Volatile fatty acid production dynamics during the acidification of pretreated olive mill wastewater

Canan Can Yarimtepe, Nilgün Ayman Oz*, Orhan Ince

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

This study focuses on the dynamics of VFA production from pretreated olive mill wastewater (OMW). Acidogenic anaerobic sequencing batch reactors (AcASBR) were operated with the pretreated OMW at hydraulic retention time (HRT) of 2 days and pH of 5,5 for different organic loading rates (OLRs) ranging from 5 g COD/L.d to 40 g COD/L.d. VFA production reached to the highest value of about 27,000 mg/L with the increase in the organic load applied (20 g COD/L.d). The highest acidification rate was calculated as 68%. Acetic acid was found to be as the dominant VFA compound for all stage of the study. At steady state, VFA production during a day-cycle period (24th hour) in AcASBR is also monitored, VFA production gradually increased after the 3rd and 6th hours (about 20%) and a rapid increase (about 40%) was observed reaching the maximum at the end of the cycle (24th hour).

Original languageEnglish
Pages (from-to)936-944
Number of pages9
JournalBioresource Technology
Volume241
DOIs
Publication statusPublished - 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • Acidification
  • Byproduct
  • Electrocoagulation pretreatment
  • Olive mill wastewater
  • Resource recovery
  • VFA production

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