Effect of viscosity on the mixing efficiency in a self-agitation anaerobic baffled reactor

Wei Kang Qi, Yi Ling Guo, Mei Xue, Jing Ru Du, Weicheng Li, Yu You Li

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Abstract One special self-agitation reactor, which does not require a mechanical mixer or other equipment for mixing, has been introduced. Self-agitation is affected by variation in viscosity property. To obtain and research the effect of viscosity on mixing behavior in the self-agitation reactor, Fluent® was used to create numerical simulations and to visualize the fluid flow status. The results show that when the viscosity of the liquid is 1 mPa s, the entire self-agitation results in an almost completely mixed reactor. The substrate becomes difficult to agitate, and the diffusion of the substrate and the tracer become quite after every self-agitation, as the viscosity increases. Once the viscosity is higher than 25 mPa s, the substrate and tracer could not be mixed in the entire reactor, and the reactor is recognized as the combination of several completely mixed reactors between which little exchange of liquid occurs.

Original languageEnglish
Article number1334
Pages (from-to)905-910
Number of pages6
JournalBioprocess and Biosystems Engineering
Issue number5
Publication statusPublished - 2015 Mar 22


  • Anaerobic digestion
  • CFD
  • Flow state
  • Self-agitation
  • Viscosity

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering


Dive into the research topics of 'Effect of viscosity on the mixing efficiency in a self-agitation anaerobic baffled reactor'. Together they form a unique fingerprint.

Cite this