Wastewater released by houses is called ____________.
Sewage:
Hence, Wastewater released by houses is called sewage.
Fill in the blanks:
(a) Cleaning of water is a process of removing _______.
(b) Wastewater released by houses is called ________.
(c) Dried _______ is used as manure.
(d) Drains get blocked by ________ and ________.
Question 20
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 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.
Question 21
Three statements are provided here which define the terms, i.e. sludge, sewage and wastewater. Pick out the correct definition for each of these terms. (a) The settled solids that are removed in wastewater treatment with a scraper. (b) Water from kitchen used for washing dishes. (c) Wastewater released from homes, industries, hospitals and other public buildings.
Wastewater released by houses is called ___