If the 3-day BOD (BOD3) of a waste is 100 mg/L & the BOD decay constant, k is 0.345 per day, its ultimate BOD is ____ mg/L.
Q: As shown in the figure below, determine the internal loadings at point C. B 0.1 m 0.5 m C A -0.75 m ...
A:
Q: A force F produces a moment of (“[D]"x3) N-m clockwise about point O and (“[B]"x2) N-m counter-clock...
A:
Q: 2 kN - m B 2 m 2 m
A:
Q: The diameter of the holes in the connection below is 20mm. The steel plate is made up of 10mm x 250m...
A:
Q: A C8X11.5 single channel section is bolted to a gusset plate with M22 bolts. Assume A36 steel, 5.6mm...
A: Given:- A C8×11.5 single channel is bolted to a gusset plate The diameter of the bolts = 22 mm The s...
Q: please draw normal, shear , and bending moment diagram for this (reactions are already calculated in...
A: The given diagram is shown below, To determine Draw the Shear force and bending moment diagram
Q: Please show complete solutions. Neglecting the weight of the members and assuming that the trusses ...
A:
Q: 7. The liquid in Fig. D has a specific gravity of 1.50. The gas pressure is P = +5.xy Ib per sq in. ...
A:
Q: Example 2 What is the volume of air needed to burn 1000 m' of gaseous fuel containing methane 30%, h...
A:
Q: In a certain situation it was estimated that 25% of the braking force was applied to the rear brakes...
A:
Q: Determine the Maximum absolute shear from the shear diagram. Attach here the shear diagram and compu...
A:
Q: ALL PROBLEMS, DETERMINE To FOR THE AFD, SFD, AND BMD MAKING SURE SHOW ALL WORK REQUIRED To OBTAIN EA...
A:
Q: -30-mm diameter 250 mm -50-mm diameter 300 mm C
A:
Q: A pontoon bridge is constructed of two longitudinal wood beams, known as balks that span between adj...
A: Given: The uniform floor load is 8 kPa. The length of chesses is 2 m. The length of balks is 3 m. Th...
Q: The declination at a point Q is 3* 15 east. The true bearing of a line QR is S 30* 30' W. The magnet...
A: To find magnetic bearing of line
Q: Determine the following using Slope Deflection Method. W1 P W2 A B X1 X2 X3 X4 Given: X1 = 4 X2 = X3...
A:
Q: Perform a cantilever method to determine the force and moment of the three-storey frame given below....
A:
Q: Solve for the reaction on the beam loaded as shown below Substitute: D=72 "[B]" N B=465 "[D]" N/m 17...
A:
Q: 7-7. Determine the equations of the elastic curve for the beam using the x and x2 coordinates. Speci...
A: Given : Single overhang beam with load P Maximum deflection using double integration method
Q: A For determination of slope, a unit couple is placed under point of consideration. For determinatio...
A: A) For determination of slope, a unit couple is placed under point of consideration.(TRUE) B)For...
Q: The diameter of the holes in the connection below is 20mm. The steel plate is made up of 10mm x 250m...
A: Given Data; connection below is 20mm; A36 steel
Q: Problem: 5-44. The 10-kg uniform rod is pinned at end A. If it is also subjected to a couple moment ...
A:
Q: PROBLEM 3 A W 14 x 68 having the following properties: Prop. of W 14 x 68 d = 356.62 mm bf = 254.89 ...
A: Please like I can do only part b and part c
Q: For the truss shown, determine the force in members BD, CD, and CE stating whether the member force ...
A:
Q: The overhanging beam shown supports the given ultimate load Wu= 5okN/m. The section is 300mm by 500m...
A:
Q: * 53% 4 7:48 PM Tue 8 Mar + : Oil flows into the pipe at A with an average velocity of 0.2 m/s and t...
A:
Q: Determine the force of the members CF and CG. 2 kN 2 m В 2 m C 2 m A G SN kN 3 m F E
A: Given reference is used a method of section In which section is cut in such a way that it pass thro...
Q: Given data : Mass=3 kg height=3 m g=10 m/s2 Determine potential energy
A: Introduction : The question related with mechanics . In this question we have to determine the value...
