Engineering

Civil EngineeringQ&A LibraryA primary wastewater treatment uses centrifugation for dewatering of primary sedimentation sludge. The raw wastewater contains 300 mg/L TSS and 250 mg/L BOD5. The average daily flow to the treatment plant is 5000 m3/d. In primary sedimentation basin, TSS removal is 55%, and BOD5 removal is 30% of the incoming flow. The primary sludge contains 3.5 % solids. The TSS and BOD5 capture efficiency of centrifugation is 90 % each, and the moisture (water) content of the sludge cake is 70 %. Assume the specific gravities of the primary and sludge cake are 1.01 and 1.06 g/cm3. 1. Calculate the primary sludge flowrate (underflow rate) (m3/d). 2. Calculate sludge cake flowrate (m3/d).Start your trial now! First week only $4.99!*arrow_forward*

Question

- A primary wastewater treatment uses centrifugation for dewatering of primary sedimentation sludge. The raw wastewater contains 300 mg/L TSS and 250 mg/L BOD
_{5}. The average daily flow to the treatment plant is 5000 m^{3}/d. In primary sedimentation basin, TSS removal is 55%, and BOD_{5}removal is 30% of the incoming flow. The primary sludge contains 3.5 % solids. The TSS and BOD_{5}capture efficiency of centrifugation is 90 % each, and the moisture (water) content of the sludge cake is 70 %. Assume the specific gravities of the primary and sludge cake are 1.01 and 1.06 g/cm^{3}. - 1. Calculate the primary sludge flowrate (underflow rate) (m
^{3}/d). - 2. Calculate sludge cake flowrate (m
^{3}/d).

Tagged in

Engineering

Civil Engineering

Find answers to questions asked by students like you.

Q: Determine the forces in members CJ and IJ of the truss shown by the method of Section. State whether...

A: Click to see the answer

Q: Consider the beam shown in (Figure 1). Suppose that w = 25 kN/m. Point E is just to the right of the...

A: Click to see the answer

Q: The wind blows uniformly on the front surface of the metal building with a pressure of 1.8 kN/m². De...

A: We are authorized to answer one question at a time, since you have not mentioned which question you ...

Q: Engineering Economics

A: Given details Opening net book value = Php. 230,500.00 Salvage value after digging 300000 metres of ...

Q: 1. The following interior angles of a triangle traverse were measured with the same precision. NO. O...

A: Given :- Interior angles of a triangle traverse were measured with same precision Angle Value No....

Q: A rectangular beam with b = 250 mm and d = 460 mm is reinforced for tension only with 3-25 mm bars. ...

A: Given: Width of the beam, b=250 mm depth of the beam, D=460 mm Reinforcement provided is 3 numbers o...

Q: Correct the survey data below for a closed traverse. LINE DISTANCE BEARING AB 495.85 m N 05°30’...

A: Given :- Survey data for a closed traverse is given below LINE DISTANCE BEARING AB 495.85 m N 0...

Q: Determine the position and calculate the value of the maximum bending moment in the loaded half of t...

A: Click to see the answer

Q: Consider a mercury manometer connected to a tank of water, as shown in the diagram below. Please cal...

A: Click to see the answer

Q: answer the image below

A: total load on Column 1(W1) =1200KN + 816KN =2016KN total load ...

Q: PROBLEM 2 Determine the maximum weight W that can be supported as shown. Cable FG has a maximum stre...

A: Click to see the answer

Q: Three forces act at a point as shown. Determine the magnitude and direction (from the positive x-axi...

A: Click to see the answer

Q: Using the method of sections, please determine the forces in DC, DE, CB, CF and EF, also referring i...

A: Solution Analyse truss by using equilibrium equation ∑H=0 .....................Eq(1) ∑V=0..............

Q: A leaking triangular trough, 5 feet across, 9 ft in length and with a depth of 6ft, is continually f...

A: Triangular trough is as shown in figure.

Q: A dumpy level with an interval focusing telescope has set-up on the left bank of a river and the rod...

A: Solution Given data Stadia interval factor k= 100

Q: Calculate the depth of neutral axis of a beam of size 450 x 300 mm Use M25 grade concrete and 4 no. ...

A: Click to see the answer

Q: Vehicles arrive at a toll system at random at an average rate of 12 vehicles per minute. If there ar...

A: Vehicles arrival average rate = λ=12 vehicles per minute Capacity in each toll = 1 vehicle in 6 seco...

Q: Civil Engineering Question

A: Click to see the answer

Q: A round steel alloy bar with a diameter of 19mm and a gauge length of 76mm was subjected to tension,...

