Chapter 4 of 12
Revision Notes
Water Purification and Sewage (Wastewater) Management — Revision Notes
Maharashtra Board · Class 10 · Water Security
Water Purification and Sewage (Wastewater) Management revision notes for Maharashtra Board Class 10 Water Security: 4 topics in quick points.
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Key Topics to Revise
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1. Turbidity of Water and Its Measurement
- Turbidity of water is the reduction in clarity, transparency, and quality of water due to suspended soil and soluble substances.
- It is misconception that turbid rainwater is waste.
- Turbid water can be kept stagnant for some time, or the right amount of alum can be added to reduce turbidity.
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2. Stages of Water Purification
- The stages of water purification are pumping, air mixing, coagulation, flocculation, sedimentation, sand filtration, and disinfection.
- Pumping brings water from the source to the purification plant.
- Wire mesh is installed at the pumping stage to prevent fishes and small plants from coming out of the tap while pumping.
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3. Disinfection Agents
- Chlorine is a common disinfecting gas used to kill germs in water.
- Chlorine is convenient and safe to mix in water.
- Chlorine kills germs by forming hypochlorus acid.
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4. Domestic Water Purification Devices
- UV water purifier uses three-stage filtration.
- In the first stage, activated carbon removes dust, fine sand, or waste material.
- Nano silver coated carbon filters remove unwanted taste and odour.
Get complete notes with diagrams and examples
Full NotesKey Concepts
Turbidity is the reduction inA circular disc painted whiteA Nephelometer measures turbidity of waterWater is pumped from the sourceCoagulants settle suspended particles
Frequently Asked Questions
What are the important topics in Water Purification and Sewage (Wastewater) Management for Maharashtra Board Class 10 Water Security?
Key topics in Water Purification and Sewage (Wastewater) Management include Turbidity of Water and Its Measurement, Stages of Water Purification, Disinfection Agents, Domestic Water Purification Devices. Study these first, then practise questions on each for the Maharashtra Board Class 10 board exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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