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Anaerobic treatment of phenol in wastewater under thermophilic condition

  • H. H.P. Fang*
  • , D. W. Liang
  • , T. Zhang
  • , Y. Liu
  • *Corresponding author for this work
  • The University of Hong Kong
  • Fudan University

Research output: Contribution to journal › Article › peer-review

Abstract

Over 99% of phenol was effectively degraded in an upflow anaerobic sludge blanket (UASB) reactor at 55°C with 40 h of hydraulic retention time (HRT) for a wastewater containing 630 mg/L of phenol, corresponding to 1500 mg/L of chemical oxygen demand (COD) and a loading rate of 0.9 g-COD/L/d. The maximum specific methanogenic activity (SMA) of the phenol-degrading sludge was 0.09 g-CH4-COD/g-volatile suspended solids (VSS)/d. Based on 16S rDNA analysis, a total of 21 operational taxonomy units (OTUs) were found in the sludge, of which eight (42.6% of the total population) were related to the sequences in the GenBank with similarity of over 97%, and 13 (79.6%) were affiliated with the known thermophilic species. Additional SMA data and phylogenetic analysis suggest that the degradation pathway of phenol for thermophilic sludge was likely via caproate, instead of benzoate as for the mesophilic sludge.

Original languageEnglish
Pages (from-to)427-434
Number of pages8
JournalWater Research
Volume40
Issue number3
DOIs
StatePublished - Feb 2006
Externally publishedYes

Keywords

  • 16s rDNA
  • Anaerobic degradation
  • Benzoate
  • Caproate
  • Phenol
  • Thermophilic

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