Public Health Engineering

Public health engineering

Total contact hours 160

Aims

Understand the construction and maintenance of sewer , process of collection conveyance and disposal of sewage

Course contents

Introduction

·        Definition and terminology of sanitary engineering

·        System of sewage disposal

·        Cesspool drainage, conservancy system and water carriage system their comparison

Quantity of sewage

·        Quantity of discharge in sewer ,dry weather flow ,variation in quantity of dry whether flow

·        Quantity of storm water flow-runoff co-efficient ,time of concentration impressivious  factor, hudralic formula for velocity of flow

House drainage

·        Requirement

·        Shapes and construction of different type of drain

·        House drain slope and connection with main sewer

·        One and two pipe system of drainage and their compression

Sewer design

·        Section of sewers and their suitability standard practices for design of sewer

·        Self cleaning velocity and non silting-non scouring velocity

·        Numerical problems

Alignment and layout

·        General layout of sewers

·        Location of sewer ling-(longitudinal and x -section showing sewer lines)

·        Shapes of sewer and their suitability (gradient fixing bedding handling lowering

·        Laying jointing ) testing and back filling

·        Setting out alignment

Sewer Appurtenance

·        Brief description location function  and construction of man holes, drop-man holes ,catch basin, Inlets, clean out, lamp holes, flushing tanks regulators ,grease and oil traps inverted syphon , trestle and pier.

Ventilation of sewer

·        Introduction

·        Methods of ventilation

·        Vents and venting (single and two pipe system circuit venting local vests ,distance of vents connection)

Pumping sewage

·        Necessity of pumping sewage

·        Requirement of pumping sewage

·        Types of sewage to be pumping

Composition of sewer

·        Mineral matter inorganic matters

·        Organic matters

·        Categories of micro organisms /biological matters (milden  ,algae ,fungi protozoa ,germs aerobic and non aerobic  bacteria ,facultative bacteria enzymes their types and sources

·        An aerobic /aerobic decomposition

Properties of sewage

·        Physical properties

·        Chemical properties

·        Biological properties

·        Sampling sewage

Test of sewage

·        Physical test

·        Chemical test (chlorine fats, grease and oil, nitrogen oxygen ,ph, value and total solid)

Biological oxygen demand

·        Measuring and definition of B.O.D

·        Test for B.O.D

·        Importance and limitation of

·        Relative stability B.O.D

·        Numerical problems of B.O.D

Biochemistry

·        Portion carbo-hydrate and standard solution

·        Acidity and sewer and notation of acidity

·        Chemical coagulation

Sewage treatment and disposal

·        Preliminary treatment

·        Berife  description and function of following units screen skimming tanks grit chamber plain sedimentation tanks

·        Simple problems on the design of sedimentation tanks

·        Secondary treatment  description of intermittent filler ,contact beds trickling filters activated sludge process sludge digestion , sludge drying sludge disposal

·        Misc, treatment septic tanks imhoff tanks

·        Sewage disposal dilution disposal on lands, oxidiation pond, oxidation ditch aerated lagoon anacrobic lagoons

Solid waste disposal

·        Method of disposal – un controlled dumping ,tipping /sanitary land till incineration composting