WATER TREATMENT PLANT

INTRODUCTION

• The objective of designing this water treatment plant for ALDEL campus is to provide clean water for the entire campus.

• The Water treatment plant is being designed for water that has been drawn from the ground.

POPULATION ESTIMATE

No. of students 1469

Teaching & non teaching staffs 108

Hostel and staff population 95

Canteen staff 20

PER CAPITA PER DAY WATER REQUIREMENT - CPHEEO NORMS

1. Domestic 140 to 172 lpcd

2. Industrial, Commercial and Community requirementbased on 45000 litres per hect. per day

47 lpcd

3. Fire protection based on 1% of the total demand

3 lpcd

3. Floating population and special uses like hotels and Embassies

52 lpcd

WATER REQUIREMENT ESTIMATE FROM GUIDELINES

Heads litersWater required for 1469 students @ 47 liters per day 69043

Water required for 108 teaching & non teaching staff @47 liters per day

5047

Water required for 95 hostel and staff population @ 140 liters per day

13440

Water required for 20 canteen staff @ 47 liters per day

940

Water required for Gardening purpose @ 3 liters per person per day for 1692

5076

Total Required 93596

Design requirement 1,00,000

TESTS PERFORMED

Removing Hardness

• SOFTENING • The two basic methods of softening public water

supplies are – chemical precipitation (Lime and Soda ash) and – ion exchange.

• Other methods can also be used to soften water, such as electrodialysis, distillation, freezing, and reverse osmosis.

• These processes are complex and expensive .

Lime and Soda Ash• The chemicals normally used are lime (calcium hydroxide, Ca(OH)2)

and soda ash (sodium carbonate, Na2CO3). – Lime is used to remove the chemicals that cause the carbonate

hardness. – Soda ash is used to remove the chemicals that cause the non-

carbonate hardness.

• In this process Calcium and Magnesium ions are precipitated by the addition of lime (Ca(OH)2) and soda ash (Na2CO3).

ReactionsLIME ADDITION:-

LIME AND SODA ADDITION:-

Lime and Soda dosageTheoritical Quantity Actual Quantity

Lime Required 229.13 mg/L Lime Required 330 mg/L

Soda ash Required 70.25 mg/L Soda ash Required 130 mg/L

Experiments performed

• Total hardness test• Jar test• pH meter test• Titration for chlorine content test

Components and flow Chart of water treatment plant

Aeration Tank

Design Criteria For Cascade Aerators• Number of trays = 4 to 9

• Spacing of trays = 0.3 to 0.75 m c/c

• Height of the structure = 2 m

• Space requirement = 0.015-0.045 m2/m3/hr

Design CalculationQmax = 0.1543 m3/sec.

Provide area at tray = 17 m2

Diameter of bottom most tray = 5 m

Rise of each tray = 0.4 m

Tread of each tray = 50 cm

Aeration (cascade type)

THANKS for Your Patience