L19_Wastewater_Sludge_Stabilization

L19_Wastewater_Sludge_Stabilization - Wastewater Sludge...

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Wastewater Sludge Stabilization Last Update Fall 2005
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Terminology Percent Solids 10,000 mg/l=1 percent solids SRT (Sludge Residence Time) Methane (natural gas)
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Sludge Production-Wastewater Grit Chambers Primary Sedimentation Secondary Clarification Sludge Processing
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Primary Clarification Biological Treatment Secondary Clarification Grit Chamber Landfill Sludge Stabilization Composting?
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Sludge Stabilization-Objectives Reduce Organic Content Eliminate Odor Improve Physical Characteristics Decrease Pathogen Counts Public Safety Facilitates Land Application
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Treatment Sequence Sludge thickening (optional) Stabilization Disinfection Conditioning/Dewatering Drying (optional) Transport for Disposal
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Sludge Thickening Gravity type (Tank) Commonly used small systems Gravity Belts Common in large facilities Dissolved Air Flotation
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Percent Solids Activated sludge in tank <1% Settled Activated Sludge <2%
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L19_Wastewater_Sludge_Stabilization - Wastewater Sludge...

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