A BOD analysis was begun on Monday. Fifteen ml of waste with a DO of zero was mixed with 270 mL of dilution water with a DO of 9 mg/L. The sample was then put in the incubator. Since the 5th day fell on a long weekend (Friday) and lab personnel do not work on Saturday, the final DO did not get measured until Monday, the eighth day. The final DO was measured at 2.8 mg/L. However, it was discovered that the incubator was mistakenly set at 32 ºC. Assume k is 0.15 day-1 at 20 ºC and θ= 1.05. Determine the 5-day 20 ºC BOD of the sample. Also, what is the ultimate CBOD at 32 ºC and 20 ºC; Will it vary?

Q: Plastics Liquid limit limit 1 1 Can number #7 #8 #9 #10 Mass of empty can (g) 1.7 1.8 1.7 1.7 Mass…

A:

Q: For the sample of solid wastes with the typical comp osition given in the following Table

A: Given The table with Moisture Content(MC) and dry weight(d) To find  X - Moistue content of Textile…

Q: Re 53.3 P

A:

Q: A wastewater sample of 2 ml is made up to 300 ml in a BOD bottle with distilled water. The initial…

A: Given- water sample volume=2 mL300 mL BOD bottleInitial DO=8 mg/LFinal DO=2 mg/LBOD=?

Q: A BOD analysis was conducted on a raw sewage sample. 300 mL of sample was placed in a 300 mL BOD…

A:

Q: A BOD test is conducted using standard size BOD bottles. The technician prepares  two BOD bottles on…

A:

Q: Bottle No. Volume of Initial PH Final PH Initial turbidity Final turbidity coagulant stock need (ml)…

A: Bottle 1 & 2  PH = 5.6 PH = -logH+10 5.6 =   -logH+10 H+= 10-5.6 mol/ml concentration(mg/ml)  =…

Q: If the volume of raw water sample examined for odour test is 200ml & volume of distilled water…

A: Volume of sample water A = 200 mL,Volume of distilled water B = 50 mL,To Find-The Threshold odour…

Q: The fractional collection efficiencies with weight distribution in the given particle size range.…

A: For calculating the overall collection efficiency we have to cumulative weight retain and divide it…

Q: If the BOD3 of a wastewater sample is 75 mg/l and reaction rate constantk (base e) is 0.345 per day,…

A:

Q: Define injection test and injection fall-off test.

A: We have to define the points like injection test and injection fall off test.

Mechanical Processes

In civil engineering, the materials have to undergo a series of manufacturing processes before using them in construction and structural applications. These manufacturing processes form the foundation stone of mechanical processes. Some of the civil engineering materials such as bars, metallic beams, metallic columns, surveying equipment, earthmovers, overhead cranes, structural and construction components, and even cement that is the most fundamental construction component need to undergo different manufacturing processes before they are ready to use. These processes are mechanical.