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Evaluation of a wet processing strategy for mixed phumdi biomass conversion to bioethanol
- Puthiyamadam, Anoop, Adarsh, Velayudhanpillai Prasannakumari, Mallapureddy, Kiran Kumar, Mathew, Anil, Kumar, Jitendra, Yenumala, Sudhakara Reddy, Bhaskar, Thallada, Ummalyama, Sabeela Beevi, Sahoo, Dinabandhu, Sukumaran, Rajeev K
- Bioresource technology 2019 v.289 pp. 121633
- bioethanol, biomass, biorefining, cellulose, climatic factors, enzymatic hydrolysis, ethanol production, feedstocks, fermentation, glucose, hydrolysates, lakes, lignin, vegetation, India
- Biorefineries typically use dry feedstock due to technical and logistic issues, but in unique cases where climatic conditions are unfavorable and where the biomass has to be processed without a holding time, wet processing might be advantageous. The present study evaluated the possibility of using the fresh (non-dried) mixed biomass harvested from Phumdis; which are floating vegetation unique to Loktak lake in Manipur, India, for bioethanol production. Pretreatment with dilute alkali (1.5% at 120 °C for 60 min) resulted in 36% lignin removal and an enhancement of cellulose content to 48% from 37%, and enzymatic hydrolysis released 25 g/L glucose. Fermentation of the hydrolysates was highly efficient at 95%, attained in 36 h and 80% in just 12 h. The new wet processing strategy could help in value addition of mixed phumdi biomass.