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PROCESS DESCRIPTION
The NuWater BNR Wastewater Treatment System is designed for treating domestic
wastewater generated by normal household activities. The system consists of a single
tank utilizing the extended aeration activated sludge process. The system is capable of
producing an effluent which meets or exceeds applicable state discharge standards. This
system has been successfully tested in accordance with National Sanitation Foundation
(NSF) Standards 245 and 40.
Treatment begins when wastewater from the home flows into the pretreatment zone of
the system. Here, the organisms begin to break down and convert the waste into gases
and additional microbes. This is also where nitrate is converted to nitrogen gas. The
partially broken down waste then enters the treatment area, or aeration chamber. In the
treatment area, waste is continually exposed to microbes for the remainder of the
treatment process. The digestion action of the aerobic microbes results in a lower
concentration of pathogenic bacteria.
After average retention time in the aeration zone of 24 hours or more, the mixture enters
the clarifier where calm conditions enable separation of microbes, solids, and treated
wastewater. The microbes that settle out of the water sweep back into the aeration
chamber where they are again beneficial in wastewater treatment. The proprietary airlift
provides for a portion of the treated wastewater to be returned to the pre-treatment zone
for additional treatment and de-nitrification.
The result of aeration and quiescent separation, followed by recirculation is an effluent
that is clear, odorless, and low in nutrients which may be discharged according to local
health regulations. The NuWater BNR Wastewater treatment system is available in
concrete and polyethylene. Materials are subject to state approval.
Summary of Contents for BNR 500 GPD
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