Q: 5. The liquid in Fig. D has a specific gravity of 3.xy. The gage pressure P, = 10.xy Ib per sq in. a...
A:
Q: pls answer with solution choices: in kg/m3 490 8050 77000 7850
A:
Q: Determine the additional longitudinal reinforcements (mm?) due to torsion of a rectangular beam with...
A: To find : Additional reinforcement in mm2
Q: 2. The driver of a vehicle travelling at 80kph upgrade requires 9m. less to stop after he applies th...
A: Given- Speed = 80 kph Coefficient of friction between the tires and the pavement = 0.50 To find - B...
Q: 4.24 ±t E G j4 ft 6.12 ft K 4,24 ft 2.12 fH D _31 0.88 45°
A: In this question we have to determine vertical force due to water acting on cylinder /ft its length....
Q: The true bearing of a line AB is S 43* 15' E, and the true bearing of a line AC is N 43* 15 E. The m...
A:
Q: Compute the length of a vertical summit curve having tangent grades of 3% and -3% if the passing sig...
A: n1=+3%n2=-3% Length of sight distance = SD = 160m It has been asked in the question to determine ...
Q: Masonry brickwork has a density of 149 Ib/ft³. Determine the maximum height(FT) of a brick wall if t...
A:
Q: Determine the force of the members CF and CG. 2 kN 2 m В 2 m 2 m A SN kN 3 m F E
A:
Q: The observed interior angles of a triangle are A = 35°14'37", B = 96° 30' 09", and C= 48°15'05". Det...
A:
Q: (1) (2) Tc A B C L1 L2
A:
Q: Determine the force of the members CF and CG. 2 kN 2 m В 2 m 2 m А SN kN 3 m F E
A:
Q: In the figure, a longitudinal hole is bored across the length of a cantilever beam having a rectangu...
A:
Q: NEED IN 1HOUR PLS, THANKS A. A block shown started to moves towards right from its rest. Determine t...
A:
Q: The tangents of a compound curve have the following azimuths, AB = 216°30′, BC = 224°30′, and CD = 2...
A:
Q: A transmission tower shown below is subjected to lateral loads as shown. A =4.7 kN, B =6.2 kN, C =7...
A:
Q: The specific gravity of a liquid is 0.75. What height (in m) of that liquid is needed to provide a p...
A: Specific gravity of liquid = 0.75 Pressure difference = 30psi To find out the height of liquid for p...
Q: A rectangular scow 9m wide, 15m long, and 3.6m high has a draft in seawater 2.4m. G is located 2.7m ...
A:
Q: A beam with rigid support at A, pin connection at C and roller at D has the geometry and loads as sh...
A:
Q: A two-axle carriage truck moves along the simply supported girder AB. The front axle transmits 2200 ...
A: A girder is a sort of beam used in building that is big and deep. It can span longer distances and c...
Q: A Зт бт В
A:
Q: For the truss shown, determine the force in members BD, CD, and CE stating whether the member force ...
A: Determine the force in members BD, CD, and CE stating whether the member force is in tension or comp...
