Senteno Photo Credit httpstormpoocomindexphpabout Overview Environmental Benefits Research with the MODS Savings Cost Conclusion Composting Toilet in the North Cascades WA ID: 1048144
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1. Composting Toilets By Isabelle Senteno Photo Credit: http://stormpoo.com/index.php?/about/
2. OverviewEnvironmental Benefits Research with the MODSSavings!CostConclusionComposting Toilet in the North Cascades, WA
3. Environmental BenefitsPOLLUTIONENERGYBrightwater Wastewater treatment plant for Seattle AreaCost of construction: $500 millionPhoto Credit: http://cdmsmith.com/en-US/Insights/Features/Managing-the-Complex.aspx#WATER
4. Possibilities Envirolet Composting toilet @ Bertschi Science School, Seattle WAClivus Multrum Composting Toilets @ Warren Wilson College, Ashville, NCPhoto Credit: http://www.bertschi.org/who-we-are/our-campus/science-wing/http://inside.warren-wilson.edu/~ELC/New_ELC_Website_/compostingtoilet.phphttp://www.sru.edu/academics/colleges/ches/macoskey/Pages/PhotoTour-CompostingToilet.aspxClivus Multrum Composting Toilet @ Slippery Rock University, Slippery Rock, PA
5. The MODSResearch Question: How would installing a composting toilet system in MOD residential housing benefit Evergreen?MOD housing has 6 residents Sustainability ProjectsRetrofitting for a composting toilet is difficultIn a new MOD building installation is possiblePermitting DOH in WACost is the biggest barrierPhoto Credits: http://blogs.evergreen.edu/radsustainability/
6. Water Savings!6 people per MODToilet use per person: 5/dayAmount of water in a toilet flush: 1.6 Gallons 48 gal per MOD/day1,440 gal per MOD/month12,960 gal per MOD per year!A composting toilet uses 2 tablespoons per flushSome don’t use any water at all! These are called Dry Flush ToiletsPhoto Credit: http://www.ecofilms.com.au/tanias-compost-toilet-tour/
7. Money SavingsHypothesis: Because the water savings are so much, I thought the money savings would correspond. Therefore, an expensive composting toilet system would pay off quickly. Price per gallon of water in Olympia: $0.0071.6 gal per flush1.6 gal flush x $0.007 = $0.011 per flushCost per MOD (6 people) per school year (9 months)Findings: Because the price of water is so cheap and the composting toilet system so expensive, the system would take many years to pay off. 5 flushes per person per dayCost per MOD per month= $10.08Cost per MOD per year (9 months) = $90.72
8. COST Clivus Multrum complete composting toilet system for 50 uses per day: $5,995.00Phoenix Composting toilet system: $6,300.00Image Credit: Thttp://activerain.com/image_store/uploads/5/2/9/9/6/ar125056488169925.jpg
9. ConclusionInstalling a composting toilet system in the MODS is possible (confidence)A lot of work (high confidence) Composting toilet systems are EXPENSIVEThe price of water is too cheap for an expensive composting toilet system to be economicalMust value environmental benefits over the cost A composting toilet in the MODS would save…12,960 gallons water per school year$90.72 on water per school year3459.95 CO2 equivalent pounds/school year
10. E.J. Zita helping with calculationsBrian Barry with Clivus MultrumJoe Martino with RAD Sustainability AcknowledgementsPhoto Credit: http://www.notonthehighstreet.com/freerangedesigns/product/gypsy-caravan-compost-toiletPhoto Credit: http://www.portageportabletoilets.com/services
11. Works CitedC. Anand, D.S. Apul, “Economic and Environmental Analysis of Standard, High Efficiency, Rainwater Flushed, and Composting Toilets,” Journal of Environmental Management, Volume 92, Issue 3, Pages 419-428, 2011. http://www.sciencedirect.com/science/article/pii/S0301479710002537Hause, Jennifer. http://www.biolet.com/resources/documents/nesc-what-is-a-composting-toilet.pdfhttp://www.compostingtoilet.com/?page_id=401Jenkins, Joseph. http://humanurehandbook.com/manual.htmlSmith-Gardiner, Nina, “Composting Toilets at the Bullitt Center,” Living Proof Blogs, Jun 14, 2012. http://www.bullittcenter.org/2012/06/14/composting-toilets-at-the-bullitt-center/J. Devkota, H. Schlachter, C. Anand, R. Phillips, Defne Apul. “Development and application of EEAST: A life cycle based model for use of harvested rainwater and composting toilets in buildings,” Journal of Environmental Management, Volume 130, Pages 397-404, 2013.http://www.sciencedirect.com/science/article/pii/S0301479713006063The composting toilet system book: a practical guide to choosing, planning and maintaining composting toilet systems, a water-saving, pollution-preventing alternative, David del Porto, Carol Steinfeld, 2000, Concord, Mass; Center for Ecological Pollution Prevention; White River Junction, VT. Distributed by Chelsea Green Pub. Co.,http://www.bertschi.org/who-we-are/our-campus/science-wing/ http://inside.warren-wilson.edu/~ELC/New_ELC_Website_/compostingtoilet.php
12. Questions?Questions?