How can goal setting help with academic performance?

A completely mixed activated-sludge plant is being designed for a wastewater flow of 5.0 MGD. The soluble BOD concentration of t

Bond [772]

Answer:

a) 154054 gals

b) 20850 lb/day

c) 0.7392hr

d) 2.466day^-1

e) 7.23 lb/day-1000 ft^3

Explanation:

a)

$Vx = \frac{Qy(So - Se)}{1+kdQc}= \frac{5x10^{6}(0.6)(200-10)}{1+0.06(8)}=154054 gals$

b)

Dry mass = 5 MGD * (0.20) * (2500 mg/l) * 8.34 = 20850 lb/day

c)

Aeration period Q = $\frac{V}{Q} =\frac{154054}{5x10^{6} } =0.0308day=0.7392hr$

d)

$\frac{F}{M} =\frac{Q(So-Se)}{Vx}=\frac{5x10^{6}(200-10) }{154054(2500)}=2.466day^{-1}$

e)

BOD loading = $\frac{8.34(5)(200)}{154.054(7.48)} = 7.23 lb/day-1000 ft^{3}$

Hope this helps!

6 0

3 years ago

What is the entropy of a closed system in which 25 distinguishable grains of sand are distributed among 1000 distinguishable equ

Veronika [31]

Answer:

S = 172.69 J/K

Explanation:

For a closed system, the entropy is given as the natural logarithm of microstates.

The number of particles (grains of sand); N = 25

The number of boxes (compartments); M = 1000

Entropy is the logarithm of number of microstates; Thus,

S = In ψ

However, the number of microstates is given by the formula;

ψ = Mⁿ

Thus, S = In Mⁿ

Plugging in the relevant values to obtain;

S = In (1000)^(25)

S = 172.69 J/K

7 0

3 years ago

Read 2 more answers

A 200-L tank (see Fig. P4.107) initially contains water at 100 kPa and a quality of 1%. Heat is transferred to the water, thereb

Tomtit [17]

Answer:

25.46 MJ

Explanation:

continuity : m3 - m1 = -m<em>e</em>

<em>Energy Equation: m3u3 - m1u1 = -meue + 1Q3</em>

<em />

<em>See the image attached (Well typed out format)</em>

5 0

4 years ago

A permanent magnet DC motor has an armature resistance of 0.5 Ω and when a voltage of 120 V is applied to the motor it reaches a

BaLLatris [955]

Answer:

12 N-m

Explanation:

The dc motor is operating at 24 V that is its terminal voltage V =24 V

Armature resistance = 0.2 ohm

No load speed = 240 radian /sec

For motor we know that as the motor is on no load so so

Power developed in the motor

Now we know that power = torque× angular speed

So

3 0

4 years ago

the uniform bar (mass m and length l ) is leaning against a wall. the coefficient of static friction between all surfaces and th

zaharov [31]

The coefficient of static friction is the ratio of the maximum static friction force (F) between the surfaces in contact before movement commences to the normal (N) force.

<h3>What is coefficient of static friction formula?</h3>

The friction coefficient is the ratio of the normal force pushing two surfaces together to the frictional force preventing motion between them.
Typically, it is represented by the Greek letter mu (). In terms of math, is equal to F/N, where F stands for frictional force and N for normal force.
The ratio of the greatest static friction force (F) between the surfaces in contact before movement starts to the normal force (N) is known as the coefficient of static friction.
A body and a surface have static and kinetic friction coefficients of 0.75 and 0.5, respectively. The body is forced to slide with a constant acceleration that is equal to A. g4 by applying a force.

Find the attachment answer.

Learn more about coefficient of static friction refer to :

brainly.com/question/25050131

#SPJ4

8 0

1 year ago