Scale-up of BDD anode system for electrochemical oxidation of phenol simulated wastewater in continuous mode

Xiuping Zhu, Jinren Ni, Junjun Wei, Xuan Xing, Hongna Li, Yi Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

46 Citations (Scopus)

Abstract

Scale-up of boron-doped diamond (BDD) anode system is significant to the practical application of electrochemical oxidation in bio-refractory wastewater treatment. In this study, the performance of a smaller BDD anode (24cm2) system in continuous mode electrochemical oxidation of phenol simulated wastewater was first investigated and well described by the response surface methodology (RSM). Furthermore, the RSM was extended to examine the scale-up feasibility of BDD anode systems with similar configurations. It was demonstrated that both COD degradation efficiency and specific energy consumption could be expected at the same level even as the system was enlarged over 100 times, which implied that BDD anode system could be successfully scaled up through controlling the same retention time, current density, initial COD, and conductivity conditions. Based on this study, a larger BDD anode (2904cm2) system was constructed and systematic measurements were made on its performance in electrochemical oxidation of phenol simulated wastewater. Very good agreement was found between measured and predicted results by RSM. At the optimized conditions, the larger BDD anode system could easily reduce the COD of phenol simulated wastewater from 633mgL-1 to 145mgL-1 (<150mgL-1, National Discharge Standard of China) during 80min with specific energy consumption only 31kWhkgCOD-1.

Original languageEnglish
Pages (from-to)493-498
Number of pages6
JournalJournal of Hazardous Materials
Volume184
Issue number1-3
DOIs
Publication statusPublished - 13 Sep 2010
Externally publishedYes

Keywords

  • Boron-doped diamond anode
  • Electrochemical oxidation
  • Phenol
  • Response surface methodology
  • Scale-up

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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