Biology Waste Water Story Part 8 (Sewage harming aquatic life) Class 7 VII | Summary and Q&A

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January 14, 2016
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Biology Waste Water Story Part 8 (Sewage harming aquatic life) Class 7 VII

TL;DR

Directly disposing sewage into water bodies can harm aquatic life by degrading oxygen levels and causing pollution.

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Questions & Answers

Q: How does directly disposing sewage into water bodies harm aquatic life?

Directly disposing sewage into water bodies can harm aquatic life by degrading oxygen levels and leading to the death of plants, animals, and fish due to the lack of oxygen.

Q: What is the role of microbes in wastewater treatment?

Microbes in wastewater treatment plants consume the organic impurities in sewage, but they also use up the dissolved oxygen in the water, which is vital for aquatic plants and animals.

Q: How can we manage wastewater better as individuals?

We can manage wastewater better as individuals by ensuring that drains are covered, not throwing solid wastes into sinks, and avoiding the disposal of oil, chemicals, pesticides, and medicines into sinks.

Q: What are the disadvantages of throwing solid waste and oil into sinks?

Throwing solid waste and oil into sinks can cause blockages in pipes, leading to the inefficient transportation of sewage to treatment plants. Oil can also block soil pores, reducing the effective filtering of water through soil.

Summary & Key Takeaways

  • Disposing sewage directly into water bodies without treatment can harm aquatic life by depleting oxygen levels and causing bio degradation of organic matter.

  • Microbes in the water consume the organic impurities in sewage, but they also consume the dissolved oxygen, leaving little for aquatic plants and animals.

  • Lack of oxygen leads to the gradual death of aquatic life, making it crucial to never dispose of sewage directly into water bodies.

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