Project Description
Through MIT D-Lab, we connected with Betty Ikalany, who founded Appropriate Energy Saving Technologies, Limited. Her company produces charcoal briquettes for use in cook stoves, which provides a cleaner cooking alternative to three stone fires. Briquettes are formed by first burning natural agricultural waste to create an ash, which is then mixed with a binder. This mixture is pushed through an extruder to create cylindrical, chimney-like briquettes. This process induces a lot of stress on the extruder screw, which breaks very easily. EWB developed a case hardening treatment, that when applied to the extruder screw, greatly extends its lifetime.
