Statistics for Texas Basic Waste Water Operations Ch#09 Fixed-Film Treatment

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This quiz has been taken 6 times
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Answer Stats

Question	Answer	% Correct
The zoogleal mass must remain dry or it will die.	False	100%
The microorganisms in fixed-film processes are attached to rocks or plastic media.	True	100%
When the zoogleal mass grows thick, some of it sloughs off or breaks off, then settles in a secondary clarifier.	True	100%
The four basic parts of a trickling filter are the media, underdrain, tank walls/floor, and the distributor.	True	100%
Ponding is caused by ________.	all of the above	75%
The underdrain system of a trickling filter, located above the media, collects the filter effluent.	False	75%
The purpose of the distributor is to support the media.	False	75%
Filters are classified according to ________ and ________ loading.	hydraulic/organic	75%
Biological slime (microorganisms) grows on the surface of the ________, consuming the organic matter (BOD) as the RBC rotates in the wastewater.	media	75%
Fixed-film processes include trickling filters and ________.	RBC's	75%
Some problems associated with trickling filter operation are filter flies, odor, ponding, plugged nozzles, clogged underdrains, and ________.	snails	75%
Organic loading is the pounds per day of ________ per acre-feet or 1,000 ft3 of media.	BOD	50%
The media may be rock, steel, or molded plastic.	False	50%
In time, some of the biological growth sloughs from the media and settles in the ________ clarifier.	secondary	50%
Zoogleal mass consists of aerobic, anaerobic, and facultative organisms including bacteria, protozoa, and fungi.	True	50%
Hydraulic loading is the volume of ________, including recirculation, applied to the filter.	water	50%
Filter flies live in an environment that alternates between ________ and ________.	wet/dry	50%
Odor results when treatment becomes ________.	anaerobic	25%
The ________ test measures wastewater strength, filter efficiency, and effluent quality	BOD	25%
Sloughed material settled in the final clarifier is called humorous sludge.	False	25%
The wastewater distributed on the media first passes through a final clarifier, but still contains about 65% of its organic matter.	False	25%
Rotating biological contactors have a rotating shaft surrounded by ________ media.	plastic	25%
The media provides the surface area upon which a biological slime growth, called zoological mass, develops.	False	0%