|Seminar presentation video.|
An example of our innovation process is illustrated below. I learned about molding PVC while on assignment in the Salvadoran refugee camp at Colomoncagua, Honduras in 1983. I observed Hondurans fixing a water transmission line by making an improvised pipe coupling out of a piece of pipe by heating the pipe over a fire of corn husks. We brought that idea to Cornell to create the diffuser pipes that are essential for the creation of a floc blanket in the AguaClara sedimentation tanks. Cornell students improved the technology and developed the idea of using hot vegetable oil to carefully heat the PVC to a temperature where it can be molded easily. Tim Brock and Paul Charles helped design and fabricate molds in the Civil and Environmental Engineering machine shop. We delivered those molds to Agua Para el Pueblo in Honduras. Below you can see an aluminum mold that is used to decrease the diameter of the end of pipe for insertion into the manifold. The worker in the center of the photo is using the wedge mold to create a rectangular slot.
|Operator candidates form pipes heated with hot vegetable oil using aluminum molds. The pipes serve to direct the jets of water that enter the sedimentat|
The operator candidates assemble
the inlet manifolds for the sedimentat