On-line estimation of the dissolved zinc concentration during ZnS precipitation in a continuous stirred tank reactor (CSTR)

T.I.M. Grootscholten, K.J. Keesman, P.N.L. Lens

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

In this paper a method is presented to estimate the reaction term of zinc sulphide precipitation and the zinc concentration in a CSTR, using the read-out signal of a sulphide selective electrode. The reaction between zinc and sulphide is described by a non-linear model and therefore classical observer theory cannot be applied directly, as this theory was initially developed for linear systems. However, by linear reparametrization of this non-linear system, the linear observer theory can be applied in an effective way. This is illustrated by a zinc sulphide example using real data.
Original languageEnglish
Pages (from-to)1627-1633
JournalWater Science and Technology
Volume57
Issue number10
DOIs
Publication statusPublished - 2008

Keywords

  • surface water
  • waste water treatment
  • heavy metals
  • zinc
  • chemical precipitation
  • removal
  • sulfides
  • selectivity
  • water treatment
  • metals

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