ArticleBiotechnology for biofuels and bioproducts2025
Biorefinery for a circular carbon paradigm: process benefits to the use of dryland CAM crops for anaerobic volatile fatty acid production.
Article in Biotechnology for biofuels and bioproducts, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundAnaerobic digestion (AD) or acidogenic fermentation (AF) of biomass can generate either biogas fuel or C
resultsHere, we investigate the fermentation kinetics of this novel feedstock class (CAM plants) against traditional bioenergy crops with two contrasting inocula: AD sludge and rumen fluid. Fermentations were performed under the influence of a methanogenesis inhibitor (bromoethane sulfonate) to isolate the acidogenic fermentation processes. CAM and non-CAM substrates in this study demonstrated distinct degradation kinetics (yields and degradation rates). We demonstrate that regardless of the inoculum type, CAM crops show higher hydrolysis rates for VFA production. Moreover, yields of VFAs from three CAM crops (0.41 ± 0.01 - 0.48 ± 0.02 g/g
conclusionsAt industrial scale, the observed kinetic advantages of VFA production from CAM-plant feedstocks could translate into process enhancements that would greatly improve the cost-competitiveness of anaerobic biorefinery. Assuming comparable biomass productivities of CAM and non-CAM crops, this high yield could allow higher VFA production per unit of cultivated land, improving the environmental credentials of CAM biorefinery.
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