Keywords: solid wastes, electrostatic separation, corona discharge, robustness, experimental design, relative humidity, waste recycling, chopped electric wire, electric wire waste, Taguchi methods
Robust corona-electrostatic separation method for solid waste recycling
The objective was to reduce variation in the outcome of a corona-electrostatic separation process for solid waste recycling by finding operating conditions (high-voltage level, roll speed, splitter position) under which uncontrollable variation in 'noise factors' (ambient humidity, metal content in the feed) has minimal impact on the quantity and the quality of the recovered products. The samples of processed material were prepared from mm-size chopped electric wire wastes. The design and noise factors were first analysed using the classical Taguchi's approach, then combined into one single experimental design, so that a regression model of the process will be fitted.