Photoinhibition of microbial nitrification in potable water

摘要

A method for providing a dose of visible light in covered drinking water storage facilities to control nitrification. In one embodiment, the method includes irradiating the water with a dose of visible light sufficient to inhibit microbial nitrification of the water. In one embodiment, the dose of visible light has a wavelength from approximately 400 Hz to approximately 700 Hz. In another embodiment, the dose of visible light has a wavelength from approximately 550 Hz to approximately 700 Hz. In a further embodiment, the dose of visible light has a wavelength from approximately 380 Hz to approximately 430 Hz.

主权项

1. A method of storing potable water in a drinking-water storage facility, comprising:
containing the potable water in a covered storage tank, the potable water comprising a chloramine disinfectant having a concentration safe for human consumption; and illuminating the potable water with a dose of visible light from one or more lamps,
wherein the illuminating of the potable water conserves a residual concentration of the chloramine disinfectant in the potable water by inhibiting oxidation by nitrifying microbes of ammonia in the potable water produced by degradation of the chloramine disinfectant, andwherein the dose of visible light has a wavelength from approximately 380 nm to approximately 430 nm.