coagulation Coagulation:   ...

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coagulation

Coagulation:

 

~~Equipment/skill required:
A coagulant (ex. aluminium sulphate)
Some skill/training
2 vessels
Stirrer
Filter – a cloth

Process:
Add a coagulant to water and stir rapidly.
Allow to stand for some time, and continuously stir slowly to form large flocs.
The formed flocs clean the water by attracting pathogens and other microorganisms.
Remove the flocs using filtration and be careful to not re-contaminate the water.

~~Advantages:
Proven reduction of viruses, bacteria, protozoa
Pesticide and heavy metal removal
Simple technology and use

Disadvantages:
May be toxic if used improperly
Could be more expensive and complicated than other methods due to increased number of required materials and skill
Requires multiple steps