Abstract:
:An integrated solvent (ABE) fermentation and product removal process was investigated. A stable solvent productivity of 3.5 g/L h was achieved by using cells of Clostridium acetobutylicum immobilized onto a packed bed of bonechar, coupled with continuous product removal by pervaporation. Using a concentrated feed solution containing lactose at 130g/L, a lactose value of 97.9% was observed. The integrated fermentation and product removal system, with recycling of the treated fermentor effluent containing only low amount of solvents (/but lactose and acids), leads to only low acid losses. Therefore, most of the acids are converted to solvents, and this results in a high solvent yield of 0.39 g solvents/g lactose utilized. The pervaporation system provided a high product removal rate even at low solvent concentrations. A solvent membrane flux of 7.1 g/m(2) h with a selectivity of 5 was achieved during these investigations. The system proved to be very reliable.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Friedl A,Qureshi N,Maddox ISdoi
10.1002/bit.260380510subject
Has Abstractpub_date
1991-08-20 00:00:00pages
518-27issue
5eissn
0006-3592issn
1097-0290journal_volume
38pub_type
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