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4. Wastewater sample was prepared and incubated at 20°C for 5 days for BOD analysis. Sample volume used was 15 mL. The initial and final DO was found to be 8.7 mg/L and 3.12 mg/L respectively. If the temperature correction coefficient is 1.024 and the reaction rate coefficient at 20°C is 0.32 day-1 then a. What is the BODs (mg/L) at 20°C? b. What is the ultimate BOD (mg/L)? c. What is the BOD, (mg/L) at 16°C?

4. Wastewater sample was prepared and incubated at 20°C for 5 days for BOD analysis. Sample volume used was 15 mL. The initial and final DO was found to be 8.7 mg/L and 3.12 mg/L respectively. If the temperature correction coefficient is 1.024 and the reaction rate coefficient at 20°C is 0.32 day-1 then a. What is the BODs (mg/L) at 20°C? b. What is the ultimate BOD (mg/L)? c. What is the BOD, (mg/L) at 16°C?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Subject environmental engineering
**Wastewater Analysis for Biochemical Oxygen Demand (BOD)** A wastewater sample was prepared and incubated at 20°C for 5 days for BOD analysis. The sample volume used was 15 mL. The initial and final Dissolved Oxygen (DO) levels were measured as 8.7 mg/L and 3.12 mg/L, respectively. Given: - Temperature correction coefficient: 1.024 - Reaction rate coefficient at 20°C: 0.32 day⁻¹ **Questions:** a. What is the BOD₅ (mg/L) at 20°C? b. What is the ultimate BOD (mg/L)? c. What is the BOD₇ (mg/L) at 16°C? **Note:** This is a typical calculation for assessing the organic pollution level in water by determining the amount of oxygen microorganisms will consume to decompose the organic matter present in the water over a specified period.
Transcribed Image Text:**Wastewater Analysis for Biochemical Oxygen Demand (BOD)** A wastewater sample was prepared and incubated at 20°C for 5 days for BOD analysis. The sample volume used was 15 mL. The initial and final Dissolved Oxygen (DO) levels were measured as 8.7 mg/L and 3.12 mg/L, respectively. Given: - Temperature correction coefficient: 1.024 - Reaction rate coefficient at 20°C: 0.32 day⁻¹ **Questions:** a. What is the BOD₅ (mg/L) at 20°C? b. What is the ultimate BOD (mg/L)? c. What is the BOD₇ (mg/L) at 16°C? **Note:** This is a typical calculation for assessing the organic pollution level in water by determining the amount of oxygen microorganisms will consume to decompose the organic matter present in the water over a specified period.
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