Wastewater Story

Given below is a jumbled sequence of the processes involved in
a wastewater treatment plant. Arrange them in their correct
sequence.
(a) Sludge is scraped out and skimmer removes the floating
grease.
(b) Water is made to settle in a large tank with a slope in the
middle.
(c) Large objects like plastic bags are removed by passing
wastewater through bar screens.
(d) Sand, grit and pebbles are made to settle by decreasing
the speed of incoming wastewater.
(e) Wastewater enters a grit and sand removal tank