• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/33

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

33 Cards in this Set

  • Front
  • Back
How many lbs of air are needed to remove 1 lb of nitrogenous matter?
4.6 lbs
How many lbs of air are needed to remove 1 lbs of CBOD?
1.5 lbs
What should be sludge blanket lvl be in the secondary clarifier?
1 - 3 feet
What are the mose common types of air blowers used for aeration?
centerifugal and Positive Displacement
The aeration tank has a small area with no turbulence. What is the most likely cause??
Broken diffusers
There is excessive trubulence on one section of aeration tank. What is the most liekly cause?
Broken diffusers
What detemines the need to change a blower filter?
Manometer reading or differential pressure
In which direction should the blower orfice plate face?
Number should face toward the blower.
Before starting an air blower, what action does the operator take?
start oil circulation pump
The aeration tank is overloaded. What type of sludge would you expect?
young sludge
The aeration tank is underloaded, what type of bug population would you expect?
Rotifers & Nematodes; more bugs then food. (old sludge)
Rotifers & Nematodes are beginning to dominate. What type of sludge would you expect?
Older sludge
Free and stalked cilates are starting to dominate. What type of sludge would you expect?
Good settling and stable sludge
What microorganisms are generally found at startup of new aeration system
Amoeba
What organism uses it whip like tail to move about?
Flagellate
Which protozoa use other protozoa as food?
Suctoria
What do you call the long filamentous organism that uses sulfates as food?
Thiothrix
Which are the short filamentous organisms that re associated with foaming problems?
Nocardia
Which long filamentous organisms use iron for its food source?
Crenothrix
What does rotifers use to move about in their environment?
Cilia (short hairs) and forked tail
What does an amoeba use to move about its environment?
Pseudopod
The rotifers uses its forked tail for that purpose?
Move about and to anchor itself in one place
Which organism use short hairs on its body to move about?
Free swimming ciliates
Sludge bulking has occurred in secondary clarifier. What microorganisms would you expect to find in large numbers?
Long filamentous organisms
To view microorganisms in mixed liquor what microscope maginificaion is used?
10X and 43X
What divice is used to hold mixed liquor sample in place in the microscope?
the stage
If filamentous bacteria are starting to dominate, what action is needed by the operator?
Raise the DO and lower WAS
Voricella are what type of protozoa?
Stalked Ciliate
What do ciliates, amoeba, an nematodes have in common?
All are sludge condition indicator organisms
What type of counting is done to enumerate long filamentous organisms?
Filament Indexing
What kind of slide is used to ID Nocardia?
stained dried slide
Conditions favorable to free swimming ciliates are also favorable to what other organisms?
Bacteria ( Nitrogen and carbonaceous BOD digesting bacteria)
Which organisms use short hair on their body to move about in the water?
Free swimming ciliates