Skip to main navigation Skip to search Skip to main content

Control of fermentation types in continuous-flow acidogenic reactors: Effects of pH and ORP

  • Nan Qi Ren*
  • , Dan Zhao
  • , Xiao Lei Chen
  • , Xiang Zhong Li
  • *Corresponding author for this work
  • Harbin Institute of Technology
  • Hong Kong Polytechnic University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

An experiment was carried out in continuous-flow acidogenic reactors and molasses was used as substrate to study the effects of pH and redox potential on fermentation types and the control. In the different experimental stages of start-up, pH-regulating and redox potential-regulating, the conditions and transformed process for each fermentation type were investigated. The experiments confirmed that butyric acid-type fermentation would occur at pH>6, the propionic acid-type fermentation at pH about 5.5 with Eh> -278 mV, and the ethanol-type fermentation at pH<4.5. A higher redox potential will lead to propionic acid-type fermentation because propionogens are facultative anaerobic bacteria. It was also demonstrated that the representative strains of ethanol-type, butyric acid-type and propionic acid-type climax community are Bacteroides, Clostridium and Propionibacterium respectively for the acidogenic fermentation of wastewater.

Original languageEnglish
Title of host publicationProceedings of the 2003 Energy and Environment
EditorsG.-M. Zeng, G.-H. Huang, Z.-H. Yang, Y.-J. Jiang
Pages537-544
Number of pages8
StatePublished - 2003
EventProceeding of the 2003 Energy and Environment - Changsha, China
Duration: 11 Oct 200314 Oct 2003

Publication series

NameProceeding of the 2003 Energy and Environment

Conference

ConferenceProceeding of the 2003 Energy and Environment
Country/TerritoryChina
CityChangsha
Period11/10/0314/10/03

Keywords

  • Acidogenic reactor
  • Anaerobic treatment
  • Fermentation types
  • Microbial community
  • Wastewater

Fingerprint

Dive into the research topics of 'Control of fermentation types in continuous-flow acidogenic reactors: Effects of pH and ORP'. Together they form a unique fingerprint.

Cite this