Texas Wastewater B exam with correct
answers
Primary Clarifiers - ** VERIFIED ANSWERS **✔✔In an activated sludge treatment system,
primary treatment processes include the:
Removal of Inorganic material from grit - ** VERIFIED ANSWERS **✔✔In a washing grit
remover, the grit is moved slowly by screw conveyors up an inclined channel in order to?
90% or above - ** VERIFIED ANSWERS **✔✔An efficient primary clarifier is expected to
remove ? of the influent settleable solids.
Adequate DO at surface at all times - ** VERIFIED ANSWERS **✔✔Proper operation of a
facultative pond system requires that:,
True - ** VERIFIED ANSWERS **✔✔The amount of organic matter removed by a trickling
filter is mostly dependent on the recirculation ratio
Bulking - ** VERIFIED ANSWERS **✔✔In an activated sludge treatment plant, a Sludge
Volume Index (SVI) of 180 would indicate
Reseed The AB, Remove sludge from FC - ** VERIFIED ANSWERS **✔✔The purpose of
returning the solids from the bottom of the clarifier to the aeration tank in the activated
sludge process is to
Free swimmer rotifers stalked ciliates - ** VERIFIED ANSWERS **✔✔Microscopic
examination of a good-settling sludge should show a predominance of:
, Dissolved oxygen (DO) or oxygen obtained from food materials such as sulfate or nitrate - **
VERIFIED ANSWERS **✔✔When nitrification takes place in the activated sludge process,
facultative bacteria use
Primary clarifiers - ** VERIFIED ANSWERS **✔✔In an activated sludge process, the results
of a mixed liquor settling test indicate that the supernatant of the mixed liquor sample is
clear, but the supernatant of the plant effluent sample is turbid. These test results indicate
that the problem is occurring in the?
Low C02 high Methane - ** VERIFIED ANSWERS **✔✔One indication that an anaerobic
digestion facility is improving would be?
False - ** VERIFIED ANSWERS **✔✔The terms "low rate" and "high rate" when used in
reference to the anaerobic digester refer to the rate of stabilization of the raw sludge?
Control odor, Reduce BOD ,Control foaming, Aid in sludge - ** VERIFIED ANSWERS
**✔✔Besides disinfection, chlorination can be used in wastewater treatment processes to?
450ml - ** VERIFIED ANSWERS **✔✔If released to atmospheric pressure, one part liquid
chlorine will expand to about?
8-12" - ** VERIFIED ANSWERS **✔✔Anaerobically digested sludge should be applied to a
drying bed to a depth of about?
Not to create a negative pressure in the anaerobic digester and to prevent coning of sludge -
** VERIFIED ANSWERS **✔✔Sludge from a digester should be slowly drawn to a drying
bed in order to?
Recharge Water supply, keep saline out of groundwater stop ground Substance - **
VERIFIED ANSWERS **✔✔Direct aquifer recharge of treated effluent can be used to?
answers
Primary Clarifiers - ** VERIFIED ANSWERS **✔✔In an activated sludge treatment system,
primary treatment processes include the:
Removal of Inorganic material from grit - ** VERIFIED ANSWERS **✔✔In a washing grit
remover, the grit is moved slowly by screw conveyors up an inclined channel in order to?
90% or above - ** VERIFIED ANSWERS **✔✔An efficient primary clarifier is expected to
remove ? of the influent settleable solids.
Adequate DO at surface at all times - ** VERIFIED ANSWERS **✔✔Proper operation of a
facultative pond system requires that:,
True - ** VERIFIED ANSWERS **✔✔The amount of organic matter removed by a trickling
filter is mostly dependent on the recirculation ratio
Bulking - ** VERIFIED ANSWERS **✔✔In an activated sludge treatment plant, a Sludge
Volume Index (SVI) of 180 would indicate
Reseed The AB, Remove sludge from FC - ** VERIFIED ANSWERS **✔✔The purpose of
returning the solids from the bottom of the clarifier to the aeration tank in the activated
sludge process is to
Free swimmer rotifers stalked ciliates - ** VERIFIED ANSWERS **✔✔Microscopic
examination of a good-settling sludge should show a predominance of:
, Dissolved oxygen (DO) or oxygen obtained from food materials such as sulfate or nitrate - **
VERIFIED ANSWERS **✔✔When nitrification takes place in the activated sludge process,
facultative bacteria use
Primary clarifiers - ** VERIFIED ANSWERS **✔✔In an activated sludge process, the results
of a mixed liquor settling test indicate that the supernatant of the mixed liquor sample is
clear, but the supernatant of the plant effluent sample is turbid. These test results indicate
that the problem is occurring in the?
Low C02 high Methane - ** VERIFIED ANSWERS **✔✔One indication that an anaerobic
digestion facility is improving would be?
False - ** VERIFIED ANSWERS **✔✔The terms "low rate" and "high rate" when used in
reference to the anaerobic digester refer to the rate of stabilization of the raw sludge?
Control odor, Reduce BOD ,Control foaming, Aid in sludge - ** VERIFIED ANSWERS
**✔✔Besides disinfection, chlorination can be used in wastewater treatment processes to?
450ml - ** VERIFIED ANSWERS **✔✔If released to atmospheric pressure, one part liquid
chlorine will expand to about?
8-12" - ** VERIFIED ANSWERS **✔✔Anaerobically digested sludge should be applied to a
drying bed to a depth of about?
Not to create a negative pressure in the anaerobic digester and to prevent coning of sludge -
** VERIFIED ANSWERS **✔✔Sludge from a digester should be slowly drawn to a drying
bed in order to?
Recharge Water supply, keep saline out of groundwater stop ground Substance - **
VERIFIED ANSWERS **✔✔Direct aquifer recharge of treated effluent can be used to?
