Wastewater Trickling Filters, Ponds And More

Front 1

In a pond, algae will increase _________.

Back 1

Chlorine Demand

Front 2

What is the recirculation ratio for a trickling filter? (using letters)

Back 2

Qr/Q (Qr is recirculation flow) (Q is wastewater flow not including recycling)

Front 3

Formula- Trickling Filter Hydraulic Loading (use letters)

Back 3

Q +Qr ÷ A (surface area of filter)

Front 4

The Extended Aeration Process does not produce as much _________ as other processes.

Back 4

waste sludge

Front 5

In a stabilization pond, what is the vertical distance from normal water surface to the top of the levee?

Back 5

Freeboard

Front 6

What process is usually operated in Extended Aeration mode, and it is used for small flows?

Back 6

Oxidation Ditch

Front 7

Which "flow" rates should you add together to calculate the hydraulic loading to a trickling filter? (use words)

Back 7

Plant inflow plus reirculated flow

Front 8

When would you expect reduced algae and less oxygen released into a pond? (seasons)

Back 8

Fall and Winter

Front 9

What increases when carbon dioxide is removed from a pond?

Back 9

PH

Front 10

_________sludge in the bottom of a secondary clarifier _________ of a trickling filter means that sludge has stayed in the secondary clarifier too long.

Back 10

Black sludge, downstream

Front 11

During the daytime, alga will release ________ for the ___________ bacteria in a pond.

Back 11

oxygen, aerobic

Front 12

What are the three main parts of a trickling filter?

Back 12

media, distribution system and underdrain

Front 13

In a pond, what 3 parameters should be measured several times a week?

Back 13

dissolved oxygen, temperature, PH

Front 14

The organic loading for a trickling filter is expressed (as an amount) in this format, using formula end terms?

Back 14

lbs BOD/day/1000 ft3

Front 15

A pond with a detention time of less than 3 days will perform similar to a __________.

Back 15

Sedimentation Tank

Front 16

Which type of bacteria are used in a trickling filter?

Back 16

Aerobic

Front 17

Excessive organic overload could be the cause of _______ in a trickling filter?

Back 17

Ponding

Front 18

The BOD removal efficiency in a facultative pond is _______.

Back 18

70% to 80%

Front 19

Solids or Organic overloading could cause slime growth on a rotating biological contactor (RBC) to appear _________.

Back 19

black

Front 20

What is the slime growth on a trickling filter called?

Back 20

Zoogleal Film

Front 21

Extended Aeration has a _______ F/M ratio.

Back 21

low

Front 22

To improve the efficiency of a trickling filter, you must add________.

Back 22

recirculation

Front 23

In a pond, during the day, algae uses ______, which raises ___.

Back 23

carbon dioxide, PH

Front 24

What color of a pond means that it is operating properly?

Back 24

deep green color

Front 25

True or False- An oxidation ditch is use for small communities?

Back 25

True

Front 26

True or False- A trickling filter is a type of activated sludge process usually operated in the extended aeration mode?

Back 26

False

Front 27

When algae consumes _________from a waste stabilization pond, the ______ of the wastewater in the pond will increase.

Back 27

carbon dioxide, PH

Front 28

Pond overloading causes _______ or _______ scum to appear on the surface of a pond.

Back 28

brown, black

Front 29

Trickling filters are mostly an _______ process.

Back 29

aerobic

Front 30

What is located below the media in a trickling filter?

Back 30

Underdrain System

Front 31

True or False- A benefit of recirculation for a trickling filter is that it decreases the contact time of the wastewater with the biological film.

Back 31

False

Front 32

Abnormal operation in a pond will or will not occur if it is overloaded with BOD?

Back 32

will

Front 33

Poor ventilation of a trickling filter could lead to what obvious problem?

Back 33

odor

Front 34

Shallow ponds used to treat wastewater are typically _______ deep.

Back 34

3 to 5 feet

Front 35

What could cause a trickling filter to operate less effectively?

Back 35

Ponding

Front 36

In a pond, algae consumes _____ and releases _______ for the aerobic bacteria in the pond.

Back 36

carbon dioxide, oxygen

Front 37

What type of treatment is primarily used to thicken sludge instead of dewatering the sludge?

Back 37

DAF

Front 38

Trickling filters with _____ media may be loaded at much higher rates than those with ______ media.

Back 38

plastic, rock

Front 39

How long does it take for slime to start to develop on the filter media in a trickling filter?

Back 39

several days

Front 40

Where does slime grow on a rotating biological contactor (RBC)?

Back 40

plastic disc media surface

Front 41

RBC's ( rotating biological contactors) have _______ moving parts and require ______ amounts of preventive maintenance.

Back 41

few, minor

Front 42

Since the oxidation ditch is operated as a closed system, the amount of volatile____________ solids will gradually __________.

Back 42

suspended solids, increase

Front 43

Do Ponds provide a consistently high-quality effluent?

Back 43

No

Front 44

Most complaints regarding Ponds are because of poor________.

Back 44

housekeeping

Front 45

The cause of rotating biological contactor media appearing black and producing odors that are not normal, could be "solids or BOD" ___________.

Back 45

overloading.

Front 46

Inorganic solids, such as _____, _____, and ________are captured in the oxidation ditch and removed during wasting or cleaning.

Back 46

sand, silt, cinders

Front 47

Acid producing bacteria in a pond convert organic matter to v_________, c__________, w__________ and n____________.

Back 47

volatile acids, carbon dioxide, water and nitrogen.

Front 48

When would you expect the lowest concentration of dissolved oxygen (DO) in a facultative pond?

Back 48

Sunrise

Front 49

______ are pond-like bodies of water or basins designed to receive, hold, and treat wastewater for a predetermined period of time. If necessary, they are lined with material, such as clay or an artificial liner, to prevent leaks to the groundwater below.

Back 49

Lagoons

Front 50

MBBR's use________ in a tank.

Back 50

floating media

Front 51

FBBR's attach _______ to fabric or plastic that is _________ in a basin.

Back 51

biomass, stationary

Front 52

IFAS's are combinations of ________ and integrated _______.

Back 52

Activated Sludge Processes, Fixed Film

Front 53

MBBR's and IFAS's can use ______ or free _______ media.

Back 53

fixed, floating

Front 54

MBBR's and FBBR's are pure __________ processes.

Back 54

fixed film

Front 55

Waste or Wastewater ___________ Ponds (WSPs) are large, man-made water bodies in which blackwater, greywater or faecal sludge are treated by natural occurring processes and the influence of solar light, wind, microorganisms and algae. The ponds can be used individually, or linked in a series for improved treatment.

Back 55

Stabilization

Front 56

Waste Stabilization Ponds (WSPs) are large, man made water bodies. ... There are three types of ponds, (1) _______, (2) ________ and (3) _________(maturation), each with different treatment and design characteristics.

Back 56

anaerobic, facultative, aerobic