Nanoparticle induced biological disintegration: A new phase separated pretreatment strategy on microalgal biomass for profitable biomethane recovery

S. Kavitha, M. Schikaran, R. Yukesh Kannah, M. Gunasekaran, Gopalakrishnan Kumar, J. Rajesh Banu

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

This study involves the application of new phase separated biological pretreatment (PSBP) strategy on microalgal biomass using the nickel nanoparticle induced cellulase secreting bacterial disintegration. Particularly, interest was focussed on cell wall weakening (CWW) of microalgae biomass besides the cell disintegration (CD) and release of organics. During CWW, protein, carbohydrate, cellulose, hemicellulose and DNA were used as evaluation indexes. Similarly, during CD, soluble chemical oxygen demand was used as evaluation index to assess the disintegration effect. A higher CWW was achieved at nickel nanoparticle (Np) dosage of 0.004 g/g SS. During CD, a clear demarcation in biomass solubilisation was achieved by PSBP (36%) than the sole biological pretreatment –BP (24%). The biomethanogenesis test results showed that enhanced methane production of 411 mL/g COD was achieved by PSBP than BP. Energy analysis showed that a higher net energy production of 6.467 GJ/d was achieved by PSBP.

Original languageEnglish
Article number121624
JournalBioresource technology
Volume289
DOIs
Publication statusPublished - 2019 Oct

Bibliographical note

Funding Information:
Authors thank Department of Biotechnology, India for financial support for this work ( BT/PR13124/GBD/27/192/2009 ) under the scheme Rapid Grant for Young Investigator (RGYI).

Publisher Copyright:
© 2019 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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