Potential impact of methyl isobutyl ketone (MIBK) on phenols degradation in an UASB reactor and its degradation properties

Wei Wang, Kai Yang, Julian Muñoz Sierra, Xuedong Zhang, Shoujun Yuan, Zhenhu Hu

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)
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Abstract

Methyl isobutyl ketone (MIBK) as a solvent is extensively used for the phenols extraction from the wastewater, so it is unavoidable to expose in the effluent due to the solubility and leakage problem. The present study evaluated the impact of MIBK on phenols degradation in an UASB reactor and analyzed its degradation properties. The results indicated that the continuous dosing (0.1 g L−1) and impact (10 g L−1) of MIBK had limited effect on phenols removal (1–2% reduction) in the UASB reactor, but the specific methanogenic activity (SMA) values of sludge decreased by 45–75% after MIBK exposure. Anaerobic degradation rate of MIBK fitted well to a pseudo-first-order kinetic equation with respect to the initial concentration of 35 mg L−1 (k = 0.0115 h−1, R2 = 0.9664). Furthermore, the relative methane generation rate constants of MIBK were 0.00816, 0.00613, 0.00273, and 0.00207 d−1 at the initial concentrations of 0.1, 0.5, 5, and 10 g L−1, respectively. MIBK showed higher inhibitory effect on the methanogenesis than on phenols degradation. This study pointed out that the industrial installations should consider the influence of solvent on anaerobic treatment of phenolic wastewater.

Original languageEnglish
Pages (from-to)73-79
Number of pages7
JournalJournal of Hazardous Materials
Volume333
DOIs
Publication statusPublished - 2017

Keywords

  • Methyl isobutyl ketone
  • Phenolic compounds
  • Solvent
  • Specific methanogenic activity
  • UASB

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