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AASHE 2010Net Zero and Water Regenerative Campus Me Green You Green Winston Huff, CPD, LEED® AP Smith Seckman and Reid Engineers MeGreenYouGreen.com
Campus Water Use • A recent report stated that Stanford University uses 2.7 million gallons of water per day. • University medical centers can use over 600 gallons per day per patient bed. • The typical response to this trend is to make the campus less bad on the environment and look at the plumbing fixtures. • In reality the plumbing fixtures use a small percentage of the total water usage.
LESS BAD CAMPUS TO A REGENERATIVE CAMPUS Currently a typical sustainable campus is “less bad” when compared to another campus Future Sustainable guides will move from a “Less Bad” campus to a “Net Zero” Campus. Beyond Net Zero is a campus that can be a Regenerative campus. A campus that heals environmental damage from pass campus activities. Or helps the campus community to be “Less Bad”
Biosphere and Water “Building systems should study, replicate and respect the earth’s biospheric systems to increase the quality of life.” Source - www.scienceinteractive.net
Typical building water systems • Plumbing fixtures are not the only systems that use water and create waste water in a building. • 28% of the water used in a typical office building serves the heating and cooling equipment. • Source – Water Smart Guide Book East Bay Municipal Utility District.
Decentralize • Most communities have large, centralized water and wastewater systems. • One possible option is to move to smaller systems that reduce the strain on centralized systems. • Yet what would these systems look like?
Alternate Water Source: • Rainwater • Plumbing fixtures • Condensate Supply: • Irrigation • Flush Fixtures • Vehicle wash Source – City of New York Water Conservation Manual (DDC) - http://www.megreenyougreen.com
CASE STUDY Green Site vs Standard Site - Which Costs More? Johnston Memorial Hospital, Clayton, North Carolina The green design would also allow stormwater to flow into the swales and reduce the amount of curb and guttering. Concrete car stops would be provided at the end of the parking areas where the front of the cars would protrude over the swale area. As a result there was less pavement needed in the parking lot. Diagram Hawkins Landscape Architects
HVAC Condensate Collection Vanderbilt - Medical Research Building III Biological /Sciences • System has been in operation for 5 years. • The system has collected over 1.9 million cubic Feet of water. • Saved $30,000 in municipal water charges. • It cost $60,000 to install during the building construction. • There are 5 collection units. • Air temperature of the units are running at 51 degrees with chilled water at 41 degrees. • The building has 4 units with a total of 450,000 cfm capacity. • 360,000 square feet building. • (4) 1,000 ton chillers Graphic Source – City of New York Water Conservation Manual (DDC) - http://www.megreenyougreen.com
Gray Water Systems • Gray water systems collect rain water or waste water from air- conditioning systems, showers, laundries, building process or lavatories and reuse it for landscaping irrigation or the plumbing flush fixtures. Source – City of New York Water Conservation Manual (DDC) - http://www.megreenyougreen.com
Blackwater System Blackwater Systems collect water from the flush fixtures and processes the water for other non-potable water uses. Building scale packaged systems are now available on the market today. These systems can decentralize the waste water municipal system. Source – City of New York Water Conservation Manual (DDC) - http://www.megreenyougreen.com
Waste Mining – Urine Collection • Urine contains nitrogen and phosphorus to produce fertilizer. • A building can have a separate urine piped system to collect the urine. • The urine is collected, processed and the micropollutants are removed. • The end product can be used for agriculture fertilizer. • How is the urine separated from the waste?? Dr. Tove LarsenUrban Water ManagementÜberlandstrasseDübendorf, Switzerlandhttp://www.novaquatis.eawag.ch
Urine Collection No-Mix Toilet • The Novaquatis study investigated water closets using NoMix technology. • The fixture has two compartments. • The front compartment collects urine. • The back compartment operates like a conventional toilet. • This way, one fixture can separate the urine from the main waste stream. Dr. Tove LarsenEawagUrban Water ManagementÜberlandstrasseDübendorf, Switzerlandhttp://www.novaquatis.eawag.ch
How they work • The system consist of a seat that resembles a typical toilet • waste enters a sealed composting area usually located in the floor below the toilet • a vent fan pulls air from the toilet room into the bowl and out the building Photo from: ClivusMultrum http://www.clivusmultrum.com/green-building-bronx.php
Eco-Restroom Bronx Zoo Photo from: ClivusMultrum http://www.clivusmultrum.com/green-building-bronx.php
Education Building Facebook Dashboards Buildings on campus can have a facebook page that can track water and energy use. Buildings can compete with each other.
Education Widgets • Water and energy widgets can be used for: • Education tools • Teach water and energy usage
What To Do Next? • Education program to educate water use. • Water/Energy How to manual for: • Architects/Engineer Designers • Contractors • Operators • Green Master Plan • Develop a Green Master • Stars • Set a goals when your campus: • Less Bad • Net Zero • Regenerative
For more information, please contact: www.ssr-inc.com www.MeGreenYouGreen.com Speaker’s contact information Winston Huff, CPD, LEED® AP Plumbing/Fire Protection/Project Manager/Sustainable Coordinator 2995 Sidco Drive Nashville, TN 37221 Smith Seckman Reid, Inc. 615-383-1113 fax 615-386-8469