Waste Water Techniques

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Techniques for the management of waste water

Waste Water:-
First of all we should not what waste water is. Any water that is contaminated by human waste or waste from other harmful substances is termed specifically as “waste water”. There are several activities of human that is polluting our water and ultimately risking our lives or we can also say that they are slow poisoning us Humans.
Contaminants of the waste water:-
The contaminants include detergents, soaps, oils, chemicals, artificial dyes, garbage, lubricants, medicines, human waste, animal waste, microbes, and sometimes food too. In our country, industrialist build big factories but they don’t make proper arrangements for the disposal of the waste that may be in the form of liquid or in the form of toxic gases. Factories directly discharge the waste liquid into the sea or rivers. Fishes may consume those toxic chemicals and die or it starts accumulating in their bodies. When, we, humans, will eat those fishes then the toxin will transfer in our body and cause us diseases. There is certain quantity of these contaminants that can be tolerated by human body. If the quantity is greater than the tolerable amount then it can lead to disastrous effects and ultimately death. In order to save our environment and our lives scientists designed some techniques by which this waste can be either recycled and used again or disposed of.
Water-borne Diseases:-
There are many diseases that are caused by consuming waste water or polluted water.
The diseases include:
1. Amoebiasis;
2. Cholera;
3. Dysentery;
4. Diarrhoea;
5. Malaria;
6. Polyomavirus Infection;
7. Polio mellitus.

Techniques for the management of waste water:-
There are certain techniques which can help us to ...

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...ng upon the condition of the liquid. Same is the case here; in this process industrial waste water is treated with some acid or base to maintain the pH of the water.
As we all know that lime is a base so it is added in the acid wastes to neutralize them.
Coagulation is the process by which a chemical is added in the water that forms insoluble products that are ultimately eliminated from the system. End products serve to remove the substances from the waste water. Its examples include using polyvalent metals; lime, ferric chloride, ferric sulfate and aluminum sulfate. They are typical coagulants.
Activated carbon is used to adsorb substances on it.
Ion Exchanging:-
Ion exchange was used previously for removing small ions from the waste water but now it is not used extensively. This process involves exchanging certain ions for other ions.
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