Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Other Engineering Expert

problem1. A water treatment plant uses a dual media filter. The two media employed are:

i) Anthracite coal with effective diameter of 1.1 mm, porosity of 0.6, and shape factor of 0.5.

ii) Sand with effective diameter of 0.5 mm, porosity of 0.45, and shape factor of 0.7.

The complete filter depth is 0.8 m with 0.5 and 0.3 meters of anthracite coal and sand correspondingly. Compute the total head loss in the clean filter if the loading rate is 200 m3/m2.day and operational temperature is100C.

problem2. A conventional surface water plant with flocculation, coagulation, sedimentation, and filtration produces filtered water with turbidity less than 0.3 NTU, pH 7 and temperature 10oC on a day when the peak hourly flow is 3.0 MGD.  After filtration, the water is chlorinated in a baffled reservoir.  For the peak hourly flow rate, t10 is 90 minutes.  What is the needed disinfection for the removal of Guardia cysts of the filtered water if free chlorine is employed?  The raw water microorganism concentration is <1/100 L.

Note: According to regulations, the free residual chlorine in water entering the distribution system can’t be less than 0.2 mg/L for more than 4 hours and a residual in distribution system should be detectable in at least 95% of the samples tested each month. 

problem3. The transmission main from the well field to the community is 2500 ft, the velocity of flow at peak pumping capacity is 3.5 fps, water temperature is 10oC, and pH is 7.5.  If free chlorine residual is applied at the well field and is 0.5 mg/L entering the distribution system, what is the log inactivation of viruses? 

problem4
. As part of their proposed latest research treatment plant, City of St. James is planning to employ five banks of rapid sand filter after their sedimentation tanks.  Each bank of sand filters has six filters operated in parallel.  Each filter bed has a surface area of 3m X 2m.  The design flow rate is 0.044 m3/second.  If the design loading rate to filter is 150 m3 /day. m2, compute the following:

i) What total filter surface area should be provided and how many banks of filters need to be operational?

ii) What is the loading rate when one filter is out of service?

Note: Experiments conducted with rapid sand filters at nearby water treatment plants have demonstrated that satisfactory water quality can be received with rates as high as 235 m3 /day. m2.

problem5. A groundwater contains the following constituents to be treated by the lime-soda process to the minimum hardness probable has the subsequent features: 

CO2 = 62.0 mg/L        HCO3- = 250.0 mg/L as CaCO3
Ca2+ = 80.00 mg/L        Cl- = 35 mg/L
Mg2+ = 36.6 mg/L        SO42- = 96.0 mg/L
Na+ = 23.0 mg/L
The facility is to treat 50 x 106 L/day of water from this source using lime-soda ash to     reduce the hardness.

i) Find out the total hardness, carbonate hardness, and non-carbonate hardness in mg/L as CaCO3.

ii) Find out the lime and soda-ash dosages for softening (units of kg/day).  Assume that the lime is 90 percent CaO by weight and the soda ash is pure sodium carbonate.

problem6. A water treatment plant is processing 19,000 m3/day of water.  A settling basin for Type- 2 suspension will remove 100 percent of all particles which has a settling velocity of 0.75 m/hour.  The basin has an average depth of 3.5 meters and the weir overflow rate is 8m3/m.hour. 

Find out:

i) Dimensions of each basin

ii) Detention time

iii) Weir length for each basin.

 Suppose there are 3 basins with a rectangular unit in that the length is 3 times the width.

problem7. Why is there a concern for dissolved organics and color in water supply and in water treatment plant?

Other Engineering, Engineering

  • Category:- Other Engineering
  • Reference No.:- M9855

Have any Question? 


Related Questions in Other Engineering

Experiment specifications1turn on the pump and adjust the

Experiment Specifications: 1. Turn on the pump and adjust the control valve on the hydraulic bench, the exit valve of the flow meter demonstration unit and the bleed valve on the manometer manifold to bleed off all air b ...

Discussion-please share with your classmates an experience

Discussion- Please share with your classmates an experience where you have dealt with lack of accommodation for the user in the design of equipment, process, or product. What was done to accommodate the user? Which anthr ...

Electronics lab transistor biasingdiscuss what transistor

Electronics Lab: Transistor Biasing Discuss what "transistor biasing" means and its importance to transistor circuit design. Choose one type of biasing, and explain either how it works or its advantages and disadvantages ...

Part -1chapter 1 - introduction introduce the project

Part -1: CHAPTER 1 - Introduction: Introduce the project problem; define the scope, aim and objectives of the investigations. CHAPTER 2 - Literature Review: Describe the literature/ theory reviewed which are relevant to ...

Microcomputers lab exploring pwmobjectives to gain a better

Microcomputers Lab: Exploring PWM Objectives: To gain a better understanding of Pulse Width Modulation. What you will need: Arduino UNO, Analog Discovery Kit (ADK), LU EE Component Kit, jump wires, a computer with instal ...

Assignmentwhy program design is importantanswer the

Assignment Why Program Design is Important? Answer the following questions: 1. What is a program design? 2. Why program design is important? 3. What program design tools are available? Discuss in details by studying at l ...

History of architecture and urbanismpick five questions

History of Architecture and Urbanism PICK FIVE QUESTIONS TOTAL TO BE ANSWERED: Each answer must be 150 to 400 words. To be typed, not hand­written. Email your final exam to your discussion leader. 1. The concept of "mode ...

Finite element analysis in engineering term assignmentfor

Finite Element Analysis in Engineering Term Assignment For the truss system above, do the following. Q1: (a) Solve for the x,y components of displacement of each joint using one bar element for each link. Show all work i ...

Assignmentactive filter design techniques1refer to chapter

ASSIGNMENT: Active Filter Design Techniques 1. Refer to Chapter 6 in the text as needed. 2. Using the Fast, Practical Filter Design technique presented in section 6.3 design the following. Be sure to show all work for fu ...

Power flow project -figure 1 shows a single-line diagram of

Power Flow Project - Figure 1 shows a single-line diagram of a five-bus power system. Input data are given in Tables 1, 2, and 3. As shown in Table 1, bus 1 is the swing bus, to which a generator is connected. Bus 3 is a ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen