Sanitary Engineering (ENCE 305): Chapter 5 Wastewater Microbiology Notes 2025
Wastewater Microbiology Notes
SANITARY ENGINEERING (ENCE 305)
Chapter 5: Wastewater Microbiology
4 Hours 5 Marks

Wastewater Microbiology Notes

About this Chapter

This document contains the complete notes for Chapter 5: Wastewater Microbiology of Sanitary Engineering. Microbiology is essential in wastewater treatment as microorganisms are the primary agents for the degradation of organic matter.

In this chapter, students will learn about the classification of microbes (bacteria, fungi, algae, etc.), their growth requirements, and the kinetics of bacterial growth (biomass yield). It also covers the mechanisms of aerobic and anaerobic decomposition and the biological cycles of Carbon, Nitrogen, and Phosphorous.

Syllabus: Wastewater Microbiology

5. Wastewater Microbiology
4 hours
5 Marks

5.1 Microbes of interest and their roles in wastewater: Bacteria; Fungi; Algae; Protozoa; Rotifers; Crustaceans.

5.2 Types of microorganisms in wastewater: Based on carbon source, energy, and environmental factors (Oxygen requirement, pH, salt, temperature).

5.3 Requirement for microbial growth: Nutrient; Electron donor; Acceptor; Macronutrients and micronutrients; Environmental conditions.

5.4 Bacterial growth and biomass yield: Bacterial reproduction; Population dynamics; Growth curve and kinetics; Metabolism process (Anabolism and catabolism); Waste removal mechanism.

5.5 Decomposition of wastewater and type of bacteria: Aerobic; Anoxic; Facultative; Anaerobic decomposition with process microbiology.

5.6 Fates of carbon, nitrogen, phosphorous in wastewater.

5.7 Fresh and stale wastewater: Microbiological aspects.


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Special thanks to Madan Gorathoki Sir for providing these valuable notes.

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