Q2) A: Wastewater treatment plant use one circular primary clarifier to treat 10000 m/day of wastewater contain 210 mg/l of BOD and 260 mg/l of SS. the removal efficiency in this clarifier is 35% for BOD and 60% for SS when the surface over flow rate is 60m/m².day and the detention time is 2hr. Estimate the following: 1. The dimensions (diameter and depth) of this clarifier. 2. The mass of solids removed in the clarifier. 3. The effluent concentration for BOD and SS. 4. Mass of solids going to the secondary clarifier.

Q: Consider a 1000 m^2 impoundment, 1 m deep. Benzene is present at 100 micrograms/L when the wind…

A: Given that, Area of impoundment, A=1000 m2  Depth, h=1 m Speed of wind over surface, u=2 m/s…

Q: 8. A rotary drum filter with 35% of its filtering area submerged in the slurry, turns at 0.5 rpm.…

A: 8) Given, The area of the filter is 35% of the filter cloth. AF = 35%ACAF= 0.35AC     ......1…

Q: Question 2 Find the permeability of core sample were data obtained by using air as shown below:-…

A: Given :flow rate:   of air downstream in  at standard conditions (baseline).Pressure upstream side…

Q: For a monosized media filter with a particle size of 2.5 mm in diameter, a bed depth of 2 m and…

A: Given data: Diameter of particle = 2.5 mm Depth of bed = 2 m Porosity = 20 % Water temperature = 15…

Q: In the filtration of a certain sludge, the initial period is effected at a constant rate with the…

A: Given data: Pressure = 400 kPa Time for constant pressure filtration = 900 s Filtrate obtained…

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A:

Q: Question 1 (a) Size a horizontal high pressure separator for the following condition: Gas Flow Rate:…

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Q: A diluted suspension contains food particles with a diameter of 5x10-2 mm, which are to be extracted…

A:

Q: A column of D diameter and L m length contains spherical particles of spgr-p and dp mm diameter.…

A: Diameter of column=34cm=0.34 mLength of column L= 2.33 mSpecific gravity of particle sp gr=…

Q: A wind (atmospheric air) at 5 m/s flows parallel to the surface of a container containing ethyl…

A: Given data: Velocity of air = 5 m/s T = 293 k p = 1 atm Distance from leading edge = 0.5 m

Q: - Problem 1: The syringe shown in the figure below contains cell culture medium (p = 1.02 g/cm³). If…

A: Volumetric flow rate- a volumetric flow rate is the amount of a gas or liquid that moves over a…

Q: Determine the surface area required for a rectangular settling tank for a wastewater flow rate of…

A: The surface area required by the rectangular settling tank for the given flow rate of wastewater is…

Q: Air at 1 atm and 400 K and with a velocity of U∞o = 10 m/s flows across a compact heat exchanger…

A:

Q: In the table below are shear stress and shear rate data for three bottles of syrup (simply…

A: In the above question shear stress vs shear rate data are given. We have to find the Non Newtonian…

Q: A combustion unit is burning RDF consisting of 85% organics, 10% water, and 5% inorganics (inerts)…

A: Given A combustion unit -85% organics, 10% water, and 5%inorganics  Feed rate=1000 kg/h Heat value…

Q: A continuous gravity decanter is to separate nitrobenzene of density 75 lbm/ft3 from aqueous was…

A: Density of nitrobenzene (ρn) = 75 lbm/ft³  Density of aqueous (ρb) = 64 lbm/ft³  Total depth for…

Q: During a run, the air flow is at 115 SCFH. The digital analyzer indicates 8.2% Carbon dioxide at the…

A: Givenair flow rate=115 SCFH (standard cubic feet per hour)CO2 content at the inlet=8.2%To findFlow…

Q: 1- A current of 15 A was passed through a copper sulfate solution for 10 min. (a) what weight of…

A: Current, I = 15 A time, t = 10 min = 10 x 60 = 600 sec a) from Faradays law , Cu2+ deposited  =…

Q: The initial test suspension height was 40 cm with a solids concentration of 0.10. What is the…

A:

Q: A pressure difference of 2.40 x 10 Pa is used to inject a sample onto a 64.2 cm long capillary that…

