wastewater nitrogen removal

7/28/2019 Wastewater Nitrogen Removal

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Wastewater Nitrogen Removal

Bill McAllister, P.E.

AMI Conference on Worker Safety, Human Resources, and the Environment

Kansas City, MO

March 9, 2011


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Presentation Outline

Background

Biological Nitrogen Removal (BNR)

Case Study-Beef Slaughter & Fab Facility

Proprietary BNR Systems Evaluation Basis of Design

Final Process Design

Supplemental Carbon Evaluation Circular Vs Rectangular Basins (Common Wall)

Wastewater Reuse Considerations


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Background

Regulatory Focus on Nutrient Reductions

Nitrogen & Phosphorus

Dead Zones in Coastal Waters

State Issues Drinking Water Protection

Recreation Use Protection

Aquatic Life Protection


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Background

Nitrogen Removal Systems

Biological Nitrogen Removal (BNR) Breakpoint Chlorination

Ammonia Stripping

Ion Exchange Membrane Filtration

Advanced Oxidation


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Biological Nutrient Removal

Biological Nitrogen Removal Mechanisms

Biological Conversion of Nitrogen to Nitrogen Gas Disposal of Biological Waste Sludge

Many BNR Configurations and ProprietarySystems

Conventional Bardenpho Process (Four Stage)


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Biological Nutrient Removal

Four Stage Bardenpho Process


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Case Study

Large Beef Slaughter and Fab Facility

Wastewater Discharge to a Low Flow Stream

Development of a Long-Term Wastewater Plan

Reliable Removal of Ammonia & Nutrients

Provide a Wastewater Quality for Future BeneficialReuse For Plant, Agriculture, and Other Water Needs

Cost Effective


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Case Study

Reviewed & Screened Many PotentialProprietary BNR Systems and Conventional

Activated Sludge

Owner Selected Five Proprietary BNR Systemsto Further Evaluate and Visit Full-Scale

Facilities. Siemens Orbal Process

Schreiber Process

Eimco Carrousel Process

WesTech OxyStreamProcess

Parkson Biolac Process


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Case Study

Siemens Orbal Process


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Case Study

Schreiber Process


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Case Study

Eimco Carrousel & WesTech OxyStream Processes


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Case Study

Parkson Biolac Process


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Case Study

Influent Wastewater Loadings

(Anaerobic Lagoon Effluent)

Parameter Daily Average

Flow, MGD 3.6

CBOD5, mg/L 300TSS, mg/L 800

Ammonia Nitrogen, mg/L 190

Alkalinity, mg/L 1,100


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Case Study

Effluent Quality Requirements

Parameter Value

BOD5, mg/L 16

TSS, mg/L 30pH, s.u 6.0 to 9.0

Ammonia Nitrogen, mg/L 1.2

Nitrite+Nitrate Nitrogen, mg/L 10


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Case Study

Final Process Selection

Conventional Bardenpho Process (Four Stage)


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Case Study

Final Process Size

Process Unit Value

Pre-Anoxic Basin 3,000,000 Gallons

Aeration Basins (each) 3,000,000 Gallons

Minimum Internal Recycle Flow 10,000 GPM

Post-Anoxic Basin 900,000 Gallons

Post-Aeration Basin 50,000 Gallons

Final Clarifiers (each) 90 ft. Diameter

Aerated Sludge Storage & Thickening Basin 900,000 Gallons

Belt Filter Press Capacity 35,000 dry lbs/day


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Case Study

Preliminary Site Plan


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Case Study

Supplemental Carbon Sources

Wastewater Methanol

Proprietary Products

Micro-C (EOS)

BioCarb DN

Unicarb DN (Univar)

Brenntag (Chematron)

Biodiesel Glycerol Waste Other Industrial Byproducts

Must Be Low Nitrogen Product


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Case Study

Methanol Vs Wastewater

Owner Requested a Cost Comparison to Use Either Chemical(Methanol) or Wastewater for the Supplemental Carbon Source(Denitrification Use)

Developed Conceptual Capital and O&M Cost Opinions

Use of Existing Covered Anaerobic Lagoon

Estimated a 2 to 3 Yr Simple Payback For Wastewater

O&M Costs Included Costs for Chemical, Biogas Loss, and Power

Option Capital Cost, $ Annual O&M Cost, $

Methanol 600,000 530,000

Wastewater 1,300,000 230,000


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Case Study

Circular Vs Square Process Basins Owner Requested a Cost Comparison to Construct Four

Circular or Rectangular Basins (common wall). Complete Preliminary Structural Design

Received Construction Costs from a Contractor

Four Circular Basins $4.3 Million Four Square Basins $5.7 Million

Savings For Circular Basins $1.4 Million

Costs Did Not Include:

Excavation and Backfill

Permits

Taxes


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Case Study

Water Reuse Considerations

Project will Include Effluent Water Reuse. Beef Plant Use

WWTF Use

Irrigation (Future)

Chlorinate Beef Plant and WWTF Reuse Water

Beef Plant Uses

Non-Contact Condenser Water

Livestock Pens Washdown Inedible Clean-Up Water

Slaughter & Fab Clean-Up Water (Future???)


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Questions

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