what is the chemical oxygen demand (COD) and the biological oxygen demand (BOD) of a water? which one is always greater? why?
what is the chemical oxygen demand (COD) and the biological oxygen demand (BOD) of a water?...
If the BOD (biochemical oxygen demand) of a water sample is 2 ppm, the COD (chemical oxygen demand) will be greater or less than 2ppm
Biological oxygen demand (BOD) is a water quality parameter that measures the amount of dissolved oxygen used by aerobic microorganisms when breaking down organic matter in water. The first order BOD reaction rate constant for treated wastewater is 0.2 day-1 at 20 °C. What is the first-order rate constant in winter conditions at 2 °C? Assume the activation energy for the reaction is 31.95 kJ/mol. Group of answer choices A. 0 hr-1 B. 0.008 hr-1 C. 0.085 hr-1 D. 0.0035...
Biological Oxygen Demand (BOD) is an index of pollution that is monitored in the treated effluent (the liquid waste produced during manufacturing, typically discharged into nearby rivers) of paper mills (as well as other manufacturing buildings) on a regular basis. Suppose that the BOD (in pounds per day) is recorded at a particular paper mill during the spring and summer months. If a BOD of 3526 was 1.3 standard deviations above the mean and a BOD of 3001 was -2.6...
biological oxygen demand (BOD) is an index of pollution that is monitored in the treated effluent of paper mills on a regular basis. form 43 determined nations of BOD (in pounds per day) at a particular paper mill during the spring and summer months, the mean and standard deviation were found to be 3246 and 757, respectively. the company has set the target that the mean BOD should be 3000 pounds per day. Do the sample data indicate that the...
3. (5%) (a) Write the definitions of BOD, COD, and NOD. (b) Write the reaction that you expect in COD test tubes. Explain how we estimate the amount of organics in the COD test. (c) What happens if Cl' is present in COD tests? Write the chemical reaction and describe how Cl' affects the COD measurement. (d) Explain why mercury is added in COD test tubes. In your explanation, write the expected chemical reaction with added mercury.
Using chemical equations, determine the BOD, COD and TOC for 1 mole/L of C6H12O6
need help Table Q4 shows the means for the removal reduction of chemical oxygen demand (COD) in wastewater by three different treatment methods. By using One-Way Analysis of Variance (ANOVA), test the validity of hypothesis that there are no differences among the reduction percentage by the treatment method at significance level of 0.05 (a 0.05) (25 marks) Table Q4: The mean data for the removal reduction of COD in wastewater for three different treatment methods (in percentage (%)) Treatment 1...
A 200.0 mL sample of water was titrated with 0.00355 M K2Cr2O7 to determine chemical oxygen demand. If it required 26.3 mL of potassium dichromate to reach the end point, what is the COD of water in mg O2/L?
Biological oxygen demand (B0D) is an index of pollution that is monitored in the treated affluent of paper mills on a regular basis. From 43 determinations of BOD (in pounds per day) at a particular paper mill during the spring and summer months, the mean and standard deviation were found to be 3246 and 75% respectively. The company had set the target that the mean BOD should be 3000 pounds per day. Do the sample data indicate that the actual...
As a wastewater technician you are receiving sewage with a biological oxygen demand of 200. Which process would be best to treat this sewage? As a wastewater technician you are receiving sewage with a biological oxygen demand of 200. Which process would be best to treat this sewage? A.sludge digesters B.secondary anaerobic treatment C. bioreactors D. secondary aerobic treatment