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Industrial pollution

Industries such as paper, textile, detergents, medicine, fertilizers, weapons, diary and meat result in a wide number of dangerous solid, liquid and gaseous pollutants including heavy metals, nutrients, organics, and turbidity. A part of these pollutants usually reach water bodies and make them unsuitable for usage.        
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Do you know how detergents affect aquatic lives?
Remnants of detergents dissolved in water cause several problems to aquatic environments. Besides the direct toxic effects on fish in fresh waters they also result on foam formation. This foam decreases the transmission of light, hindering the transfer of oxygen and subsequently, the speed of photosynthesis, and bringing in an overproduction of algae, that’s to say, eutrophication. As a result, the ecological balance is seriously disturbed. Detergents not only cause negative impacts in the receiving environment, but also bring about negative impacts to the waste water treatment processes as they decrease the refinement efficiency and the general operation of the units in the wastewater treatment plant (Bayraklı and et al, 2001).  


Figure 2. Untreated effluent flows from a sugar factory to the river (UNEP, 2012)