Determine which method will accomplish the job in the short

Assignment Help Civil Engineering

Reference no: EM13560294

Given: A tank with a volume (?) of 5,000 gal contains salt solution at an initial concentration (C0*) of 70,000 mg/L, but the concentration in the tank (C) needs to be reduced to 500 mg/L. Two approaches are being considered as indicated below (Alternatives 1 and 2).

Alt. 1: Flush tank with clean tap water while tank is mixed. Flowrate into the tank (QIn) and flowrate out of tank (QOut) are each 40 gpm (both flows are limited by the drain pipe capacity). If you do not derive equations used (which is not required), identify the source of the ones used with specificity; Define all variables used.

Alt. 2: First decant a portion of the salt solution at a flowrate (QOut) of 40 gpm, then replace the decanted volume with clean tapwater at a flowrate into the tank (QIn) of 100 gpm.

Required: a) Determine which method will accomplish the job in the shortest time.

b) Determine the difference in clean water used/ wastewater generated (gal.) by each method.

c) Of course our time is valuable and the importance of accomplishing the task quickly is obvious. Rather than discussing time, discuss, from the standpoint of sustainability, the importance of:

1) conserving (not wasting) clean water, and

2) minimizing the generation of waste brine (salty water) in the Central San Joaquin Valley.

Be thoughtful; Simplistic answers will not receive much credit. Include in your discussion:

the long-term outlook of groundwater reserves in the Central Valley

the challenges we face with respect to disposal of waste brine solution; what are the legal ways of doing this in the Valley? Note that it would not be legal to put brine in the sewer or percolate it into the ground due to the negative impact both would have on the groundwater.

Reference no: EM13560294

Questions Cloud

What is the specific heat of the unknown piece of metal : A 100-g piece of metal initially at 100 C is placed in a 250 gof water contained in a 300-g aluminum vessel initially at 20.o C. what is the specific heat of the unknown piece of metal

Business there in the shorter term : How does that impact your ability to do business there in the shorter term?

What would your answer be if the refrigerant were first : Saturated refrigerant-134a vapor at 20 psia is compressed reversibly in an adiabatic compressor to 120 psia. Determine the work input to the compressor. What would your answer be if the refrigerant were first condensed at constant pressure before it ..

Compute what is actual direction of the sun : An underwater scuba diver sees the Sun at an apparent angle of28.0° from the vertical. What is actual direction of the Sun

Determine which method will accomplish the job in the short : First decant a portion of the salt solution at a flowrate (QOut) of 40 gpm, then replace the decanted volume with clean tapwater at a flowrate into the tank (QIn) of 100 gpm.

Volunteer water metering in the city of richmond : Volunteer Water Metering in the City of Richmond

Why and how the material is important : Why and how the material is important and relevant to the course content; and

Determine the dimensions of the best hydraulic trapezoidal : Determine the dimensions of the best hydraulic trapezoidal concrete channel section to convey water at a rate of 2200 gal per min on a channel slope of 0.015 m/m.

How much time have you got to move equipment from the top : You are in charge of the construction site of a new dam. Extremely heavy rainfall starts and Bureau of Meteorology hydrologists tell you that beginning at about 8 AM, 2 GL per hour (2 x 106 m3 per hour) will flow into the dam. The lake behind the dam..

User Account

All Pages