If the 3-day BOD (BOD3) of a waste is 75 mg/L and the BOD decay constant, k, is 0.345 day-1 , what is the ultimate BOD?
Q: what is the smallest clearance from the top of the tank so that the truck can pass under the bridge
A: This question is from civil engineering
Q: Consider a steady blood flow through an idealized stenosis, as shown in the figure below. The vessel…
A:
Q: USE SLOPE DEFLECTION METHOD. From the indeterminate beam shown, find the fixed end moment at A,…
A:
Q: Change the following sentences into the negative and the interrogative forms: 1. Salam is a…
A: Asked: To transform the given sentences to the negative and interrogative forms. Negative…
Q: EXAMPLE 3: (EX. 10.2 HEAD LOSS FOR LAMINAR FLOW) Oil (S = 0.85) with a kinematic viscosity of 6 X…
A: Calculate head loss for a given fluid and water?
Q: 4) A simply supported beam supports the uniformly distributed load of intensity Wo. Determine the…
A: Let Ra and Rd be the reactions at A and D Supports Considering equations of equilibrium, Ra + Rd =…
Q: Fill out the differential leveling table with corresponding calculations (page check, misclosure,…
A: Fill out the differential leveling table with corresponding calculations (page check, misclosure,…
Q: A line is recorded as 472.90 m long. It is measured with a 0.65 kg tape which is 30.005 m long at…
A: Asked: To determine the true distance of a line measured using tape. Given: Recorded length of the…
Q: Q- A raft foundation 1Om wide and 12 m long is to be constructed in a clayey soil having shear…
A: given- width B=10 mLength L=12 mshear strength C=12 kN/m2unit weight γ=16 kN/m3overburden…
Q: 24-h traffic count at a road section was observed to be 1000 vehicles on a Tuesday in the month of…
A: given- 24-hr traffic count=1000 vehdaily adjustment factor=1.121monthly adjustment factor=0.913
Q: uation 6: A W18x97 simply supported beam carries a uniformly distributed load. The prope ction…
A: 998 kNm
Q: 2) A single axle load of P = 20 kN is to cross a simply supported beam made of four 50mm x 250mm…
A:
Q: 4. A push of 180 N and pull of 350 N act simultaneously at a point. Find the resultant of the…
A: Push = 180N pull = 350 N angle b/w = 135 degrees
Q: 3) An overhanging beam is loaded as shown in the figure. Using EI = 20.48x106 N-m², determine the…
A:
Q: The strain components Ex, Ey, and Yxy are given for a point in a body subjected to plane strain.…
A:
Q: b 7'
A:
Q: A tripod plotted in a 3-D coordinate system is supporting a downward vertical load of P = 443 kN at…
A: GIVEN: A tripod plotted in a 3-D coordinate system is supporting a downward vertical load of P = 443…
Q: Q2. A rigid bar AB is supported by a hinge at A and by a steel wire T as shown. With no load applied…
A:
Q: e properties of five different pozzolans: Ground blast furnace slag, Silica Fume, Class F fly ash,…
A: Pozzolans, a large class of siliceous and aluminous minerals, are chemically reactive with calcium…
Q: Q8) Calculate the adjusted coordinates of all stations in the following traverse given that the…
A: Assuming the coordinates of origin station Q as (x,y) = (1000,1000). GIVEN Length and Bearing of…
Q: Following is the population of a city as obtained from the census records. 2000 2010 21,400 32,800…
A:
Q: What will be the proper pavement to use when the traffic loads consist of heavy trucks or wheeler…
A: We mostly use two types of pavements viz, Flexible pavement and Rigid pavement . Both have their…
Q: A W27×94 section of A572 Grade 50 steel 34 feet long, it is used as a simply supported beam. It is…
A: Given Data A W27×94 section of A572 Grade 50 steel Length of the section is 34 feets The factored…
Q: = Q2) A board 1 m by 1 m that weighs 25 N slides down an inclined ramp (slope 20°). The board is…
A: ###Calculation of constant sliding velocity in cm/sec of this board###
Q: wo cables BC & BD are pull out the ship as shown in Fig. (6), if the diameter of each cable is 50…
A:
Q: A pump can lift water at a discharge of 0.15m³/s to a head of 25 m. The critical cavitation number…
A: Given data:- The given Discharge, Q=0.15 m3/s The critical cavitation no, σc=0.144 The barometric…
Q: Q1: for the traverse in the table below: 1- Draw a sketch 2- Balance the angles 3- Compute the…
A: Disclaimer “Since you have posted a question with multiple sub-parts, we will solve the first three…
Q: describe how does the construction of dams affect the availability of water?
