ABC Wastewater Treatment Grade 3 Exam
BOD incubation period and 5 days at 20 C
temperature
Time to hold BOD sample in fridge 48 hours 4 C
What preservative do you add to store Sulfuric Acid H2SO4
COD samples?
Ammonia incubation period and 28 days at 4 C
temperature
What preservative do you add to store Sulfuric Acid H2SO4
Ammonia
Fecal Coliform holding time is 8 hours
A drip trap for an anaerobic digester Removes condensate in the gas piping system
does what
Chemical used to raise pH in a digester Sodium bicarbonate or Lime
What causes the pH in an anaerobic Increase in volatile/alkalinity ratio
digester to decrease
Heterotrophs feed on Organic carbon
Autotrophs feed on Inorganic carbon. They produce their own nutrients.
, ABC Wastewater Treatment Grade 3 Exam
Ensure accurate lab results through duplicity
Which is larger, BOD or COD? COD is larger
Phosphorous removal ratio of 300:5:1 COD : Nitrogen : Phosphorous
Phosphorous removal ratio of 100:5:1 BOD : Nitrogen : Phosphorous
Pump efficiency with 86% pump power 73.96%
and 86% motor functionality
First stage of an upset digester? Volatile acids increase, alkalinity decrease
Digester temperature can be raised by 1F
how much per day?
Average temperature of an anaerobic 95 F
digester?
Belt Press Thickener solids are thin so decrease the belt retention time
you
Centrifugal pump temperature is hot so Cool down
operator cuts flow to 50%, temperature
will
Advantage of egg shaped digester over less scum accumulation
cylindrical
BOD incubation period and 5 days at 20 C
temperature
Time to hold BOD sample in fridge 48 hours 4 C
What preservative do you add to store Sulfuric Acid H2SO4
COD samples?
Ammonia incubation period and 28 days at 4 C
temperature
What preservative do you add to store Sulfuric Acid H2SO4
Ammonia
Fecal Coliform holding time is 8 hours
A drip trap for an anaerobic digester Removes condensate in the gas piping system
does what
Chemical used to raise pH in a digester Sodium bicarbonate or Lime
What causes the pH in an anaerobic Increase in volatile/alkalinity ratio
digester to decrease
Heterotrophs feed on Organic carbon
Autotrophs feed on Inorganic carbon. They produce their own nutrients.
, ABC Wastewater Treatment Grade 3 Exam
Ensure accurate lab results through duplicity
Which is larger, BOD or COD? COD is larger
Phosphorous removal ratio of 300:5:1 COD : Nitrogen : Phosphorous
Phosphorous removal ratio of 100:5:1 BOD : Nitrogen : Phosphorous
Pump efficiency with 86% pump power 73.96%
and 86% motor functionality
First stage of an upset digester? Volatile acids increase, alkalinity decrease
Digester temperature can be raised by 1F
how much per day?
Average temperature of an anaerobic 95 F
digester?
Belt Press Thickener solids are thin so decrease the belt retention time
you
Centrifugal pump temperature is hot so Cool down
operator cuts flow to 50%, temperature
will
Advantage of egg shaped digester over less scum accumulation
cylindrical
