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Biological Production Of Ethanol From Coal Task 4 Report Continuous Reactor Studies
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Book Synopsis Biological Production of Ethanol from Coal. Task 4 Report, Continuous Reactor Studies by :
Download or read book Biological Production of Ethanol from Coal. Task 4 Report, Continuous Reactor Studies written by and published by . This book was released on 1992 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of ethanol from synthesis gas by the anaerobic bacterium C. ljungdahlii has been demonstrated in continuous stirred tank reactors (CSTRs), CSTRs with cell recycle and trickle bed reactors. Various liquid media were utilized in these studies including basal medium, basal media with 1/2 B-vitamins and no yeast extract and a medium specifically designed for the growth of C. ljungdahlii in the CSTR. Ethanol production was successful in each of the three reactor types, although trickle bed operation with C. ljungdahlii was not as good as with the stirred tank reactors. Operation in the CSTR with cell recycle was particularly promising, producing 47 g/L ethanol with only minor concentrations of the by-product acetate.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-04 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biological Production of Ethanol from Coal by :
Download or read book Biological Production of Ethanol from Coal written by and published by . This book was released on 1991 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research is continuing in attempting to increase both the ethanol concentration and product ratio from the C. ljungdahlii fermentation. Both batch and continuous reactors are being used for this purpose. The purpose of this report is four-fold. First, the data presented in PETC Report No. 2-4-91 (June--September 1991) are analyzed and interpreted using normalized specific growth and production rates. This technique eliminates experimental variation due to the differences in inoculum history. Secondly, the effects of the sulfur gases H2S and COS on the performance of C. ljungdahlii are presented and discussed. Although these are preliminary results, they illustrate the tolerance of the bacterium to low levels of sulfur gases. Thirdly, the results of continuous stirred tank reactor studies are presented, where cell and product concentrations are shown as a function of agitation rate and gas flow rate. Finally, additional data are presented showing the performance of C. ljungdahlii in a CSTR with cell recycle.
Book Synopsis Biological Production of Ethanol from Coal. [Quarterly Technical Report], September 22, 1991--December 21, 1991 by :
Download or read book Biological Production of Ethanol from Coal. [Quarterly Technical Report], September 22, 1991--December 21, 1991 written by and published by . This book was released on 1991 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research is continuing in attempting to increase both the ethanol concentration and product ratio from the C. ljungdahlii fermentation. Both batch and continuous reactors are being used for this purpose. The purpose of this report is four-fold. First, the data presented in PETC Report No. 2-4-91 (June--September 1991) are analyzed and interpreted using normalized specific growth and production rates. This technique eliminates experimental variation due to the differences in inoculum history. Secondly, the effects of the sulfur gases H2S and COS on the performance of C. ljungdahlii are presented and discussed. Although these are preliminary results, they illustrate the tolerance of the bacterium to low levels of sulfur gases. Thirdly, the results of continuous stirred tank reactor studies are presented, where cell and product concentrations are shown as a function of agitation rate and gas flow rate. Finally, additional data are presented showing the performance of C. ljungdahlii in a CSTR with cell recycle.
Book Synopsis Biological Production of Ethanol from Coal. [Quarterly Report], September 22, 1991--December 21, 1991 by :
Download or read book Biological Production of Ethanol from Coal. [Quarterly Report], September 22, 1991--December 21, 1991 written by and published by . This book was released on 1992 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research is continuing in attempting to increase both the ethanol concentration and product ratio (acetate to ethanol) from the C. ljungdahlii fermentation. Both batch and continuous reactors are being used for this purpose. The purpose of this report is four-fold. First, the data presented in PETC Report No. 2-4-91 (June--September, 1991) are analyzed and interpreted using normalized specific growth and production rates. This technique eliminates experimental variation due to differences in inoculum history. Secondly, the effects of the sulfur gases H2S and COS on the performance of C. ljungdahlii are presented and discussed. Although these are preliminary results, they illustrate the tolerance of the bacterium to low levels of sulfur gases. Thirdly, the results of continuous stirred tank reactor studies are presented, where cell and product concentrations are shown as a function of agitation rate and gas flow rate. Finally, additional data are presented showing the performance of C. ljungdahlii in a CSTR with cell recycle.
Book Synopsis Biological Production of Ethanol from Coal. [Quarterly Report], March 22, 1990--June 21, 1990 by :
Download or read book Biological Production of Ethanol from Coal. [Quarterly Report], March 22, 1990--June 21, 1990 written by and published by . This book was released on 1990 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fermentation pH has been observed to be the key parameter affecting the ratio of ethanol to acetate produced by Clostridium ljungdahlii. The effects of controlled pH on cell growth and product formation by C. ljungdahlii were measured. It was found that cell concentration and acetate concentration increased with pH, while the ethanol concentration was highest at the lower pH. The molar product ratio of ethanol to acetate was 0.74 at pH 4.0, 0.39 at pH 4.5 and 0.12 at pH 5.0. Future experiments will concentrate on studying other important parameters such as agitation rate and nutrients concentrations with controlled pH as a preclude to continuous reactor studies.
