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Q » What is sludge volume index (SVI)?

John

03 Nov, 2025

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A » The Sludge Volume Index (SVI) is a key parameter used in wastewater treatment to evaluate the settling characteristics of activated sludge. It measures the volume occupied by 1 gram of sludge after 30 minutes of settling in a 1-liter cylinder. A low SVI indicates good settleability and compact sludge, whereas a high SVI suggests poor settling and fluffy sludge, crucial for process control and efficiency in water purification systems.

Michael

03 Nov, 2025

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A »The sludge volume index (SVI) is a measure of the settleability of sludge in wastewater treatment. It's calculated by measuring the volume occupied by 1 gram of dry sludge after 30 minutes of settling. A lower SVI indicates better settleability, while a higher SVI suggests poor settling characteristics.

David

03 Nov, 2025

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