2. A 5-day BOD of a sample was determined to be 250.0 mg/L and the rate...
(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...
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?
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.
Determine the rate constant and ultimate BOD from the following data: (3 oints Time (day) (mg/L) BOD 65 109 138 158 178 190 200 205 210 212 4 10
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...
5. A series of BOD (ATU) determinations was made in a sample to enable calculation of the ultimate BOD and rate constant. Incubation was carried out on a 5 per cent dilution of the sample at 20°C when the initial saturation DO for samples and blanks was 9.10 mg/. Day Final Do in sample (mg/l) Final Do in dilution water (mg/l) 1 2 3 4 5 6 7 7.10 6.10 5.10 4.20 3.90 3.50 3.00 9.00 9.00 8.90 8.90 8.80...
(a)The 5-day BOD of a sewage sample is 180 mg/L at 15°C. What is the BODu when k is 0.52 d-1 at 25°C? (use the Arrhenius equation, kt2=kt1?t2-t1 where ?=1.135 for 4-20°C and 1.056 for 20 -30°C (b)Graph the BOD as a function of time for the previous problem for both 15°C and 25°C. What do you observe?
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...
Determine the ultimate BOD (BODu) and 5-day BOD (BOD5) given that the BOD4 of a waste is 130 mg/L and K is 0.075 d-1 . Use yt=Lo(1-e-kt) and k=2.303(K).
Calculate the BOD Ultimate value given the following information BOD5= 316 mg/L k = 0.23 day-1 Temperature is 20 C for both BOD5 and BOD Ultimate (L)