A new Thioalkalivibrio sp. strain isolated from petroleum-contaminated brackish estuary sediments: A new candidate for bio-based application for sulfide oxidation in halo-alkaline conditions

Simone Becarelli, Salvatore La China, Alla Lapidus, Andrey Prijibelski, Dmitrii Polev, Giulio Petroni, Simona Di Gregorio

Research output

Abstract

A new halo-alkaline sulfur-oxidising bacterial strain was isolated from brackish estuary sediments contaminated by total petroleum hydrocarbon. The isolate was classified as a new strain of Thioalkalivibrio sulfidiphilus sp., showing a higher capability of adaptation to pH and a higher optimal sodium concentration for growth, when compared to Thioalkalivibrio sulfidiphilus sp. HL-EbGr7, type strain of the species. The strain was capable to grow in saline concentrations up to 1.5 M Na+ and pH up to 10. The genome of the new isolate was sequenced and annotated. The comparison with the genome of Thioalkalivibrio sulfidiphilus sp. HL-EbGr7 showed a duplication of an operon encoding for a putative primary sodium extruding pump and the presence of a sodium/proton antiporter with optimal efficiency at halo-alkaline conditions. The new strain was able to oxidize sulfide at halo-alkaline conditions at the rate of 1 mmol/mg-N/h, suitable for industrial applications dedicated to the recovery of alkaline scrubber for H2S emission absorption and abatement.

Original languageEnglish
Article number1385
Number of pages16
JournalWater (Switzerland)
Volume12
Issue number5
DOIs
Publication statusPublished - 1 May 2020

Scopus subject areas

  • Water Science and Technology
  • Geography, Planning and Development
  • Aquatic Science
  • Biochemistry

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