Question 9025 of 234 · California Wastewater Operator Exam
A 1-liter sample of mixed liquor settles to 250 mL in 30 minutes. The MLSS is 2,000 mg/L. What is the sludge volume index (SVI)?
Exactly one answer is correct.
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Correct answer to question 9025
- C: 125 mL/g
Explanation
SVI = settled sludge volume (mL/L) x 1,000 / MLSS (mg/L) = 250 x 1,000 / 2,000 = 125 mL/g.
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