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WorksheetsBiogas, AD, and Wastewater
Total questions: 20
Worksheet time: 10mins
Biogas consist mainly carbon dioxide and methane.
True
False
Four (4) steps in anaerobic digestion are:
Acidogenesis
Hydrolysis
Photosynthesis
Acetogenesis
Methanogenesis
Mesophilic system operate at 25-45 degrees Celcius.
True
False
Below are factors affecting methane production, except:
pH
Presence of oxygen
Temperature
Presence of inhibitors
Slurry composition 30:1
Biogas produce..
heat only
electricity only
none
heat & electricity
What is the advantages of biogas?
It requires water
Using expensive machines to generate
Contains Impurities
Eco-Friendly
What does anaerobic mean?
with air
without air
Types of microorganisms involved in the anaerobic treatment are
facultative bacteria
acidogens
acetogens
methanogens
Biogas is a product of anaerobic digestion of organic wastes. Point out facts on Biogas.
can be used as fuel gas
used in stationary engines to generate electricity
free from CO2
Consists of 70% CH4
Biomethane can be processed from biogas
What happens in the biogas digesters?
aerobic bacteria processes organic waste
organic waste is turned into usable fertilizer
anaerobic bacteria processes organic waste
chlorine is added to disinfect biosolids
Which of the following is not a source of wastewater?
Sewers
Home
Industries
Hospitals
Which is the quality of wastewater?
Looks dirty
Smelly
Mixed with oil and sludge
All of these
Water pollution occurs when harmful and toxic waste, or chemicals, enter water bodies and gets dissolved.
True
False
Which of the following is not a form of contamination in the river?
Which one is the characteristic of wastewater?
Does not contain pathogenic micro-organisms
Safe to health
Used water from residential, commercial, and industrial areas
Free from breeding sites for insects, pests and micro organism
Which of the following sources is NOT categorized as domestic wastewater?
Manufacturing factories
Residential houses
Schools
Toilet and bathroom
'Easily degraded by microorganisms' is a characteristic of?
Non-biodegradable organics
Biodegradable organics
Inorganic compunds
Definition of BOD
Quantity of chemical utilized by micro-organisms to biologically degrade the organic matter in the water under anaerobic condition
Quantity of oxygen utilized by micro-organisms to biologically degrade the organic matter in the water under aerobic condition
Definition of COD
The quantity of equivalent oxygen needed to chemically oxidize the organic compound in sample, converted to carbon dioxide and water.
The quantity of equivalent chemical needed to biologically oxidize the organic compound in sample, converted to nitrogen and water.
