Question | Answer | % Correct |
---|---|---|
Which of the following is the proper SVI range? | 70 to 150 | 100%
|
Which of the following is the purpose for laboratory tests? | All of the above | 100%
|
pH is important in the operation of which of the following? | All of the above | 100%
|
Which of the following tests are important in the control of an activated sludge process? | All of the above | 100%
|
Laboratory tests on an anaerobic digester may be used to determine ________. | anaerobic digestion | 100%
|
A flow-weighted “composite” sample is a ________. | combination of portions of samples collected at regular intervals and combined according to flow | 100%
|
Adequate chlorine residuals will ________. | destroy pathogenic organisms | 100%
|
Total suspended solids are ________. | determined by filtration | 100%
|
Laboratory tests on an anaerobic digester may be used to determine ________. | digester loading AND quality of supernatant and digested sludge | 100%
|
For anaerobic digesters, good sludge, supernatant, and gas production is realized at a pH of about ________. | 7.0 | 86%
|
The BOD test is ________. | a major parameter in quality control | 86%
|
“Grab” samples must be used to determine which of the following? | Chlorine residual | 86%
|
Good activated sludge will contain which of the following? | Large numbers of rotifers AND a high percentage of stalked ciliates | 86%
|
A low SVI may indicate ________. | sludge is settling too fast | 86%
|
A low oxygen uptake rate might indicate ________. | toxic wastes, low DO, or low BOD | 71%
|
The test that best indicates the condition of an anaerobic digester is are ________. | volatile acid concentration | 71%
|
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