Raw Water Quality Parameters

 Acceptable limit of total solid = 500 mg/lit

Threshold odour number

 where TON = Threshold odor number

constituents of Alkalinity

 Major sources  

 Minor sources  

(a)

 Equivalent weight of

(b)

(c)

 where,

 Value of water

  For strong acid.

  For strong base

  For neutral solution

Hardness of water

 where,

(a)

 Where,

 atomic weight of Ca = 40

 atomic weight of Mg = 24

 atomic weight of O = 16

 atomic weight C = 12

 valency of Ca = 2

 Valency of Mg = 2

(b)  

(c)  

 Note: -ve value is taken as zero.

(d) Hardness

 Household supplies limit 74-115 mg/l

(e) The acceptable limit of hardness = 200 mg/lit as  

 and cause of rejection is 600 mg/lit as

Biochemical Oxygen Demand (BOD)

 whereof 5 days

  Loss of oxygen in mg/lit.

  Initial dissolved oxygen concentration in the diluted sample.

  Final dissolved oxygen concentration in the diluted sample.

 (After 5 day of incubation of 20^oC)

·              Turbidity>5 units–detectable by naked eye.

·              In Nephlometer, turbidity is expressed in FTU.

Biological WQP

 Testing of Colliforms is done

*****

If you are preparing for ESE/ GATE or other PSU Exams (Civil Engineering), then avail Online Classroom Program for ESE and GATE CE:

Online Classroom Program for ESE/GATE CE

You can avail of BYJU'S Exam Prep Test Series specially designed for all Civil Engineering Exams:

BYJU'S Exam Prep Test Series ESE/GATE CE

Thanks

All the Best