Optimisation of Pretreatment Catalyst, Enzyme Cocktail and Solid Loading for Improved Ethanol Production from Sweet Sorghum Bagasse

Bedzo, Oscar K. K.; Dreyer, Casper B.; Rensburg, Eugéne van; Görgens, Johann F.

doi:10.1007/s12155-021-10298-w

Cited by 8 publications

(2 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sweet sorghum is a fast-growing energy crop and can produce up to 30 tons of biomass per hectare per year [4]. Its ability to acclimatize to various soils and environmental conditions has also contributed to its widespread application [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…SSB = Sweet Sorghum Bagasse, BMR = Sorghum Brown Midrib, SB = Sorghum Bagasse (Unspeci ed), PSS = Photoperiod-Sensitive Sorghum,1 Log CSF value not speci ed and could also not be calculated due to insu cient pH information.2 pH range: 2.32 to 2.38, pH range: 2.38 to 2.87,4 pH range: 2.38 to 2.87,5 Represent a cluster of data comprising various cultivars and mixtures.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Maximizing total sugar recovery from pretreatment-hydrolysis of sweet sorghum bagasse through cultivar selection and process optimization

Bedzo

Diedericks

McIntosh

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

The nature of a sweet sorghum cultivar influences the recovery of sugars from the bagasse during pretreatment. The sugars recovered are used in applications for conversion to high-value products such as alcohols, organic acids, and other fuels and chemicals. The severity of the pretreatment used plays a crucial role in the yield and quality of the sugars that can be recovered. Therefore, a strategic approach was taken to lower the severity of the pretreatment process to a combined severity factor (CSF) value of 0.48, whilst maintaining a high level of total-sugar recovery (i.e. 68% (w/w) and higher). This was achieved by screening 23 sweet sorghum cultivars for high-performance characteristics at low-severity conditions and optimizing the pretreatment process conditions. The pretreatment conditions included time, temperature, and acid concentration ranges of 5 to 60 min, 150 to 210 oC, and 0.00% to 0.96% (w/w) H2SO4, respectively. Cultivar AP6 was identified as the best performer, producing the highest total sugar yield of 78.17%. A reduction in total by-product formation from 4.79 to 2.79 g/100 g biomass was also observed. Three preferred cultivars selected for pilot scale pretreatment using steam explosion resulted in maximum total sugar recoveries that exceeded 80% (w/w). Cultivar engineering/selection provides an opportunity to utilize lignocelluloses that will liberate sugars at desired yields while reducing the generation of by-products by implementing low severity pretreatments.

show abstract

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%