NAME OF DEPT: Department of Civil Engineering

Subject Code: 12CE56 Course Title: Water Supply EngineeringTotal No of Hrs: 45 Hours per week: 3Credits: 03PRE REQUISITE: NILL

COURSE OBJECTIVE:

The Course emphasizes on advancement in the water and its quantity required for per capita demand. The complete details about the Impurities in water and their sanitary significance together with respective types of treatment and Water Distribution System will be explained. Student shall also learn the design of each treatment unit to be used in water treatment plant.

1. INTRODUCTION: Human activities and environmental pollution. Water for various beneficial uses and quality requirement. Need for protected water supply.

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2. DEMAND OF WATER: Types of water demands- domestic demand in detail, institutional and commercial, public uses, fire demand. Per capita consumption –factors affecting per capita demand, population forecasting, different methods with merits &demerits- variations in demand of water, peak factors, design periods & factors governing the design periods.

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3. SOURCES , COLLECTION AND CONVEYANCE: Surface and subsurface sources – suitability with regard to quality and quantity. : Intake structures – different types of intakes; factor of selection and location of intakes. Pumps- Necessity, types – power of pumps; factors for the selection of a pump. Pipes – Design of the economical diameter for the rising main; Pipe appurtenances.

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4. QUALITY OF WATER: Objectives of water quality management, water borne diseases. Water quality parameters – Physical, chemical and Microbiological. Sampling of water for examination.. Drinking water standards BIS & WHO guidelines. Health significance of Fluoride, Nitrates and heavy metals like Mercury, Cadmium, Arsenic etc.

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5. WATER TREATMENT PROCESS: Objectives, Treatment flowchart, Aeration, principles, types of aerators.

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6. SEDIMENTATION AND FILTRATION: Theory, settling tanks, types, design. Coagulant aided sedimentation, jar test, chemical feeding, flash mixing, and clari-flocculator. Mechanism – theory of filtration, types of filters, slow sand, rapid sand and pressure filters including construction, operation, cleaning and their design. (Excluding under drainage system back washing of filters). Operational problems in filters.

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7. DISINFECTION AND SOFTENING: Theory of disinfection, types of disinfection, Chlorination, chlorine demand, residual chlorine, use of bleaching powder. Definition of softening, methods of removal of hardness by lime soda process and zeolite process RO & Membrane technique.

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8. DISTRIBUTION: System of supply, service reservoirs and their capacity determination, methods of layout of distribution systems, - Analysis of distribution

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network - Hardy Cross method - Equivalent Pipe method - Layout of water supply pipes in buildings.

COURSE OUTCOME:

At the end of the semester the student shall be able to understand the various methodologies for selection and collection of water source, its treatment and distribution process.

Reference:1. Garg, S.K., Environmental Engineering I, Khanna Publishers, New Delhi.2. Dr.B.C Punmia , Environmental Engineering I & II, Lakshmi Publishers, New Delhi.