Selenium recovery from kiln powder of cement manufacturing by chemical leaching and bioreduction

S. Soda, A. Hasegawa, M. Kuroda, A. Hanada, M. Yamashita, M. Ike

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A novel process by using chemical leaching followed by bacterial reductive precipitation was proposed for selenium recovery from kiln powder as a byproduct of cement manufacturing. The kiln powder at a slurry concentration of 10 w/v% with 0.25 M Na2CO3 at 28 °C produced wastewater containing about 30 mg-Se/L selenium. The wastewater was diluted four-fold and adjusted to pH 8.0 as preconditioning for bioreduction. A bacterial strain Pseudomonas stutzeri NT-I, capable of reducing selenate and selenite into insoluble elemental selenium, could recover about 90% selenium from the preconditioned wastewater containing selenium of 5 mg-Se/L when supplemented with lactate or glycerol. The selenium concentrations in the treated wastewater were low around the regulated effluent concentration of 0.1 mg-Se/L in Japan.

Original languageEnglish
Pages (from-to)1294-1300
Number of pages7
JournalWater Science and Technology
Volume72
Issue number8
DOIs
Publication statusPublished - 2015 Oct

Keywords

  • Biological reduction
  • Cement manufacturing
  • Chemical leaching
  • Kiln powder
  • Selenium

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

Fingerprint Dive into the research topics of 'Selenium recovery from kiln powder of cement manufacturing by chemical leaching and bioreduction'. Together they form a unique fingerprint.

  • Cite this