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Chapter: Environmental Engineering - Quality of water

List of diseases caused by bacterial,Viral and Protozoan infections throught Water

WATER BORNE DISEASES are those which are transmitted by contaminated water. Water is a very good carrier of micro organisms. Communicable diseases which may be transmitted by water include bacterial, viral and protozoan infections.

WATER BORNE DISEASES are those which are transmitted by contaminated water. Water is a very good carrier of micro organisms. Communicable diseases which may be transmitted by water include bacterial, viral and protozoan infections

 

The diseases caused by bacterial infections are

a.     Typhoid fewer

b.     Para-Typhoid

 

c.      Bacillary dysentery

d.     Cholera

e.      Solmonellosis

f.       Shigellosis

 

Viral infections

a.     Infectious hepatitis(jaundice)

b.     Polio myelitis

 

Protozoan infections

a.     Amoebic dysentery (Amoebiasis)

b.     Giardiasis.

 

1.IMPURITIES

A)INORGANIC

a. Suspended

b.Dissolved

 

CAUSES             

Particles of silt and clay

I)Carbonates  and bicarbonates of calcium and mg.               

ii)Sulphates  and  chortles  of  ca and mg.           

iii)carbonates  and         bicarbonates of sodium          

iv)Nitiates                               

v)chlorides of Na

vi)Fluorides of Na                  

vii)Iron oxide                

viii)Manganese              

                  

EFFECTS           

Turbidity             

Hardness & alkalinity   

Hardness and corrosion

Alkalinity            

Excess        over   50mg/lit

Methenoglubanemiao r blue babies. Brackish taste                

Excess over 1.5mg/L causes Fluor sis.                

Taste colour and hardness      

Taste and odour  

 

 

 

2.IMPURITIES

B) ORGANIC

I. Suspended

a.vegetable

b.animal

II.Dissolved

a.vegetable

b.Animal

 

CAUSES   

Decayed      leaves,

algae,Fungi,etc..  

Dead  animals,  hairs,    insects, etc..         

Large Quantities   of albuminoidal   nitrogen       with little    quantities  of  ammonia and chlorides.   

Large quantities    of Albuminoidal nitrogen       

 

EFFECTS

Acidity, taste and colour Contamination

Bacteria.

Pathogens, contamination due to sewage. Etc…

 

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