Low-cost sanitary napkin disposal machine
The napkin-dissolving solution collects in a septic tank and thereby does not pave way for any kind of pollution. The device works under the principle that cotton gets dissolved in a chemical named Cuprammonium Hydroxide [Cu(NH3)4(OH)2] and its non-woven part can be recycled and used for making bags and covers. The cottondissolving chemical solution is passed to the septic tank while the undissolved nonwoven cotton is collected in a waste tray. The used napkin is put through the inlet of the machine, where it is shred to pieces by the AC single-phase induction motor. The shred napkin pieces go to the reaction chamber, where the reaction between the napkin and Cu(NH3)4(OH)2 takes place. The required amount of both chemicals needed for destroying one napkin is delivered into the reaction chamber through a tube, controlled by a solenoid valve.
Link: Low-Cost Method to dissolve nepkins
Problem Scale: Around The world
News Link 5: