WATER POLLUTION

water pollution

Dissolved oxygen(DO)

Oxygen is total important spices in water it is consumed by oxidation of organic matter reducing agent is an important water quality parameter the optimum value for good water quality is 4-6 mg, of DO, which ensures healthy aquatic life in water bodies. lower DO indicate water pollution. the primary cause of water deoxygenation has being the presence of substances collectively called oxygen demanding wasters. the available reserve oxygen has been consumed by bacterial activity, and thus the pretence of such materials quickly gives rise to depletion of dissolved oxygen.

Biochemical oxygen demand(BOD)

biochemical oxygen demand has been standardized measurement of the amount of oxygen that would be required by microorganism to cause the decomposition of certain organic and inorganic matter in the water.Hence the amount of oxygen required by the microorganism to oxidized the organic waste aerobically is called biological oxygen demand.

chemical oxygen demand

chemical oxygen demand is an index of the organic content of water and is an important water quality parameters.