The Effects Of Water Pollution

Pollution is a term applied to any environmental state or manifestation which is harmful or unpleasant to life, resulting from failure to achieve or maintain control over the chemical, physical or biological consequences or side effects of human scientific, industrial and social habits (Feugo, 2008; Anderson et al., 2005). From another perspective, water pollution refers to any physical, biological or chemical change in water quality that adversely affects living organisms and makes water unsuitable for desired uses as a result of anthropogenic activities (Cunningham and Saigo, 2003; Anderson et al., 2005). Many human activities from water supply and sanitation to transport, mining and the chemical industry have the potential to pollute water bodies. Though the types and sources of freshwater pollutants are usually interrelated, it is quite convenient to separate them into major categories in order to study them.

Sewage treatment is the process of removing physical, chemical and biological contaminants from waste water. Waste Water Treatment Plants are constructed to transform the raw sewage into an easier manageable waste, to retrieve and reuse the treated sewage water. Its objective is to produce an environmentally safe treated effluent or treated sludge suitable for disposal or reuse. The end products of a sewage treatment are treated sludge and sewage water. These products contain organic biodegradable, non-biodegradable and toxic substances. Furthermore improperly