Phase separation and microbial distribution in the hyperthermophilic-mesophilic-type temperature-phased anaerobic digestion (TPAD) of waste activated sludge (WAS)

Yu Qin, Atsushi Higashimori, Li Jie Wu, Toshimasa Hojo, Kengo Kubota, Yu You Li

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

In order to investigate the phase separation and microbial distribution in the TPAD, the conventional thermophilic-mesophilic type (TM-TPAD) and the hyperthermophilic-mesophilic type (HM-TPAD) were operated with a single-stage mesophilic anaerobic digestion (MAD) as control. HM-TPAD accomplished the volatile solids destruction 14.5% higher than MAD. Calculating conversion efficiencies distinguished the separation of acidogenic and methanogenic phases in HM-TPAD, which was not found in TM-TPAD. The differences on microbial distributions also reflected the phase separation in HM-TPAD. The protein degraders, Coprothermobacter had higher abundance in the first stage than the second stage of HM-TPAD but it had similar abundance between the two stages of TM-TPAD. Also, the archaeal communities from the two stages of HM-TPAD shared the least similarity but those from the two stages of TM-TPAD were closely similar.

Original languageEnglish
Pages (from-to)401-410
Number of pages10
JournalBioresource Technology
Volume245
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Anaerobic digestion
  • Hyperthermophilic
  • Microbial community
  • Temperature phased
  • Waste activated sludge

ASJC Scopus subject areas

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

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