User Account

All Pages

Designing a chlorination system for drinking water

Assignment Help Accounting Basics
Reference no: EM131030922

1. Imagine that you are designing a chlorination system for a drinking water treatment plant. The design flow rate is (1577 m3/hr). You must provide a free chlorine residual of at least 1.0 mg/L chlorine in order to protect against contamination in the distribution system. However, you can not exceed a free residual of 2.0 mg/L chlorine, because you are worried about the formation of disinfection by-products. You are given the following data (graph on next page) for disinfection of Giardia lamblia. The data were collected in a batch reactor, using a free residual C= 1.5 mg/L chlorine.

a. From the graph, estimate the first-order rate constant k(in min-1) for both base 10 and base e.

b. Suppose your chlorine contactor is a well-stirred cylindrical tank. The diameter of the tank is 10 m and the depth (height) is also 10 m. What is the average hydraulic residence time, in units of minutes? If the contactor behaves as a CMFR, how much removal of Giardiawould you get (i.e., what fractional removal)? Hint: be sure to use the proper rate constant kfrom part (a).

c. Now suppose you had three smaller cylindrical tanks. The diameter of each tank is 7 m and the depth (height) of each is also 7 m. Each behaves as an ideal CMFR. You arrange the three tanks in series as shown below. Compare the average hydraulic residence time of the series configuration (i.e., for the water to pass through all three tanks) to the average hydraulic residence time of the larger tank from part (b).

d. Assuming the series configuration, what is the overall removal of Giardiathat you will achieve?

e. Look up the primary standard for disinfection of Giardiaand report it. Do you meet the standard with one large tank (part b)? Do you meet the standard with three small tanks in series (part c)? Why?

1. Imagine that you are designing a chlorination system for a drinking water treatment plant. The design flow rate is (1577 m3/hr). You must provide a free chlorine residual of at least 1.0 mg/L chlorine in order to protect against contamination in the distribution system. However, you can not exceed a free residual of 2.0 mg/L chlorine, because you are worried about the formation of disinfection by-products. You are given the following data (graph on next page) for disinfection of Giardia lamblia. The data were collected in a batch reactor, using a free residual C= 1.5 mg/L chlorine.

a. From the graph, estimate the first-order rate constant k(in min-1) for both base 10 and base e.

b. Suppose your chlorine contactor is a well-stirred cylindrical tank. The diameter of the tank is 10 m and the depth (height) is also 10 m. What is the average hydraulic residence time, in units of minutes? If the contactor behaves as a CMFR, how much removal of Giardiawould you get (i.e., what fractional removal)? Hint: be sure to use the proper rate constant kfrom part (a).

c. Now suppose you had three smaller cylindrical tanks. The diameter of each tank is 7 m and the depth (height) of each is also 7 m. Each behaves as an ideal CMFR. You arrange the three tanks in series as shown below. Compare the average hydraulic residence time of the series configuration (i.e., for the water to pass through all three tanks) to the average hydraulic residence time of the larger tank from part (b).

d. Assuming the series configuration, what is the overall removal of Giardiathat you will achieve?

e. Look up the primary standard for disinfection of Giardiaand report it. Do you meet the standard with one large tank (part b)? Do you meet the standard with three small tanks in series (part c)? Why?

Reference no: EM131030922

Questions Cloud

How evaluation be made non-threatening for workers : What are some of the reasons that may make staff resistant to or fearful of evaluation? How could evaluation be made non-threatening or even valued for workers in human service agencies?
Problem regarding the decision rules : In what sequence would the jobs be ranked according to the following decision rules:
Construct a program such that the inputs are a prime integer : The program returns 15 distinct x such that a x mod p is a multiple of numbers in the set B.
What are the benefits of drug testing to employers : What are the benefits of drug testing to employers and employees?What are the costs? Under what conditions would the benefits outweigh the costs?
Designing a chlorination system for drinking water : Imagine that you are designing a chlorination system for a drinking water treatment plant. The design flow rate is (1577 m3/hr). You must provide a free chlorine residual of at least 1.0 mg/L chlorine in order to protect against contamination in t..
Solve given logarithmic equations : For all problems, write the problem and then delineate the step-by-step process necessary to solve the problems. Solve each logarithmic equation- ln(3x+1) - ln(5+x) = ln2 and 2ln(x-3) = ln(x+5) + ln4
Summarize each article including details on research cited : Based on the information available in these articles, explain your stance. Should people take a multi? Why or why not? Response should be at least 450 words.
History when making an employment decision : Given the emerging national health care plan, to what degree can employers consider an individual's workers compensation, health, disability, or attendance history when making an employment decision?
Write a program that produces a list of nz notes and coins : Money dispenser calculatorWrite a program that produces a list of NZ notes and coins required to give change for a user-entered amount up to $1000.

Reviews

Write a Review

Accounting Basics Questions & Answers

  Trial balance and journalize the adjusting entry

If Allowance for Doubtful Accounts has a credit balance of $2,201 in the trial balance, journalize the adjusting entry at December 31, assuming bad debts are expected to be (1) 1% of net sales, and (2) 12% of accounts receivable.

  Niki company reviewed the following situations

At December 31, 2010, Niki Company reviewed the following situations to consider their impact on its 2010 financial statements:

  Questioncarol benton marcia diamond and sue knox work for a

questioncarol benton marcia diamond and sue knox work for a family physician dr. gwen conrad who is in private

  Dispose of the equipment in the coming year

Suarez intends to dispose of the equipment in the coming year. It is expected that the cost of disposal will be $ 38,900. As of December 31, 2014, the equipment has a remaining useful life of 4 years.

  To manufacture-not to manufacture

Imagine that you are the cost accounting manager and the director of your present or past organization. Management wants your opinion on whether the company should manufacture a new electric car.

  Nash is one of three equal unrelated shareholders of

nash is one of three equal unrelated shareholders of macleod corporation. nash has held macleod stock for four years

  Pertinent information regarding star

Rick Smith, Bill Thomas, Diane Asche, and Jill Renteria are equal owners in "STAR, Inc." - a corporation engaged in event planning services.  Pertinent information regarding STAR is summarized below.

  Problem related to cpa

Tammy called and wanted to let you know her new situation. Her real estate agent advised her that the home was worth $570,000 when her father died, and $450,000 when her mother died. As her CPA, how would you advise her?

  Altex inc manufactures two products car wheels and truck

altex inc. manufactures two products car wheels and truck wheels. to determine the amount of overhead to assign to each

  A company must incur annual fixed costs of 4000000 and

a company must incur annual fixed costs of 4000000 and variable costs of 400 per unit and estimates that it can sell

  Another contractor contractor b has put in a bid for the

using activity analysis arnoldson company has identified the appropriate cost driver for maintenance costs in a factory

  How does the maintenance of a receiving log enhance

How does the maintenance of a receiving log enhance internal controls?

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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