ABC WASTEWATER {Activated sludge} Verified Multiple Choice and Conceptual Actual
Frequently Tested Exam Questions With Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update!!
Which best describes the activated sludge process
A. suspended growth, secondary treatment process, that
primarily removes dissolved organic solids, as well as set-
tleable, and non-settleable suspended solids. Answer A. suspended growth, secondary treatment
process, that primarily removes dissolved organic solids,
B. Log growth, advance treatment process, that removes as well as settleable, and non-settleable suspended solids.
inorganic solids but not settle able solids.
C. Stationary growth, primary treatment process, that re-
moves only dissolved organic solids.
True
True or false- Splitter boxes separate the influent flow into
multiple streams that are routed into the bank of clarifiers.
True or false - Step feeding is the process, of feeding
wastewater throughout various points , in the aeration True
basin
Some of the dissolved solids, in the influent, may pass
What is a Downside , of step feeding in the aeration basin? through the aeration basin, too rapidly, and show up in
the effluent as BOD
What problem could occur by allowing sludge to reside in Nitrogen gas will be released as part of the biological or
secondary clarifier to long? Denitrification process causing sludge to rise
Reduces the MLSS, and reduces the mass of organisms,
What is the purpose of wasting?
in the system
1, Influent Feeding,
2,Dissolved Oxygen,
3, mixing
1/8
, 4, RAS Pumping Rate
List the 6 activated sludge process Controls 5, Mixed Liquor Concentration
6, F:M ratio
smaller, package-type plants, and complete oxidation sys-
What type of plants, is the extended aeration often used?
tems.
discharge contains higher effluent suspended solids, than
What is the downside, of extended aeration?
found in conventional loadings.
Add dissolved oxygen, and mixing of the mixed liquor and
What are Two purposes of Aeration?
wastewater in the aeration tank.
Two methods used to disperse oxygen from the air to the
Surface Aeration and Dittused Aeration
microorganisms.
Simulates the settling of activated sludge in the secondary
What is the purpose of the settleometer test?
clarifier
(plants and some bacteria) use inorganic materials, for
Describe Autotrophic organisms
energy, and growth.
Describes the growing, or coming together of small scat-
Agglomeration tered particles into larger flocs, or particles, which settle
rapidly
Describes the state, in which the water, does not contain
Anoxic condition dissolved oxygen (DO), also called an oxygen deficient
condition
Describes the conditions whereby microorganisms, and
bacteria, treating the wastes, are attached to the media,
Attached Growth Process
in the reactor. Examples: Trickling filters, and rotating bio-
logical contactors
Standard test conditions, include dark incubation, at, 20°C
BOD Test
, last usually five days
Cationic Polymer a polymer, having positively charged groups of ions
Chemical Oxygen Demand (COD) 2/8
Frequently Tested Exam Questions With Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update!!
Which best describes the activated sludge process
A. suspended growth, secondary treatment process, that
primarily removes dissolved organic solids, as well as set-
tleable, and non-settleable suspended solids. Answer A. suspended growth, secondary treatment
process, that primarily removes dissolved organic solids,
B. Log growth, advance treatment process, that removes as well as settleable, and non-settleable suspended solids.
inorganic solids but not settle able solids.
C. Stationary growth, primary treatment process, that re-
moves only dissolved organic solids.
True
True or false- Splitter boxes separate the influent flow into
multiple streams that are routed into the bank of clarifiers.
True or false - Step feeding is the process, of feeding
wastewater throughout various points , in the aeration True
basin
Some of the dissolved solids, in the influent, may pass
What is a Downside , of step feeding in the aeration basin? through the aeration basin, too rapidly, and show up in
the effluent as BOD
What problem could occur by allowing sludge to reside in Nitrogen gas will be released as part of the biological or
secondary clarifier to long? Denitrification process causing sludge to rise
Reduces the MLSS, and reduces the mass of organisms,
What is the purpose of wasting?
in the system
1, Influent Feeding,
2,Dissolved Oxygen,
3, mixing
1/8
, 4, RAS Pumping Rate
List the 6 activated sludge process Controls 5, Mixed Liquor Concentration
6, F:M ratio
smaller, package-type plants, and complete oxidation sys-
What type of plants, is the extended aeration often used?
tems.
discharge contains higher effluent suspended solids, than
What is the downside, of extended aeration?
found in conventional loadings.
Add dissolved oxygen, and mixing of the mixed liquor and
What are Two purposes of Aeration?
wastewater in the aeration tank.
Two methods used to disperse oxygen from the air to the
Surface Aeration and Dittused Aeration
microorganisms.
Simulates the settling of activated sludge in the secondary
What is the purpose of the settleometer test?
clarifier
(plants and some bacteria) use inorganic materials, for
Describe Autotrophic organisms
energy, and growth.
Describes the growing, or coming together of small scat-
Agglomeration tered particles into larger flocs, or particles, which settle
rapidly
Describes the state, in which the water, does not contain
Anoxic condition dissolved oxygen (DO), also called an oxygen deficient
condition
Describes the conditions whereby microorganisms, and
bacteria, treating the wastes, are attached to the media,
Attached Growth Process
in the reactor. Examples: Trickling filters, and rotating bio-
logical contactors
Standard test conditions, include dark incubation, at, 20°C
BOD Test
, last usually five days
Cationic Polymer a polymer, having positively charged groups of ions
Chemical Oxygen Demand (COD) 2/8
