Removal of organic matters in pesticide wastewater by supercritical water oxidation

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Supercritical water oxidation (SCWO) is an alternative to effectively dispose many varieties of organic wastewaters. In this article, a high concentration pesticide wastewater with very complicated components was handled by SCWO in a batch experimental plant at 25 MPa, 410-580 °C within the oxidant coefficient of 1.1-4.0 and the residence time of 1.0-10.0 min. The results show that reaction temperature, oxidant coefficient, residence time can improve XCOD (removal efficiency of chemical oxygen demand) of reactor effluent. XCOD reaches up to 99.89% at 550 °C, 25 MPa with the oxidant coefficient of 3.0 and the residence time of 5.0 min, and the corresponding COD concentration is 73 mg/L. Residence time indicates a relatively more important influence on COD1 at higher reaction temperatures and OCs. Furthermore, possible reaction pathways for SCWO of organic matters in the pesticide wastewater were also proposed primarily.

Original languageEnglish
Title of host publicationAdvances in Environmental Technologies III
PublisherTrans Tech Publications Ltd
Pages2340-2348
Number of pages9
ISBN (Print)9783038351351
DOIs
StatePublished - 2014
Event3rd International Conference on Energy and Environmental Protection, ICEEP 2014 - Xi'an, China
Duration: 26 Apr 201428 Apr 2014

Publication series

NameAdvanced Materials Research
Volume955-959
ISSN (Print)1022-6680
ISSN (Electronic)1662-8985

Conference

Conference3rd International Conference on Energy and Environmental Protection, ICEEP 2014
Country/TerritoryChina
CityXi'an
Period26/04/1428/04/14

Keywords

  • Oxidation
  • Pesticide wastewater
  • Removal efficiency
  • Supercritical water

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