Author :University of Arkansas, Fayetteville. Department of Chemical Engineering Publisher : ISBN 13 : Total Pages :106 pages Book Rating :4.:/5 (297 download)
Book Synopsis Biological Production of Ethanol from Coal by : University of Arkansas, Fayetteville. Department of Chemical Engineering
Download or read book Biological Production of Ethanol from Coal written by University of Arkansas, Fayetteville. Department of Chemical Engineering and published by . This book was released on 1991 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biological Production of Ethanol from Coal. [Quarterly Report], June 22, 1991--September 21, 1991 by :
Download or read book Biological Production of Ethanol from Coal. [Quarterly Report], June 22, 1991--September 21, 1991 written by and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of temperature on the growth and uptake of CO by C. ljundahlii were studied in batch culture. Continuous stirred tank reactor (CSTR) studies were carried out measuring the effects of agitation rate on culture performance. Finally, cell recycle studies continued in conjunction with a CSTR.
Book Synopsis Biological Production of Ethanol from Coal. [Fourth Quarterly Report], October 22, 1989--December 1989 by :
Download or read book Biological Production of Ethanol from Coal. [Fourth Quarterly Report], October 22, 1989--December 1989 written by and published by . This book was released on 1989 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two batch and one continuous reactor study involving Clostridium ljungdahlii were carried out. First, the effects of H2 partial pressure on growth, CO and H2 uptake and product formation by C. ljungdahlii were investigated in batch culture. Over the concentration range studied, it was observed that CO was preferentially utilized in favor of H2. It was also seen that increasing H2 partial pressures increased the ratio of ethanol to acetate. Finally, a two-stage CSTR system was successfully operated with C. ljungdahlii in which growth occurred in the first stage and ethanol production occurred in the second stage.
Book Synopsis Biological Production of Ethanol from Coal. [Quarterly Technical Report], December 22, 1991--March 21, 1992 by :
Download or read book Biological Production of Ethanol from Coal. [Quarterly Technical Report], December 22, 1991--March 21, 1992 written by and published by . This book was released on 1992 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research is continuing in an attempt to increase both the ethanol concentration and product ratio using C. ljungdahlii. The purpose of this report is to present data utilizing a medium prepared especially for C. ljungdahlii. Medium development studies are presented, as well as reactor studies with the new medium in batch reactors. CSTRs and CSTRs with cell recycle. The use of this new medium has resulted in significant improvements in cell concentration, ethanol concentration and product ratio.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biological Production of Ethanol Fom Coal by :
Download or read book Biological Production of Ethanol Fom Coal written by and published by . This book was released on 1992 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research is continuing in an attempt to increase both the ethanol concentration and product ratio using C. ljungdahlii. The purpose of this report is to present data (acetate to ethanol) utilizing a medium prepared especially for C. ljungdahlii. Medium development studies are presented, as well as reactor studies with the new medium in batch reactors. Continuous stirred tank reactor (CSTR) with cell recycle. The use of this new medium has resulted in significant improvements in cell concentration, ethanol concentration and product ratio.
Book Synopsis Biological Production of Ethanol Fom Coal. [Quarterly Report], December 22, 1991--March 21, 1992 by :
Download or read book Biological Production of Ethanol Fom Coal. [Quarterly Report], December 22, 1991--March 21, 1992 written by and published by . This book was released on 1992 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research is continuing in an attempt to increase both the ethanol concentration and product ratio using C. ljungdahlii. The purpose of this report is to present data (acetate to ethanol) utilizing a medium prepared especially for C. ljungdahlii. Medium development studies are presented, as well as reactor studies with the new medium in batch reactors. Continuous stirred tank reactor (CSTR) with cell recycle. The use of this new medium has resulted in significant improvements in cell concentration, ethanol concentration and product ratio.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1993 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bench-scale Demonstration of Biological Production of Ethanol from Coal Synthesis Gas. Quarterly Report by :
Download or read book Bench-scale Demonstration of Biological Production of Ethanol from Coal Synthesis Gas. Quarterly Report written by and published by . This book was released on 1993 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to present results from culture isolation and selection studies, bench-scale fermentation experiments, and ethanol recovery experiments. Several promising isolates have been obtained in addition to Clostridium ljungdahlii, strain PETC, and are being used in batch and continuous culture comparison studies. C. ljungdahlii is being utilized in two-stage bench-scale reactor studies, aimed at producing ethanol in high concentrations from a stable culture system. Finally, solvent comparison studies have been performed for the economical recovery of ethanol from the fermentation broth.
Book Synopsis Biological Production of Ethanol from Coal. [Quarterly Technical Report], June 22, 1991--September 21, 1991 by :
Download or read book Biological Production of Ethanol from Coal. [Quarterly Technical Report], June 22, 1991--September 21, 1991 written by and published by . This book was released on 1991 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of temperature on the growth and uptake of CO by C. ljundahlii were studied in batch culture. A maximum specific growth rate of 0.095h−1 was found at 37°C, a normal optimum temperature for the growth of anaerobic bacteria. A maximum specific uptake rate of 0.0095 mmol/mg·h was found at a slightly higher temperature of 40°C. CSTR studies were carried out measuring the effects of agitation rate on culture performance. As expected, growth was best at the higher agitation rates until nutrient limitation occurred.
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