Biological treatment of a high salinity chemical industrial wastewater

S. Belkin, A. Brenner, A. Abeliovich

Research output: Contribution to journalConference articlepeer-review

51 Scopus citations


Various laboratory-scale process configurations were tested for the biological treatment of a combined wastewater stream of several chemical factories. The untreated wastewaters, rich in halogenated organics (1250±389 mg/l DOC), were also highly saline (32±11 g/liter TDS 550 °C) and toxic (MicrotoxTM EC50 = 1.5±2.0%). Biphasic (anaerobic/aerobic) laboratory bench-scale reactor systems yielded reduction of dissolved organic carbon by 70 to 84%, in the absence and presence of powdered activated carbon, respectively. The anaerobic phase proved to be essential in all systems, both for dissolved organic carbon removal and for detoxification. Similar efficiencies were obtained in either activated sludge or aerated lagoon type reactors, but in the latter case, longer hydraulic retention times were required. DOC removal was found to decrease with increased salt concentration; however, a 50% efficiency was achieved even at 90 g/l TDS. Toxicity elimination as judged by the MicrotoxTM assay was highly variable in the absence of activated carbon but stable and efficient in its presence.

Original languageEnglish
Pages (from-to)105-112
Number of pages8
JournalWater Science and Technology
Issue number7-8
StatePublished - 1 Jan 1993
EventProceedings of the 5th International Conference on Environmental Quality and Ecosystem Stability - Jerusalem, Isr
Duration: 1 Jun 19921 Jun 1992


  • Anaerobic treatment
  • Biological treatment
  • Chemical wastewater
  • Microtox(TM)
  • Powdered activated carbon
  • Saline wastewater
  • Toxicity

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology


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