Green News

 

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Des Moines Metropolitan
Wastewater Reclamation Authority
3000 Vandalia Road
Des Moines, IA 50317
515-323-8000

Disinfection

Back to Plant Processes

Liquid flows to the chlorine contact tanks where chlorine is injected into the flow. Chlorine kills most bacteria.  The final effluent discharged to the river is now cleaner than the river itself with a BOD5 less than 5 PPM, ammonia less than 1 PPM, and suspended solids less than 5 PPM. Also, not only as a cost saving measure, but as an important conservation measure, a portion of the final effluent is reused at the plant for process and washing water.