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  • 1990-1994  (3)
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  • 1
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    Microbiological characterization of the biomass production chamber during hydroponic growth of crops at the controlled ecological life support system (CELSS) breadboard facility (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: SAE PAPER 911427 , International Conference on Environmental Systems; Jul 15, 1991 - Jul 18, 1991; San Francisco, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Development of an Intermediate-Scale Aerobic Bioreactor to Regenerate Nutrients from Inedible Crop Residues (1994)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Three Intermediate-Scale Aerobic Bioreactors were designed, fabricated, and operated. They utilized mixed microbial communities to bio-degrade plant residues. The continuously stirred tank reactors operated at a working volume of 8 L, and the average oxygen mass transfer coefficient, k(sub L)a, was 0.01 s(exp -1). Mixing time was 35 s. An experiment using inedible wheat residues, a replenishment rate of 0.125/day, and a solids loading rate of 20 gdw/day yielded a 48% reduction in biomass. Bioreactor effluent was successfully used to regenerate a wheat hydroponic nutrient solution. Over 80% of available potassium, calcium, and other minerals were recovered and recycled in the 76-day wheat growth experiment.
    Keywords: Life Sciences (General)
    Type: NASA-CR-202467 , NAS 1.26:202467 , SAE-TP-941501 , Environmental Systems; Jun 20, 1994 - Jun 23, 1994; Friedrichshafen; Germany|(ISSN 0148-7191)|Space Environmental Control Systems; Jun 20, 1994 - Jun 23, 1994; Friedrichshafen; Germany
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Evaluation of Enzymatic Hydrolysis of CELSS Wheat Residue Cellulose at a Scale Environment to NASA's KSC Breadboard Project (1993)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Biomass processing at the Kennedy Space Center CELSS breadboard project has focused on the evaluation of breadboard-scale enzymatic hydrolysis of wheat residue cellulose (25%, w/w). Five replicate runs of cellulase production by Trichoderma reesei (QM9414) and enzymatic hydrolysis of residue cellulose were completed. Enzymes were produced in 1 0 days (5 L, 25 g (dry weight) residue). Cellulose hydrolysis (12 L, 50 g (dry weight) residue) using these enzymes produced 5.5 to 6.0 g glucose liter(exp -1) in 7 days. Cellulose conversion efficiency was 29%. These processes are feasible technically on a breadboard scale, but would only increase the edible wheat yield 10%.
    Keywords: Life Sciences (General)
    Type: NASA-TM-112349 , NAS 1.15:112349 , SAE -TP-932253 , (ISSN 0148-7191)|Environmental Systems; Jul 12, 1993 - Jul 15, 1993; Colorado Springs, CO; United States
    Format: text
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    NASA TECHNICAL REPORTS
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