Studies on biodegradation of a mixture of toxic and nontoxic pollutant using Arthrobacter species

Kar, Sanjay Kumar; Swaminathan, T.; Baradarajan, A.

doi:10.1007/bf00369481

Cited by 19 publications

(11 citation statements)

References 5 publications

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“…The suitable acclimation method was very important for the removal of mixed substrates (Kar et al, 1996). Substrate and microbial interactions were observed for the removal of H2S and NH3 during the start-up period.…”

Section: Inoculation and Acclimationmentioning

confidence: 99%

“…Generally, substrate interactions and degradation patterns in biofilters will depend on the microbial community that is established in the column which, in turn may be a function of the acclimation history. The substrate interactions can be different even in the same microbial culture, depending on how the microbial culture was initially acclimated (Kar et al, 1996;Swaminathan et al, 1999). Once an adequate culture is established, the level of substrate interactions was somewhat reduced (Rozich and Colvin, 1986).…”

Section: Inoculation and Acclimationmentioning

confidence: 99%

“…Biofiltration system can be improved by optimizing bioreactor types and substrates acclimation strategy, besides packing material (Cho et al, 1992;Kar et al, 1996;Chung et al, 2007). Biofilters have been widely used in the removal of NH 3 or/and H 2 S. The low nitrification was caused by either the accumulation of S and N compounds on the packing (Kim et al, 2002), or acidification of the system (Chung et al, 2001).…”

Section: Chapter 1 Introductionmentioning

confidence: 99%

“…In addition, it was reported that substrates acclimation strategy was important for the removal of mixed substrates successfully ([Car et al, 1996). Through applying an optimal acclimation strategy, the removal of volatile organic compounds (VOCs) was enhanced greatly (Rozich and Colvin, 1986;Kar et al, 1996;Park, 2004). However, few studies have been found on applying a biotrickling filter and on optimizing substrates acclimation strategy for the co-removal of H2S and NH3.…”

Section: Chapter 1 Introductionmentioning

confidence: 99%

“…It was reported that suitable acclimation strategy was significantly important for biodegradation of mixed substrates successfully (Kar et al, 1996). Acclimation is a period required for the development of the optimum population of substrate-consuming microorganisms before they started the vigorous biodegradation (Jones et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Exhausted carbon for the removal of hydrogen sulfide and ammonia

Jiang¹

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Section: Inoculation and Acclimationmentioning

confidence: 99%

Section: Inoculation and Acclimationmentioning

confidence: 99%

Section: Chapter 1 Introductionmentioning

confidence: 99%

Section: Chapter 1 Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exhausted carbon for the removal of hydrogen sulfide and ammonia

Jiang¹

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Effect of Co‐Substrates on Aerobic Phenol Degradation by Acclimatized and Non‐acclimatized Enrichment Cultures

Bajaj

Gallert

Winter

2008

Engineering in Life Sciences

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Aerobic degradation of 7 mmol/L phenol in the presence of alternative carbon sources (7 mmol/L glucose or acetate or 1–2 mmol/L 2‐chlorophenol) was investigated using non‐acclimatized and acclimatized sewage sludges and enrichment cultures. The substrates represented an intermediate of phenol degradation (acetate), an independent substrate (glucose) or a “precursor‐substrate” of phenol degradation (2‐chlorophenol). Bacteria from sewage sludge, not pre‐adapted to phenol (2 mmol/L), rapidly respired acetate and glucose in the presence of phenol, whereas phenol was only bioconverted to any unknown aromatic metabolite after 24 h. In the presence of phenol and 2‐chlorophenol, no removal of both substances was observed when using the unacclimatized sludge. Sludge that was acclimatized to the degradation of phenol showed an initial preference for easily degradable co‐substrates such as glucose or acetate with only a slow concomitant respiration of phenol. Respiration of phenol increased rapidly after the co‐substrates were depleted. The highest phenol degradation rates were 51.6 mmol/L d, when phenol was the sole carbon substrate. Vice versa, phenol was preferentially respired in the presence of a less easily degradable co‐substrate such as 2‐chlorophenol at a rate of around 7 mmol/L d. Further studies with an enrichment culture that was obtained after 7 successive transfers of phenol‐adapted sludge into mineral medium with phenol as the only carbon source indicated that the acetate and glucose‐degrading capabilities were diminished or almost completely lost. In these enrichment cultures, phenol degradation was not affected by the presence of glucose, but glucose was not degraded. In contrary, the presence of acetate slightly slowed down the phenol degradation rate of the enrichment culture. Growth of the microorganisms apparently occurred at the expense of phenol and acetate respiration. The result of this work may be of practical importance in determining the feeding strategy, which is the key factor for most biological wastewater treatment systems. When acetate was present together with phenol in a wastewater, the phenol degradation rates were influenced by acetate, since acetate was an intermediate of phenol degradation. Glucose as an “independent substrate” was apparently degraded by other bacteria via acetate, and in this way it also influenced the phenol degradation rates. Glucose‐degrading bacteria could be “washed out” from the acclimatized sludge during several transfers into mineral medium with phenol as the sole carbon source. If later on, glucose was added again, it remained undegraded and did not influence phenol degradation. 2‐Chlorophenol degradation also requires other bacteria than phenol degraders.

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The Influence of Environmental Conditions on the Ability of a Mixed Microbial Population to Degrade 4-Chlorophenol

O'Sullivan¹,

Quilty²

2001

Environmental Monitoring and Biodiagnostics of Hazardous Contaminants

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Studies on biodegradation of a mixture of toxic and nontoxic pollutant using Arthrobacter species

Cited by 19 publications

References 5 publications

Exhausted carbon for the removal of hydrogen sulfide and ammonia

Exhausted carbon for the removal of hydrogen sulfide and ammonia

Effect of Co‐Substrates on Aerobic Phenol Degradation by Acclimatized and Non‐acclimatized Enrichment Cultures

The Influence of Environmental Conditions on the Ability of a Mixed Microbial Population to Degrade 4-Chlorophenol

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