Basic Wastewater Final Exam Ga

Front 1

Septic

Back 1

When wastewater remains in the collection system too long it tends to become __________.

Front 2

1.5 fps

Back 2

Heavy organic material and grit will begin to settle out of wastewater flowing in grit channels at a velocity of ___________.

Front 3

Secondary Clarifier

Back 3

Chlorine is added to the __________ effluent for disinfection purposes.

Front 4

Grit

Back 4

Detritus is another name for ________?

Front 5

Improve Downstream Process Performance

Back 5

An aerated grit chamber will ________.

Front 6

Increase the velocity in the grit chamber

Back 6

The grit removed from the grit chamber contains a large amount of organic material in it, whats the best remedy?

Front 7

Secondary or final clarifiers

Back 7

Remove biological solids from wastewater

Front 8

NPDES Permit

Back 8

specifies the sample type, preservation method, and test method for effluent samples

Front 9

Sludge Bulking

Back 9

a condition when sludge becomes too light to settle

Front 10

Primary Clarification

Back 10

the treatment that always proceeds the RBC process and trickling filter process

Front 11

which test best measures the efficiency of a trickling filter

Back 11

BOD

Front 12

purpose of flow equalization

Back 12

Balance flows, dilute strong wastes and impound excessive flows temporarily

Front 13

could cause a demand for more oxygen in an aeration tank

Back 13

Increase in mircoorganisms

Front 14

Oxygen transfer in an oxidation ditch is increased by

Back 14

Raising the effluent weir, thus increasing the depth of the liquid in the ditch

Front 15

Longer sludge ages

Back 15

Most extended aeration processes have

Front 16

Where does the term "activated" com from in the activated sludge process?

Back 16

The sludge particles are teaming together with bacteria, fungi and protozoa

Front 17

Facultative ponds are

Back 17

Aerobic on top and anaerobic on the bottom

Front 18

definite green color of pond

Back 18

indication that a pond is well operated or being maintained properly

Front 19

Parts of a centrifugal pump

Back 19

Volute, Impeller and shaft and packing

Front 20

The dissolved oxygen in a pond system is a result of

Back 20

Photosynthesis

Front 21

Pathogenic

Back 21

Disease causing bacteria are called

Front 22

Disinfection

Back 22

Chlorine is commonly applied to the effluent of a treatment plant for

Front 23

An increase in the plant effluent coliform level could be caused by

Back 23

Increasing effluent solids, Mixing problems in the contact tank and/or Low chlorine dosage

Front 24

"coning" refers to

Back 24

Sludge that is removed too quickly from a sludge blanket

Front 25

Ammonia Solution

Back 25

Chlorine leaks may be detected by using an

Front 26

VA:ALK

Back 26

a test that reveals the most meaningful operating information on an anaerobic digester

Front 27

Calculate SVI

Back 27

Results from a settleability test that reveals the most meaningful operating information on an anaerobic digestor

Front 28

Indicators

Back 28

Coliform bacteria are _________.

Front 29

Why should a positive displacement pump never be started against a closed valve?

Back 29

Resulting pressure may damage line, pump and motor

Front 30

Calculating the SVI in the activated sludge process requires which information?

Back 30

Settleability and mixed liquor suspended solids