Waste Water Treatment Plant
The photographs are of basic methods of treatment at Sewer District 21 SUNY at Stony Brook Wastewater plant. This facility treats approximately 2 million gallons a day and consistently meets all New York state D.E.C. and U.S. E. P.A. Discharge limits.
A-Rough filtering- this is used for the removal of sanitary debris found in wastewater.
B-Oxidation ditch-This tank maintains a healthy environment for the breakdown of organic material utilizing microorganisms. The treatment is rather unique as it simultaneously reduces ammonium compounds to nitrates and nitrites, (Nitrification) and then reduces these compounds to nitrogen gas and releases it to the atmosphere, (de-nitrification).
C-Clarifiers or settling tanks- These tanks utilize the slowing of flow to create a quiescent zone in the tank to allow the microorganisms to collect at the bottom of the tanks and where they are pumped to reseed and propagate in the oxidation ditch to treat the incoming wastewater The clarified wastewater is then pumped to Port Jefferson for disinfection and outfall.
D- Ultraviolet disinfection -The clarified effluent flows through ultraviolet light to be disinfected and then is released into Long Island Sound.