Log in

Bio-valorising Paddy Straw as an Inducer-Substrate for Ethanol Production using Fungal Secretome of Penicillium mallochii

  • Research paper
  • Published:
International Journal of Environmental Research Aims and scope Submit manuscript

Abstract

In order to improve the process feasibility and cost function of bioethanol production, higher titres of biomass saccharifying cellulases need to be produced on commercial scale. Diverse lignocellulosic substrates including abundantly accessible paddy straw can be utilized as carbonaceous substrates for the production of cellulose hydrolysing enzymes. This study aims to meliorate milled and sequential acid/alkali pre-treated paddy straw as inducer-substrates for the synthesis of fungal secretomes from Penicillium mallochii repertoires under solid state and liquid shake flask fermentation (SSF and LSF, respectively). The analysis of enzymatic activities of the respective secretomes reinforced the cellulolytic potential of P. mallochii where the maximum cellulase production (Filter paper cellulase: 76.43, Carboxymethyl cellulase: 130.29, Avicelase: 18.6 and β-glucosidase: 83.59 U L−1) was exhibited under LSF conditions using pre-treated paddy straw as the inducer. The disorganisation of the cellulosic structure via hydrogen bond disruption, as indicated by FTIR analysis, after acid/alkali pretreatment allowed a better establishment of fungus on the substrate, thereby facilitating higher cellulase production. A maximum ethanol content of 11.63 g L−1 was obtained at 48 h of simultaneous saccharification and fermentation using pre-hydrolysed paddy straw at 10% (w/v) solid loading and a cellulase dosage of 25 FPU gds−1. These results affirm the utilization of paddy straw for cellulase and ethanol production in an integrated bioprocess that can further be explored and optimized for scale-up studies to cater industrial applications.

Graphical Abstract

This is a preview of subscription content, log in via an institution to check access.

Access this article

Subscribe and save

Springer+ Basic
EUR 32.99 /Month
  • Get 10 units per month
  • Download Article/Chapter or Ebook
  • 1 Unit = 1 Article or 1 Chapter
  • Cancel anytime
Subscribe now

Buy Now

Price includes VAT (France)

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

Data availability

The data used to support the findings of this study are included within the article.

References

Download references

Funding

This work was supported by the Department of Science and Technology, Government of India under DST-INSPIRE (Innovation in Science Pursuit for Inspired Research) Fellowship program (Grant Number IF190819).

Author information

Authors and Affiliations

Authors

Contributions

GK: Investigation, data curation, formal analysis, resources, software, writing- original draft; MST: Conceptualization, supervision, resource acquisition, validation, writing- review and editing; AK: resource acquisition, supervision, and writing: review and editing.

Corresponding author

Correspondence to Gurkanwal Kaur.

Ethics declarations

Conflict of Interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Kaur, G., Taggar, M.S. & Kalia, A. Bio-valorising Paddy Straw as an Inducer-Substrate for Ethanol Production using Fungal Secretome of Penicillium mallochii. Int J Environ Res 18, 68 (2024). https://doi.org/10.1007/s41742-024-00621-6

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s41742-024-00621-6

Keywords

Navigation