Methanosarcina thermophila bioaugmentation and its synergy with biochar growth support particles versus polypropylene microplastics in thermophilic food waste anaerobic digestion

Jonathan T.E. Lee, Ee Yang Lim, Le Zhang, To Hung Tsui, Hailin Tian, Miao Yan, Shuhan Lim, Maszenan bin Abdul Majid, Mui Choo Jong, Jingxin Zhang, Chi Hwa Wang, Yong Sik Ok, Yen Wah Tong

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Both biochar supplementation as well as bioaugmentation have been shown in literature to improve the methane yield of anaerobic digestion. In this study, the combination of both are evaluated by growing Methanosarcina thermophila on biochar support particles prior to augmentation of thermophilic food waste anaerobic digestion. Biochar stand alone, bioaugmentation solely, a combination of both added separately or grown together, and utilizing polypropylene (PP) microplastics as growth support instead were all tested when starting up a thermophilic process from mesophilic inoculum. Methanosarcina thermophila and biochar supplementation displayed synergy, with 5% M. thermophila on 1 g/L biochar presenting a 32% increase in specific methane yield over the control. Double the bioaugmentation dosage/concentration was also trialled with a thermophilic inoculum, and 10% M. thermophila grown on 2 g/L biochar displayed the best results with a 20% increase specific methane yield from its control standard.

Original languageEnglish
Article number127531
JournalBioresource technology
Volume360
DOIs
Publication statusPublished - 2022 Sep

Keywords

  • Anaerobic Digestion
  • Bioaugmentation
  • Biochar
  • Growth Support Particles
  • Microplastics

ASJC Scopus subject areas

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

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