Last two digit of id =030 4. If the ultimate BOD for wastewater has been estimated as (200+X) mg/l,calculate be the 5 days BOD value at 25°C? Assume K = 0.24 per day at 25°C.Interpret the result.Will the BOD5 value be same if the wastewater sample is incubated at 20°C?where, X = last two digits of your Student ID

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Answered: 4. If the ultimate BOD for wastewater…

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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You are building a wastewater lagoon with an inlet/outlet flow rate of 3,100 m3/day. The BOD inlet load is 26 mg/L and you need to achieve 12 mg/L at the outlet. The half-life of BOD is 2.4 days. What is the volume required for the lagoon? If the wastewater stopped entering the lagoon and was replaced by freshwater, how long would it take for the outlet BOD concentration to reach 1 ppm?
Please calculate the ThOD, COD, and ultimate BOD of a wastewater containing (a) 500 mg/L acetate (CH3COOH), which is fully biodegradable; or (b) 500 mg/L oil (C40H80), which is not biodegradable.
11. Assuming an organic loading on waste stabilization pond equal to 250 kg BOD/hal and detention time equal to 15 days, compute the pond area and the liquid depth the pond if the wastewater flow is 1 MLD having influent BOD5 equal to 200 mg/L.
Determine ultimate BOD for a wastewater having 5 day BOD at 20o C as 160 mg/L. Assume reaction rate constant as 0.2 per day (base 10).
A 8.5 ml of sample of wastewater is diluted to 300 ml with distilled water in standard biochemical oxygen demand bottle dissolved oxygen were initial 9.2 mg/l 3 days 8.7 mg/l and after 5 days 6.4 mg/l at 20 c determine the biochemical oxygen demand for three and five days of the wastewater then compute the ultimate BOD assume k=0.12/d
The DO of a river is 5.9 mg/L just downstream from a wastewater outfall. The mix ofriver and wastewater has a BOD of 25 mg/L. The DOs is 9.2 mg/L and the kd = 0.22 / day. a. estimate the rearation coefficient assuming a river speed of 0.20 m/s and anaverage depth of 3.5 m b. find the critical distance downstream where DO is a minimum c. what percent of BOD has to be removed from wastewater to maintain > 5mg / L DOif it is the only source of river BOD
You are constructing a sewage lagoon with a 3,100 m3/day inlet/outlet flow rate. You must attain a BOD outflow load of 12 mg/L given a BOD inlet load of 26 mg/L. BOD has a half-life of 2.4 days.What volume is needed for the lagoon and how long would it take for the output BOD concentration to reach 1 ppm if freshwater started to replace the wastewater that was previously entering the lagoon?
The BOD value of a wastewater was measured at 2 d and 8 d andfound to be 125 and 225 mg/L, respectively. Determine the 5 d BODvalue using the frst order rate model
A 15-mL sample of sewage is mixed with enough dilution water to fill a 300 mL BOD bottle. The bottle has an initial DO of 8.5 mg/L. At the end of 5 days, meausured DO is 2.8 mg/L. Calculate BOD5 of the sewage.
Solve Q 1.(a, b) a. Calculate 1-day BOD and ultimate BOD for a wastewater whose 5- day 20 °C BOD is 737. The reaction constant K= 0.23d -1. Also calculate 3-day BOD at 27°C? b. Calculate μ as a function of μmax for the domestic sewage considering S= 737 mg/l and Ks = 07 mg/l.
A BOD test is to be run on a sample of wastewater that has a 5 day BOD of 210 mg/L. The intial dissolved oxygen, DO of a mix of distilled water and wastewater is 7.9 mg/L. Roughly what is the maximum volume of wastewater should you put in the bottle if you want to have at least 2.0 mg/L of DO remaining at the end of 5 days?
If a manufacturing facility generates raw wastewater that is predominantly composed of dissolved and suspended solids and with ThOD of 100 mg/L, which of the following treatment equipment you could do away with? Check all that applies.

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4. If the ultimate BOD for wastewater has been estimated as (200+X) mg/l, calculate be the 5 days BOD value at 25°C? Assume K = 0.24 per day at 25°C. Interpret the result. Will the BOD5 value be same if the wastewater sample is incubated at 20°C? where, X = last two digits of your Student ID