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Dynamic simulation of multicomponent reaction transport in water distribution systems
G R Munavalli1, M S M S Mohan Kumar
1Department of Civil Engineering, Indian Institute of Science, Bangalore 560 012, India.
Water Research
|April 17, 2004
Summary
Bacterial regrowth in water distribution systems can be predicted using a new multicomponent reaction transport model. This model helps identify areas with high organic carbon, bacterial growth, and low chlorine residuals for water supply management.
Area of Science:
- Environmental Engineering
- Water Quality Management
- Microbiology
Background:
- Bacterial regrowth in water distribution systems is a significant concern due to nutrient availability.
- Understanding the interplay between substrate (organic carbon), biomass, and disinfectant (chlorine) is crucial for managing water quality.
Purpose of the Study:
- To develop and validate a multicomponent reaction transport model to simulate bacterial growth in water distribution systems.
- To identify factors influencing bacterial regrowth and disinfectant decay.
Main Methods:
- Development of a multicomponent reaction transport model incorporating simplified expressions for bacterial growth, decay, attachment/detachment, substrate utilization, and disinfectant action.
- Incorporation of a bulk reaction parameter linked to organic carbon.
- Validation and application of the model to a hypothetical water network.
Main Results:
- The model successfully simulates the biodegradable organic carbon threshold, aligning with literature values.
- The model can predict the spread of contaminants within the system.
- Identified sensitive behaviors of model components.
Conclusions:
- The developed multicomponent model is a valuable tool for water supply authorities.
- It aids in pinpointing locations prone to high substrate concentrations, bacterial proliferation, and depleted chlorine residuals.
- Informed management of water quality and public health protection.