52. What type of disinfection system has the disadvantage that it would fail to provide residual disinfectant in the potable water?

An ultraviolet irradiator at the desalinator discharge to the potable water storage tank.
A brominator located at the desalinator discharge piping to the potable water storage tank.
A chlorinator located at the desalinator discharge piping to the potable water storage tank.
A chlorinator located at the potable water storage tank recirculation line.

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