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Project Summary

Project Information

Three fourths of all people in Haiti lack access to a safe toilet, contributing to frequent diarrheal illness, devastating cholera outbreaks and high childhood mortality. The sustainable sanitation organization Sustainable Organic Integrated Livelihoods (SOIL) currently provides low cost sanitation to slum neighborhoods in Haiti by collecting feces from urine diverting toilets in buckets and composting it into organic fertilizer. One issue with their current system is that each bucket must be cleaned with a power washer before it can be re-used, leading to a lot of water use and wastewater that needs to be treated before disposal. The goal of this project is to develop a compostable bucket liner using local agricultural or cardboard/paper waste products (and a system for making it) that will facilitate bucket cleaning and save water.

SOIL’s ecological toilets separate urine and feces into different containers (figure 1). The urine falls into a jug and is managed by the user. The feces are collected in a standard 5 gallon bucket and are covered after each use with a dry organic powder made from sugar cane bagasse and peanut shells called “bonzode” or “good odor”.

 

 

Figure 1: A SOIL toilet and a schematic of a slightly revised design from MSD team P19414

The bucket is picked up weekly or twice a week, covered, and taken to a compost site. At the site, the contents are manually emptied onto a compost pile which is then covered with more bonzode (figure 2). The buckets are then taken to a washing station where they are power washed and dipped in an antiseptic solution. The wash water is collected into a septic system.

 

 

Figure 2: Collection and dumping

These toilets already save a lot of water because they do not require flushing, but the process for cleaning the buckets and returning them to users is still somewhat water intensive. SOIL has measured it at about 34 gallons per bucket, which represents about 187 toilet uses. SOIL serves 1100 households. If these houses had flush toilets instead of ecological toilets, they would use an additional 21 million gallons of water (see https://www.oursoil.org/water/).

Still, SOIL would like to minimize its water use even further. One idea for facilitating cleaning is lining the buckets with a compostable liner so that the contents can slip cleanly and easily onto the compost pile without leaving residues that need to be sprayed off. Various agricultural, food processing, and industrial wastes such as sugar cane bagasse, peanut shells, shredded cardboard, rice hulls, etc. could potentially be used to develop a liner. Local food waste composting companies may also have interest in these liners.

Your team is tasked with developing the liner and designing a manufacturing system to make it. 


Project Title: SOIL Compostable Bucket Liners

Project Number: P20415

Project Family: Sustainable Organic Integrated Livelihoods (SOIL)

Start Term: Fall 2019

End Term: Spring 2020

Faculty Guide: Terry Wright

Primary Customer(s): Sarah Brownell

Sponsor (financial support): SOIL

Team Members

 


MemberMajorRoleContact
Morgan MistysynISEE

Project Manager, Communicator

email
Thomas AnastasioISEE

Project Manager, Purchasing, Assistant Confluencer

email
Matthew GoetchiusMECE

Lead Process Engineer, Facilitator, Haiti SME

email
Sean MahaneyMECE

Lead Product Engineer, Lead Confluencer

email

Hannah Tennis

BME

Facilitator, Note Taker, Lead Trelloer, Materials SME

email
Terry WrightN/AGuideemail
Sarah BrownellN/AFaculty Advisor / Customeremail


Information

Work Breakdown: By Phase

Work Breakdown: By Topic

Project Management

Design Tools

Design Documentation

Implementation

Validation

Presentation & Dissemination

PRP

Cost Analysis

Risk Management

Problem Management

Use Cases

Benchmarking

Functional Decomposition

Morphological Chart

Pugh Concept Selection

BOM

Mechanical Drawings

Software Diagrams

Facility Layout Manuals

Mockups

Test Fixtures

Prototyping

Test Plans

Analysis Results

Simulations

Test Results

Design Review Documents

Technical Paper

Poster

Imagine RIT Exhibit

Acknowledgements

  • Guide: Terry Wright
  • Customer: Sarah Brownell
  • Sponsor: Sustainable Organic Integrated Livelihoods (SOIL)
  • Subject Matter Experts: RIT Packaging Department

References: APA

Compostable Bag Used in Testing. Retrieved from https://www.amazon.com/Biodegradable-Recycling-Degradable-Compostable-Wastebasket/dp/B07KS8VFQL

Composting. (n.d.). Retrieved from https://www.bpiworld.org/Composting

Helmenstine, Anne Marie, Ph.D. (2020, February 11). The Definition of Hydrophobic With Examples. Retrieved from https://www.thoughtco.com/definition-of-hydrophobic-605228

Painter, Sally. (2006/2020) Benefits of Using Biodegradable Plates. Retrieved from https://greenliving.lovetoknow.com/Benefits_of_Using_Biodegradable_Plates

Woodford, Chris. (2008/2018) Bioplastics. Retrieved from https://www.explainthatstuff.com/bioplastics.html.



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