Anaerobic treatment of low-strength wastewater with a high fraction of particulate matter in an unconventional two-phase ASBRs system

Andres Donoso-Bravo, Gonzalo Ruiz-Filippi, Rolando Chamy

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The results of a two-phase anaerobic system using anaerobic sequencing batch reactors (ASBRs), treating low-strength wastewater (COD ∼ 500 mg/L) with a high fraction of particulate organic matter (70%, COD basis), are presented. Two reactors in series were used; the first one was hydrolytic-acidogenic, while the second one was methanogenic. This configuration was proposed to promote high efficiency solids removal. During the experiment, 69% and 50% efficiencies of total COD removal were obtained for OLRs of 0.63 and 1.22 kgCOD/(m3 d), respectively. Values of the solubilized organic fraction (SOF) achieved in the hydrolytic-acidogenic reactor were within the range of 0.3-0.6 gCODsolubilized/gpCODremoved, and the average acidified organic fraction (AOF) was 0.6 gCODVFA-produced/gsCODfed. The methanogenic reactor had a VFA removal fraction (VFARF) between 0.4 and 0.6 gCODVFA-removed/gCODVFA-fed for the OLR of 0.63 and 1.22. The two-phase ASBR system is suitable, and can be implemented, for the anaerobic treatment of this kind of wastewater.

Original languageEnglish
Pages (from-to)297-302
Number of pages6
JournalBiochemical Engineering Journal
Volume43
Issue number3
DOIs
StatePublished - 15 Mar 2009
Externally publishedYes

Keywords

  • Acetic acid
  • Anaerobic processes
  • Anaerobic sequencing batch reactor
  • Domestic wastewater
  • Two-phase system
  • Wastewater treatment

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