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0. What is the BODs of the wastewater sample if the DO values for the blank and diluted samples a...
QUESTION 5 5.1 Determine the 4-day BOD and the Ultimate BOD (1st stage) for a wastewater...
QUESTION 5 5.1 Determine the 4-day BOD and the Ultimate BOD (1st stage) for a wastewater whose BODs at 20 °C is 250 mg/l. The reaction constant is k=0.23d" (base e). Determine the BODs if the test had been done at 25 °C. (10) 5.2. The chlorination unit in a WWTP uses 10 containers of chlorine on a monthly basis. A chlorine dosage is 4 mg/l is used to treat an average monthly wastewater effluent of 500 000 mDetermine the...
6) (10 points) The BODs of a wastewater sample is expected to range from 25 to...
6) (10 points) The BODs of a wastewater sample is expected to range from 25 to 200 mg/L. Three different dilutions are prepared to cover the range. The same procedure was used for each analysis and 300 ml BOD bottles are used for the BODs test. Please determine average BODs value with standard deviation Sample Volume Initial DO, mg/L Final DO, mg/L 5 mL 9.2 6.7 10 mL20 mL 9.0 1.5 8.9 4.5
4. A 20 mL wastewater sample was mixed with 280 mL deionized (DI) water in a...
4. A 20 mL wastewater sample was mixed with 280 mL deionized (DI) water in a standard BOD bottle. The 5- day BOD test provided an initial dissolved oxygen concentration (DO intial) = 9 mg/L and a final dissolved oxygen concentration (DO final) = 3.5 mg/L. The BOD experiment was carried out at 20°C and the BOD rate constant at 20°C is 0.22/day. a. Find the dilution factor (P) and BODs value at 20°CY b. Find the ultimate BOD of...
T College of Engineering I0 Ouestion 2 reaction rate constant at 20 "C was determined to be 0.27 ...
t College of Engineering I0 Ouestion 2 reaction rate constant at 20 "C was determined to be 0.27 (a) Determine the BOD exerted in the water after 5 days at 20-C (10%) (b) The temperature of the paper mill emuert is 23°C, 0 057 m's of wastewater which has an ultimate B0D of 720 mg/l. The What is the actual BODs being discharged to the stream ( 10%)? (c) If the paper mill effluent is discharged into a stream having...
(20 pts) The ultimate BOD of a domestic wastewater is 275 mg/L and the e based...
(20 pts) The ultimate BOD of a domestic wastewater is 275 mg/L and the e based rate constant k=0.24 d a. (4 pts) What will be the 5-day BOD (Sample-1)? b. (4 pts) What will be the 7-day BOD? (Sample-1)? c. (4 pts) A different sample has the same ultimate BOD given in the question, but the 20 °C k value (e based) is equal to 0.36 dl Determine the 5-day BOD of this sample (Sample-2). d. (8 pts) Please...
7. A BOD test is run using 100 mL of treated wastewater effluent mixed with 200...
7. A BOD test is run using 100 mL of treated wastewater effluent mixed with 200 mL of dilution water (containing no BOD). The initial DO of the mix is 9.0 mg/L After 5 days, the DO is 4.0 mg/L. After a long period of time, the DO is 2.0 mg/L, and it no longer seems to be dropping. Assume nitrification has been inhibited so that only carbonaceous BOD is measured (a) What is the 5-day BOD of the wastewater?...
2. To determine the BOD in an industrial wastewater sample, a seeded BOD analysis was conducted;...
2. To determine the BOD in an industrial wastewater sample, a seeded BOD analysis was conducted; data are summarized in the table below. Ten mL of wastewater was added per 300 mL bottle to determine the dissolved oxygen demand of the aged, settled wastewater seed (test A). The seeded test bottles (test B) contained 2.5 mL of industrial wastewater and 1.2 mL of seed wastewater a) What is the five-day BOD in this industrial wastewater? What is the k-value using...
A wastewater sample has a temperature of 10 °C. The 5-day BOD (BOD) of the wastewater...
A wastewater sample has a temperature of 10 °C. The 5-day BOD (BOD) of the wastewater sample is determined as 120 mg/L at 10 °C, and the BOD decay constant (k) is known as 0.20 day 1 at 20°C. Calculate the BOD decay constant (k) at 10 °C.
Given the following BOD data: Time (days) Diluted sample DO (mg/l). 7.95 3.75 3.45 2.75 2.15...
Given the following BOD data: Time (days) Diluted sample DO (mg/l). 7.95 3.75 3.45 2.75 2.15 1.80 Blank seeded sample Do (mg/l) 8.15 8.1 8.05 8.0 7.95 7.9 Find the BOD at 5 days knowing that the diluted sample was diluted 100 times, i.e., P=1/100-volume wastewater/[volume of wastewater+dilution water (300 ml)).
