A town produces 8 million litre of sewage per day. BOD of sewage is 260 mg/L, it is to be discharged into a river flowing at a rate of 0.2 m³/s and it's BOD is 5 mg/L. Find out the BOD of river after mixing? [Assume mixing is instantaneous]
Q: What is the total number of unknowns if determining the reactions at points A, B, C, D, and E? C 250…
A:
Q: For masonry built in 1:1:6 cement- lime. sand mix mortar or equivalent, the horizontal shear stress…
A:
Q: 矩形截面简支梁,加载于梁中点C,如图示。求amax Imaxo Simply supported beam with rectangular section, loaded at beam…
A: A simply supported beam is given we need to find out σmax and ?max
Q: The average daily traffic on a stretch of road is 300 commercial vehicles per lane per day. Design…
A:
Q: the steel areas required for the section shown. The dimensions are limited to the values shown. If…
A:
Q: P5.16 to P5.21. For each beam, draw the shear and moment diagrams, label the maximum values of shear…
A:
Q: Draw the influence lines for (a) the vertical read (b) the shear at C, and (c) the moment at C.…
A:
Q: 1. Draw the shear and moment diagram for the frame shown. 4 m A 100 KN 1.5 m+1.5 m 12 kN/m 5 m- 1
A:
Q: 19.1 A 60-ft-span of a simply supported pretensioned beam has the section shown in Fig. 19.12. The…
A: segment A(in2) y(in) Ay Iy(in4) d(in) Ad2+Iy(in4) 1 120 3 360 360 16.936 34779.37 2 144 18 2592…
Q: On a railway track, two types of trains, passengers and freights, are being operated. The speed of…
A: Given; The radius of the circular curve = 2965 m Speed of freight trains = 22 km/h The lateral…
Q: Areal Precipitation 4. Determine the areal rainfall of the given drainage basin below using: a.…
A:
Q: An extended layer of soil with homogeneous rounded grains has 10% of the material finer than 0.007…
A: An extended layer of soil- 10% of the material finer than 0.007 mm. Constant C=750, To Find- The…
Q: As per Terzaghi's equation, the bearing capacity of strip footing resting on cohesive soil (c= 10…
A:
Q: PLEASE ANSWER QUESTION 4 stated above HOW DID WE OBTAIN 0.38 and 0.07 for solution 3.…
A: The design speed = 65 mph The number of lanes = 8 The superelevation rate = 6% The initial grade =…
Q: Handwritten work only pls For each beam, draw the shear and moment diagrams, label the maximum…
A: The beam with loading and support conditions is given as To find:- Shear and moment diagrams…
Q: Through a very narrow gap of height 'h a thin plate of large extent is pulled at a velocity V. On…
A: Given- The given situation of the question is shown below in the diagram- It is needed to find the…
Q: A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of…
A:
Q: A normally consolidated clay that have c=20 and Ø = 30 if 0.5P - 0.3q=23 find: 1-0₁f and σ3f 2-0nf…
A:
Q: Prob. 2. Is the truss statically determinate? Show your solution
A: The given truss is shown below.
Q: Draw a neat, fully annotated shear force and bending moment diagram, including the maximum in span…
A: The loading diagram is shown below. Hint : Horizontal distance of BD=3 cos45°=2.12 mVertical…
Q: 6-3. Draw the influence lines for (a) the moment at C, (b) the vertical reaction at A, and (c) the…
A:
Q: ABC is a continuous member and is pin-connected at A. There is a smooth pin, which is fixed to the…
A: Member ABC: Member CD:
Q: Estimate the G.I. of sub-grade soil from the following data: (i)Passing 425mic = 72% (ii)Passing…
A: Given (i)Passing 425mic = 72% (ii)Passing 75mic = 55% (iii)Liquid limit = 39% (iv)Plastic limit =…
Q: 6.25 A four-lane freeway (two lanes in each direction) segment consists of passenger cars only, a…
A: Number of lanes = 4 Number of lanes in each direction, N=2 Peak hour distribution, D = 0.7 Peak…
Q: In a consolidated-drained triaxial test on aclay, the specimen failed at the deviator stress of 124…
A: Deviator stress σd=124 KN/m2 Effective stress friction angle ϕ=31o To find: The effective confining…
Q: A tension member is composed of two 4x10 plates. They are connected to a gusset plate with the…
A: A tension member is composed of two 34×10 plates. A36 grade of steel used Diameter of bolts, d = 1…
Q: 9-3 Determine the deflections and slopes of section A and point C for following cantilevers.…
A: Since two methods are given, the two cantilever beams are solved using the first method. Analyze the…
Q: 10–25. Determine the force in each member of the truss. AE is constant. Show primary and secondary…
A: To Calculate- force in each member of the truss.
