Bicycle-Powered Water Pump and Purifier Tom Gomes Rebecca de Sa EN100 - Spring 2008 Tom Gomes Rebecca de Sa EN100 - Spring 2008

Overview + Goals  To pump water from reservoir into holding tanks, filter, then pump into clean dispensing tank  Filtration will involve:  a UV light for biological contaminants  a mechanical particulate filter  Make an apparatus that can be easily attached to most bicycles with minimal modification  Use readily available materials and parts  Family scale: provides enough water for cooking, cleaning, and drinking  Simple, graphical installation instructions  To pump water from reservoir into holding tanks, filter, then pump into clean dispensing tank  Filtration will involve:  a UV light for biological contaminants  a mechanical particulate filter  Make an apparatus that can be easily attached to most bicycles with minimal modification  Use readily available materials and parts  Family scale: provides enough water for cooking, cleaning, and drinking  Simple, graphical installation instructions

What exists?  MayaPedal Bicycle Water Pump  Pros: community scale (5-10 gall/min)  Cons: stationary, no filtration  LifeStraw  Pros: compact, inexpensive  Cons: personal scale  Innovate or Die Aquaduct  Pros: family scale, mobile  Cons: expensive, integrated unit with proprietary parts   MayaPedal Bicycle Water Pump  Pros: community scale (5-10 gall/min)  Cons: stationary, no filtration  LifeStraw  Pros: compact, inexpensive  Cons: personal scale  Innovate or Die Aquaduct  Pros: family scale, mobile  Cons: expensive, integrated unit with proprietary parts 

What to Improve?  Filtration quality  Include biological (UV sterilization) and particle filtration  Accessibility of apparatus (reuse and retrofitting)  Goal: Low-cost, low-complexity (installation and use)  Simply repaired and maintained (readily available or recycled materials)  Versatility of design: add-on vs. complete proprietary system  Filtration quality  Include biological (UV sterilization) and particle filtration  Accessibility of apparatus (reuse and retrofitting)  Goal: Low-cost, low-complexity (installation and use)  Simply repaired and maintained (readily available or recycled materials)  Versatility of design: add-on vs. complete proprietary system

Design Ideas + Questions  System Mounting  Stationary Support  Filtration  Biological  Particle  Power Take-off  Tire friction-driven or chain-driven?  Need to power UV light (generator) + pumping system (mechanical)  Clutch/Switch  System Mounting  Stationary Support  Filtration  Biological  Particle  Power Take-off  Tire friction-driven or chain-driven?  Need to power UV light (generator) + pumping system (mechanical)  Clutch/Switch