Energy Efficient Wastewater Treatment Emily Gonthier & Jennifer - - PowerPoint PPT Presentation

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Energy Efficient Wastewater Treatment Emily Gonthier & Jennifer - - PowerPoint PPT Presentation

Oct 31, 2022 148 likes •439 views

Energy Efficient Wastewater Treatment Emily Gonthier & Jennifer Lawrence April 30, 2018 Outline ReNUWIt What is it? Our Partnership through ReNUWIt Research Municipal Wastewater Treatment 101 Anammox Broader

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Energy Efficient Wastewater Treatment

Emily Gonthier & Jennifer Lawrence April 30, 2018

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  • ReNUWIt
  • What is it?
  • Our Partnership through ReNUWIt
  • Research
  • Municipal Wastewater Treatment 101
  • Anammox
  • Broader Impacts

Outline

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2

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ReNUWIt – REU Program

Summer 2015 – Emily joins the lab group as an REU, with Jennifer as her mentor

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ReNUWIt – REU Program

Summer 2015 – Emily joins the lab group as an REU, with Jennifer as her mentor Fall 2016 – Emily joins the lab group as a PhD student!

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Municipal Wastewater Treatment 101

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Municipal Wastewater Treatment 101

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Municipal Wastewater Treatment 101

Raw Sewage Characteristics

Pollutant Parameter Influent Concentration Treatment Requirement 5

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Municipal Wastewater Treatment 101

Raw Sewage Characteristics

Pollutant Parameter Influent Concentration Treatment Requirement Solids TSS 100 – 350 mg/L 30 mg/L 5

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Municipal Wastewater Treatment 101

Raw Sewage Characteristics

Pollutant Parameter Influent Concentration Treatment Requirement Solids TSS 100 – 350 mg/L 30 mg/L Oxygen- demanding substances BOD 100 – 350 mg/L 30 mg/L 5

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Municipal Wastewater Treatment 101

Raw Sewage Characteristics

Pollutant Parameter Influent Concentration Treatment Requirement Solids TSS 100 – 350 mg/L 30 mg/L Oxygen- demanding substances BOD 100 – 350 mg/L 30 mg/L Pathogens Fecal Coliform 105 – 108 CFU/mL 500 CFU/mL 5

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Municipal Wastewater Treatment 101

Raw Sewage Characteristics

Pollutant Parameter Influent Concentration Treatment Requirement Solids TSS 100 – 350 mg/L 30 mg/L Oxygen- demanding substances BOD 100 – 350 mg/L 30 mg/L Pathogens Fecal Coliform 105 – 108 CFU/mL 500 CFU/mL Nutrients Nitrogen 30 – 50 mg/L varies Phosphorus 20 – 40 mg/L varies 5

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Municipal Wastewater Treatment 101

Raw Sewage Characteristics

Pollutant Parameter Influent Concentration Treatment Requirement Solids TSS 100 – 350 mg/L 30 mg/L Oxygen- demanding substances BOD 100 – 350 mg/L 30 mg/L Pathogens Fecal Coliform 105 – 108 CFU/mL 500 CFU/mL Nutrients Nitrogen 30 – 50 mg/L varies Phosphorus 20 – 40 mg/L varies Additional chemicals

  • 5
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Municipal Wastewater Treatment 101

Raw Sewage Characteristics

Pollutant Parameter Influent Concentration Treatment Requirement Solids TSS 100 – 350 mg/L 30 mg/L Oxygen- demanding substances BOD 100 – 350 mg/L 30 mg/L Pathogens Fecal Coliform 105 – 108 CFU/mL 500 CFU/mL Nutrients Nitrogen 30 – 50 mg/L varies Phosphorus 20 – 40 mg/L varies Additional chemicals

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Nitrogen Removal Technologies 101

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Nitrogen Removal Technologies 101

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Nitrogen Removal Technologies 101

  • Nitrification
  • Denitrification

Conventional Nitrogen Removal

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Nitrogen Removal Technologies 101

  • Nitrification
  • Denitrification

Conventional Nitrogen Removal

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Anammox / Deammonification

  • Partial nitritation
  • Anaerobic ammonium oxidation (anammox)
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The Anammox Process

Strengths

Decreased aeration demands

  • 60% reduction in energy consumption

Decreased organic carbon demands

  • 90% reduction in waste biomass
  • Reduction in CO2 emissions

Reduction in N2O emissions

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The Anammox Process

Strengths Weaknesses

Decreased aeration demands

  • 60% reduction in energy consumption

Decreased organic carbon demands

  • 90% reduction in waste biomass
  • Reduction in CO2 emissions

Slow growth rate

  • Long start-up periods

Sensitivity to reactor conditions

  • Instability
  • Periodic Failures

Reduction in N2O emissions Bacteria not yet isolated

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The Anammox Process

Strengths Weaknesses

Decreased aeration demands

  • 60% reduction in energy consumption

Decreased organic carbon demands

  • 90% reduction in waste biomass
  • Reduction in CO2 emissions

Slow growth rate

  • Long start-up periods

Sensitivity to reactor conditions

  • Instability
  • Periodic Failures

Research Goal: Utilize insights from microbiology to understand and improve the functionality of the anammox process

Reduction in N2O emissions Bacteria not yet isolated

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Laboratory-Scale Anammox Bioreactor

Operating Conditions

  • Influent:
  • Synthetic wastewater
  • ArCO2
  • Reactor:
  • Volume: 1L
  • Temperature: 37°C
  • HRT: 12-48 hours
  • SRT: 50 days

1L Membrane Bioreactor

NH4

+

NO2

  • HCO3
  • N2

NO3

  • biomass

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Operating Conditions

  • Influent:
  • Synthetic wastewater
  • ArCO2
  • Reactor:
  • Volume: 1L
  • Temperature: 37°C
  • HRT: 12-48 hours
  • SRT: 50 days

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Laboratory-Scale Anammox Bioreactor

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Time (days) Nitrogen Removal Rate (NRR) (g N/L·d)

0.0 0.5 1.0 1.5 2.0 2.5 50 100 150 200 250 300 350 400 450 500

NRR

Bioreactor Performance

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Time (days) Nitrogen Removal Rate (NRR) (g N/L·d)

0.0 0.5 1.0 1.5 2.0 2.5 50 100 150 200 250 300 350 400 450 500

NRR

Bioreactor Performance

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Time (days) Nitrogen Removal Rate (NRR) (g N/L·d) 16S Sample Metagenome Sample NRR

Bioreactor Performance

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0.0 0.5 1.0 1.5 2.0 2.5 50 100 150 200 250 300 350 400 450 500

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Next Steps

  • Verify hypotheses with batch experiments.
  • Identify strategies to deal with carbon fluctuations at the

wastewater treatment plant.

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Questions?