Efficiency of temporary storage of geothermal waters in a lake system: Monitoring the changes of water quality and bacterial community structures

Barbara Szirányi, Gergely Krett, Tünde Kosáros, Endre Janurik, Ferenc Pekár, Károly Márialigeti, Andrea K. Borsodi

Research output: Contribution to journalArticle

Abstract

Disposal of used geothermal waters in Hungary often means temporary storage in reservoir lakes to reduce temperature and improve water quality. In this study, the physical and chemical properties and changes in the bacterial community structure of a reservoir lake system in southeast region of Hungary were monitored and compared through 2 years, respectively. The values of biological oxygen demand, concentrations of ammonium ion, total inorganic nitrogen, total phosphorous, and total phenol decreased, whereas oxygen saturation, total organic nitrogen, pH, and conductivity increased during the storage period. Bacterial community structure of water and sediment samples was compared by denaturing gradient gel electrophoresis (DGGE) following the amplification of the 16S rRNA gene. According to the DGGE patterns, greater seasonal than spatial differences of bacterial communities were revealed in both water and sediment of the lakes. Representatives of the genera Arthrospira and Anabaenopsis (cyanobacteria) were identified as permanent and dominant members of the bacterial communities.

Original languageEnglish
Pages (from-to)395-413
Number of pages19
JournalActa microbiologica et immunologica Hungarica
Volume64
Issue number4
DOIs
Publication statusPublished - Dec 2017

Keywords

  • Bacterial diversity
  • DGGE
  • Geothermal water
  • Reservoir lake system
  • Temporal and spatial changes
  • Water quality

ASJC Scopus subject areas

  • Immunology and Microbiology(all)

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