Ecological characteristics of phytoplankton and in-situ control mechanisms of odor-producing cyanobacteria in source water reservoirs
- From: the National Science Foundation of China
- Founding: ￥3.00 M
- Host: Min Yang
- Period: Jan, 2021 - Dec, 2025
- Grant No.: 5203000591
The taste & odor (T&O) problems caused by typical earthy-smelly odorant MIB (2-methylisopropanol) are frequently observed in source water reservoirs, it has become an essential water quality issue regarding the drinking water safety in China. Filamentous cyanobacteria have been identified as the main producers of MIB in surface water. MIB removal in drinking water plant is limited even by advanced treatment process, hence it has great potential to solve the odor problem by controlling the growth of odor producing cyanobacteria (OPC) in source water. Preliminary study revealed that the sub-surface and deep layer in the water column is the preferred niche for OPC, the underwater light turns to be a key driver of them. This project proposed an in-situ control strategy based the ecological characteristics of OPC. The temporal and spatial distribution of the dominant cyanobacteria and OPC will be investigated in various reservoirs in China, and the relationship between their growth and environmental factors as well as the competition with dominant cyanobacteria will be identified by both pure and mix culture experiments in laboratory; the key driving factors to control the OPC will be subsequently sorted out. Coupled with the growth model of OPC, the hydrodynamic model in a particular reservoir will be established, and the control mechanism and strategy based on the ecological characteristics of OPC will finally proposed as the main output of this project. This study can improve the knowledge of OPC, and can open a new approach to solved the odor problem in drinking water.