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Anaerobic Treatment

Total questions: 68

Worksheet time: 34mins

Name
Class
Date
1.
Bacteria are beneficial to wastewater treatment because
a)
they naturally break down organic matter
b)
they help solid material to settle out of the wastewater
c)
the nutrients produced are beneficial to the treated water
d)
they aren't beneficial
2.

Which method introduces microorganisms to break down hazardous organic compounds?

a)

Sanitary landfill

b)

Incineration

c)

Discharge to sewers, streams, and rivers

d)

Chemical treatment

e)

Biological treatment

3.

The rationale of having anaerobic treatment is as listed except ____.

a)

Rapid response to substrate addition after long periods without feeding

b)

Fewer nutrient required

c)

Production of odour & corrosive gases

d)

Small reactor volume

4.

Types of microorganisms involved in the anaerobic treatment are

a)

facultative bacteria

b)

acidogens

c)

acetogens

d)

methanogens

5.

Biogas that is being produced from the anaerobic process

a)

carbon dioxide

b)

oxygen

c)

methane

d)

ethane

6.

The main purpose of secondary wastewater treatment is

a)

to use several aerobic biological processes

b)

to remove the residual organics and suspended solids

c)

to separated microorganisms from the treated wastewater by sedimentation

d)

to remove suspended solid from the treated wastewater by sedimentation.

7.

Anaerobic bacteria are added in the digester tank to decompose the organic matter to produce

a)

biogas

b)

Foul smell

c)

sludge

d)

sewage

8.
Which compounds are produced by the two main types of fermentation? 
a)
NAD+ or ATP
b)
alcohol or lactic acid
c)
glucose or carbon dioxide
d)
ADP or ATP
9.
Which of the following is true about anaerobic respiration?
a)
It is a fast process
b)
It allows organisms to live in places with little oxygen
c)
It evolved before aerobic respiration
d)
all of the above
10.

Which of the following is/are products of wastewater treatment?

a)

Biogas

b)

Sludge

c)

Both biogas and sludge

d)

Aerator

11.

What does anaerobic mean?

a)

with air

b)

without air

12.

Biogas is a renewable natural gas.

a)

True

b)

False

13.

Biogas is a product of anaerobic digestion of organic wastes. Point out facts on Biogas.

a)

can be used as fuel gas

b)

used in stationary engines to generate electricity

c)

free from CO2

d)

Consists of 70% CH4

e)

Biomethane can be processed from biogas

14.

Biogas consist mainly carbon dioxide and methane.

a)

True

b)

False

15.

Four (4) steps in anaerobic digestion are:

a)

Acidogenesis

b)

Hydrolysis

c)

Photosynthesis

d)

Acetogenesis

e)

Methanogenesis

16.

Mesophilic system operate at 25-45 degrees Celcius.

a)

True

b)

False

17.

Below are factors affecting methane production, except:

a)

pH

b)

Presence of oxygen

c)

Temperature

d)

Presence of inhibitors

e)

Slurry composition 30:1

18.

Biogas produce..

a)

heat only

b)

electricity only

c)

none

d)

heat & electricity

19.

What is the advantages of biogas?

a)

It requires water

b)

Using expensive machines to generate

c)

Contains Impurities

d)

Eco-Friendly

20.
Bacteria are beneficial to wastewater treatment because
a)
they naturally break down organic matter
b)
they help solid material to settle out of the wastewater
c)
the nutrients produced are beneficial to the treated water
d)
they aren't beneficial
21.

Types of microorganisms involved in the anaerobic treatment are

a)

facultative bacteria

b)

acidogens

c)

acetogens

d)

methanogens

22.

What happens in the biogas digesters?

a)

aerobic bacteria processes organic waste

b)

organic waste is turned into usable fertilizer

c)

anaerobic bacteria processes organic waste

d)

chlorine is added to disinfect biosolids

23.

