Preparation and application of novel catalytic-ceramic-filler in a coupled system for TNT manufacturing wastewater treatment

Suqing Wu, Yuanfeng Qi, Shengbing He, Chunzhen Fan, Bibo Dai, Weili Zhou, Lei Gao, Jungchen Huang

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

2,4,6-Trinitrotoluene (TNT) has been widely used in military and civilian blasting all over the world, causing great concern with regard to its toxicity to environment and human health. Our research investigated preparation and application of the catalytic-ceramic-filler in the catalytic micro-electrolysis coupled with a biological aerated filter for TNT manufacturing wastewater treatment. As a possible pretreatment process of TNT manufacturing wastewater, catalytic micro-electrolysis packed with the catalytic-ceramic-filler had higher TNT and chemical oxygen demand removal (98.73% and 65.49%, respectively) than traditional micro-electrolysis at the optimum hydraulic retention time of 4.0h and slight aeration (dissolved oxygen of about 2.0mgL-1). Subsequently, biological aerated filter applied as the secondary biological treatment removed 81.68% of the influent chemical oxygen demand at the optimum hydraulic retention time of 16.0h. Moreover, the coupled catalytic micro-electrolysis and biological aerated filter system could remove chroma values by 95.21%. The residual TNT (1.5-1.6mgL-1), chemical oxygen demand (57.0-84.6mgL-1) and chroma (7.9-17.2) in the effluent met the national discharge standard (GB 14470.1-2002, TNT concentration ≤5.0mgL-1, chemical oxygen demand ≤100mgL-1, chroma ≤50).

Original languageEnglish
Pages (from-to)417-425
Number of pages9
JournalChemical Engineering Journal
Volume280
DOIs
Publication statusPublished - 2015 Nov 5

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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