Chapter Seven Test
This test will cover Chapter Seven (7) 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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Most bacteria in wastewater treatment processes are believed to make up approximately __________ phosphorous by weight. *
More bugs (higher MLSS concentration) always means higher oxygen demand. *
__________ are generally either oxidized or stored quickly in the aeration basin, often with in the first 15-30 minutes. *
Positive ORP values generally correlate with __________ dissolved oxygen (DO) values. *
__________ is a strong oxidizer which may be added to reduce organic acids once they are formed. *
Reducing SRT (sludge retention time) in the primary clarifiers may be accomplished by __________. *
__________ basin configurations are most suitable for influents containing elevated concentrations of organic acids. *
High SRT filament types may often be discouraged by __________ the wasting rate. *
__________ is sometimes supplemented as a carbon source when logistical for treatment plants with low organic loading rates to support the biomass. *
____________ filament types are commonly attributed to cause/contribute to foaming events in biological wastewater treatment processes. *
It is suspected that septicity, rather than simply the oil and grease concentrations are a factor for growth of FOG filament types. *
Addition of defoamer successfully destroys foaming filamentous bacteria and stops their growth. *
New cellular growth is shunted to __________ when there are not readily available nutrients present. *
If concentrations of mono-valent cations such as sodium and potassium are high in proportion to concentrations of multi-valent cations such as calcium and magnesium __________ is a possible outcome. *
__________ would generally be an ideal dosing location for chlorination to control filamentous bacteria. *
The predominant use for DAF (dissolved air floatation) units would most likely be __________. *
__________ cells are often successful in reducing certain filament types however may also be unsuccessful if organically overloaded or underloaded. *
There is a limit to operational intervention and in certain instances upgrades are needed to maintain consistent operational treatment performance. *
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