Chemical Process
Fermentation is adversely affected by the

Presence of ammonium salts
Absence of air
Presence of air
High concentration

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Chemical Process
Use of hydrated lime in water treatment

Before filtration, reduces the bacterial load on filters
After filtration, combats the corrosive-ness of water due to the presence of O₂ & CO₂
Is to adjust the pH value
All of these

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