Abstract:
The aim of integrating lean manufacturing and parameter design is to minimize seven non-value wastes
in addition to the traditional waste in clean water production. These additional wastes to be considered
are overproduction, waiting, motion, transportation, inventory, overprocessing, and defects.
Information obtained from each waste is the input for the parameter design of the mixing process. The
result of interaction between these seven types of waste in the lean production of clean water reveals
that overprocessing waste is the most influential input in the parameter design of the Taguchi method.
In the process of adding the level of concentration of poly aluminium chloride coagulant in the mixing
process, a turbidity level below 5 nephelometric turbidity units is obtained, which in fact is in
accordance with the health standard for clean water. An observation was also made on the behavior of
flocs as the effect of Brownian motion due to the attractive force of poly aluminium chloride coagulant
and colloid particle. The particle was then examined using a scanning electron microscope to find out
the dimension of grainsized flocs as the result of sedimentation in the mixing process. By properly
integrating lean manufacturing and parameter design to minimize waste, a quality water meeting the
set standard would be produced.
Keywords: Waste, Integration, Mixing, Flocs, Clean Water
