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3 Cards in this Set
- Front
- Back
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Before treating suspected bulking you should confirm that the problem is actually bulking and not another cause. Which of the following best describes bulking?
(a) high sludge blanket in final; good settling sludge with clear superuanant; low SVI; and low solids concentration and the RAS (b) filamentous organisms in sludge; low SVI and high sludge blanket in final (c) filamentous organisms in sludge; high SVI and high solids concentration in the RAS (d) low solids concentration in RAS; sludge settles good with clear supernatant; SVI higher than 150 and high sludge blanket in final |
(d) low solids concentration in RAS; sludge settles good with clear supernatant; SVI higher than 150 and high sludge blanket in final
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If nitrification is desired, why is a MCRT of about ten days a minimum amount of time required?
(a) because it takes 8-10 days for the nitrites to break through the cell walls (b) because bacteria which utilize carboneneous compounds grow slower than nitrifying bacteria (c) to allow enough time for all the organisms to reach the endogenous stage (d) to prevent denitrification from occurring (e) to allow time for the ammonia to be "blown off" |
(c) to allow enough time for all the organisms to reach the endogenous stage
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The most important purpose for using the F/M process control method is:
(a) to ensure a proper balance between MLSS and organic loading (b) to determine the MLVSS ratio (c) to maintain a proper food to methane ratio (d) to maintain a facultative growth state (e) to determine the expected organic demand |
(a) to ensure a proper balance between MLSS and organic loading
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