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Conversion of organic acids to h 2 by Rhodospirillaceae grown with glutamate or dinitrogen as nitrogen source
Author(s) -
Segers Ludovik,
Verstraete Willy
Publication year - 1983
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260251203
Subject(s) - rhodospirillaceae , axenic , rhodospirillum rubrum , rhodospirillales , nitrogenase , chemistry , nitrogen , hydrogen , hydrogen production , butyrate , rhodopseudomonas palustris , botany , food science , nuclear chemistry , biochemistry , organic chemistry , biology , enzyme , bacteria , nitrogen fixation , fermentation , genetics
Axenic cultures of Rhodopseudomonas capsulata. Rhodospirillum rubrum , and Rhodomicrobium vannielii grown with glutamate as the nitrogen source converted lactate, acetate, and butyrate to H 2 and CO 2 . Conversion rates ranged from 100 to 926 mL H 2 L r −1day −1 (where L r is the reactor contents), and efficiencies varied from 23 to 100% When grown with N 2 , conversion rates up to 760 mL H 2 L r −1day −1 and efficiencies up to 100%were achieved. Upon aging, cultures appear to rapidly increase in hydrogen uptake activity and furthermore decrease in nitrogenase activity, both factors leading to a slowdown of hydrogen production. This was particularly the case for diazotrophically grown photobacteria.