Texas Wastewater B exam FINAL PAPER 2026 COMPLETE
QUESTIONS AND SOLUTIONS GRADED A+
Primary Clarifiers In an activated sludge treatment system, primary treatment
processes include the:
Removal of Inorganic material from grit In a washing grit remover, the grit is moved slowly by screw
conveyors up an inclined channel in order to?
90% or above An efficient primary clarifier is expected to remove ? of the
influent settleable solids.
Adequate DO at surface at all times Proper operation of a facultative pond system requires that:,
True The amount of organic matter removed by a trickling filter is
mostly dependent on the recirculation ratio
Bulking In an activated sludge treatment plant, a Sludge Volume
Index (SVI) of 180 would indicate
Reseed The AB, Remove sludge from FC 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 Microscopic examination of a good-settling sludge should
show a predominance of:
Dissolved oxygen (DO) or oxygen obtained When nitrification takes place in the activated sludge process,
from food materials such as sulfate or nitrate facultative bacteria use
Primary clarifiers 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 One indication that an anaerobic digestion facility is improving
would be?
False 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 Besides disinfection, chlorination can be used in wastewater
,Control foaming, Aid in sludge treatment processes to?
450ml If released to atmospheric pressure, one part liquid chlorine
will expand to about?
, 8-12" Anaerobically digested sludge should be applied to a
drying bed to a depth of about?
QUESTIONS AND SOLUTIONS GRADED A+
Primary Clarifiers In an activated sludge treatment system, primary treatment
processes include the:
Removal of Inorganic material from grit In a washing grit remover, the grit is moved slowly by screw
conveyors up an inclined channel in order to?
90% or above An efficient primary clarifier is expected to remove ? of the
influent settleable solids.
Adequate DO at surface at all times Proper operation of a facultative pond system requires that:,
True The amount of organic matter removed by a trickling filter is
mostly dependent on the recirculation ratio
Bulking In an activated sludge treatment plant, a Sludge Volume
Index (SVI) of 180 would indicate
Reseed The AB, Remove sludge from FC 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 Microscopic examination of a good-settling sludge should
show a predominance of:
Dissolved oxygen (DO) or oxygen obtained When nitrification takes place in the activated sludge process,
from food materials such as sulfate or nitrate facultative bacteria use
Primary clarifiers 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 One indication that an anaerobic digestion facility is improving
would be?
False 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 Besides disinfection, chlorination can be used in wastewater
,Control foaming, Aid in sludge treatment processes to?
450ml If released to atmospheric pressure, one part liquid chlorine
will expand to about?
, 8-12" Anaerobically digested sludge should be applied to a
drying bed to a depth of about?
