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Oxygen levels required to decompose this waste is called biological oxygen demand .a large amount of biological oxygen demand is required to decompose industrial wastes and because of their profit maximization motive the opt dispose in water to reduce cost of treatment. The wastes when directed to water bodies always have catastrophic effects on marine and human life.
The second type of pollutant is excessive nutrition. This is common in agricultural where agricultural runoffs and non biodegradable detergents contaminate water. This facilitates growth of phytoplankton. The autophication process results in large dissolved oxygen from photosynthesis during the day and over utilization of oxygen for respiratory purposes during the night. This causes deficiency of oxygen in water leading to massive death of aquatic animals.
Suspended solids are also another type of pollution in this 21st century. This is prevalent where land has been disturbed by plowing or excavation. Ground up wood fibers can also be classified in this category of suspended solid pollution.
There are over 65000 industrial chemicals in use in the modern world .3-5 new chemical s enter the market every day .the major classes of chemicals which are harmful and find their way through to water sources are ammonia, petroleum hydrocarbons, pesticides, and detergents.(Heath A.G,1995)
Another type of water pollution is microbiological pollution. This is natural form of pollution caused by microorganisms. They include e bacteria, viruses and protozoa. They are the major cause of illness in human being and animals. (Canter w. L and knot 1985)
Human activities have negative impact and contribute greatly in water pollution. Industrial waste form the largest percentage of water pollution .nuclear waste produced from industrial, medical and scientific process that use radioactive materials can be very harmful when they find they way to water
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Water pollution is a significant problem in today’s day and age because of rapid speed at which the world is facing technological development. New industries are coming up day by day, situated near rivers and seas for the purpose of having ease of access of water and at the same time, these factories and industries end up dumping their wastes into these water bodies, thereby causing difficulties for both the flora as well as the fauna within these environments.
It may be a chemical known to cause cancer, which has been discharged from an industrial waste site. The ill effects of water pollution can range from a mild inconvenience to a serious health problem in humans.
Hindu scriptures have referred to the River Ganges as “Mother Ganga”. They consider it a bequest from the gods. In the Sanscrit epic poem, that was created almost four hundred years before Christ, Lord Vinshu said, “Man becomes pure by the touch of the water,
He mentions the stop-gap measures that the local and national government has taken in order to help curb the problem. In the end, he reminds his readers that water pollution is a problem that affect us all, regardless of how far away the water
It occurs when pollutants are directly or indirectly discharged into water bodies without adequate treatment to remove harmful compounds. In numerous parts of the world mainly the developing countries, water pollution is a widespread menace which has profound impacts on the aesthetic characteristics of the environment.
Even though this fact is recognized by humans, they disregard it by polluting lakes, rivers, oceans and seas. Water pollution causes many problems which includes diseases and killing of fish. Polluted water is also detrimental to human beings and animal life. The thesis will contend that water pollution comprises thermal pollution, industrial effluent and flooding.
Food supplies and provision of adequate food are problems that currently affect the human population because of lack of access clean and fresh water. It means different countries are unable to suggest preventive measures to safeguard humanity from succumbing to the dangers posed by both water shortage and its eventual pollution.
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