Q: Draw the shear and bending moment diagrams and calculate the maximum normal stress. 25 kN - m 40…
A:
Q: The plate is deformed into the dashed shape as shown. If in this deformed shape, the horizontal…
A: The plate is deformed into the dashed shape L = 340 mma = 7mmb = 4 mm It is asked to determine the…
Q: Do Q2: A municipal wastewater treatment plant discharges secondary condition occurs in the summer…
A: Wastewater characteristics: Q1=10000 m3/d=0.116 m3/sC1=30 mg/lDO1=1.5 mg/lT1=25°C Stream…
Q: USE THREE MOMENT EQUATION METHOD
A: Using three MOMENT equations calculation of member end moment Calculation ###
Q: A square box beam is made of two 20X80-mm planks and two 20X120-mm planks nailed together as shown.…
A: A square box beam is made of 80 x120 mm s=50 mm allowable shearing force= 300N As the maximum…
Q: The sum of the moments about point A due to the forces and couples acting on the bar is zero. a)…
A: Sum of forces and couple about A = 0 Couple at A = 20 kNm Vertical force at A = 5 kN Horizontal…
Q: USE THREE MOMENT EQUATION Determine the reactions and draw the shear and bending moment diagrams…
A: E = 29000 ksi = 201.4 ksf I = 1530 in4 = 0.074 ft4 The support settlements of 1 in. at B and; 1/4…
Q: Project Location Description CALIFORNIA BEARING RATIO (CBR) TEST Samples Description ASTM D 1883 Day…
A: To find - Swelling Index
Q: accepted to 10 % then the eturn period for design should be? (b) 1-(0.9)0.10 (d) 1/(1+0.90.10) 0.10…
A:
Q: Q2: The average rainfall of 5 rain gauges in the base stations are 89 cm, 54 cm, 45 cm, 41 cm, and…
A:
Q: uppose the caravan of 10 cars begins immediately in front of the first toll booth, travels 20 km to…
A: Propagation speed is 45km/hr, Tollbooth count is 3 Number of cars is 10 total toll booths…
Q: Draw the free body diagrams of each section.
A:
Q: If the declination is 5° 40' W, which one of the following magnetic bearing would represent the true…
A: Declination=5o 40' W It is the needed to find the true bearing of the S 25o20' E.
Q: It is known that a concrete mix has 180 kg/m3 of water, 315 kg/m3 of sand. What is the coarse…
A: In 1 m3 of concrete mix : Water 180 kg , Cement = 315 kg Additional fines = 149 kg and sand = 528 kg…
Q: Simply supported beam of Length 16m Subjected to dead Load 5 KNlm and Live Load greater than span as…
A: Dead load = 5 KN/m Live load = 8 KN/m Determine using Influence line 1. Maximum shear force at 4m…
Q: mple 16. The contour interval on a map is 15 m. If the upward gradient of 1 in 20 is required to be…
A: Contour interval=15 m Upward gradient= 1 in 20 Horizontal equivalent between A & B=?
