What will be the steady-state effluent concentration

Assignment Help Civil Engineering
Reference no: EM13561632

A water treatment plant treats a continuous flow rate of 50,000 m^3/day and plans to build a 10,000 m^3 tank to house an additional treatment process. The reaction occurring in the tank will remove nitrate according to first order decay with a rate of 0.25 per hour (12 hrs/day). The influent concentration of nitrate is 50 g/m^3.

a) What will be the residence time of the tank?

b) What will be the steady-state effluent concentration of an ideal CSTR?

c) What will be the steady-state effluent concentration of two equally-sized (5,000 m^3 each), ideal CSTR's in series?

d) What will be the steady-state effluent concentration for an ideal PFR? Assume dimensions of length = 500m, cross sectional area of flow = 20 m^3

Reference no: EM13561632

Questions Cloud

What is the maximum exiting velocity and what is the maximum : A fireman reduces the exit area on a nozzle so that the velocity inside the hose is quite small relative to the exiting velocity. What is the maximum exiting velocity and what is the maximum height the water can reach if the pressure inside the hose ..
Determine the moment of all cable forces about point a : Structure O A B C is built in at point O and supports forces from two cables. Cable E A D passes through a frictionless ring at point A, and cable O C G passes through a frictionless ring at point C. If the force in cable E A D is 800 lb and the forc..
Determine head loss through this pipe section : A pipe carrying oil of specific gravity (SG = 0.877) changes in size from 150 mm at section E to 450 mm at section R (E and R are arbitrary designations of the two points in the system).  Section E is 3.66 m lower than R
Take the casing wall to have an outer diameter : Batteries in a flashlight must be held in electrical contact even though the outer plastic housing expands differently than the battery and terminals. This is accomplished by having a compliant spring compressed as the cover is screwed on the flashli..
What will be the steady-state effluent concentration : A water treatment plant treats a continuous flow rate of 50,000 m^3/day and plans to build a 10,000 m^3 tank to house an additional treatment process. The reaction occurring in the tank will remove nitrate according to first order decay with a rate o..
Determine that a building solution complies with performance : In accordance with BCA, what are the assessment methods and how may they be used to determine that a building solution complies with the performance requirements?
How many square feet of compacted cy are placed per hour : Earth whose in situ weight is 110 lb per cf and compacted weight is 124 lb per cf is placed ina a fill at rate of 280 cy per hr, measured as compacted earth. The thickness of the compacted layers is 8 in
Compute the coefficient of permeability of the soil in : Standard air is drawn from the atmosphere into a 1.25 m diameter cylindrical duct by a fan mounted inside the duct. This air is discharged down stream from the fan through a 0.6 m diameter duct at a velocity of 25 m/s and atmosphere pressure.
What is the force if the fire fighter is running towards : The water exiting a 2.5 cm diameter nozzle which is atrtached to a 7.6 cm diameter fire hose is discharged at a velocity of 25 m/s. the pressure in the hose is 380 kpa. what is the magnitude and direction of the force of the water n the nozzle, if th..

Reviews

Write a Review

Civil Engineering Questions & Answers

  Determine the normal and friction forces acting on each side

The photograph shows two U.S. Coast Guard icebreakers in an ice field, and a simple model for an ice breaking operation. If the coefficients of static and kinetic friction

  Determine the horizontal and vertical components

A 2ft diameter hemispherical plexiglass "bubble is to be used as a special window on the side of an above-ground swimming pool.

  Determine required diameter of each rod by the concrete

The column is constructed from high-strength concrete and four A-36 steel reinforcing rods. If it is subjected to an axial force of 37.5 kN , determine the required diameter of each rod so that one-fourth of the load is carried by the concrete

  Which machine should be chosen using an interest rate

North City must choose between two new snow-removal machines. The SuperBlower has a $70,000 first cost, a 20 year life, and an $8000 salvage value. At the end of 9 years , it will need a major overhaul costing $19,000.

  Compute the flow rate in the channel in the jump

A hydraulic jump occurs in a rectangular channel 4.0 m wide. The water depth before the jump is 0.4 m and after the jump is 1.7 m. Compute the flow rate in the channel, the critical depth and the headloss in the jump.

  1- explain about pres-stressed concrete2- explain about

1- explain about pres-stressed concrete2- explain about bridge construction material3- illustrate why sometimes when we

  Explain why a secant touches a circle at one point

1. The three isometric axes are: vertical and two axes 30 degrees from horizontal. 2. Oblique projection is a perspective projection method. 3. Isometric view represents a parallel projection method.

  At what temperature will the rails touch end to end

The steel rails of a continuous, straight railroad track are each 60 ft long and are laid with spaces between their ends of 0.25 inches at 70 degrees F. At what temperature will the rails touch end to end

  Calculate the percentage change in volume based on volume

The natural water content of a saturated soil is 41% and its shrinkage limit = 20%. Gs (sp. gravity of solids) = 2.75. Calculate the percentage change in volume based on its volume at its natural water content if the soil is dried to a water conte..

  Determine the size of the watershed in acres and then

The 1-hr UH in the table was recorded for a particular watershed. Determine the size of the watershed in acres and then convert the 1-hr UH into a 3-hr UH for the watershed.

  Determine the magnitude of the largest elastic load p

the outer diameter of this sleeve is 20 mm, and its inner diameter is 10 mm. if the yield stress for the steel is (sy)st = 640 MPa, and for the bronze (sy)br = 520 MPa determine the magnitude of the largest elastic load P

  Determine force acting on the sluice gate

The flow rate of water through a 8 meter wide channel is controlled by a sluice gate. The flow depths are measured to be 1.3 and 0.45 meters upstream and downstream from the gates. Determine force acting on the sluice gate

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd