Abstract：
:Syngas from biomass or steel mills can be fermented into a dilute stream of ethanol and acetic acid, which requires energy intensive distillation for product recovery. This can be circumvented by selective secondary fermentation of the syngas fermentation effluent to caproic acid as easier recoverable platform chemical with Clostridium kluyveri. Here, we explore the impact of biochar and activated carbon on this process. Changes during the fermentation with biochar or activated carbon were monitored, different doses were tested and the recyclability of biochar and activated carbon was assessed. Biochar decreased the lag phase and increased the caproic acid production rate (up to 0.50 g·L-1·h-1). Upon recycling for subsequent fermentation, biochar retained this property largely. Activated carbon addition, especially at high dose, could potentially increase the conversion and selectivity towards caproic acid to 14.15 g·L-1 (control: 11.01 g·L-1) and 92% (control: 84%), respectively.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Ghysels S,Buffel S,Rabaey K,Ronsse F,Ganigué Rdoi
10.1016/j.biortech.2020.124236subject
Has Abstractpub_date
2021-01-01 00:00:00pages
124236eissn
0960-8524issn
1873-2976pii
S0960-8524(20)31510-8journal_volume
319pub_type
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