Develop an estimate of the volumetric flow rate of air

Assignment Help Civil Engineering
Reference no: EM13299589

Develop an estimate of the volumetric flow rate of air that will be required for aeration of the mixed liquor in an activated sludge system.For this calculation, assume that the (ultimate) CBOD is 200 mg/L and (ultimate) NBOD is 50 mg/L. For purposes of this problem, assume that these two sources of oxygen demand are completely satisfied in the activated sludge system (i.e., assume that all CBOD and NBOD are completely "consumed" by the aerobic bacteria in the aeration basins). Assume an oxygen (O2) transfer efficiency of 25% from the aeration system in the aeration basins. Based on these characteristics, what volume of air will we need to pump through our aeration basins each day to satisfy this oxygen demand?

Reference no: EM13299589

Questions Cloud

Determine what are the major nutrients required for growth : What are the major nutrients required for growth of microbial population in wastewater treatment plants. List the major differences and similarities between hetrotrophic bacteria and nitrifying bacteria.
Discuss the difference between economic costs and accounting : Discuss the differences between the long run and the short run. What are the implications for the firm of making decisions in the short run and making decisions in the long run? Discuss the limitations and freedom of the two time horizons.
Find and plot initial vertical effective stress distribution : A 35 feet diameter oil storage tank is built on a 100 ft thick soil layer. The tank exerts an uniform pressure of 1000 pcf on the ground surface. The groundwater table is 10 ft below the ground surface.
Calculate the level at tpl of a vertical crest curve : A vertical crest curve has an approach grade +6% and a departure grade -6%. The Vertical intersection point level is 125 m. It is proposed to use a curve 720 m long. Calculate the level at TPl.
Develop an estimate of the volumetric flow rate of air : Develop an estimate of the volumetric flow rate of air that will be required for aeration of the mixed liquor in an activated sludge system.For this calculation, assume that the (ultimate) CBOD is 200 mg/L and (ultimate) NBOD is 50 mg/L.
Determine the dead load per unit of length on a beam : A floor system consists of wide flange steel beams (W18 x 60) equally spaced at 8ft center to center. A 6inch reinforced concrete slab spans between beams. The bottom of the slab is coated with plaster and the top of the slab has ¾inch hardwood fl..
Determine properties of the material poissons ratio : At the proportional limit, . gage length of a -diameter alloy rod has elongated . and the diameter has been reduced . The total tension force on the rod was . Determine the following properties of the material
Which would require less wood and by what percentage : An engineer is to design a channel lined with planed wood to carry 2 m3/s of water on a given slope. The channel cross section can be either a 90 degree triangle or a square. Which would require less wood and by what percentage
Calculate weight of water added to reach the saturation : A soil sample with a volume of 0.5 m3, dry unit weight = 18.1 kN/m3, water content = 5%, and Specific Gravity of the soil solids = 2.68. Calculate weight of water added to reach 90% saturation (in kilograms)?

Reviews

Write a Review

Civil Engineering Questions & Answers

  Determine what percentage of the time will the through lane

A traffic engineer is trying to design a left turn bay on an EB approach to an intersection. The signal timing for left turns will have 10 seconds of "left turn only" green time and 50 seconds of red time each signal cycle.

  Determine an appropriate plywood thickness and span rating

For a total floor load of 75 psf on 2x floor framing at 24 o.c., determine an appropriate plywood thickness and span rating assuming panels with edge support and panels oriented perpendicular to the framing. Specify the minimum fasterners and spac..

  Conduiting with a roughness coefficient

Given an 18-in. concrete conduit with a roughness coefficient of n = 0.013, s = 0.02, and a discharge capacity of 15 cfs, what diameter pipe is required to triple the capacity?

  Discuss the dangers of optimization in terms of min section

Discuss the dangers of optimization in terms of minimum section to support loads. In other words, how would optimizing for bending stresses affect the shear capacity of a section

  Find the net present worth of the project

find the net present worth of the project,and the internal rate of return ,and the annual worth of the project?

  What are the coordinates of the centroid

For determining the centroid of the area, two square segments are considered; square ABCD and square DEFG. What are the coordinates (x, y ) of the centroid of square DEFG?

  Determine the difference in the rate of grade

indicate the conditons by a sketchand determine the difference in the rate of grade at the intersection of each of the following paris of slops.

  Determine the vertical force exerted by the balloon

A ballon is tethered at a height of 16.8 m above the ground by three cables. if the tension in highlighted cable is 60 N , determine the vertical force exerted by the balloon at the base of the balloon basket.

  What are the total heads given by piezometers b and c

The total heads given by piezometers A and D are 98.9 cm and 3.6 cm, respectively. What are the total heads given by piezometers B and C?

  Change in it internal energy

A gas is compressed at a constant pressure of 0.800 atm from 9.00L tp 2.00L. in the process, 400J of energy leave the gas by heat. (a) What is the work done on the gas? (b) What is the change in it internal energy?

  Shear and bending moment expressions

Show or formulate the shear and bending moment expressions for each board, and plot/draw the shear and bending moment diagrams of the boards.

  Calculate the temperature of the air in fahrenheit

The "sea-level adjusted" pressure at the airport was about 30.57 inches of mercury. Assuming the density of air is 1.30 kg/m3 and the gas constant for air is 287. J/(kg K), calculate the temperature of the air in Fahrenheit.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd