Meet the Compact Rotating Aerobic Pollution Prevention Excreta Reducer. We call it the CRAPPER.
Join the toilet revolution!
In the 1860s, Thomas Crapper revolutionized sanitation in the developed world by promoting flush toilets. Our aim is to accomplish a new kind of toilet revolution—only this one is aimed at countries like Haiti and El Salvador. And we think the CRAPPER is the key.
The CRAPPER’s story begins in the mountains of El Salvador in the spring of 2012, when a group of volunteers from New York set out to build some latrines. When the materials couldn’t be delivered because the roads washed out, they got creative with what was available, and the result was the original CRAPPER.
Many design tweaks later, we think we’ve landed on something pretty great: A good looking, privately owned, indoor composting toilet that costs under $200 per unit.
Our innovative design allows people in developing countries to enjoy the close-to-home convenience that Westerners take for granted.
HERE’S HOW IT WORKS:
Our design starts with a composting barrel that spins, much like a garden composter. When the drum spins, the waste is aerated, which is needed for the micro-organisms that eat the waste and make the compost – they need air to breathe just like us! The user just needs to add dry cover material after they use the toilet. The cover material can be dry leaves or saw dust or peanut husks, whatever is most easily available in the community. The composting process reduces the volume of waste by 80%, reduces odor and the presence dangerous pathogens.
When the drum gets full—it takes about 3 months—it’s time to empty some compost out. The drum is spun with the waste door open so some of the waste falls out into a bucket underneath. The compost is left in the bucket for 3 months until the next time the drum needs to be emptied out. At this point the compost is finished and can be safely buried outside also with wood ash as a disinfectant.
The addition of wood ash when burying the compost is an extra precaution to disinfect any remaining pathogens in the waste. Many families in developing countries cook with wood or charcoal and therefore have easy access to ash. Then the last step is just to cover the hole over with dirt. Wood or charcoal ash naturally has a high pH which creates a caustic environment which kills the pathogens that were formerly used to living in our acidic gut.
This innovative three-step treatment process, which employs biological (aerobic composting in the drum), physical (drying out the compost in the drop down chamber) and chemical (burying the compost with caustic ash) processes, turns disease-causing, pathogen-rich human poop into a safe waste product that can be disposed of without impacting the environment or causing disease.
PILLARS OF CRAPPER DESIGN
1. Optimized Low-Cost Composting Toilet Design
The CRAPPER is a self contained, horizontally mounted, rotatable bio-drum based compost toilet. This design maximizes aerobic degradation to dramatically reduce waste volumes and is odorless thanks to ventilation. The drum housing is designed to allow for safe, sanitary and easy access for the removal of excess compost when the chamber becomes full.
2. Conveniently Located Close to the Home
These private composting toilets will be located near the family’s home providing for safe access for all family members and friends.
3. Aesthetically Pleasing:
The toilets come with recommendations regarding where to optimally locate the compost toilet to maximize light and ventilation.
4. Private Ownership Leads to Proper Maintenance
Pubic toilets often fail to remain clean and functional without someone in charge to take responsibility for upkeep. For this reason we recommend our toilets be purchased by families and privately owned. Routine maintenance of the toilets involves spinning the toilet 3 times weekly and emptying it out once every 3 months. These tasks are easy and straightforward but there needs to be a designated person to take care of it like anything else. CRAPPERs can also be installed in churches, schools and other institutions with designated maintenance staff to take up these responsibilities.
Peace Corps Style Simple Hand Washing Station – a TfP favorite!