A: Individuals benefit from dams since they are made. Unfortunately, the administration of water, as…
Q: 6.12 ft Į D 0.88 G_4.24 ft F C K T 12.12 + Xo | A 45° 14 ft 12 1 3 ft 4.24 ft Referring to the…
A:
Q: Determine the moment of resistance of the T beam, 3.6 m.
A: In question , T - beam is provided for which we have to calculate moment of resistance.
Q: The seawall shown below consists of a flat section AB = 3-m with another section, BC, shaped like a…
A: Given values: Sea wall consisting of portion AB and BC as quarter cylinder with radius r= 1 m. Width…
Q: A transition curve is required for a circular curve of radius 210 m and the gauge is 1.4 m. The…
A:
Q: USE SLOPE DEFLECTIO METHOD. From the indeterminate frame shown, find the moment at C acting in M…
A:
Q: A constant-head test was conducted on a sample of soil 15 cm long and 60 cm² in cross-sectional…
A:
Q: C. COMPUTATIONS: (Show computations on the computed stadia intercept, horizontal, vertical, and…
A: Given, K= 100 HI= 1.395m Elevation at A= 100m
Q: Prob. 2.7-6. A pipe flange is attached by four bolts, whose effective diameter is 0.425 in., to a…
A: Note : Neglect the friction between pipe flange and concrete base. The Average shear stress is given…
Q: Q. 2 Determine the slope at the supports of the beam shown in Fig. I using the conjugate beam…
A: Given data E = 29000 ksi I = 1000 in2
Q: Determine the x and y components and the resultant of the forces 250 kN 512 20% 280 KN -Y 40° 300 KN…
A:
Q: USE MOMENT DISTRIBUTION METHOD. Given the indeterminate beam, find the reaction at B in kN. EI is…
A: Find reaction at B in KN
Q: What is the importance of Sieving in the Construction Industry? What is aggregate grading and what…
A: Sieve analysis is done to find the gradation of particles which can be further used in the design of…
Q: A company is planning to expand its business after 5 years from now. The expected money required for…
A: Given, Money required after 5 years=$ 5,00,00,000amount company can invest at the end of every year…
Q: The moment of the force is the product of the force and the perpendicular distance of the axis and…
A:
Q: 21. For the figure below, the specific gravity of unknown fluid is equal to a. 1.271 b. 1.35 C. 2.25…
A:
Q: USE MOMENT DISTRIBUTION METHOD. Given the indeterminate beam, find the moment at A, MAB, in kNm. El…
A: Find Moment at A (MAB) = ? Using Moment distribution method
Q: SITUATION. A steel pipe of internal diameter 799 mm and of thickness 2 mm has to be slipped on to a…
A:
Q: The following data are the cross section notes at station 12+046.58 and 12+066.58. The natural…
A: (A) A= 20.25 m2 (B) A= 12.8 m2 (C) VC-VF= 70.3 m3
Q: he maximum acceleration of a particle moving with simple harmonic motion is
A: We knowr=AcosωtVelocity isvt=r't=-Aωsinωtso
Q: USE MOMENT DISTRIBUTION METHOD. Given the indeterminate beam, find the moment at B in span BC, MBC,…
A:
Q: Define, compare and contrast terms saturated and unsaturated hydraulic conductivity and explain…
A:
Q: Q4) Given the following data: RL of the floor = 100.595m, staff reading on the floor =1.795m,…
A: Given:- The reduced level (R.L) of the floor = 100.595 m The staff reading on the floor = 1.795 m…
Step by step
Solved in 2 steps with 2 images
- 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.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.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 discharge
- 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.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?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.
- Some waste has a five-day BOD (biochemical oxygen demand) at 20 oC , equal to 210 mg/L and an ultimate BOD of 350 mg/L. Find the five-day BOD at 25 oC.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 reservoir of liquid waste has a mass of 1200 kg and volume of 0.952 m3. Find its : i. Weight ; ii. Density ; iii. Specific weight and; iv. Specific gravity
- If the BOD4 of a waste is 200.0 mg/L and the ultimate BOD is 270.0 mg/L, what is the rate constant at 10⁰C.6 Ydu will obtain 2.0 L of tap water for you water hardness test. The water hardness test uses a precipitation reaction to precipitate the Calcium bicarbonate present out of solution by adding 1.9 g of Ca(OH) represented by the following equation: Ca(HC03|21ag) + Ca(OH)215) > 2CaCOsisi + 2 H20 ml What is the percent yield of CaCO3 produced in the hard water test? (fig. 4)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…