A: It is given that,pressure difference, ,length of capillary, ,diameter, viscosity of the sample,

Q: Q8- Homogeneous horizontal soil column in the state of stable, unsaturated flow, 50 cm long, with…

A: To find the values of the factors α and β in the function K(Ψ) = αeβΨ, we can use the provided…

Q: Flow rate = 1000 cc of air at 1 atm abs. 70 °F in 600 sec Pressure, downstream side of the core =1…

A: Permeability is an intensive property of fluid which indicates or measure the capacity of medium to…

Q: 1. A flow rate of 16 m/(m² h) is maintained through a 0.6-m-deep bed of filter sand. The sand is…

A: Given: Velocity in bed V = 16 (m3/m2.h) = 16 m/h = 163600m/s = 0.0044 m/s diameter d = 0.4 mm =…

Q: 2. Ethanol at 273.15 K is flowing on a 2-boundary set-up. The top plate is moving at a rate of 20…

A: The shear rate is the ratio of the velocity of the upper plate and the thickness of the film. The…

Q: 1. Calculate the volumetricflowrate of the siphon (cm³/s), assuming thatL=100cm, Az = 80 cm, and…

A: 1. Siphoning  Given:  Tube Diameter= 2mm                   ∆Z=80 cm                      L=100 cm…

Q: Estimate the washing time

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Q: A 14-m-long settling chamber with a height of 2.5 m operates at a horizontal gas velocity of 1 m/s.…

A: Given data: Height of settling chamber = 2.5 m Length of settling chamber = 14 m Gas velocity = 1…

Q: In the filtration of sludge, the initial period is affected at a constant rate with the feed pump at…

A: Let the time for the constant rate filtration period be t1 and the volume of filtrate collected in…

Q: The energy distribution in the boundary layer over the free of a spillway was observed to be :…

A: Free stream velocity = 25 m/s Boundary layer thickness  δ = 40 mm = 0.04 m u/U = (y/ δ)0.12

Q: The wastewater treatment process at a polymer plant consists of a longitudinal bio-remediation pond…

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Q: Example(1-14): mixture gas and liquid flow through 0.02 m inside diameter pipe at total flow rate of…

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Q: 14. A bubbly mixture of gas and liquid flows up a vertical glass tube with an internal diameter of…

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Q: и Q.2) A gas being transfer across a stagnant air layer at a total pressure of 150 kN/m2, at one…

A: Step 1:   Step 2:Step 3: Step 4:

Q: How much leaching water is needed to reduce the salinity of a clay loam soil that is 2 feet deep…

A: Depth of the clay loam soil, DS = 2 ft Initial salinity of the soil, ECe,i = 4000 mg/kg Final…

Q: At 1 atm pressure and 20C temperature, the viscosity coefficient of Cl2 gas is 147x10-7 kg.m / s.

A: Pressure = 1 atm Temperature = 20oC Viscosity of Cl2 = 147 * 10-7 kg.m/s

Q: PDO engineers and technicians are trying to solve the problem of fouling in heat exchangers. With…

A: The deposition and accumulation of unwanted material such as scale, suspended solids, insoluble…

Q: For a flow of 0.6 m³/s, how many rapid sand filter boxes of dimensions 10m x 20m are needed for…

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Q: Multiple Choice (Select 1 out of 4 options, for the question below. ) Consider the diagram given…

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Q: If the natural gas flow rate is 120 MMSCF/Day in a gas pipeline, NPS 20 with 0.25 in wall thickness,…

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Q: An engineer suggests the following design parameters for a city's proposed rapid sand filter: flow…

A: Flow rate, Q = 0.6 m3/s Loading rate to filter, LR = 125.0 m3/day.m2 The maximum surface area of…

Hazard Analysis and Design in Chemical Engineering

Hazard is the intrinsic property of a material or process which harms the people, buildings, or environment. Health, safety, hazard, risk assessment, loss prevention, and environmental consideration play an important role while designing a chemical processing plant. Hazard is often confused with risk. Risk measures the magnitude of loss and injury of likelihood incidents or the consequence and frequency of incidents.