Which of the following is not a source of wastewater?

a)

Sewers

b)

Home

c)

Industries

d)

Hospitals

24.

Definition of COD

a)

The quantity of equivalent oxygen needed to chemically oxidize the organic compound in sample, converted to carbon dioxide and water.

b)

The quantity of equivalent chemical needed to biologically oxidize the organic compound in sample, converted to nitrogen and water.

25.
What does it mean for something to be anaerobic?
a)
It requires CO2
b)
It does not require CO2
c)
It requires oxygen
d)
It does not require oxygen
26.
What are the products of aerobic respiration?
a)
Glucose and oxygen
b)
Carbon dioxide and water
c)
Lactic acid
d)
Carbon monoxide
27.
Glycolysis results in the net gain of:
a)
2 ATP
b)
4 ATP
c)
4 NADH
d)
2 Acetyl CoA
28.
The first step in getting energy in the cell by breaking down glucose is known as
a)
the Krebs cycle
b)
electron transport
c)
fermentation
d)
glycolysis
29.
What is the correct equation for cellular respiration?
a)
6O2 + C6H12O6 -> 6CO2 + 6H2O + Energy
b)
6O2 + C6H12O6 + Energy -> 6CO2 + 6H2O
c)
6CO2 + 6H2O -> 6O2 + C6H12O6 + Energy
d)
6CO2 + 6H2O + Energy -> 6O2 + C6H12O6
30.
Fermentation involves
a)
aerobic respiration
b)
anaerobic respiration 
31.
What does it mean for something to be anaerobic?
a)
It requires CO2
b)
It does not require CO2
c)
It requires oxygen
d)
It does not require oxygen
32.

What does X represent in the diagram?

(a)  

33.

Which 3 of the following are TRUE about ANAEROBIC RESPIRATION.

a)

It produces 36 ATP

b)

It produces 2 ATP

c)

It only occurs with a lack of oxygen.

d)

It occurs in the cytoplasm is cells.

e)

It uses Oxygen to produce energy

34.

Both anaerobic and aerobic respiration need (a)   as a reactant to take in.

35.
What does it mean for something to be anaerobic?
a)
It requires CO2
b)
It does not require CO2
c)
It requires oxygen
d)
It does not require oxygen
36.
Which compounds are produced by the two main types of fermentation? 
a)
NAD+ or ATP
b)
alcohol or lactic acid
c)
glucose or carbon dioxide
d)
ADP or ATP
37.

Fermentation is a type of ....

a)

Aerobic Respiration

b)

Anaerobic Respiration

c)

Lactic Acid

38.

Mesophilic system operate at 25-45 degrees Celcius.

a)

True

b)

False

39.

Below are factors affecting methane production, except:

a)

pH

b)

Presence of oxygen

c)

Temperature

d)

Presence of inhibitors

e)

Slurry composition 30:1

40.
Bacteria are beneficial to wastewater treatment because
a)
they naturally break down organic matter
b)
they help solid material to settle out of the wastewater
c)
the nutrients produced are beneficial to the treated water
d)
they aren't beneficial
41.

Which method introduces microorganisms to break down hazardous organic compounds?

a)

Sanitary landfill

b)

Incineration

c)

Discharge to sewers, streams, and rivers

d)

Chemical treatment

e)

Biological treatment

42.

The rationale of having anaerobic treatment is as listed except ____.

a)

Rapid response to substrate addition after long periods without feeding

b)

Fewer nutrient required

c)

Production of odour & corrosive gases

d)

Small reactor volume

43.

Anaerobic reactor and design will determine the efficiency of the organic matter degradation through

a)

Sludge retention time in the reactor.

b)

The nature and composition of the organic matter to be removed.

c)

The intensity of mixing, hence contact between bacterial biomass and organic matter.

d)

Specific loading of organic matter with respect to bacterial sludge mass, and retention time.

44.

