Category: water

3 Characteristics of Sewage – Physical, Chemical and Biological Characteristics

3 Characteristics of Sewage – Physical, Chemical and Biological Characteristics

Characteristics of Sewage The characteristics of sewage can be classified as:  Physical characteristics Chemical characteristics  Biological characteristics  Read More: - Factors Affecting The Quantity Of Storm Sewage Physical characteristics of Sewage Following are the physical characteristics of sewage: l) Specific Gravity  The specific gravity of sewage is very nearly equal to that of water 2) Colour The fresh sewage has a … Continue reading 3 Characteristics of Sewage – Physical, Chemical and Biological Characteristics

Maximum Permissible Concentration of Various Inorganic Elements Present in Potable Water As per WHO & BIS Standards

Maximum Permissible Concentration of Various Inorganic Elements Present in Potable Water As per WHO & BIS Standards

Maximum Permissible Concentration of Various Inorganic Elements Present in Potable Water Following are the values of maximum permissible concentration of various inorganic elements present in potable water as per the World Health Organization (WHO) and Bureau of Indian Standards (BIS) S.NoInorganic ElementMaximum Permissible Concentration in Potable Water as per WHO in mg/LMaximum Permissible Concentration in … Continue reading Maximum Permissible Concentration of Various Inorganic Elements Present in Potable Water As per WHO & BIS Standards

Find out the Quantity of Stormwater run-off in a Catchment Area || Mathematical Problem & Solution ||

Find out the Quantity of Stormwater run-off in a Catchment Area || Mathematical Problem & Solution ||

How to Find out the Quantity of Stormwater run-off in a Catchment Area Mathematical Problem: A catchment area of 20 km2 consists of two-third rural and one-third urban area. The rainfall intensity in this area is recorded as 25 mm/hr. Find the quantity of stormwater run-off in the area in litre per second. 'K' for … Continue reading Find out the Quantity of Stormwater run-off in a Catchment Area || Mathematical Problem & Solution ||

Biochemical Oxygen Demand (B.O.D) And Their Test

Biochemical Oxygen Demand (B.O.D) The amount of oxygen required to carry out the biological decomposition of dissolved solids in sewage under aerobic conditions at standard temperature is known as biochemical oxygen demand.  It indicates the amount of biologically active organic matter present in the sewage. It is generally less than C.O.D. The B.O.D of water … Continue reading Biochemical Oxygen Demand (B.O.D) And Their Test

Chemical Oxygen Demand (C.O.D) And Their Test

Chemical Oxygen Demand (C.O.D) The amount of oxygen required to carry out the chemical decomposition of organic matters in sewage is known as chemical oxygen demand (C.O.D).  It indicates the amount of biologically active as well as biologically inactive organic matter present in the sewage. In general, chemical oxygen demand(C.O.D) of sewage is higher than Biochemical … Continue reading Chemical Oxygen Demand (C.O.D) And Their Test