Step by step
Solved in 2 steps with 2 images
- If the 3-day BOD (BOD3) of a waste is 75 mg/L & the BOD decay constant, k is 0.345 per day, its ultimate BOD is ____ mg/L.A river has ultimate BOD of 60 mg/L, a width of 20 m, a depth of 5 m and a flow rate of 9 m3/s. A waste at 20°C having ultimate BOD of 250 mg/L, a decay rate constant of 0.1/day, and flow rate of 1 m% is discharged into the river. The river and the waste are at the same temperature of 20°C and contain the same pollutant (same decay rate constant). If there is instantaneous mixing of the waste in the river, determine:a. Ultimate BOD in the river immediately after mixing of the waste mixed with the river. b. The value of BOD in the river five days after mixing of the waste with the river. c. BOD concentration in the river at 50 km downstream from the point of discharge.d. BOD removed at 95 km downstream from the point of dischargeA waste of 600 m³/hr flow rate with an ultimate BOD20 = 140 mg/l is to be treated in an activated sludge process to yield an effluent of 20mg/1 BOD5 and 25mg/1 suspended solids. For the reactor the detention time = 6 hrs, sludge age = 10days, under flow SS concentration = 15000mg/l, decay rate = 0.055 day, yield coefficient = 0.65, BOD of the effluent SS =60% of the suspended solid concentration and the solids are 80% volatile. ( k₁, 20 = 0.24 /day) Find: -1- MLSS (mg/l) 2- Recirculation ratio
- A lake has 5×10^9 m³ of water with a DO concentration of 7.5 mg/l. 12000 m³ of an effluent with 120 mg/l BOD is discharged into this lake and 70% of the organic matter is decomposed in 7 days. Find out the DO concentration in the lake after 7 days.You are the lead engineer on a wastewater treatment plant with a biological reactor. You are required todetermine how much biomass will be produced in kg per day in your plant. A junior engineer determines theultimate BOD of the incoming waste as 600 mg/l, with a decay constant of 0.1/d. The incoming substrateconcentration used should be the five-day BOD. The incoming flow is 75 m3/d however there are lossesupstream of the plant accounting for 15 m3/d of the flow. The target BOD discharged from the plant is 25mg/l. the kinetic constants for the system are Ks = 90 mg/L BOD5, kd = 0.2 d-1, μm = 1.5 d-1, and Y = 0.6 mg VSS/mgBOD5. Include a sketch to illustrate the biological reactor and its incoming flows.Some waste has a five-day BOD at 20 ̊C equal to 210 mg/L and an ultimate BOD of 350 mg/L. Find the five-day BOD at 25 ̊C. Note, reaction rate coefficients can be adjusted for temperature using the Arrhenius equation, which is kT2 = kT1h^(T2-T1), where h is 1.047 typically.
- A sample of water at pH 10.5 has 36 mg/L of CO3-2 and 26 mg/L of HCO3-Including the contribution of [H+] and [OH-], find the alkalinity as CaCO3.A stream containing no biochemical O2 demand (obviously a hypothetical situation) has a DO of 5.00 mg/L and a flow rate of 8.70 m3/s. The temperature of the stream is 15 degrees Celsius. The average velocity in the stream is 0.174 m/s. The average depth is 5 m. Determine the reaeration coefficient and the rate of reaeration.Advection, diffusion, and reaction in a channel Approximately 50 m3 of an agricultural pesticide with an initial concentration of 1.6 × 105 mol/m3 have been spilled into a stream following a train derailment. You have been called in to predict the aqueous concentrations of this pesticide at various points along the stream, and the mass that will be delivered to a lake with critical habitat 70 km downstream. You look up the main component of the pesticide and see that it degrades in water (due to hydrolysis reaction) with a half-life of 1.9 h. The discharge rate of the stream is 75,000 L/min. It has an average depth of 0.3 m and an average width of 1.2 m. a. Calculate the maximum concentration (in mol/L) of the pesticide that will be observed at a town 10 km downstream and at the point where the stream reaches the lake, 70 km downstream. Assume a sheer velocity of 0.40 m/s. b. Plot the concentration of this pesticide entering the town and the lake with time. Care should be taken when…
- Given the following data: Weight of a dish = 55.8633 g, 200mL of sample is placed in the dish and evaporated. New weight of dish and dry solids = 55.8856 g. The dish is placed in a 550°C furnace, then cooled. New weight = 55.8700 g. Find the total, volatile, and fixed solids.Can you please help me in answering this question. thank you A river, flowing at 1.5 m3/s, is polluted with the pesticide permethrin and flows into a lake (100 m x 100 m 2.5 m). The steady state concentration of permethrin leaving the lake is 1.4 ppm and the average cross-sectional area of the river is 2.7 m2. The half-life of permethrin in this environment is 19 hrs. What is the concentration of permethrin entering the lake and what distance downstream of the outlet would the concentration be less than 1 ppm?Aluminum pieces inadvertently collect on the filter. a. If left on the filter, will the percent yield of the alum be reported as too high or as too low? Explain. b. If the aluminum pieces are detected on the filter, what steps would be used to remedy the observation? Explain.