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Development of a hollow fiber membrane bioreactor for cometabolic degradation of chlorinated solventsPressman, Jonathan G., January 2001 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2001. / Vita. Includes bibliographical references. Available also from UMI Company.
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Development of a hollow fiber membrane bioreactor for cometabolic degradation of chlorinated solvents /Pressman, Jonathan G., January 2001 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2001. / Vita. Includes bibliographical references (leaves 255-268). Available also in a digital version from Dissertation Abstracts.
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Control and characterization of biomass activity and distribution in vapor-phase bioreactors for VOC removal /Song, Ji-hyeon, January 2001 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2001. / Vita. Includes bibliographical references (leaves 212-220). Available also in a digital version from Dissertation Abstracts.
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NOx removal & transformations in fungal bioreactorsChung, Sung Yeup, 1971- 02 August 2011 (has links)
Not available / text
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Enzyme inactivation at the aqueous/organic interfaceRoss, Alistair Chassels January 1999 (has links)
No description available.
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Properties of absorbent polymer polymer extractants for the selective removal of target molecules from fermentation systemsDafoe, JULIAN 21 January 2014 (has links)
This thesis investigated polymer properties for their application as extractants in two-phase partitioning bioreactors (TPPBs), which are intended to remove inhibitory fermentation products as they are produced. Three applications of polymer TPPB extractants were studied, followed by an investigation into poly(ether)-based polymers’ affinity toward representative target molecules, to identify properties which confer improved extraction performance.
The first investigation aimed to replace a liquid extractant (silicone oil) using a block copolymer, Hytrel® 8206, in the biotransformation of indene to cis-(1S,2R)-indandiol, a chiral pharmaceutical intermediate, by Pseudomonas putida ATCC55687. The polymer simultaneously delivered substrate and removed the product and by-products to alleviate inhibition, improving operability and productivity relative to silicone oil, which could only deliver substrate. Subsequently, soft segment composition and proportion were varied in different block copolymers to selectively extract product or by-product(s) from the same biotransformation, altering the cells’ production profile. This demonstrated selective polymer extraction to help direct substrate utilization toward the product rather than by-product(s) in complex biotransformations.
The next study was on absorptive extraction of a hydrophilic target molecule, 4-valerolactone, produced by recombinant Pseudomonas putida KT2440, featuring an equilibrium-limited final step. The aim was to demonstrate the first application of equilibrium-pulling using selective product absorption, improving production by 30%. Furthermore, this study showed that limited polymer water absorption is helpful to aid in extraction of hydrophilic target molecules, but high polymer water content compromises selectivity, diminishing the equilibrium-pulling effect.
Finally, the effects of soft block proportion, molecular weight, and chain-end composition on affinity toward representative target molecules, carveol and carvone, were studied using commercial block copolymers and their representative homopolymer components. Target molecule affinity improved at low molecular weights in the absence of polar homopolymer end-groups. End-group polarity had an effect whose direction depended on the polarity of the target molecule, improving affinity toward a third, polar target molecule, 4-valerolactone, thereby providing a means to tailor selectivity. Crystallinity and hard segment proportion were both found to reduce uptake.
This work has provided insights into the selection of polymeric TPPB absorbents by identifying polymer properties which improve affinity and selectivity toward different fermentation target molecules, especially relatively hydrophilic ones. The future design of purpose-built polymer extractants will benefit from considering these findings. / Thesis (Ph.D, Chemical Engineering) -- Queen's University, 2014-01-17 13:43:54.818
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Evaluation of parameters influencing oxygen transfer efficiency in a membrane bioreactorHu, Jing January 2006 (has links)
Thesis (M.S.)--University of Hawaii at Manoa, 2006. / Includes bibliographical references (leaves 96-99). / xiii, 99 leaves, bound ill. (some col.) 29 cm
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Parametric study of light intensity on the growth rate of "Chroogloeocystis siderophila" in a photo-bioreactorGidugu, Venkata R. January 2007 (has links)
Thesis (M.S.)--Ohio University, November, 2007. / Title from PDF t.p. Includes bibliographical references.
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Design considerations and analysis of a bioreactor for application in a bio-artificial liver support systemRonne, Luke John Thomas. January 2006 (has links)
Thesis (M.Eng. (Mechanical and Aeronautical Engineering)) -- University of Pretoria, 2006. / Includes bibliographical references.
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Microbial communities utilizing biodiesel waste and ethanol in treatment of acid mine drainageZamzow, Kendra Lynell. January 2007 (has links)
Thesis (Ph. D.)--University of Nevada, Reno, 2007. / "December, 2007." Includes bibliographical references (leaves 152-157). Online version available on the World Wide Web.
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