Taste And Odors Flashcards
What does TON mean?
Threshold odor number
What is the SMCL for odor?
3
Name three sources of origination for taste and odor?
Raw water source, plant chemicals, distribution system
What is the first step in solving a taste and odor problem?
Locate origin and extent
The 2 broad categories of treatment for taste and odor are?
Destruction and removal
Taste and odors that have as their source volatile organics can be treated by what two methods?
Aeration and air stripping
Which of the following is a process that combines the elements of air blowers and cascades to achieve aeration and volatile organic removal?
Air stripping
How are volatile organics removed from water?
degasification
Earthly taste and odors are caused by which of the following?
Microorganisms
How would you determine the cause of an earthly / musty taste or odor?
Microscopic examination
Customers called and complained of a geranium taste and odor? What is the likely cause?
Trichloramines
Customers call and complain of a swimming pool taste and odor? What is the likely cause?
Low chlorine residual
There is a fruity taste and odor in the water . What is the likely cause?
Aldehydes
What is a cause of aldehyes in water?
Breakdown of amino acids by ozonation
There is a sweet aromatic taste and odor. What is the likely cause?
Phenols/ chlorophenols
What should you use to get rid of a phenolic taste or odor?
GAC ( granular activated carbon)
The water system used a large amount of chlorine to remove a severe taste and odor problem at the plant. Which of the following would they use to remove the chlorine before the water left the plant?
GAC
What is the term used for the natural process that brings about an increase in the nutritional level of a lake or reservoir?
Eutrophication
Which of the following organisms move about in the water by the use of its tail-like appendages?
Flagellate
What laboratory equipment is used to measure the volume of settable solids in a specific volume?
Imhoff cone
Volatile solids are measured in a muffled furnace at what temperature and for how long?
550° c, 1 hour
PAC should always be added at which point in the treatment process?
Before chlorine/chlorination
Which of the following is the correct way to store KMnO⁴?
On Pallets away from heated pipes
What color is created when? KMnO⁴ is added to water?
Purple/ changes to pink
If water has signs of rust or clay, what action is needed?
Do not acidify sample and test immediately
