water supply engineering. ce 704. world university of bangladesh. chapter 10

8/12/2019 water supply engineering. ce 704. world university of bangladesh. chapter 10

1/12

Prepared By

Mehedi Hasan nam


2/12

WORLD UNIVERSITY OF BANGLADESH

Course Name : Water Supply Engineering Course No. : CE 704 Semester : 1stSemester Department : Civil Engineering Batch : 60 B) Shift : Evening Shift

Submitted To: Date Of Submission:SM Tanvir Faysal 11.02.2014


3/12

Group-10

Our Group Members Are:

1. Name : Mehedi Hasan Anam

ID No : 3283

2. Name : Abdul Aowal

ID No : 3282

3. Name : Roki-Bud-Thulla (Riju)

ID No : 3284


4/12

INDEX

Chapter No: Contents:

01 Introduction

02 Water Requirements

03 Ground Water

04 Surface Water Collection & Transportation

05 Pumps and Pumping Machinery

06 Hydraulics of Flow

07 Water Quality08 Water Purification

09 Distribution System

10 Industrial Water Supply

11 Planning & Design of Water Purification Plant


5/12


6/12

Industrial Water Supply

Introduction: Industry uses large volumes of water in its manufacturing process

and in supporting operations. Indeed, the production of foodstuffs, metals,chemicals and other basic commodities call for a tonnage of water that far exceeds

the combined tonnage of other raw materials. Finishing operations generally draw

appreciable quantities of water, fabrication and assembly are satisfied with

relatively small amounts. Not much of the water entering industrials works

actually becomes part of the manufactured product, and only a small fraction is

otherwise consumed or lost by evaporation. The larger fraction is employed non-consumptively. It becomes spent water and may contain many pollutants.


7/12

Water Requirements by Various Industries:The water needs of industry are varied aslarge. The water requirement for some selected industries shown in table.

Industry Unit of Production Gallons per Unit

Manufacturing Products

Paper

Leather (tanned)

Cotton goods

Automobiles

Ton

1000 sq. ft. of hide

1000 lb

Each

2,000-1,00,000

1,200-60,000

20,000-1,00,000

8,000-10,000

Food Products

Meat (slaughtering & packing)Beverage alcohol

Beer

1,000 lb live weightGallon

Barrel

600-3,500125-170

470

Mineral Products

Aluminum Ton 35,000-56,000


8/12

Industry Turbidity Color Hardness Alkalinity Iron &

Manganese

Total

Solids

Food

Products

Baked goods

Beer

Confectionery

Ice Cream

10

5

5

10

10

10

5

10

20-50

25-60

25-60

25-60

20-40

75-150

30-50

30-50

0.1

0.2

0.2

0.2

100-200

100-300

100

100

Manufactured

Products

Leather

Paper

Plastics

20

5

2

10-

100

5

50-135

50

135

50

50

0.4

0.1

0.25

200

200

200

Water Quality Requirements:Water use varies greatly form plant to plant. Quality

required is apt to be fairly uniform in all plants making a specific product, but it will

differ materially from industry to industry. In many cases the quality requirements for

industrial water supplies are much more exacting than are those for supplies for

municipalities. In terms of finished water characteristics, permissible limits for some

industries are as shown in table.


9/12

Boiler Feed-Waters: Modern high-pressure boilers must be supplied with feed

water of high purity. As the water evaporates the concentration of impurities in the

liquid phase rise, dissolved. The water in low-pressure boilers may be kept in

satisfactory condition by blow down alone. The American Boiler ManufacturesAssociation has set the upper limits for solids, alkalinity and silicate reported in

Table.

Boiler Presser,

psi

Total Solids Alkalinity Suspended

Solids

Silica

200-300 3,500 700 300 125

301-450 3,000 600 250 90

451-600 2,500 500 150 50

601-750 2,000 400 100 35

751-900 1,500 300 60 20

901-10000 1,250 250 40 8

1001-1500 1,000 200 20 2.5

1501-2000 750 150 10 1.0

Over 2000 500 100 5 0.5


10/12

Boiler waters are kept to specification by one or more of the following techniques:

(1) External treatment for the removal of impurities from the raw water,

(2) Internal treatment for the conditioning of water within the boiler.

(3) Blow down for the removal of concentrates and sludge.

(4) Treatment condensates.

Cooling Water: Water is the common coolant of the process industries. Temperaturesencountered range from the fractionation of liquid air through the chilling or refrigeration of food

products to the quenching of red heat steel. Urban supplies provide much cooling water.

Irrigation Waters: The quality of irrigation waters is of interest in relation:

(1) To resource developments in which available waters are exploited in parallel for

agricultural and municipal purposes.

(2) To schemes in which the waters made available for urban use are derived wholly orin part from the underflow of irrigated fields.

(3) To wastewater disposal by irrigating agricultural areas either by direct discharge

from the drainage system or by diversion of sewage polluted receiving waters.


11/12

Swimming Pool Waters: The sanitary quality of water in swimming pools is

determined by certain bacteriological, chemical and physical test. The bacterial qualityof swimming pool water is indicated by the bacteria count and coli form test.

Swimming pools must be kept clean at all times. Sediment, fungi, algae and visible dirt

should not be permitted to accumulate on the bottom, sidewalls or surrounding walks.

Treatment of Water for Industries: The methods used for treatment of municipal

waters are also used for the treatment of industrial waters. The choice of a particular

method or combination of methods depends entirely upon the type of industry.


12/12

THE END

water supply engineering. ce 704. world university of bangladesh. chapter 10

Documents