Waste water

It is the amount of chlorine that is required to satisfy all the impurities.

What is the point where the chlorine levels exceed the oxidant demand?

Enumerate the three common types of chlorine used in water treatment.

Enumerate the commonly used dechlorinating chemicals.

If the chlorine dosage needed for water is 1.2 mg/L and the demand is known to be 0.8 mg/L, what is the residual amount in the water?

It is the process of removing the free and combined chlorine residuals to reduce residual toxicity after chlorination and before discharge

The following are reagents for the ascorbic acid method, EXCEPT (Ammonium persulfate, Ascorbic acid, Sulfuric acid & Antimonyl tartrate)

When adding the powder reagent to the sample in the ascorbic acid method, what color does the mixture become?

These are known as ‘reactive phosphates’ and is the most common type of phosphate present in wastewater.

1.      The following are commonly measured phosphorus parameters in water, EXCEPT: (Total phosphorus, Dissolved Phosphorus, Total Orthophosphate

& All of the answers are commonly measured parameters)