INDIAN INSTITUTE OF TECHNOLOGY ROORKEE
NAME OF DEPTT./CENTRE: Department of Civil Engineering
1. Subject Code: CEN-202 Course Title: Waste Water Engineering
2. Contact Hours: L: 3 T: 1 P: 2/2
3. Examination Duration (Hrs.):
4. Relative Weight: CWS: 20
5. Credits: 4 6. Semester: Spring 7. Subject Area: DCC
8. Pre-requisite: Nil
9. Objective: To impart basic knowledge of waste water collection, characterization, treatment and safe
disposal practices.
10. Details of Course:
Introduction: An overview of the subject: Domestic and industrial usage of
water, generation of contaminated water, its environmental effects, scope of the
subject, relationship with civil engineering, conventional objectives and newer
challenges in wastewater engineering; Introduction to Wastewater Treatment:
Over view of wastewater treatment, different categories of treatment provided –
preliminary, primary, secondary, tertiary, sludge handling and disposal, general
principles for wastewater treatment, objectives and goals for different trains/ units
of wastewater treatment process
Wastewater Characterization: Physical, chemical and biological
characterization. Suspended, dissolved and volatile solids, biodegradability of the
organics, BOD and its concepts, measurement procedures, CBOD and NBOD,
kinetics, COD, ThOD, TOC, Total and Kjeldahl nitrogen, Phosphate,
measurement procedures, sources of microbes and pathogens in wastewater,
concept of indicator organism, method of determination of indicator organism,
quantification methods- Thomas equation, Poisson’s distribution.
Wastewater Collection: Generation and estimation of community Sewage, flow
variations, storm water flow, estimation of storm-water flow in urban and semi-
urban setup - Rational formula, time of concentration, time of entry, time of flow,
types of sewers, design considerations, open channel flow- Manning’s formula,
design of sewer lines, sewer network design principles, alternate systems for
sewage collection and conveyance- small bore system, shallow sewer systems,
sewer appurtenances- different types of manholes and their constructions,
functions, weirs as controlling devices, street inlets, gully traps, siphons, oil and
grease traps, outfall structures, design considerations, different types of sections
for hydraulically equivalent sections, design of hydraulically
equivalent sections.
Fundamental concept of reactors: Mass balance relationships, analysis and
descriptions of reactors- batch, completely mixed flow a and plug flow, examples
from natural and engineered processes
Preliminary and Primary Treatment : Bar screens, grit chambers, oil and
grease removal, primary sedimentation tank – circular and rectangular types,
sizing, inlet and outlet arrangements, design of collection launders; Low-cost and
On-site Treatment processes: Waste stabilization ponds- aerobic, anaerobic
and facultative ponds, Septic Tanks; Aerated lagoons.
Secondary Treatment: Overview of bacterial growth and decay in pure and
mixed cultures, Monod’s equation, Activated sludge process- analysis, concept
of MCRT, SVI, theoretical oxygen requirement, aeration processes and their