Abstract：
:Removal of tetrachloroethylene (perchloroethylene; C2Cl4) by microbial consortia from two sites with different C2Cl4 exposure histories was examined in a bench-scale anaerobic column bioreactor. It was hypothesized that optimal removal would be observed in the reactor packed with sediments having an extensive exposure history. Microbial consortia were enriched from hyporheic-zone (HZ) sediments from the Portneuf aquifer near Pocatello, Idaho, and from industrial-zone (IZ) sediments from a highly contaminated aquifer in Portland, Oregon. Lactate and acetate were the electron donors during experiments conducted over 9 and 7 months for HZ and IZ sediments, respectively. In the HZ bioreactor, the retention time ranged from 31 h to 81 h, and inlet C2Cl4 concentrations ranged from 0.1 ppm to 1.0 ppm. Dechlorination of C2Cl4 averaged 60% and reached a maximum of 78%. An increase in C:N from 27:1 to 500:1 corresponded to an 18% increase in removal efficiency. Trichloroethylene production corresponded to decreased effluent C2Cl4; further intermediates were not detected. In the IZ bioreactor, the retention time varied from 34 h to 115 h; the inlet C2Cl4 concentration was 1.0 ppm. C2Cl4 removal averaged 70% with a maximum of 98%. Trichloroethylene and cis-dichloroethylene were detected in the effluent. Increases in C:N from 50:1 to 250:1 enhanced dechlorination activity.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
Noftsker C,Watwood MEdoi
10.1007/s002530051074subject
Has Abstractpub_date
1997-09-01 00:00:00pages
424-30issue
3eissn
0175-7598issn
1432-0614journal_volume
48pub_type
杂志文章abstract：:Polyunsaturated fatty acids (PUFAs) are essential lipids for cell function, normal growth, and development, serving as key structural components of biological membranes and modulating critical signal transduction events. Omega-3 (n-3) long chain PUFAs (LC-PUFAs) such as eicosapentaenoic acid (EPA) and docosahexaenoic ...
journal_title：Applied microbiology and biotechnology
pub_type： 杂志文章
doi：10.1007/s00253-017-8585-x
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journal_title：Applied microbiology and biotechnology
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更新日期：2009-02-01 00:00:00
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更新日期：2018-04-01 00:00:00
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更新日期：1997-12-01 00:00:00
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journal_title：Applied microbiology and biotechnology
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doi：10.1007/s00253-011-3218-2
更新日期：2011-05-01 00:00:00
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更新日期：2001-11-01 00:00:00
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更新日期：2011-03-01 00:00:00
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更新日期：2005-06-01 00:00:00
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journal_title：Applied microbiology and biotechnology
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更新日期：1997-10-01 00:00:00
abstract：:Nitrate, injected into oil fields, can oxidize sulfide formed by sulfate-reducing bacteria (SRB) through the action of nitrate-reducing sulfide-oxidizing bacteria (NR-SOB). When reservoir rock contains siderite (FeCO(3)), the sulfide formed is immobilized as iron sulfide minerals, e.g. mackinawite (FeS). The aim of ou...
journal_title：Applied microbiology and biotechnology
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更新日期：2009-05-01 00:00:00
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journal_title：Applied microbiology and biotechnology
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更新日期：2009-05-01 00:00:00
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更新日期：2013-04-01 00:00:00
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journal_title：Applied microbiology and biotechnology
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更新日期：2006-08-01 00:00:00
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journal_title：Applied microbiology and biotechnology
pub_type： 杂志文章
doi：10.1007/s002530051087
更新日期：1997-10-01 00:00:00
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更新日期：2019-07-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/BF00902732
更新日期：1994-11-01 00:00:00
abstract：:Malate synthase (Mls), a key enzyme in the glyoxylate cycle, is required for virulence in microbial pathogens. In this study, we identified the AoMls gene from the nematode-trapping fungus Arthobotrys oligospora. The gene contains 4 introns and encodes a polypeptide of 540 amino acids. To characterize the function of ...
journal_title：Applied microbiology and biotechnology
pub_type： 杂志文章
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更新日期：2014-03-01 00:00:00
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更新日期：2016-06-01 00:00:00
abstract：:Yarrowia lipolytica is a promising platform for single cell oil production. It is well-known for its metabolism oriented toward utilization of hydrophobic substrates and accumulation of storage lipids. Multiple copies of DGA2 under constitutive promoter were introduced into the Q4 strain, a quadruple mutant deleted fo...
journal_title：Applied microbiology and biotechnology
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更新日期：2015-10-01 00:00:00
