MIB-producing cyanobacteria (Planktothrix sp.) in a drinking water reservoir

distribution and odor producing potential

Ming Su, Jianwei Yu*, Junzhi Zhang, Hui Chen, Wei An, Rolf D. Vogt, Tom Andersen, Dongmin Jia, Jingshi Wang, Min Yang

*Corresponding author for this work

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The production of odorant 2-methylisoborneol (MIB) in water bodies by Planktothrix sp. have not been understood very well. Through a four-year investigation in Miyun Reservoir, a huge mesotrophic drinking water reservoir known to have the MIB episodes, we found that the Planktothrix sp. bloomed during September and October causing the high levels of MIB in the reservoir. The concentration of MIB and the biomass of MIB-producing cyanobacteria Planktothrix were measured (n = 887) at different sites and depths during different seasons. The results indicated that the shallow region of the reservoir is the major habitat for Planktothrix sp. due to that the light is able to penetrate down to the relatively high concentrations of nutrients close to the sediments. Quantile regression analysis between Planktothrix biomass and MIB concentration shows that the risk of MIB exceeding the odor threshold (15 ng L⁻¹) in water was as high as 90% when the Planktothrix density was more than 4.0 × 10⁵ cells L⁻¹, while the risk was reduced to 10% when the Planktothrix density remained below 1.6 × 10⁴ cells L⁻¹. This study will improve the understanding of the environmental behaviors of Planktothrix sp., and can provide useful information for better management of drinking water lakes/reservoirs experiencing the taste and odor (T&O) problems caused by deep living cyanobacterial species.

Original languageEnglish
Pages (from-to)444-453
Number of pages10
JournalWater Research
Volume68
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Keywords

  • 2-methylisoborneol
  • Drinking water
  • Low irradiance specialist cyanobacteria
  • Planktothrix
  • Taste and odor

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