Swana sunshine chapt2007beachglass


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Swana sunshine chapt2007beachglass

  1. 1. From Glass to Sand – An Environmental and Economic Win-Win Broward County Beach Demonstration Project Sandy Gutner, Project Manager Phil Bresee, Recycling Program Manager Broward County
  2. 2. Outline Overview of Project Preliminary Results Current Status Next Steps
  3. 3. What is the Beach Demonstration Project? Innovative research project to investigate the feasibility of using recycled glass for beach nourishment on the upland portion of the beach.
  4. 4. What are the Drivers for the Project?   Over 13,000 tons of recycled glass is recovered annually at the County’s MRF with a recycling cost to the County of approx. $150,000.   87% of Broward County’s beaches are critically eroded.   Beach Renourishment projects are very costly, and can take 5 or more years to effect.   Viable sources of replacement sand are becoming scarce.   Having a viable, pre-approved materials available can mitigate the erosion of freshly placed materials.
  5. 5. Early Project Success   Awarded, “Most Innovative Beach Management Project Award” by the Clean Beaches Council, June 2004   Featured in the Sun Sentinel   Featured in a local ABC report and a national Fox news report   First project in US to have conducted this type of in-situ testing
  6. 6. How the project evolved…. Feasibility Mixed Cullet Study Geotechnical Characterization Public Perception Environmental Testing Abiotic Analysis Aquarium Testing Erosion Control Testing Permitting Erosion testing 2002-2004 2005-2006 Presently
  7. 7. Beach Demonstration Project Success Sum of Three Elements Technical Feasibility Environmental Compatibility Public Perception
  8. 8. Project Approach Processing Options Public Perception Geotechnical Characterization Biological Assessment Abiotic Testing Aquarium Testing
  9. 9. Public Perception Two Focus Groups:   Beach Professionals   Tourism Representatives Phone survey   400 County residents Success of public perception activities were critical to overall project success!!! Goal – To perform initial targeted focus groups and public opinion telephone survey
  10. 10. Public Perception Some Common Questions…. “How will it look on the beach?….” – Broward County Resident “Will it cut my feet?” – Broward County Resident “How will it affect the wildlife, especially the seaturtles?” – Beach Professional “Will tourists be able to build sand castles with it?”– Tourism Representative “What will it cost?” – Tourism Representative
  11. 11. Public Perception Concept is Generally Appealing   Most find the concept interesting, appealing, and relevant.
  12. 12. Key Benefits at a Glance   Positive application of using recycled glass to address erosion ranks as most beneficial aspect of sand-glass mixture.
  13. 13. Geotechnical Characterization Conducted analysis on beach sand and glass samples   Grain size distribution   Munsell color   Carbonate content   Grain angularity   Contaminants such as sodium and petroleum Goal - To assess comparatively the geotechnical characteristics between sand and processed glass. Based on the geotechnical and contaminant analysis performed for this study, glass cullet compares closely to natural sand. Sand Cullet
  14. 14. Environmental Testing   Aquarium Testing   Abiotic Testing
  15. 15. Aquarium Testing
  16. 16. Aquarium Testing Biological Monitoring:   Macrofauna Organisms   Microfauna Organisms   Organic Content Goal - To monitor invertebrate survivability and colonization Results indicated that the organism mortality rate was equivalent to natural sand.
  17. 17. Abiotic Testing Conducted analysis on beach sand and glass samples   Temperature retention   Oxygen availability   Gas exchange Goal - To assure the physical environments created by processed glass, will not negatively impact nesting endangered turtles. Based on the abiotic testing performed for this study, glass cullet compares closely to natural sand. Sand Cullet
  18. 18. Abiotic Testing and Construction of Test Plot   Constructed a 40 ft. by 40 ft. by 3 ft. deep test plot   Approx. 190 ft.3 of sand and approx. 115 ft.3 of glass was used in the test plot
  19. 19. Getting the right mix
  20. 20. Fill ‘er up.
  21. 21. Four different blends
  22. 22. Construction
  23. 23. Abiotic Test Results   Testing occurred March 7, 2006 through September 30, 2006. We measured:   Temperature   Humidity   Gas exchange Goal – To determine if glass cullet mixtures exhibit the same abiotic Characteristics when compared to current beach sediments. No significant difference was detected in any of the variables measured.
  24. 24. Preliminary Results   Glass can be processed into a sand-like substance.   Glass cullet has same abiotic characteristics as natural sand. There is not a threat to turtle nesting, hatching success, or of male to female ratio.   Mortality rate in water is the same as for natural sand.
  25. 25. Current Status   Currently in permitting to initiate submersion testing •  Plan to include a one time placement of 2,000 cy of glass cullet below the mean high water line and monitoring.
  26. 26. Next Step - Analyzing economic viability •  Prepare conceptual design •  Review logistics of processing transportation and placement •  Estimate capital and operating costs •  Determine feasibility
  27. 27. Questions?