Transcription of Biological Nutrient Removal Operation
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Biological Nutrient Removal Operation
Biological Nutrient Removal OPERATIOND ecember 1, 2010 GeorgineGrissopPE, Characteristics Importantin BNR Process Design/ Operation Design Flow Quantity and Type of Influent BOD/COD Influent Nitrogen Influent Phosphorus Temperature Range Diurnal TKN Peaking Factors Alkalinity Dissolved Oxygen BOD/TKN Ratio BOD/P RatioBiological Nutrient Removal OperationRaw Sewage Characteristics Strong Sewage Better Than Weak Sewage Readily Biodegradable BOD is Important Seasonal, Wet Weather, and Weekend/Holiday Variations in Strength Can Affect Performance Weak Sewage Can Result In: Inadequate COD to Achieve Usual Degree of Denitrification Inability to Achieve/Maintain Anaerobic/Anoxic Conditions High Flows Lead To: Reduced Hydraulic Retention Time Increased Clarifier Solids LoadingBiological Nutrient Removal OperationRequirements for EBPR Readily biodegradable BOD / COD (VFAs) Relatively high BOD / TP Ratio (>20:1) Anaerobic Conditions (No & No Nitrates) No Toxics Sufficient cations-Mg & KBiological Nutrient Removal OperationBacteriaPPPPPPPPPPVFAsO2O2O2O2O 2O2O2O2O2O2 PPPPPPB acteria(P Enriched)AnaerobicAerobicPPPPPPV olatile Fatty AcidsRemoval of Phosphate from Wastewater General Get It Into A Solid and Then Remove The Solid When Trea
BIOLOGICAL NUTRIENT REMOVAL OPERATION December 1, 2010 Georgine Grissop PE, BCEE. grissopga@cdm.com
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