Types of microorganisms involved in the anaerobic treatment are

a)

facultative bacteria

b)

acidogens

c)

acetogens

d)

methanogens

45.

Example of treatment that uses attached biomass are

a)

AUF

b)

UASB

c)

AnRBC

d)

Clarigester

46.

Biogas that is being produced from the anaerobic process

a)

carbon dioxide

b)

oxygen

c)

methane

d)

ethane

47.

Solid retention time is

a)

average time the microbes remain within the reactor proportion to its growth rate

b)

hydraulic retention time

c)

BOD removal time needed in a reactor

d)

the time needed for the solid to settled down

48.

Anaerobic contact involves

a)

a reactor with a separator

b)

a reactor with multiple media

c)

a sludge blanket

d)

trays of media in a reactor

49.

Similar to FBR

a)

AEBR

b)

AF

c)

UASB

d)

UAF

50.

The main purpose of secondary wastewater treatment is

a)

to use several aerobic biological processes

b)

to remove the residual organics and suspended solids

c)

to separated microorganisms from the treated wastewater by sedimentation

d)

to remove suspended solid from the treated wastewater by sedimentation.

51.

_________________________________ are fixed-film reactors in that organisms are attached to support media. The support media are slowly rotating discs that are partially submerged in flowing wastewater in the reactor.

a)

Activated sludge

b)

Biofilter/Trickling Filter

c)

Clarifier

d)

Rotating Biological Contactors

52.

We should not throw cooking oil and paint down the drain because

a)

they break the pipe

b)

they harden and clog the pipe

c)

they flow through the drain freely

d)

None of these

53.

Anaerobic bacteria are added in the digester tank to decompose the organic matter to produce

a)

biogas

b)

Foul smell

c)

sludge

d)

sewage

54.

The organic impurities present in sewage are

a)

Bacteria

b)

phosphorus

c)

human faeces

d)

Nitrates

55.

The sludge is decomposed by (a)   bacteria.

56.
What is a disadvantage of fermentation as a process? 
a)
It produces too much ATP
b)
It only produces 2 ATP
c)
It occurs in the absence of oxygen
d)
It is only for quick bursts of energy
57.
Which compounds are produced by the two main types of fermentation? 
a)
NAD+ or ATP
b)
alcohol or lactic acid
c)
glucose or carbon dioxide
d)
ADP or ATP
58.
Why is yeast used to bake bread? 
a)
The waste gas, CO2, makes bread rise
b)
The alcohol produced makes bread dangerous
c)
The yeast consumes O2, causing bread to rise
59.
Which of the following is true about anaerobic respiration?
a)
It is a fast process
b)
It allows organisms to live in places with little oxygen
c)
It evolved before aerobic respiration
d)
all of the above
60.

Which of the following is/are products of wastewater treatment?

a)

Biogas

b)

Sludge

c)

Both biogas and sludge

d)

Aerator

61.

What is chemical formula for water?

a)

H2O

b)

HO2

c)

2HO

d)

HO

62.

What does the anaerobic digestion inside the digester?

a)

The agitator.

b)

Electricity

c)

Bacteria

d)

People

63.

What does anaerobic mean?

a)

with air

b)

without air

64.

What shape is the digester?

a)

Cube

b)

Square

c)

Cylinder

65.

Biogas is a renewable natural gas.

a)

True

b)

False

66.

Biogas is a product of anaerobic digestion of organic wastes. Point out facts on Biogas.

a)

can be used as fuel gas

b)

used in stationary engines to generate electricity

c)

free from CO2

d)

Consists of 70% CH4

e)

Biomethane can be processed from biogas

67.

anMBR is the latest technology applied in the wastewater treatment. This method uses

a)

Membrane as media

b)

microbes in suspension

c)

moving bed as media

d)

both media and suspension is being used

68.

Alcohol is a by product of which process?

a)

Hydrolysis

b)

Acidogenesis

c)

Acetogenesis

d)

Methanogenesis

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