrazine / mineralization / adsorption / pine bark / Pseudomonas ADP sp. / water

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Microbial Regeneration of the Adsorbents for the Cleaning of Triazine-contaminated Ground Water

Cited by 2 publications

References 7 publications

Biodegradation of High Concentrations of Benzene and Diesel in a Fixed-Film Reactor

Biodegradation of High Concentrations of Benzene and Diesel in a Fixed-Film Reactor

Biofiltration onto pine bark for the treatment of water contaminated with atrazine: influence of sorbent on Pseudomonas sp. strain adp

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