What are the various constituents of domestic
sewage? Discuss the effects of sewage discharge on a river.
What are the various constituents of domestic sewage? Discuss the effects of sewage discharge on a river.
Domestic sewage is the waste originating
from the kitchen, toilet, laundry, and other sources. It contains
impurities such as suspended solid (sand, salt, clay), colloidal
material (fecal matter, bacteria, plastic and cloth fiber), dissolved
materials (nitrate, phosphate, calcium, sodium, ammonia), and
disease-causing microbes. When organic wastes from the sewage enter
the water bodies, it serves as a food source for micro-organisms such
as algae and bacteria. As a result, the population of these
micro-organisms in the water body increases. Here, they utilize most
of the dissolved oxygen for their metabolism. This results in an
increase in the levels of Biological oxygen demand (BOD) in river
water and results in the death of aquatic organisms. Also, the
nutrients in the water lead to the growth of planktonic algal,
causing algal bloom. This causes deterioration of water quality and
fish mortality.
Domestic sewage is the waste originating
from the kitchen, toilet, laundry, and other sources. It contains
impurities such as suspended solid (sand, salt, clay), colloidal
material (fecal matter, bacteria, plastic and cloth fiber), dissolved
materials (nitrate, phosphate, calcium, sodium, ammonia), and
disease-causing microbes. When organic wastes from the sewage enter
the water bodies, it serves as a food source for micro-organisms such
as algae and bacteria. As a result, the population of these
micro-organisms in the water body increases. Here, they utilize most
of the dissolved oxygen for their metabolism. This results in an
increase in the levels of Biological oxygen demand (BOD) in river
water and results in the death of aquatic organisms. Also, the
nutrients in the water lead to the growth of planktonic algal,
causing algal bloom. This causes deterioration of water quality and
fish mortality.
