Bacteriological Test of Water

Bacteriological Test of Water

Freshwater swimming pools, whirlpools, and naturally occurring fresh and marine surface waters are all examples of recreational waters. These waters must be tested for the presence of coliform and/or heterotrophic bacteria. Although the presence of coliform bacteria in water suggests that it is potentially unsafe to drink. Other bacteria isolated from recreational water may pose … Read more

How to Determine Chlorides in Water Sample

Chlorides in Water

One of the most common inorganic anion in water and waste water is chloride (CL- ion). The salty taste produced by chloride concentrations in potable water varies depending on the chemical composition of the water. If the cation is sodium, some waters containing 250 CI- mg/I may have a detectable salty taste. When calcium and … Read more

Determination of Biochemical Oxygen Demand

determination of biochemical oxygen demand

What is Biochemical oxygen demand (BOD) ? Biochemical oxygen demand is used as a measure of the quantity of oxygen required for oxidation of Biodegradable organic matter present in water samples by aerobic biological action. The oxygen demand of wastewater is exerted by three classes of materials. 1. Carboneous organic materials are used as a … Read more