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Compare Rapid Sand Filter and Slow Sand filter Video Lecture - MBBS

FAQs on Compare Rapid Sand Filter and Slow Sand filter Video Lecture - MBBS

1. What is the difference between a Rapid Sand Filter and a Slow Sand Filter?

Ans. Rapid sand filters and slow sand filters are both used for water filtration, but they differ in their filtration process. Rapid sand filters use a combination of physical and chemical processes to remove impurities from water at a faster rate, while slow sand filters rely primarily on biological processes for filtration and typically operate at a slower rate.

2. How does a Rapid Sand Filter work?

Ans. A rapid sand filter works by passing water through a bed of sand at a high flow rate. The sand bed traps suspended particles and allows water to pass through. In addition to physical filtration, rapid sand filters also use chemical processes like adsorption and coagulation to remove impurities from the water.

3. What are the advantages of using a Slow Sand Filter?

Ans. Slow sand filters offer several advantages in water filtration. They require minimal energy input, as the filtration process is primarily driven by gravity. Slow sand filters also have a longer lifespan compared to rapid sand filters and can effectively remove a wide range of impurities, including bacteria, viruses, and organic matter.

4. How does a Slow Sand Filter function?

Ans. A slow sand filter operates by passing water through a bed of fine sand at a slow rate. As water flows through the sand bed, impurities are physically and biologically filtered out. The top layer of the sand bed, called the schmutzdecke, acts as a biological layer that contains microorganisms responsible for removing pathogens and organic matter from the water.

5. Which type of filter is more commonly used in water treatment plants?

Ans. Rapid sand filters are more commonly used in water treatment plants due to their faster filtration rate and higher capacity. They are efficient in removing suspended solids, turbidity, and certain chemical contaminants. Slow sand filters, on the other hand, are often used in small-scale applications or in areas with lower water demand where the emphasis is on long-term sustainability and natural filtration processes.

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Sep 28, 2025 Last updated

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