2. The 5-day, 20°C BOD of a wastewater (K 0.23/day, 0 1.047) is 185 mg/L. What...
2. The 5-day, 20°C BOD of a wastewater (K 0.23/day, 0 1.047) is 185 mg/L. What is the corresponding 10-day demand and ultimate BOD (in mg/L)? If the bottle had been incubated at 33°C, what would the 5-day BOD value have been?
QUESTION 5 5.1 Determine the 4-day BOD and the Ultimate BOD (1st stage) for a wastewater whose BODs at 20 °C is 250 mg/l. The reaction constant is k=0.23d" (base e). Determine the BODs if the test had been done at 25 °C. (10) 5.2. The chlorination unit in a WWTP uses 10 containers of chlorine on a monthly basis. A chlorine dosage is 4 mg/l is used to treat an average monthly wastewater effluent of 500 000 mDetermine the...
6) (10 points) The BODs of a wastewater sample is expected to range from 25 to 200 mg/L. Three different dilutions are prepared to cover the range. The same procedure was used for each analysis and 300 ml BOD bottles are used for the BODs test. Please determine average BODs value with standard deviation Sample Volume Initial DO, mg/L Final DO, mg/L 5 mL 9.2 6.7 10 mL20 mL 9.0 1.5 8.9 4.5
4. A 20 mL wastewater sample was mixed with 280 mL deionized (DI) water in a standard BOD bottle. The 5- day BOD test provided an initial dissolved oxygen concentration (DO intial) = 9 mg/L and a final dissolved oxygen concentration (DO final) = 3.5 mg/L. The BOD experiment was carried out at 20°C and the BOD rate constant at 20°C is 0.22/day. a. Find the dilution factor (P) and BODs value at 20°CY b. Find the ultimate BOD of...
t College of Engineering I0 Ouestion 2 reaction rate constant at 20 "C was determined to be 0.27 (a) Determine the BOD exerted in the water after 5 days at 20-C (10%) (b) The temperature of the paper mill emuert is 23°C, 0 057 m's of wastewater which has an ultimate B0D of 720 mg/l. The What is the actual BODs being discharged to the stream ( 10%)? (c) If the paper mill effluent is discharged into a stream having...
(20 pts) The ultimate BOD of a domestic wastewater is 275 mg/L and the e based rate constant k=0.24 d a. (4 pts) What will be the 5-day BOD (Sample-1)? b. (4 pts) What will be the 7-day BOD? (Sample-1)? c. (4 pts) A different sample has the same ultimate BOD given in the question, but the 20 °C k value (e based) is equal to 0.36 dl Determine the 5-day BOD of this sample (Sample-2). d. (8 pts) Please...
7. A BOD test is run using 100 mL of treated wastewater effluent mixed with 200 mL of dilution water (containing no BOD). The initial DO of the mix is 9.0 mg/L After 5 days, the DO is 4.0 mg/L. After a long period of time, the DO is 2.0 mg/L, and it no longer seems to be dropping. Assume nitrification has been inhibited so that only carbonaceous BOD is measured (a) What is the 5-day BOD of the wastewater?...
2. To determine the BOD in an industrial wastewater sample, a seeded BOD analysis was conducted; data are summarized in the table below. Ten mL of wastewater was added per 300 mL bottle to determine the dissolved oxygen demand of the aged, settled wastewater seed (test A). The seeded test bottles (test B) contained 2.5 mL of industrial wastewater and 1.2 mL of seed wastewater a) What is the five-day BOD in this industrial wastewater? What is the k-value using...
A wastewater sample has a temperature of 10 °C. The 5-day BOD (BOD) of the wastewater sample is determined as 120 mg/L at 10 °C, and the BOD decay constant (k) is known as 0.20 day 1 at 20°C. Calculate the BOD decay constant (k) at 10 °C.
Given the following BOD data: Time (days) Diluted sample DO (mg/l). 7.95 3.75 3.45 2.75 2.15 1.80 Blank seeded sample Do (mg/l) 8.15 8.1 8.05 8.0 7.95 7.9 Find the BOD at 5 days knowing that the diluted sample was diluted 100 times, i.e., P=1/100-volume wastewater/[volume of wastewater+dilution water (300 ml)).
2. The 5-day, 20°C BOD of a wastewater (K 0.23/day, 0 1.047) is 185 mg/L. What is the corresponding 10-day demand and ultimate BOD (in mg/L)? If the bottle had been incubated at 33°C, what would the 5-day BOD value have been?
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