Q: A 60⁰ B 6 m 5t 60°
A:
Q: Station 1+100 Station 1+120 Station 1+140 Station 1+160 Station 1+180 Subgrade Cross Sections for…
A:
Q: what is the moment at point O
A:
Q: A symmetrical parabolic arch of span 20 meters and rise 5 meters is hinged at the springing. It…
A:
Q: structures method of sections algebra,geometry and trigo
A: Consider Moment equilibrium at point D Fy*18 = 13*6+9*x tan50 = x6 x = 6*tan50 x = 7.15' Now Fy*18 =…
Q: What are comm
A: A hydric soil is defined as a soil, in its undrained condition,is saturated, flooded, or ponded long…
Step by step
Solved in 3 steps with 2 images
- 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.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.
- Please calculate the theoretical OD, 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.Poorly treated municipal wastewater is discharged to a stream. The river flow rate upstream of the discharge point is Qus = 8.7 cubic meters per second. The discharge occurs at a flow of Qd = 0.9 cubic meters per second and has a BOD concentration of 50 mg/L. Assuming that the upstream BOD concentration is negligible. (a) What is the BOD concentration just downstream of the discharge point, after mixing? (b) If the stream has a cross-sectional area of 10 square meters, what would the BOD concentration be 50 km downstream? BOD is removed with a first-order decay rate constant equal to 0.20/day.At the point of mixing of a river and a wastewater point discharge, DO is 5.5 mg/L and DOs is 10.1 mg/L. Upstream, the BODu of the river is 3.2 mg/L and its volumetric flow rate is 3.2 m3/s.a) Calculate the maximum allowable volumetric flow rate of the wastewater dischargeif the maximum allowable BODu at the mixing point is 20.0 mg/L. The BODu of the wastewater is 250.1 mg/L.b) For a water temperature of 15 ℃, calculate kd and kr. At 20 ℃, kd is 0.30 per day. The combined stream and wastewater velocity and depth are 2.0 m/s and is 4.0 m.c) Calculate the critical time in days and critical distance in km.d) Calculate the maximum deficit and minimum DO in mg/L
- 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.A wastewater treatment plant will receive a flow of 30,000 m3/day. The plant has a 3.6 m deep circular primary clarifier with a surface overflow rate of 60.0 m3/m2-day.a. Calculate the surface area (m2), diameter (m), volume (m3), and hydraulic retention time of the primary clarifier.b. How long will it take a 1.0 mm particle with a density of 1500 kg/m3to settle in the primary clarifier? show all workThe DO in the wastewater of a tannery is 1.0 mg/L and the corresponding wastewater flow is 0.280 m3/s. What is the DO after mixing of the tannery wastewater with the Salmon Creek if the flow rate of the Salmon Creek is 0.877 m3/s and the DO in the Salmon Creek just upstream of the tannery is 8.5 mg/L?
- Wastewater that has a volumetric flow rate of 0.4 m3 /s and an ultimate BOD of 25.0 mg/L is flowing into a river that has a volumetric flow rate of 4.0 m3 /s and an ultimate BOD of 2.0 mg/L. The dissolved oxygen content for the wastewater and the river is 0.80 mg/L and 8.0 mg/L, respectively. What is the dissolved oxygen concentration just after mixing? If the temperature of the river is 17oC, what is the initial deficit?A primary clarifer removes 35% of BOD5 and 55% of suspendedsolids from the incoming wastewater. Calculate the mass of solidsand mass of BOD5 removed in kg/d for a plant processing 4500 m3/dof wastewater with 275 mg/L BOD5 and 400 mg/L SS.Assume that taal lake is 100m2 and its average height is 5ft. Wastewater thatflows into the lake are the following: a. Food square kitchen waste 5m3/hr; Total Dissolved Solids (TDS) is 50g/L whichoperates 8hrs per dayb. CIH 5m3/hr kitchen waste; TDS is 20mg/L which operates 4hrs per dayc. PCH 20m3/day diluted laboratory waste ; TDS = 40mg/L (1)Determine the volume of wastewater which taal lake can still be contained withoutrainfall.(2)During operational hours a heavy rain fall, the rain gauge reading is 1.5m. Will the taalLake overflow? What is the volume of water that will over flow?(3). Compute the TDS concentration of the overflow.