Modeling disinfectant residuals
Just a heads-up—this section is still a work in progress! I’ll be revising and expanding it soon to make sure it’s as useful as possible. Curious about what’s already done or currently in the works? Check the changelog for updates.
Maintaining an adequate disinfectant residual, most commonly chlorine or chloramine, throughout the entire distribution system is a critical public health measure. It's the primary barrier against microbial contamination and regrowth within the network. This section focuses on how you can use your water quality model to simulate the decay of these vital disinfectants as water travels from the treatment plant to the furthest customer.
We'll cover the setup of chlorine (or other disinfectant) decay models, which typically involves differentiating between two main decay mechanisms: bulk decay occurring within the water column itself (as the disinfectant reacts with natural organic matter or other substances in the water), and wall decay resulting from reactions with the pipe materials, accumulated sediments, and biofilms lining the pipe surfaces.
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