A: Given data: Diameter of round steel alloy bar = D = 19 mm Gauge length = L = 76 mm Area of steel bar...

Q: List down the control activities that may be useful to any of the following: a) The construction of ...

A: Since question has open choice regarding the options, the solution for option a is as follows: Const...

Q: Determine the forces in members CJ and IJ of the truss shown by the method of Section. State whether...

A: Click to see the answer

Q: Assuming that P = 48 000 lb and that it may be applied at any joint onthe line FJ, determine the loc...

A: Fig(a) ...

Q: The average design flow at a wastewater treatment plant facility is 1.5 m3/s. The bar rack is mechan...

A: Design Flow = 1.5 m3/s Clear spacing between bars of bar rack = 2.5 cm

Q: The figure below gives the plot of void ratio versus pressure data from a consolidation test. 0.90 0...

A: Draw the figure.

Q: Light from a chromatic light source strikes a surface Twenty percent is reflected and 30% is absorbe...

A: Calculation of transmitted light for the given scenario: Ltransmitted=Lincident-Lreflected-Labsorbed...

Q: Calculate the total float, free float and independent float for the project whose activities are giv...

A: Click to see the answer

Q: Engineering Eonomics Solution

A: Purchase value : 10,000 Life : 20 years Salvage value SV20 = 0 Salvage value can be given as, SV ...

Q: Determine the magnitude of the force P needed to support the 100 lb weight in the pulley system. Eac...

A: Given: The weight in the pulley is 100 lb. The weight of each pulley is 10 lb. Consider the figure,

Q: A hydraulic oil is flowing in a horizontal drawn steel hydraulic tube ( ɛ = 1.5 x 10 -"m) with an ID...

A: The given data is shown below: ε=1.5×10-6 mInner diameter=0.047 mPressure difference=68 kPaSpecific ...

Q: Calculate the power radiated by a woodstove of dimensions 65 cm high by 55 cm deep by 85 cm wide wit...

A: Data given: Dimensions: Height (H) = 65 cm Depth (D) = 55 cm Width (W)= 85 cm Surface temperature = ...

Q: |10KN |10KN 15KN D 10KN |10KN 15KN G' 'A 24kN C E 16kN 5.0 m 5.0 m 5.0 m 15.0 m Select all joints th...

A: Click to see the answer

Q: Q2 Figure Q2 shows a cross section of a river at Sg. Melaka treatment plant. Using data in Table Q2,...

A: Solution by Velocity-Area method by Mean-Depth

Q: Determine the force in member DE and all the reaction forces working in all supports

A: Using the equilibrium equations Σ Fy =0VC + VE = 3000Σ MC = 0-2000 × 24 - 1000 × 16 + VE × 6 = 0VE =...

Q: 4) Obtain the reaction forces of the beam given below. The beam below is called Gerber beam (G¡ and ...

A: Click to see the answer

Q: A 28 cm diameter pipe exits a reservoir as shown. What is the pressure head at Point 2?

A: Given Given:A 28 cm diameter pipe exits a reservoir as shown. To determine: Pressure head ...

Q: In 100 yrs, 100mg of radium decomposes to 96mg. How many mg will be left after 217 yrs?

A: Click to see the answer

Q: Convert the angle 238o25’50’’ into its equivalent in decimal degrees Convert to degrees, minutes and...

A: 1. The formula to calculate the angle 238∘25'50'' into its equivalent in decimal degrees is given by...

Q: 2. Determine the lengths of the two non- adjacent missing sides of a given closed traverse. AZIMUTH ...

A: Click to see the answer

Q: a-)Determine the average shear strain on ALL corners b-)Determine the normal strains across the AC ...

A: The value of strains across the corner will be; first of determining the strain at AC will be: AC'=s...

Q: A 100 mm2 square cast iron (CI) encased a steel circular rod of 40mm diameter. The assembly is 2 m l...

A: Given, 200 kN load applied on assembly E of cast iron = 100 GPA E of steel = 200 GPA Area of cast i...

Q: Determine the centroidal coordinates of the cross-sectional area shown.

A: Click to see the answer

Q: For the ff. beams:a. Determine the location of the neutral axis from the bottom of the beam.b. Calcu...

A: Formula to calculate the centroid of the section is as below: x¯=∑Ax∑A y¯=∑Ay∑A Formula to calculate...

Q: The wind blows uniformly on the front surface of the metal building with a pressure of 1.8 kN/m?. De...

A: Given data : Pressure, P=1.8 kN/m2 To find : (a) Resultant Force, F (b) Location of resultant forc...