In-Situ Groundwater Nitrification and De-Nitrification ...?In-Situ Groundwater Nitrification and De-Nitrification Remediation Processes. Presented by Steve Mailath, EBA Engineering

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  • In-Situ Groundwater Nitrification and De-Nitrification Remediation Processes

    Presented by Steve Mailath, EBA Engineering Consultants

    Ltd.Phone: 403.723.6898

  • Problems with Ammonia and Nitrate

    Over fertilization (eutrophication) of surface waters with N

    Ammonia toxic to animal species fish and invertebrates

    Nitrate contamination of drinking water blue baby syndrome methemoglobinemia

    Discounted value of brown-field development

  • Environmental and Regulatory Issues

    Environmental regulations are becoming more stringent with time Environmental enforcement orders

    Growing public concern of environmental management

    Restricted land use

  • Where is the Problem Who is responsible

    Fertilizer manufacturing and storage facilities Brown-field developer

    Sewage treatment facilities City of Calgary

    Agricultural areas Farmers

    Airports Calgary airport authority

  • Problems with Existing Solutions

    Expense Treatment facilities Piping Operating

    Large footprint, need to close site

  • In-Situ Groundwater Nitrification andDe-Nitrification Remediation Processes

    In-situ nitrification: Extracting groundwater Adding oxygen and nutrients Injection of amended groundwater

    In-situ de-nitrification Extracting groundwater Adding carbon and nutrients Injection of amended groundwater

    By: Steve Mailath, EBA Engineering Consultants Ltd.Patent Pending: David Reese, University Technologies International, Phone: 270.2434

    Dr. Angus Chu, U of C, Phone: 220.8987Steve Mailath, EBA, Phone: 723.6898

  • Advantages

    Performs as well as best in class solutions at less than half the cost

    Full mass removal - nitrates reduced to N gas Small footprint and less intrusive than most

    solutions Requires fewer wells and piping Year round treatment Free bio-reactor (in situ)

  • Options

    Options Main Limitations Capital($ Million)

    Operating

    ($/year)

    Present Value Cost1($ million)

    1. Groundwater Extraction and Irrigation Summer treatment

    $0.85 $57,000 $1.4

    2. Groundwater Extraction and Discharge to City Sanitary Sewer

    Removal of ammonia only

    $0.69 $50,000 $1.2

    3. Groundwater Extraction and Electrochemical Treatment

    High cost $3.1 $155,000 $4.7

    4. Groundwater Extraction and Biological Treatment (Nitrification)

    High cost $1.6 $100,000 $2.6

    5. Groundwater Extraction and Wetlands Disposal

    Summer treatment, low N

    $0.64 $51,000 $1.2

    6. In-Situ Electrochemical Treatment Low perm soils $2.8 >$35,000 >$3.0

    7. On-Site Ex-Situ Biological Treatment High cost $5.0 to $7.0

    >$35,000 >$5.0

    8. In-Situ Nitrification and High perm soils $0.2 $30,000 $0.5

    De-Nitrification $0.1 $25,600 $0.41 Present value based upon 15 year life and 5% rate of return.

  • Nitrate Plume

  • Ammonia Plume

  • Site Plot Plan

  • Cross-Section A-A

  • Cross-Section D-D

  • Typical Gravel

  • Hydraulic Parameters

    Section length 425 m (perpendicular to flow Section thickness 3.0 m Hydraulic conductivity 49 m/day Hydraulic gradient 0.0023 Groundwater velocity 0.3 0.5 m/day Groundwater flux 144 m3/day (22 igpm) Ammonia concentration 63.2 mg-N/L Nitrate concentration 94 mg-N/L (i.e., 31 mg-N/L

    in-situ plus 63 mg-N/L generatedby nitrification)

