Life cycle assessment of bioethanol production from Pennisetum sp. using fed‐batch simultaneous saccharification and cofermentation at high solid loadings

2021 ◽  
Author(s):  
Sonali Mohapatra ◽  
Bikash Chandra Behera ◽  
Achyuta Nanda Acharya ◽  
Hrudayanath Thatoi
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Bioethanol Production ◽  
Fed Batch ◽  
High Solid ◽  
Simultaneous Saccharification And Cofermentation ◽  
Simultaneous Saccharification

scholarly journals Bioethanol Production From Pennisetum sp. Using Fed-Batch Simultaneous Saccharification and Co-Fermentation at High Solid Loadings and Its Life Cycle Analysis

2020 ◽  
Author(s):  
Sonai Mohapatra ◽  
Bikash Chandra Behera ◽  
Achuyta Nanda Acharya ◽  
Hrudayanath thatoi
Keyword(s):  
Life Cycle ◽  
Ethanol Production ◽  
Life Cycle Analysis ◽  
Batch Fermentation ◽  
Shake Flask ◽  
Feeding Strategy ◽  
Bioethanol Production ◽  
Fed Batch ◽  
Fed Batch Fermentation ◽  
Simultaneous Saccharification

Abstract Considerable progress has been achieved for production of bioethanol from lignocellulosic biomass. However, increasing the substrate concentration has shown to decrease the ethanol productivity. In the present study, Saccharomyces cerevisiae and Pichia membreneferans were used for ethanol production from glucose and xylose sugars respectively in optimized conditions. Further, co-culture fermentations were conducted in three different strategies for 13 g of sugar (10 g of glucose and 3 g of xylose) and the best strategy was further used for ethanol production from ultrasonication assisted NaOH (UA-NaOH) pretreated and enzymatically saccharified in batch and fed-batch fermentation conditions. Further, fed-batch fermentation was used for separate hydrolysis and co-fermentation (SHCF) and simultaneous saccharification and co-fermentation (SSCF) in shake flask conditions. The highest ethanol production of 12.2 and 7.9 (g/L) was observed for fed-batch SSCF denannath grass (DG) and Hybrid napier grass (HNG) (Palkonal MBW as the enzyme) biomass (80 g) respectively in shake flask conditions. However, increasing the biomass concentration to 270 g produced an ethanol concentration of 77.6 and 51.3 (g/L) for DG and HNG respectively in fed-batch SSCF conditions in bioreactor. Nuclear magnetic resonance studies of the residual biomass of both DG and HNG revealed presence of lower carbohydrate content, demonstrating the efficiency of the fermentation strategy. Further Life cycle Analysis (LCA) was also conducted to analyzed the effect of the ethanol on different environmental conditionsThe substrate feeding strategy and the saccharifying enzymes play a major role for efficient bioethanol production with higher substrate loadings. Presence of lower carbohydrates and some lignin moieties demonstrating the efficiency of the SSCF strategy for maximum conversion of carbohydrates. Thus fed batch SSCF process can be considered as a promising technique for biorefinery based bioethanol production from Pennisetum sp. in the future.

scholarly journals Life cycle assessment of advanced bioethanol production from pulp and paper sludge

2016 ◽  
Vol 208 ◽  
pp. 100-109 ◽  
Author(s):  
Diogo Sebastião ◽  
Margarida S. Gonçalves ◽  
Susana Marques ◽  
César Fonseca ◽  
Francisco Gírio ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Pulp And Paper ◽  
Paper Sludge ◽  
Bioethanol Production
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