Leaving sludge in heaps allows excess water to drain out, reducing its weight and volume. This makes transportation cheaper and easier, while letting it partially decompose improves safety and reduces handling risks.
Usually, when sludge is removed from drains, it is left in heaps next to the drain for 3–4 days. Afterward, it is transported to a garden or a field where it can be used as manure. This approach reduces transportation cost of the sludge and enhances the safety of individuals handling it. Reflect upon it and explain how.
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Sludge is left in heaps near drains to allow excess water to drain away, which reduces its weight and volume. This makes it more cost-effective and efficient to transport. Additionally, letting the sludge sit for a few days helps it partially decompose, making it safer to handle and use as manure. This approach lowers transportation costs and enhances safety by reducing the risk of handling wet, heavy sludge and allowing for easier processing.
For more CBSE Class 6 Science Curiosity Chapter 8 A Journey through States of Water Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions-class-6-science-curiosity-chapter-8/