Water Recirculation - Drinking Water Storage Tanks
Water Recirculation - Drinking Water Storage Tanks
(OP)
I have a question regarding water recirculation. Let me explain the circumstances and maybe someone has a solution or suggestion.
We'll be getting our potable water from the municipality but it's likely going to be of questionable quality so we'll be treating incoming water via osmosis and chlorine. We'll be storing the treated water in storage tanks and based on the use of the occupants the retention of the water in the tanks will likely be approximately two weeks. Currently, the water network has not been designed with recirculation.
Questions:
1) With a retention time of two weeks is recirculation justified? Does anyone know of any sources of info?
2) Normally how long can treated water be stored before residual chlorine levels deplete to below acceptable levels?
We'll be getting our potable water from the municipality but it's likely going to be of questionable quality so we'll be treating incoming water via osmosis and chlorine. We'll be storing the treated water in storage tanks and based on the use of the occupants the retention of the water in the tanks will likely be approximately two weeks. Currently, the water network has not been designed with recirculation.
Questions:
1) With a retention time of two weeks is recirculation justified? Does anyone know of any sources of info?
2) Normally how long can treated water be stored before residual chlorine levels deplete to below acceptable levels?





RE: Water Recirculation - Drinking Water Storage Tanks
RE: Water Recirculation - Drinking Water Storage Tanks
A storage time of 2-3 days would probably be the ideal. You have much more than that.
You proably want to maintain a free chlorine residual of at least 0.2 to 0.4 mg/l to maintain bacteriological control of the water supply. You probably can not maintain the residual without a recirculation system.
A small pumped recirculation system with a chlorine booster is probably the most reasonable approach.
Here is a study that may help:
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RE: Water Recirculation - Drinking Water Storage Tanks