Q. 24.1( 53 Votes )
What is sewage? Explain why it is harmful to discharge untreated sewage into rivers or seas.
Sewage is the waste-water which contains both solid and liquid wastes released by homes, industries, hospitals, offices, and other users.
It also includes rainwater that has run down the streets during a storm or heavy rain.
Sewage contains various contaminants including disease-causing microbes.
If untreated sewage is discharged into rivers or seas, then the water in the rivers or seas would also get contaminated and it would be harmful to aquatic animals and plants.
That is why; it is harmful to discharge untreated sewage into rivers or seas.
Rate this question :
What are the different types of inorganic and organic impurities generally present in sewage?NCERT - Exemplar Science
What is sewage? Explain why it is harmful to discharge untreated sewage into rivers or seas.NCERT Science
Fill in the blanks:
a. Cleaning of water is process of removing_____.
b. Wastewater released by houses is called_____.
c. Dried _______ is used as manure.
d. Drains get blocked by ______ and _______.NCERT Science
Name two alternative arrangements for sewage disposal where there is no sewerage system.NCERT - Exemplar Science
Animal waste, oil and urea are some of the organic impurities present in sewage. Name two more organic impurities present in sewage.NCERT - Exemplar Science
Name two inorganic impurities present in sewage.NCERT - Exemplar Science
Sewage is mainly aNCERT - Exemplar Science
The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known asNCERT - Exemplar Science
Which of the following is a part of inorganic impurities of the sewage?NCERT - Exemplar Science
State whether the following statements are True or False. In case a statement is false, write the correct statement.
(a) Sewage is a solid waste which causes water pollution and soil pollution.
(b) Used water is wastewater.
(c) Wastewater could be reused.
(d) Where underground sewerage systems and refuse disposal systems are not available, the high-cost on-site sanitation system can be adopted.NCERT - Exemplar Science