Chapter Eight Test
This test will cover Chapter Eight (8) content and give a summary of your answers after completion. All blanks below are indicated by __________ ten (10) blanks, this number is arbitrary and should not be used to indicate answers by selections of allowed blanks.
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“Slime bulking” is diagnosed when elevated amounts of _______________ are recognized to impact the settling characteristics of the sludge. *
Zoogloea bacteria types are often discouraged by _________________ the MLSS concentration. *
The ___________ test is widely accepted to help diagnose elevated polysaccharide causes between low nutrient availability and zoogloea bacteria type abundance. *
The actual required BOD:N:P ratio has many factors and sometimes adequate nutrients may be available even if BOD:N:P ratio shows lesser nutrients than textbook requirements. *
Overdosing phosphorous supplements leads to __________. *
__________ is an often overlooked potential cause of pin floc. *
If DNA testing (16S rRNA community sequencing) shows high read % from the Patescibacteria phylum this is a good clue that pin floc may be caused by __________. *
Nitrogen gas entrapment from denitrification may cause SVI (sludge volume index) values to be elevated in certain instances. *
Denitrification may occur within the interior of the floc even if there are positive DO (dissolved oxygen) concentration values in the aeration basin. *
__________ is/are often a good “band-aid” to help discourage dispersed growth and related turbidity within the supernatant. *
Microthrix filament types often compete well at __________ temperature values. *
__________ foams may often be diagnosed through visual observation. *
__________ values of < 60 dynes/cm are a recognized cause of foaming. *
After a significantly stressful event that causes bacteria to die in activated sludge systems __________ are often the first microbe type to re-emerge. *
Quaternary ammonia compounds (QACs) concentrations in the mixed liquor above __________ mg/L may potentially interfere with treatment goals and/or sludge quality. *
__________ is the food source for nitrifying bacteria. *
__________ often interferes with disinfection through major increases to the chlorine demand to achieve breakpoint chlorination/ free chlorine residuals. *
__________ may often be viewed at 1000x phase contrast oil immersion microscopy. *
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