Difference Between COD, BOD and DO in Environmental Engineering In environmental engineering, the quality of water and wastewater is often evaluated using three important parameters: Dissolved Oxygen (DO) , Biochemical Oxygen Demand (BOD) , and Chemical Oxygen Demand (COD) . These parameters help engineers determine the level of pollution in water bodies and the amount of oxygen required to break down organic matter. 1. Dissolved Oxygen (DO) Dissolved Oxygen (DO) is the amount of oxygen dissolved in water. Aquatic organisms such as fish and microorganisms need dissolved oxygen to survive. DO is usually measured in mg/L (milligrams per liter) . Higher DO values indicate better water quality . Importance of DO Essential for aquatic life Indicates health of rivers and lakes Helps determine pollution level in water 2. Biochemical Oxygen Demand (BOD) Biochemical Oxygen Demand (BOD) is the amount of oxygen required by mic...
Environmental Engineering (Vol. I): Water Supply Engineering Environmental Engineering (Volume I): Water Supply Engineering is a well-known textbook written by S. K. Garg and published by Khanna Publishers . The book is widely used by civil engineering students and professionals for learning the fundamentals of water supply systems. About the Author S. K. Garg is a respected author in the field of civil and environmental engineering. His books are popular because they explain complex engineering concepts in a clear and easy-to-understand manner . Many universities recommend his books for civil engineering courses. About the Book This book focuses on the planning, design, and management of water supply systems . It explains how water is collected from natural sources, treated to make it safe, and distributed to cities and villages. The book contains detailed explanations, diagrams, and numerical problems that help students under...