Abstract:
:Microbial degradation of trichloroethylene (TCE) has been demonstrated under aerobic conditions with propane. The primary objective of this research was to evaluate the feasibility of introducing a vapor phase form of TCE in the presence of propane to batch bioreactors containing a liquid phase suspension of Mycobacterium vaccae JOB5 to accomplish degradation. The reactor system consisted of three phases: a vapor phase introducing air, propane, and TCE; a liquid phase of the microbial suspension; and a solid phase in the form of the microorganisms. Long-term and initial rate experiments were conducted on three culture sets to evaluate microbial response. In two long-term test fed propane and approximately 0.1 mg/L and 1 mg/L of TCE, respectively, propane utilization was more efficient at the high TCE concentration (600 mmol propane/mmol TCE versus 11,900 mmol propane/mmol TCE), because the propane degradation rate was approximately the same for both tests (6.73 mg/L . h and 7.85 mg/L . h for the high and low tests). In addition, TCE utilization decreased after complete propane consumption. Initial rate tests on culture sets fed propane only revealed that cells with a history of exposure to a high concentration of TCE had the highest specific growth rate, but the lowest half-saturation constant (7.60e(-3) h(-1) and 0.10 mg/L, respectively). Tests fed variable TCE concentrations (0.031 to 5.378 mg/L in the liquid phase) with no propane showed TCE depletion but no biomass growth. The tests revealed that the TCE removal increased as the TCE concentration increased, indicating a greater removal efficiency at the higher concentrations. Tests with a constant initial propane concentration and variable liquid phase TCE concentration revealed that specific propane utilization was essentially the same. (c) 1995 John Wiley & Sons, Inc.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Wilcox DW,Autenrieth RL,Bonner JSdoi
10.1002/bit.260460406subject
Has Abstractpub_date
1995-05-20 00:00:00pages
333-42issue
4eissn
0006-3592issn
1097-0290journal_volume
46pub_type
杂志文章abstract::The adsorption of Thiobacillus ferrooxidans to coal surfaces has been studied. Adsorption experiments were conducted on coal samples from eight different Eastern coal fields. In all cases the adsorption process was at least 90% complete within the first two minutes following inoculation. The results of these experimen...
journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260280402
更新日期:1986-04-01 00:00:00
abstract::Optimizations of cell productivity and utility of gaseous substrates were investigated for Alcaligenes hydrogenophilus. Theoretical analyses for the cell productivity and substrate utility were discussed in the light of experimental data. It was proved from the theoretical analyses that the maximum cell productivity w...
journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260240514
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260351002
更新日期:1990-04-25 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260240413
更新日期:1982-04-01 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260310106
更新日期:1988-01-01 00:00:00
abstract::While many pretreatments attempt to improve the enzymatic digestibility of biomass by removing lignin, this study shows that improving the surface area accessible to cellulase is a more important factor for achieving a high sugar yield. Here we compared the pretreatment of switchgrass by two methods, cellulose solvent...
journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
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doi:10.1002/bit.22059
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260460512
更新日期:1995-06-05 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
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journal_title:Biotechnology and bioengineering
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更新日期:1999-10-05 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 信件
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更新日期:2011-10-01 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
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更新日期:2016-02-01 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.25976
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.24992
更新日期:2014-01-01 00:00:00
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更新日期:2002-04-20 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260261213
更新日期:1984-12-01 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.10618
更新日期:2003-06-20 00:00:00
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pub_type: 杂志文章
doi:10.1002/bit.27292
更新日期:2020-05-01 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260350903
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journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260190902
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260170802
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journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/(SICI)1097-0290(19970305)53:5<453::AID-BIT
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
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journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260280719
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