  • In-Situ Nitrification

  • Pilot Test Site

  • Test Site

    GROUNDWATER FLOW

  • Test Site

    INJECTIONWELL

    EXTRACTION WELL

  • Installing Monitoring Wells

  • Test Site

    TREATMENT SHED

  • Nitrification

    TREATMENT SHED

  • Oxygen Addition

    OXYGEN SOURCE

  • Amendment Addition

    GAS LIQUID REACTOR

    NUTRIENT DELIVERY

    OXYGEN DELIVERY

  • Amendment Addition

    VENTURI

  • Nitrification Results

    0.00

    20.00

    40.00

    60.00

    80.00

    100.00

    120.00

    1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77 81 85 89 93 97 101

    105

    109

    113

    117

    121

    125

    129

    133

    137

    141

    145

    149

    Days

    DO

    , Am

    mon

    ia,

    Nitr

    ate

    - N C

    once

    ntra

    tion

    (mg/

    L)

    0.00

    0.20

    0.40

    0.60

    0.80

    1.00

    1.20

    Phos

    phat

    e - P

    Con

    cent

    ratio

    n (m

    g/L)

    TH13 NH4TH13 NO3TH13 DOTH13 PO44 per. Mov. Avg. (TH13 NH4)4 per. Mov. Avg. (TH13 NO3)4 per. Mov. Avg. (TH13 DO)

    66 89 % AMMONIA REDUCTION

  • In-Situ De-Nitrification

  • Pilot Test Site

  • Amendment Addition

    NUTRIENT DELIVERY

    NO OXYGEN DELIVERY

  • De-Nitrification

    NUTRIENT DELIVERY CARBON

    DELIVERY

  • Field Lab

  • De-Nitrification Results

    0.00

    10.00

    20.00

    30.00

    40.00

    50.00

    60.00

    70.00

    3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

    Days

    DO

    , A

    mm

    onia

    , Nitr

    ate

    - N C

    once

    ntra

    tion

    (mg/

    L)

    4 per. Mov. Avg. (TH1 DO)4 per. Mov. Avg. (TH1 NH4)4 per. Mov. Avg. (TH1 NO3)

    Nitrate

    Ammonia

    Dissolved oxygen

    78 99 % NITRATE REDUCTION

  • Options

    Options Main Limitations Capital($ Million)

    Operating($/year)

    Present Value Cost1($ million)

    1. Groundwater Extraction and Irrigation Summer treatment $0.85 $57,000 $1.4

    2. Groundwater Extraction and Discharge to City Sanitary Sewer

    Removal of ammonia only

    $0.69 $50,000 $1.2

    3. Groundwater Extraction and Electrochemical Treatment

    High cost $3.1 $155,000 $4.7

    4. Groundwater Extraction and Biological Treatment (Nitrification)

    High cost $1.6 $100,000 $2.6

    5. Groundwater Extraction and Wetlands Disposal

    Summer treatment, low N

    $0.64 $51,000 $1.2

    6. In-Situ Electrochemical Treatment Low perm soils $2.8 >$35,000 >$3.0

    7. On-Site Ex-Situ Biological Treatment High cost $5.0 to $7.0 >$35,000 >$5.0

    8. In-Situ Nitrification and High perm soils $0.2 $30,000 $0.5

    De-Nitrification $0.1 $25,600 $0.41 Present value based upon 15 year life and 5% rate of return.

  • Questions

    In-Situ Groundwater Nitrification andDe-Nitrification Remediation Processes

    By: Steve Mailath, EBA Engineering Consultants Ltd.Patent Pending: David Reese, University Technologies International,

    Phone: 270.2434Dr. Angus Chu, U of C, Phone: 220.8987Steve Mailath, EBA, Phone: 723.6898

    QUESTIONS

  • Problems with Ammonia and NitrateEnvironmental and Regulatory IssuesWhere is the Problem Who is responsibleProblems with Existing SolutionsIn-Situ Groundwater Nitrification andDe-Nitrification Remediation ProcessesAdvantagesOptionsNitrate PlumeAmmonia PlumeSite Plot PlanCross-Section A-ACross-Section D-DTypical GravelHydraulic ParametersIn-Situ NitrificationPilot Test SiteTest SiteTest SiteInstalling Monitoring WellsTest SiteNitrificationOxygen AdditionAmendment AdditionAmendment AdditionNitrification ResultsIn-Situ De-NitrificationPilot Test SiteAmendment AdditionDe-NitrificationField LabDe-Nitrification ResultsOptionsQuestions

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