Effects of preozonation on anaerobic biodegradability of o-cresol

Yi Tin Wang, Pin Chieh Pai, James L. Latchaw

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Ozone pretreatment studies of a refractory phenolic compound, ocresol, were conducted to evaluate the effects of ozonation on the anaerobic biodegradability and toxicity of the reaction products. Two types of batch studies, the biochemical methane potential (BMP) and the anaerobic toxicity assay (ATA), were performed on samples with and without preozonation. The ozonation products were well fermentable to methane after about 60% reduction in chemical oxygen demand (COD) or 32% reduction in dissolved organic carbon (DOC) was achieved by ozonation regardless of the initial concentration of o-cresol. Salicylic acid, glyoxylic acid, oxalic acid, propionic acid, acetic acid, and formic acid were the oxidation products identified. The reaction products formed in the basic pH range were more biodegradable and less inhibitory than those formed in the acid pH range. Phenol degradation was more susceptible to inhibition caused by ozonation products than was acetate utilization.

Original languageEnglish
Pages (from-to)336-347
Number of pages12
JournalJournal of Environmental Engineering (United States)
Issue number2
StatePublished - 1989

ASJC Scopus subject areas

  • General Environmental Science
  • Environmental Engineering
  • Environmental Chemistry
  • Civil and Structural Engineering


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