Detailed composition evolution of food waste in an intermittent self-agitation anaerobic digestion baffled reactor

Wei Kang Qi, Li Fang Liu, Qi Shi, Cong Wang, Yu You Li, Yongzhen Peng

Research output: Contribution to journalArticlepeer-review

Abstract

This study used an intermittent self-agitation anaerobic baffled reactor (SA-ABR) to treat food waste. The organic matter and detailed composition evolution were analyzed under continuous operation. The gas production rate was 2.43 ± 0.18 L-Gas/d/L-Re, and the biogas conversion was 0.94 L-Gas/g-TS. The effluent concentration of total chemical oxygen demand (COD) was 22.5 ± 2.44 g/L, and the removal rate of soluble COD was always over 97%. In this study, the removal rates of carbohydrate, protein, and lipids in the SA-ABR treatment were 95%, 60%, and 85%, respectively, and the concentrations were 0.11 g/L, 0.32 g/L, and 0.33 g/L, respectively. The conversion of soluble organic matter was much higher than that of insoluble substrates. The concentration of soluble pollutants was significantly lower than that of pollutants in suspended matter. The treatment of organic matter in the first half of the SA-ABR was 85–100% that of the entire reactor.

Original languageEnglish
Article number124342
JournalBioresource Technology
Volume320
DOIs
Publication statusPublished - 2021 Jan

Keywords

  • Anaerobic digestion
  • Composition evolution
  • Mixing
  • Organic waste
  • Self-agitation

ASJC Scopus subject areas

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

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