Expressing the Demand of Oxygen in Sewage: 4 Ways | Waste Management
The following points will highlight the four main ways through which the demand of oxygen in sewage is expressed. The ways are: 1. Biochemical Oxygen Demand (BOD) 2. Chemical Oxygen Demand (COD) 3. Total Oxygen Demand (TOD) 4. Theoretical Oxygen Demand (ThOD). Way # 1. Biochemical Oxygen Demand (BOD): Biochemical oxygen demand (BOD) may be defined as the amount of [...]