Sustainable Composting Toilet Design: Project Update

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Sustainable Composting Toilet DesignProject
Update

• College dEnseignment Generale,
• Azové, Benin

December 8, 2004 Gonzaga University Center for
Engineering Design Project CE-7 Kevin Boger,
Katie Hall, Tyler Jantzen, Katherine
Rowden Faculty Advisor Dr. Bradley
Striebig Professional Liaison Allison Esvelt
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Composting Toilet Design

• Background
• Objectives
• Updated Schedule Budget
• Accomplishments
• Current Status
• Future Direction Goals
• Benefits
• Summary

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Background

• Collaborative project with CE-5, CEG, Azové, and
  Engineers Without Borders
• Disease related to pathogens is a problem
• The World Health Organization has shown
  composting toilets to be effective in reducing
  the spread of disease and pathogens

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Objectives

• Design a composting facility for collecting and
  treating solid and liquid human wastes
• Demonstrate through scientific tests the
  efficiency of this design in removing pathogens
• Reduce exposure and subsequent illness due to
  intestinal parasites and disease
• Make the design a sustainable solution

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Updated Schedule
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Updated Budget
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Accomplishments

• Completed Research
• Completed Preliminary Design (Prototype A)
• Built Prototype A
• Secondary Design (Prototype B) 50 Complete
• Parts for Prototype B Ordered
• Site Visit

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Site Visit
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Site Visit
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Current Status

• Prototype A Filled
• Testing Begun
• LT/MUG, A1 Medium Broth and Pathoscreen
• Daily Prototype Monitoring
• Odor
• Leachate
• 4 Temperature Readings Recorded 3x per day

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Prototype
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Filling the Prototype
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Filling the Prototype
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Filling the Prototype
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Testing
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Testing- 24 Hours Later
LT/MUG for E-coli
A1 Medium
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Testing Pathoscreen
24 Hours
48 Hours
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Temperature Log
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Future Direction

• Continue Testing on Current Prototype
• Finalize the plan for a second prototype
• The second Prototype will be able to be taken
  apart and reassembled along with more permanent
  design solutions

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Future Goals

• Meet WHOs guidelines for bacteria and worm
  reduction MPN reduction of 4 log units
• Meet US guidelines for pathogen reduction
  maintain 40ºC (104º F) for 5 days in barrels

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Benefits

• Communication skills
• Creating and manufacturing prototype
• Experience in lab testing
• Expanded knowledge of the world, perspective
• Bringing many components together to make a
  finished product

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Summary

• Develop a sustainable composting toilet design
• Test the efficiency of this design
• Reduce occurrence of disease spread through
  parasites

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Questions?