Effect of surfactant addition on disperser disintegration of water hyacinth: a new insight to overcome the inhibitory effects of lignin on methanogenesis and improve the energy and economic aspects

Rajesh J. Banu, S. Kavitha, Yukesh R. Kannah, J. Jayakodi, Gopalakrishnan Kumar, Vinay Kumar Tyagi, Shashi Kant Bhatia

Research output: Contribution to journalArticlepeer-review

Abstract

The technology for disperser-mediated disintegration (DMD) of water hyacinth biomass (WHB) (Eichhornia crassipes) has been limited by its high energy requirements, aggregation of the biomass, and the binding of lignin to methanogenic enzymes during the biomethanation process. Thus, these limitations could affect the overall efficiency of the process. Moreover, it is questionable whether cost-effective biomethanation via the DMD process can be achieved. The main aim of this work is to determine whether a combinatorial pretreatment can enhance the biomass solubilization with lower energy input, and reduce the issue of biomass aggregation and lignin inhibition leading to a greater economic output. The combinatorial chemo-mechanical pretreatment combines two different pretreatments by integrating a surfactant, sodium dodecyl sulfate (SDS), with a mechanical pretreatment induced by a disperser. The outcome of the study revealed that this combinatorial pretreatment reduced the specific energy input of the DMD process (1230 kJ kg−1 Total Solids (TS)) to 184.5 kJ kg−1 TS in the SDMD (surfactant-disperser-mediated disintegration) process. A higher solubilization of 23% was achieved in SDMD when compared to DMD (9.5%). A greater methane production of 0.35 L g−1 chemical oxygen demand (COD) was documented in SDMD due to surfactant addition, which prevents the adsorption of enzymes secreted by methanogens onto the lignin. The energy and economic analysis revealed that a higher net profit of 2.3 USD per ton was achieved in SDMD when compared to DMD.

Original languageEnglish
Pages (from-to)502-514
Number of pages13
JournalSustainable Energy and Fuels
Volume7
Issue number2
DOIs
Publication statusPublished - 2022 Nov 14

Bibliographical note

Funding Information:
The work is supported by the funding from UGC-STRIDE-Component-1/2021 (project on climate change under the title “Application of bio char on agro ecosystem for mitigating climate change and GHG emission”) at Central University of Tamil Nadu, Tiruvarur, Tamil Nadu, India.

Publisher Copyright:
© 2023 The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

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