Given below is a jumbled sequence of the processes involved in a wastewater treatment plant Arrange ...

Question

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.

Accepted Answer

c Large objects like plastic bags are removed by passing wastewater through bar screens e Wastewater enters a grit and sand removal tank d Sand grit and pebbles are made to settle by decreasing the speed of incoming wastewater b Water is made to settle in a large tank with a slope in the middle a Sludge is scraped out and skimmer removes the floating grease

NCERT Exemplar Solutions Class 7 Science Solutions for Wastewater Story - Exercise in Chapter 18 - Wastewater Story