The effect of oxygen on growth kinetics of sulfur oxidizing bacteria (SOB) and its numerical model development

2014 ◽  
Vol 13 (3) ◽  
pp. 207-214
Author(s):  
Hyeong-Kyu Namgung ◽  
◽  
JiHyeon Song
Keyword(s):  
Numerical Model ◽  
Growth Kinetics ◽  
Model Development ◽  
Sulfur Oxidizing ◽  
Effect Of Oxygen ◽  
Kinetics Of ◽  
Sulfur Oxidizing Bacteria

Growth kinetics of haloalkaliphilic, sulfur-oxidizing bacterium Thioalkalivibrio versutus strain ALJ 15 in continuous culture

Extremophiles ◽  
2004 ◽  
Vol 8 (3) ◽  
pp. 185-192 ◽  
Author(s):  
Horia Banciu ◽  
Dimitry Y. Sorokin ◽  
Robbert Kleerebezem ◽  
Gerard Muyzer ◽  
Erwin A. Galinski ◽  
...  
Keyword(s):  
Continuous Culture ◽  
Growth Kinetics ◽  
Sulfur Oxidizing ◽  
Kinetics Of

Bacterial Kinetics of Sulfur Oxidizing Bacteria and Their Biodeterioration Rates of Concrete Sewer Pipe Samples

2010 ◽  
Vol 136 (7) ◽  
pp. 731-738 ◽  
Author(s):  
Angela Bielefeldt ◽  
Ma. Guadalupe D. Gutierrez-Padilla ◽  
Serguei Ovtchinnikov ◽  
Joann Silverstein ◽  
Mark Hernandez
Keyword(s):  
Sewer Pipe ◽  
Sulfur Oxidizing ◽  
Kinetics Of ◽  
Sulfur Oxidizing Bacteria

scholarly journals Accelerated Biodegradation of Cement by Sulfur-Oxidizing Bacteria as a Bioassay for Evaluating Immobilization of Low-Level Radioactive Waste

2004 ◽  
Vol 70 (10) ◽  
pp. 6031-6036 ◽  
Author(s):  
Orli Aviam ◽  
Gabi Bar-Nes ◽  
Yehuda Zeiri ◽  
Alex Sivan
Keyword(s):  
Weight Loss ◽  
Sulfuric Acid ◽  
Radioactive Waste ◽  
Cement Matrix ◽  
Leaching Kinetics ◽  
Low Level ◽  
Sulfur Oxidizing ◽  
Kinetics Of ◽  
Low Level Radioactive Waste ◽  
Sulfur Oxidizing Bacteria

ABSTRACT Disposal of low-level radioactive waste by immobilization in cement is being evaluated worldwide. The stability of cement in the environment may be impaired by sulfur-oxidizing bacteria that corrode the cement by producing sulfuric acid. Since this process is so slow that it is not possible to perform studies of the degradation kinetics and to test cement mixtures with increased durability, procedures that accelerate the biodegradation are required. Semicontinuous cultures of Halothiobacillus neapolitanus and Thiomonas intermedia containing thiosulfate as the sole energy source were employed to accelerate the biodegradation of cement samples. This resulted in a weight loss of up to 16% after 39 days, compared with a weight loss of 0.8% in noninoculated controls. Scanning electron microscopy of the degraded cement samples revealed deep cracks, which could be associated with the formation of low-density corrosion products in the interior of the cement. Accelerated biodegradation was also evident from the leaching rates of Ca2+ and Si2+, the major constituents of the cement matrix, and Ca exhibited the highest rate (up to 20 times greater than the control rate) due to the reaction between free lime and the biogenic sulfuric acid. Leaching of Sr2+ and Cs+, which were added to the cement to simulate immobilization of the corresponding radioisotopes, was also monitored. In contrast to the linear leaching kinetics of calcium, silicon, and strontium, the leaching pattern of cesium produced a saturation curve similar to the control curve. Presumably, the leaching of cesium is governed by the diffusion process, whereas the leaching kinetics of the other three ions seems to governed by dissolution of the cement.

Impacts of growth kinetics of sulfur-oxidizing Acidithiobacillus ferrooxidans on kinetic models

2008 ◽  
Vol 136 ◽  
pp. S318
Author(s):  
Martin Mandl ◽  
Blanka Omesova Pokorna ◽  
Oldrich Janiczek
Keyword(s):  
Growth Kinetics ◽  
Kinetic Models ◽  
Acidithiobacillus Ferrooxidans ◽  
Sulfur Oxidizing ◽  
Kinetics Of

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

Sign in / Sign up

Export Citation Format

Share Document