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Texas Basic Waste Water Operations Ch#09 Fixed-Film Treatment - Statistics
General Stats
- This quiz has been taken 29 times
- The average score is 14 of 23
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| The microorganisms in fixed-film processes are attached to rocks or plastic media. | True | 88%
|
| The four basic parts of a trickling filter are the media, underdrain, tank walls/floor, and the distributor. | True | 88%
|
| Ponding is caused by ________. | all of the above | 75%
|
| Organic loading is the pounds per day of ________ per acre-feet or 1,000 ft3 of media. | BOD | 75%
|
| The zoogleal mass must remain dry or it will die. | 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%
|
| In time, some of the biological growth sloughs from the media and settles in the ________ clarifier. | secondary | 75%
|
| Some problems associated with trickling filter operation are filter flies, odor, ponding, plugged nozzles, clogged underdrains, and ________. | snails | 75%
|
| Zoogleal mass consists of aerobic, anaerobic, and facultative organisms including bacteria, protozoa, and fungi. | True | 75%
|
| The ________ test measures wastewater strength, filter efficiency, and effluent quality | BOD | 63%
|
| When the zoogleal mass grows thick, some of it sloughs off or breaks off, then settles in a secondary clarifier. | True | 63%
|
| Hydraulic loading is the volume of ________, including recirculation, applied to the filter. | water | 63%
|
| Odor results when treatment becomes ________. | anaerobic | 50%
|
| The media may be rock, steel, or molded plastic. | False | 50%
|
| The underdrain system of a trickling filter, located above the media, collects the filter effluent. | False | 50%
|
| The wastewater distributed on the media first passes through a final clarifier, but still contains about 65% of its organic matter. | False | 50%
|
| Sloughed material settled in the final clarifier is called humorous sludge. | False | 50%
|
| Filter flies live in an environment that alternates between ________ and ________. | wet/dry | 50%
|
| The purpose of the distributor is to support the media. | False | 38%
|
| Rotating biological contactors have a rotating shaft surrounded by ________ media. | plastic | 38%
|
| The media provides the surface area upon which a biological slime growth, called zoological mass, develops. | False | 0%
|
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