PUBLIC HEALTH ENGG SEMESTER 4 TH SYLLABUS WATER

PUBLIC HEALTH ENGG. SEMESTER: -4 TH

SYLLABUS WATER SUPPLY INTRODUCTION… QUANTITY OF WATER… QUALITY OF WATER… WATER TREATMENT… CONVEYANCE OF WATER… LAYING OUT PIPES… BUILDING WATER SUPPLY… WASTE WATER ENGG INTRODUCTION… SEWERAGE SYSTEM… LAYING AND CONSTRUCTION OF SEWER… SEWAGE CHARACTERSTICS… NATURAL METHOD OF SEWAGE DISPOSAL… SEWAGE TREATMENT… BUILDING DRAINAGE…

1. introduction HYDROGEN CYCLE

2. QUANTITY OF WATER DOMESTIC WATER DEMAND COMMERCIAL WATER DEMAND INDUSTRIAL DEMAND FIRE DEMAND LOSES AND WASTE DEMAND FOE PUBLIC USE

Domestic use…

Public utility

For various purposes. .

Per capita demand The total yearly consumption of water of a water supply Scheme divided by the population of that area and the num Of days in a year… Per capita demand = total consumption of water Population * 365

3. Quality of water

Importance of testing Water quality testing is important because it identiﬁes contaminants and prevents water-borne diseases. Necessity……. 1. Controlling operation 2. Purity determination 3. Amount of impurities 4. Type of impurities 5. Quality determination 6. Deciding various puriﬁcation stages

METHODS…. Physical test… Temperature test Color test Turbidity test Odour test Speciﬁc conductivity test Chemical test… Total solid test Chloride test Chlorine test Lead test Arsenic test Ph value test Fluorine test Iron and manganese test Copper test Dissolved gases test Calcium and sodium test

4. Water treatment

Steps. Screening Plain sedimentation Sedimentation with coagulation Filtration Disinfection Aeration 1. Screening A protective device provided To Exclude large size particle Is called screening… Types. . 1. Coarse screening 2. Fine screening

. Sedimentation The process by which suspended particles Removed form water under effect of Gravity Called sedimentation. Types. . Plain sedimentation. Sedimentation with co-agulation

Chlorination is one of many methods that can be used to disinfect water. This method was ﬁrst used over a century ago, and is still used today. It is a chemical disinfection method that uses various types of chlorine or chlorinecontaining substances for the oxidation and disinfection of what will be the potable water source

5. Conveyance of water The pipes of different material are used in conveyance of w Some of them are…. . o. Copper lead pipe o. Cast iron pipe o. Galvanized pipe o. Steel pipe o. P. V. C. Pipes o. Asbestos cement pipe o. Concrete pipe Copper pipe

Joints in pipe. . 1. Socket joint 2. Flanged joint

3. Expansion joint 4. Screwed joint

Layout of water distribution

6. Laying of pipes There are nine steps of laying out pipes 1)General planning of area 2)Setting out alignment 3)Excavation of trench 4)Bedding of trench 5)Lowering of pipes 6)Laying of pipes 7)Jointing of pipes 8)Testing of pipe lines 9)Back ﬁlling Excavation of trench

Bedding of trench

7. Building water supply The different types of fittings used in a building for installing water Supply plumbing are called as water supply fixtures. Various type of fixtures are… Ferrule Goose neck Stop cock Service pipe Bib cock Stop tap Storage tank Goose neck Bib cock

Bends in pipes

Part : -2 Waster water Engineering

8. Introduction to sanitation The used water or anything else like solid or semi solid whicjh is throw Finally in one form to the other is called waste……. Classiﬁcation … Dry waste Semi solid or semi liquid Liquid waste In our research, we’ve come up with ﬁve frequently mentioned sanitation tips to prevent foodborne illnesses in food service and retail businesses. They are: Proper personal hygiene, including frequent hand arm washing and covering cuts; Proper cleaning and sanitizing of all food contact surfaces and utensils; Proper cleaning and sanitizing of food equipment; Good basic housekeeping and maintenance; and Food storage for the proper time and at safe temperatures.

Difference between water conservancy and water carriage system

9. Sewerage system Sewers are the underground pipes which are used for carrying the sewage To the disposal point outside the town…. . Classiﬁcation of sewerage. . Separate system Combined system Partially separate system The pipes are made with diff material. . Cast iron Concrete sewers Stone ware Asbestos cement Masonry Plastic Underground Sewerage pipes

Different shape sewers

10. Laying and Cons. Of Sewer Stages of construction and laying of sewers Setting out alignment of sewer Excavation of trench Setting the gradient preparation of bedding Handling of sewer Testing of sewer Backﬁlling of trench Excavation of trench

Procedure….

11. Sewarage characteristics Composition of sewage… Floating matter like wrappers, match sticks, leaf etc. Mineral matter like sand, gravels, dust etc. Vegetable and animal matter like hydrocarbon, oil, fatty acid etc. Gases like ammonia hydrogen sulphide, methane etc. Biological life like bacteria Bacteria in sewage Floating matter

Analysis of sewage Physical analysis… Turbidity test Odour test Temperature test Color test Chemical analysis… Solids Dissolved oxygen Bio-chemical oxygen demand Chemical oxygen demand Nitrogen Chloride and sulphide Chlorine test Ph-value test Oil and grease