True and False - 5

Question 1

Activated sludge blower electrical costs is a major cost in operating an activated sludge plant

Answer 1

T

Question 2

Activated sludge contains bacteria, microorganisms and animals

Answer 2

T

Question 3

The wasting rate for a pure oxygen activated sludge plant is normally the same as for a conventional activated sludge plant

Answer 3

F

Question 4

Step feed oxygen demand is more uniform than conventional activated sludge

Answer 4

T

Question 5

A low F/M ratio is the main concern when starting up an activated sludge basin and is indicated by white foam

Answer 5

F

Question 6

Continuous sludge solid or MLSS wasting will decrease secondary process efficiency

Answer 6

F

Question 7

Immediately increase wasting if you see a white crispy foam in the aeration basin

Answer 7

F

Question 8

The operator should increase the F/M ratio when the temperature drops

Answer 8

F

Question 9

Amboids indicate a relative low sludge age

Answer 9

T

Question 10

Rotifers indicate a low sludge age

Answer 10

F

Question 11

The bacteria in wastewater so the treatment while microorganisms are used as indicators

Answer 11

T

Question 12

Algae will cause bright green pond color and indicate proper operations

Answer 12

T

Question 13

A facultative pond should be operated at a lower water level than an aerobic pond

Answer 13

F

Question 14

Chloramines have no disinfection value

Answer 14

F

Question 15

After all chlorine reactions have been completed, the remaining chlorine is termed free available chlorine

Answer 15

T

Question 16

Chlorine gas combines with moisture in the air to form hydrochloric gas

Answer 16

T

Question 17

A low chlorine dose can be used for microorganism control in secondary processes

Answer 17

T

Question 18

Coliform bacteria can be used as an indicator of disease causing organism

Answer 18

T

Question 19

Chlorine is a quicker disinfectant at increased wastewater temperature

Answer 19

T

Question 20

Flexible piping, sometimes called a pigtail, should connect a chlorine container to stationary piping

Answer 20

T

Question 21

Fixed solids reduction is much higher than volatile solids reduction in an aerobic digester

Answer 21

F

Question 22

In anaerobic and aerobic processes, the pH and temperature will influence the type of microorganisms present

Answer 22

T

Question 23

Volatile solids will be reduced by about 50% in a properly operating anaerobic sludge digester

Answer 23

T

Question 24

Normal practice is to clean an anaerobic sludge digester every 4-7 years

Answer 24

T

Question 25

If the sludge disposal rate is lower than the sludge generation rate sludge, storage will be required

Answer 25

T