Upgrading Lagoons to Remove: Ammonia Nitrification Lagoons to Remove Ammonia...Cold climate nitrification facts Full Stops at temperatures below 4C in conventional treatment nitrification

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  • Upgrading Lagoons to Remove:

    Ammonia Nitrification &

    Phosphorus

    MWEA Specialty Conference January 23, 2015 Friday - 11:00 to 11:30am

    Todd Latchaw

    Nelson Environmental Inc.

    www.nelsonenvironmental.com

    http://www.nelsonenvironmental.com/

  • Choosing an appropriate WWTF

    SIMPLE

    COMPLEX

    Facultative lagoon

    Aerated Lagoon

    Aerated Lagoon with TAN/TP Removal

    Mechanical Plant

    Membranes (MBR)

    Meets all anticipated effluent requirements (TAN, BOD, TSS, TP, TN)

    You do not have to go high-tech to meet stringent

    effluent requirements

  • Cold climate nitrification facts

    Stops at temperatures below 4C in conventional

    treatment

    Full nitrification

    requires temperatures

    at 8-10 C

    Nitrification precedes Total

    Nitrogen removal

    Lagoon effluent in

    Northern USA & Canada is

    typically < 1oC for 3 to 5 months

    Nitrification occurs once cBOD levels

    are low

    (Back end of a lagoon system)

  • Nutrient Removal

    Phosphorus Total Nitrogen

    Ammonia

    BOD TSS

  • Aerated or Facultative

    Lagoons

    (BOD & TSS Removal)

    SAGR

    (Nitrification)

    AN-SAGR /

    Effluent

    Recycle

    (Denitrification)

    Coagulation/

    Filtration

    (TP Removal)

    Treatment Process

  • Terminology

    NH3 NH4+ TAN

    (Total Ammonia)

    Ammonia NH3?

    Ammonium NH4+?

    Ratio determined By pH and

    Temperature

    NH4+

    NH3

    Ammonium

    Un-ionized Ammonia Toxic

    Why is removing ammonia important?

  • Ammonia toxicity relation to temperature & pH

    Total (NH3 + NH4+)

    10 mg/L

    10 mg/L

    10 mg/L

    pH 7.8 7.8 8.8

    Temperature 5C 20C 20C

    Un-ionized Ammonia

    0.078 mg/L

    0.22 mg/L

    2.00 mg/L

    Example Lagoon System that reduce TAN down to 10 mg/L

    To return to a level of NH3 0.078 mg/L Requires an effluent TAN level of 0.4 mg/L

    2.9 times more toxic

    25.6 times more toxic

  • Influent Aerated or Facultative Ponds

    CBOD/TSS removal

    Effluent

    Continuous discharge lagoons with TAN & TP Removal

    SAGR

    Nitrification/BOD & TSS Polishing & Disinfection

    Tertiary Filtration

    TP removal

  • POST LAGOON NITRIFICATION AND EFFLUENT POLISHING

  • What is a SAGR?

    Fully aerated coarse gravel bed reactor.

    Stable dense rock media which is not susceptible to temperature shock

    Designed for cold water treatment (0.5C)

    The SAGR removes ammonia through nitrification and provides BOD/TSS polishing & disinfection

  • Submerged Attached Growth Reactor Primary

    Feed Secondary Feed

    Zone 1

    Zone 2

    Collection Chamber

  • SAGR Aerated Lagoon

    Retention Time 25 days

    SAGR Demonstration Site Steinbach, MB

    Lagoon Influent BOD: 150 to 180 mg/L

    Demo Site: Avg. Flow Rate: 10,500 13,200 GPD (municipal)

  • Steinbach, MB Data

    0.0

    10.0

    20.0

    30.0

    40.0

    50.0

    60.0

    70.0 1

    9-J

    ul-

    08

    2-A

    ug-

    08

    16

    -Au

    g-0

    8

    30

    -Au

    g-0

    8

    13

    -Se

    p-0

    8

    27

    -Se

    p-0

    8

    11

    -Oct

    -08

    25

    -Oct

    -08

    8-N

    ov-

    08

    22

    -No

    v-0

    8

    6-D

    ec-

    08

    20

    -De

    c-0

    8

    3-J

    an-0

    9

    17

    -Jan

    -09

    31

    -Jan

    -09

    14

    -Fe

    b-0

    9

    28

    -Fe

    b-0

    9

    14

    -Mar

    -09

    28

    -Mar

    -09

    11

    -Ap

    r-0

    9

    25

    -Ap

    r-0

    9

    9-M

    ay-0

    9

    23

    -May

    -09

    6-J

    un

    -09

    20

    -Ju

    n-0

    9

    4-J

    ul-

    09

    18

    -Ju

    l-0

    9

    1-A

    ug-

    09

    15

    -Au

    g-0

    9

    29

    -Au

    g-0

    9

    mg/L (C)

    SAGR Following Aerated Lagoon Treatment Cycle

    SAGR Influent TAN SAGR Effluent TAN SAGR Influent cBOD5

    SAGR Effluent cBOD5 Water Temperature

  • SAGR Performance Data

    Parameters SAGR Influent Averages

    (mg/L)

    SAGR Effluent Averages

    (mg/L)

    Removal

    cBOD 47 2.1 95.5%

    TSS 30 1.3 95.7%

    TAN 24.9 0.12 99.5%

    TKN 32.5 1.8 94.5%

    FC (cfu /100 ml) 253000 13.5 99.99%

    Average water temperature (C)

