What is the purpose of the decantation/sedimentation step in the water treatment process? I - To remove impurities that agglomerate into flakes. I...
What is the purpose of the decantation/sedimentation step in the water treatment process?
I - To remove impurities that agglomerate into flakes.
II - To adjust the pH for the next steps.
III - To kill microorganisms present in the water.
IV - To separate impurities that are heavier than water.
a) Only I and IV are correct.
b) Only II and III are correct.
c) Only I, III, and IV are correct.
d) Only II and IV are correct.
I - To remove impurities that agglomerate into flakes.
II - To adjust the pH for the next steps.
III - To kill microorganisms present in the water.
IV - To separate impurities that are heavier than water.
a) Only I and IV are correct.
b) Only II and III are correct.
c) Only I, III, and IV are correct.
d) Only II and IV are correct.
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Ed 
O objetivo da etapa de decantação/sedimentação no processo de tratamento de água é separar as impurezas que são mais pesadas do que a água. A alternativa correta é a letra A) Somente I e IV estão corretas.
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