P13411: High Temperature Waste Pasteurizer

1. P13411:High Temperature Waste Pasteurizer Kyle Weston – Team Lead Eng. Kyle Cohn – Lead Structural Eng. Brian Kilger – Lead Manufacturing Eng. Stephanie Mauro – Lead Thermal Eng.

2. Agenda • Project Description • Customer Needs • Engineering Specifications • Concept Summary • System Architecture • Design Summary • Prototype Design • Ideal Design • Cost Analysis • Results of Testing • Project Evaluation • Suggestions for Improvement

3. Project Description • To design an inexpensive waste pasteurizer to transform waste into a safe to use fertilizer using renewable energy and materials available in Haiti. • Customer Needs:

4. Time to Pasteurize

5. Engineering Specs

6. Concept Selection • Datums • Capetown Project (left) • Cookit (right) • 3 Concepts with highest scores from Pugh Chart • Combined features from the top 3 concept into one design

7. Systems Architecture

8. Design Summary: Assembly

9. Design Summary: iPooP • Indicator of Pasteurization of our Poop Push Rod Spring Chamber Spring Divider Piece Wax Chamber Wax

10. Cost Analysis • Total cost of Prototype: $209.11 • Some parts needed to be purchased in large lot sizes • Some parts were donated by the MSD department • Total cost of mass produced unit: $63.47 • Includes all necessary parts in price (Customers provide no extra materials) • Plenty of opportunities exist to reduce price

11. Results: Heat Test • Temperature inside inner pot reached 65.5 C for 1 hour • iPooP successfully indicated pasteurization • Handle did not stay below 49 C

12. Results: Wind Test • Preliminary testing resulted in design change of permanently securing reflectors in place • Showed no signs of degradation or tipping while experiencing 20 mph winds • Could not be tested at 25mph wind speeds

13. Results: Additional Tests • Leak Test: No water leaked from inner bucket to outer bucket • Load Test: 5 subjects were each able to load and unload the pasteurizer in under 1 minute • Volume Test: Pasteurizer held minimum requirement of 3L of water • Durability Test: Pasteurizer withstood strong kick • Wax Melting Temperature Test: Selected wax used in iPooP has a melting temperature of 58.8 °C

14. Evaluation • Successful accomplishments: • Re-usable pasteurizer • Does not need potable water • Pasteurizes waste in 2.5 hours based on iPooP • Most components can be replaced or repaired in Haiti • Potential Improvements • Handle of pot reaches too high of a temperature and would need to be allowed time to cool before handling • Wax in iPooP melts at a temperature below the ideal pasteurization temperature • iPooP can not be easily replaced in Haiti

15. Lessons Learned • Should have considered handle temp requirement when purchasing pot • Should have ordered wax and tested melting temperatures earlier • Should have allotted more time for testing • Should have acquired materials from what was available as extra and from the machine shop

16. Suggestions for Improvement • Testing in Rochester in Spring/Summer • Testing in Haiti (actual environment) • Use of cheaper materials or materials more readily available in Haiti • Possibility of using in conjunction with Portable Multi Use Shelter (P13414) • Possibility of using in conjunction with Bloom Box Solid Oxide Fuel Cell, which is powered by biomass: http://www.greentechmedia.com/articles/read/a-bloom-box-for-your-pocket

17. Acknowledgements • Guide: John Kaemmerlen • Customer: Sarah Brownell • Machine Shop • Brian Thorn • Carl Lundgren • John Wellin Thank You for your Support and Guidance