Biological Phosphorous Removal An Operator’s Guide Glenn Burkhardt, PE Engineered Logic LLC
What is Bio P Removal? • It is NOT a mysterious brown box
Bio P Model • Two Step Process (Anaerobic then Aerobic) Acetate + Poly- P → PHA + ATP → H20 + CO2 ← Anaerobic → ← Aerobic →
Bio P Process Discussion • Anaerobic Step • Carbon Conversion to Volatile Fatty Acids • Volatile Fatty Acid Conversion to Acetate • Acetate & Poly-P Conversion to PHA & ATP PHA Polyhydroxyalkanoic Acid ATP Adenosine Triphosphate • Aerobic Step • PHA & ATP Conversion to Glycogen, H2O & CO2
Phosphorous Uptake Diagram Anaerobic→← Aerobic 60 50 40 30 20 10 0 0 25 50 75 100 150 200 300
Treatment Process Diagram • A/O Process
Anoxic Zone
Aerobic Zone
Important Design Parameters • BOD to P ratio > 20 • COD to P ratio > 45 • VFA to P ratio > 7 • Anaerobic HRT 1 to 2 hours • Aerobic SRT 15 to 20 days • Nitrate Loading < O2 Demand of Waste
Important Operating Parameters • Anaerobic Zone pH 8.0 to 8.5 • Anaerobic Zone ORP -100 to -200 mV • Aerobic Zone pH 7.0 to 7.5 • Aerobic Zone ORP +100 to +300 mV • Return Sludge Rate Manage ML Conc. Maintain ORP Limits
pH and ORP Monitoring
Bio P Troubleshooting • Phosphorous Increasing (normal NH3 & SS) • P uptake could be due to low VFA production • ATP production could be affected by anaerobic pH • Nitrates could be affecting anaerobic conditions • Parameters to Check • VFA to P ratio (greater than 7) • Anaerobic reactor pH (8.0 to 8.5) • Anaerobic reactor ORP (-100 to -200 mV)
Bio P Troubleshooting • Rapid P Increase (normal NH3 & SS) • Side Stream with High P Being Introduced • P Release from Clarifier Sludge Blanket • P Release from High Solids Retention time • Parameters to Check • P Concentration to Anaerobic Reactor • ORP of Sludge Blanket ( 0 to 100 mV is the goal ) • Soluble P of Mixed Liquor ( < 0.5 mg/l is the goal )
Bio P Troubleshooting • High Effluent P ( high effluent SS) • Could be due to High Effluent Solids • Could be due to P Release • Could be due to Aerobic Reactor pH • Parameters to Check • Check P of Filtered Effluent Sample • Check P Profile of Anaerobic and Aerobic Reactors • Check pH of Anaerobic and Aerobic Reactors
Bio P Performance • Improved Solids Settling Characteristics • Less Risk of Aerobic Reactor Foaming • More Stable Under Shock Loading Conditions • No Chemicals Required • Less Sludge Production • Effluent P Typically 0.2 to 0.5 mg/l • Effluent NH3 Typically < 0.5 mg/l
Questions? Glenn Burkhardt, PE Engineered Logic LLC
Understanding the role of Tetrasphaera in enhanced biological phosphorus
Use of Compressed Gas For Cost Effective Mixing and Biological Nutrient
Monitoring of phosphorous fractions Understanding the hydro-geochemical
7/22/2020 Operation of Biological and Chemical Phosphorus Removal Systems
Opportunities for improved nutrient removal and recovery from municipal
SHARQ Guide: SHARQ Guide: Finding relevant biological data Finding relevant
BIOLOGICAL REMOVAL OF HYDROGEN SULPHIDE FROM LANDFILL SITE BIOGAS Rania
Evaluating Step-feed for Enhanced Biological Phosphorus Removal (EBPR) in
PIC/S Guide to GMP PE009-13 Key Changes to Annex 2 Manufacture of Biological
Fracture Control 2/14/2019 New AASHTO Guide Specs. For Removal of FCM
Phase 1 Single and Multiple Ascending Dose Study of the Safety, Tolerability,
Evaluating Professional Cleaning of the Commercial Built Environment for
Airline Cleaning Verification Hygiena ATP Cleaning Verification Overview
Energy in the Cell ATP= Most commonly used energy in the cell Adenosine
A New genera tjon of hy giene moni t oring LuciPac A3 Importr: Impex
Report of a Workshop on Dose-Response Approaches for Nuclear Receptor-
ATP BIOLUMINESCENCE A NEW LIGHT FOR MONITORING MICROORGANISMS ON DRINKING
Technologies and Methodologies Used in CIP Research Ariel Garsow Graduate
Building Blocks of Bodybuilding Nutritional aspects of Bodybuilding.
United States Court of Appeals for the Federal Circuit
SRB Project Sulfite Reducing Bacteria Primary Chilled Water Loop Product:
Rehabilitation of Groundwater Recovery Wells Improved Treatment Technology