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We are always learning from the projects we complete - and want to share that learning with you! Here are some recent client projects.
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| RAINWATER HARVESTING PROJECTS |
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| Client: City of Chicago, Illinois |
| Project: Center on Halsted, 2007 |
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Challenge: Center on Halsted, a new construction mixed use community center in Chicago, wanted to minimize its consumption of municipal water and actively embrace sustainability features. The City of Chicago envisioned a system that would utilize rainwater and groundwater harvesting to flush the 30 toilets and urinals planned for the building.
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Solution: A system was developed to capture, clean and store up to 1500 gallons of rainwater and groundwater. The system uses a number of sensors and intelligent processes to identify when water sources are available, to regulate storage amounts and supplement water supply when necessary. A recirculation system continuously monitors water condition and applies redundant chlorination and UV sterilization. The result is a constant supply of clean, odorless water used to flush toilets.
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Center on Halsted, Chicago, Illinois |
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Results: Chicago’s ample precipitation and groundwater supply on average of 50% of the system requirements. The redundant sterilization system ensures that the water is free of biological contaminants. The automatic control system tied to the building’s automation system constantly monitors key parameters and notifies building staff when maintenance or operator involvement is needed. The City of Chicago is delighted with the system results and is currently planning water harvesting systems for several new buildings.
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| Client: Panduit Corporation |
| Panduit is a leading, world-class developer and provider of innovative networking and electrical solutions. |
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| Project: The company planned a 280,000 square foot new world headquarters building in Tinley Park, IL., 2008-2009. |
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Challenge: To realize energy savings and to provide a healthy workplace and planet, the company wanted to achieve Leadership in Energy and Environmental Design (LEED) Gold certification with the 5-story building. President Tom Donovan explained that the company planned “to reinforce our commitment to the environment and sustainability.” Part of that plan was to incorporate a rainwater harvesting system to support the flushing of the 60 toilets and 37 urinals in the building. Special engineering consideration was required to accommodate the maximum door width of 66 inches into the utility area that was planned for the harvesting system.
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Solution: The initial rainwater harvesting system design was modeled from the Center on Halsted building project. This helped reduce engineering costs, while still allowing for the unique needs of the building. Both rainwater and groundwater from basement sump pumps are captured, filtered and then stored in two 1,000 gallon tanks housed in the basement utility area. Chlorine sterilization was selected to eliminate any pathogens and to keep the water clear.
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Results: Equipment is expected to be installed late in 2008 with Panduit’s building scheduled for completion in 1st Quarter, 2009. The system is expected to be able to support approximately 50% of the building’s water needs for flushing toilets and urinals.
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| GREYWATER HARVESTING PROJECTS |
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| Client: Mercy Housing, Chicago, IL |
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Project: The Margot and Harold Schiff Residences , 1244 N. Clybourn, Chicago, IL. 2007. The newest project of Mercy Housing Lakefront, combines a cost-effective and nationally recognized approach to ending and preventing homelessness with major design innovations in an important community setting. Each unit has a private bath, kitchen, central air and heat. The building’s design also includes common areas and outdoor space for activities, socializing and education.
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Challenge: Support efforts to demonstrate sustainability in 96-unit housing building with both rainwater and greywater harvesting systems. Supply enough greywater to flush nearly 100 toilets without needing to use municipal water.
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The recently completed Schiff Residences in Chicago employs a number of sustainable features including solar electric & hot water, wind power and both greywater and rainwater harvesting.
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Solution: Wahaso worked with building engineers to install twin systems that handle and store greywater and rainwater separately so that each can serve different uses. Water from the apartment showers, bath tubs and sinks is directed through a different waste system than the toilets to the basement where it is filtered , sterilized and then stored in a 1,000 gallon tank. Rainwater is channeled from the roof through a separate filtering system and stored in a 500 gallon tank.
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Results: The greywater harvesting system is able to supply 100% of the water requirements for flushing toilets in the building’s 96 units. The modest rainwater storage capacity is able to supply all water needed for irrigation due to the use of prairie grasses that do not require large amounts of water between rain events. The City of Chicago views the building as an important demonstration project in pioneering the feasibility of similar systems in other building projects.
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Separate greywater and rainwater storage tanks in the Schiff Residency center in Chicago |
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| OTHER PROJECTS IN PROCESS |
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Wahaso is engaged in dozens of projects that each present a unique set of challenges and opportunities for water harvesting. The following is a partial list of current projects that exemplify the range of harvesting challenges we have addressed. We'd love to help you with your project.
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| Social Security Administration |
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| Harold Washington Building, Chicago, IL |
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Retrofit existing 1970's era building: Harvest rainwater, condensate and groundwater to flush toilets, irrigate landscaping, make-up boiler water and cooling-tower water
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| City of New York, NY |
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| New sanitation building seeking LEED certification: Harvest rooftop rainwater and boiler condensate to flush toilets. |
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| City of Madison, WI |
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| New firestation seeking LEED Platinum certification: rainwater harvesting for irrigation and fire drills |
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| New York State |
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| Upgrading hospital prison building to use for housing: Capture rainwater and greywater to flush toilets. |
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| City of Chicago, IL |
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New elementary school seeking LEED certification: Harvest rainwater for garden irrigation and educational purposes; custom data interface to track water harvested
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| U.S. Military, Cherry Point, N.C. |
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| Two new bachelors enlisted quarters building: Rainwater & greywater harvesting to flush toilets |
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| City of Chicago, IL |
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| Rainwater to flush toilets in two new park comfort stations. First use of Atlantis system for subterranean storage in Chicago. |
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| Tower of Faith Church, Compton, CA |
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| Capture greywater to flush toilets throughout the church buildings |
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| Chicago, IL |
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| Urban farming green house: Recycle rainwater for commercial greenhouse irrigation in urban setting |
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