Applying microwave vacuum pyrolysis to design moisture retention and pH neutralizing palm kernel shell biochar for mushroom production

Wan Adibah Wan Mahari, Wai Lun Nam, Christian Sonne, Wanxi Peng, Xue Yee Phang, Rock Keey Liew, Peter Nai Yuh Yek, Xie Yi Lee, Ou Wei Wen, Pau Loke Show, Wei Hsin Chen, Jo Shu Chang, Su Shiung Lam

Research output: Contribution to journalArticle

Abstract

Microwave vacuum pyrolysis of palm kernel shell was examined to produce engineered biochar for application as additive in agriculture application. The pyrolysis approach, performed at 750 W of microwave power, produced higher yield of porous biochar (28 wt%) with high surface area (270 cm2/g) compared to the yield obtained by conventional approach (<23 wt%). Addition of the porous biochar in mushroom substrate showed increased moisture content (99%) compared to the substrate without biochar (96%). The mushroom substrate added with biochar (150 g) was optimal in shortening formation, growth, and full colonization of the mycelium within one month. Using 2.5% of the biochar in mushroom substrate desirably maintained the optimum pH level (6.8–7) during the mycelium colonization period, leading to high mycelium growth (up to 91%) and mushroom yield (up to 280 g). The engineered biochar shows great potential as moisture retention and neutralizing agent in mushroom cultivation.

Original languageEnglish
Article number123572
JournalBioresource technology
Volume312
DOIs
Publication statusPublished - 2020 Sep

All Science Journal Classification (ASJC) codes

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

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    Wan Mahari, W. A., Nam, W. L., Sonne, C., Peng, W., Phang, X. Y., Liew, R. K., Yek, P. N. Y., Lee, X. Y., Wen, O. W., Show, P. L., Chen, W. H., Chang, J. S., & Lam, S. S. (2020). Applying microwave vacuum pyrolysis to design moisture retention and pH neutralizing palm kernel shell biochar for mushroom production. Bioresource technology, 312, [123572]. https://doi.org/10.1016/j.biortech.2020.123572