Innovative Green Building- High Rise Residential -

Water Reuse

American Water Applied Water Management Group

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Beneficial Reuse For This Project Includes:

Toilet Flush Water

Cooling Tower Make up Water

Irrigation Water for Teardrop Park

Treated Effluent Storage Tanks In Basement Equipment Room

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Background

• 293 units293 units• 25,000 GPD WW treatment 25,000 GPD WW treatment

plantplant• WW Treatment in basement WW Treatment in basement

of luxury, apartment buildingof luxury, apartment building• LEEDLEEDTMTM Gold Certification Gold Certification

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Reasons For Wastewater Reuse• To comply with BPCA Residential Environmental Guidelines

• To satisfy LEEDTM

Water Efficiency Credits

• To fulfill NYCDEP Comprehensive Water Reuse Program requirements to gain 25% reduction in water & sewer rates

• High density of units helped to minimize extra plumbing costs

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Wastewater System Features

• Membrane Bioreactor System

• Ozone system for color removal

• Activated carbon odor control system

• Multiple barrier approach for disinfection

- Membranes have an effective pore size of approximately 0.4 micron

- Ozone is a powerful oxidant

- UV system follows ozone

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Wastewater System Features- continued

• Continuous circulation of water storage tank contents through ozone and UV systems

• Automatic potable water fill valves at water storage tanks to ensure uninterrupted supply of flush water

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Potable Water

Wastewater

Discharge to NYC Sewers

Feed Tank

Transfer to treatment

Membrane Bio ReactorMembrane Bio Reactor

UV/Ozone Disinfection

Water storage tanks

Booster Pumps

To Irrigation

Aerobic Membrane Filters

Treated Effluent

Recycled Flush Water

Cooling Tower Make-Up

Cooling Tower Make-Up

Feed Pumps

Membrane Pumps

Aeration Blowers

AnoxicTrash Trap

Schematic Flow Diagram

8Treatment Equipment Room

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Treated Effluent Quality

Based on 18 months data:

CBOD <6.5 mg/l

TSS <1.5 mg/l

Fecal Coliform <10/100 ml

Turbidity <0.2 NTU

NH4 – N <0.2 mg/l

pH 6.5 – 7.4

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Solaire Water Usage

Reclaimed Water Usage

Toilets Ave. 9,040 gpd

Cooling Tower

Ave. 7,770 gpd

Cooling Tower Usage

Reuse Water

Ave. 7,700 gpd

Potable Water

Ave. 2,400 gpd

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Solaire Water Usage

Reuse 16,800 gpd average – 34%

Potable 32,100 gpd average – 66%

Total Building Consumption

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Comparison to Conventional Bldg

Conventional Bldg – Total Use (Potable)

Solaire Total Use (Pot. + Reuse)

Solaire Potable Use

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Benefits of Water Reuse

Urban reuse can effect significant reductions in potable water demand

Urban reuse applications help reduce stress on water and wastewater infrastructure.

Based on the success of the Solaire, similar reuse systems will be installed in future Battery Park City buildings