    0.3 1.0

    University of Manitoba Third Party Winter Operation Verification Data

    (JANUARY 13 APRIL 21, 2010)

  • Typical SAGR Applications Post Lagoon Nitrification Post Lagoon BOD/TSS

    Airport De-icing Fluid Treatment Decentralized Treatment

  • Project Examples

  • SAGR projects

    Steinbach (Demo), MB 0.010 MGD

    Lloydminster (Demo), SK 0.017 MGD

    Perth (Demo), ON 0.053 MGD

    Blumenort (Demo), MB 0.016 MGD

    Doaktown, NB 0.169 MGD

    Dawson Creek, BC 1.058 MGD

    Mentone, IN 0.120 MGD

    Glencoe, ON 0.456 MGD

    Long Plain FN, MB 0.264 MGD

    Sylvan Lake, SD 0.045 MGD

    Walker, IA 0.222 MGD

    Lamar, MO 0.770 MGD

    Shellbrook, SK 0.217 MGD

    Balcarres, SK 0.085 MGD

    Misipiwistik FN, MB 0.115 MGD

    Greenbryre, SK 0.091 MGD

    Kennard, IN 0.100 MGD

    Guthrie School, ON 0.003 MGD

    Kingsley, IA 0.300 MGD

    Sundridge, ON 0.315 MGD

    New London, IA 0.885 MGD

    Colesburg, IA 0.241 MGD

    Hull, IA 0.700 MGD

    Buffalo, NY Airport* 1.216 MGD

    Edmonton, AB Airport* 0.159 MGD

    LI MacArthur Airport, NY* 0.144 MGD

    Grand Rapids, MI Airport* 1.000 MGD

    Completed Municipal SAGR Projects

    Currently Under Construction

    * Airport Glycol De-icing Treatment

    Berne, IN 1.920 MGD

    Completed Airport SAGR Projects

  • Mentone, Indiana

    Facultative lagoon

    Facultative lagoon

    SAGR Beds for nitrification

    Influent

  • 0

    20

    40

    60

    80

    100

    120

    TAN

    (mg/

    L)

    (Total Ammonia)

    WWTP Influent TAN SAGR Influent TAN SAGR Effluent TAN Limit

    NPDES Permit Requirements: - cBOD5 = 25 mg/L - TSS = 70 mg/L -TAN = 9.6/10.4 mg/L (summer/winter) Design flow = 0.12 MGD (454 m3/day)

    Mentone, Indiana Data

  • Mentone, Indiana

    0

    10

    20

    30

    40

    50

    60

    70

    80

    14-Aug-13 3-Oct-13 22-Nov-13 11-Jan-14 2-Mar-14 21-Apr-14 10-Jun-14 30-Jul-14 18-Sep-14 7-Nov-14 27-Dec-14

    TAN

    (m

    g/L)

    Mentone SAGR: Influent & Effluent TAN

    WWTP Influent TAN SAGR Effluent TAN

  • Disk filter with alum addition for TP removal

    SAGR for nitrification

    Two (2) cell controlled discharge lagoon converted into a three (3) cell continuous discharge aerated

    lagoon

    Glencoe, Ontario

  • SAGR

    Influent

    Effluent

    discharge

    Alum

    addition

    Glencoe, Ontario

    Disc Filter

    Aerated

    Lagoon

  • Glencoe, Ontario

    0

    2.5

    5

    7.5

    10

    12.5

    15

    17.5

    20

    22.5

    25

    27.5

    30

    TAN

    (m

    g/L)

    & W

    ate

    r Te

    mp

    (C

    )

    SAGR: Influent & Effluent TAN (2013-2014)

    Influent SAGR TAN Effluent SAGR TAN Water Temperature

    Permit Requirements: -TAN = 3 mg/L Design flow = 0.46 MGD

  • Glencoe, Ontario

    0.00

    0.50

    1.00

    1.50

    2.00

    2.50

    3.00

    TAN

    (m

    g/L)

    Glencoe WWTP - Influent and Effluent TAN

    4 Sample Moving Avg

    Permit Requirements: - cBOD5 = 13.7 mg/L - TSS = 13.7 mg/L -TAN = 3 mg/L Design flow = 0.46 MGD (1746 m3/day)

    Annual Step Feed

  • Lamar, MO (upgraded facility)

    Single cell facultative lagoon

    Two (2) SAGR beds for nitrification

    Influent

  • Lamar, MO

    0

    0.5

    1

    1.5

    2

    2.5

    3

    TAN

    (m

    g/L)

    Lamar SAGR: Effluent TAN

    Effluent TAN Missouri Proposed Limits

    Lamar Effluent Requirements: - BOD = 10 mg/L -TSS = 10 mg/L - TAN = 1/7 mg/L (summer/winter)

  • 0

    5

    10

    15

    20

    25

    30

    TAN

    (m

    g/L)

    Lamar SAGR: Influent and Effluent TAN

    Effluent TAN Water Temperature (C)

    Effluent Requirements: - TAN = 1.3/2.8 mg/L (summer/winter)

    Design Flow 2910 m3/Day (0.770 MGD)

    Lamar, MO Data

  • 0

    0.5

    1

    1.5

    2

    2.5

    3

    3.5

    4

    4.5

    5

    TAN

    mg/

    L

    Lamar, MO: SAGR Effluent TAN

    Effluent SAGR TAN New Missouri DNR TAN Limits

    Lamar, Missouri

    Design Flow 2910 m3/Day (0.770 MGD)

  • Kennard, Indiana

    Cell # 1 Partial Mix

    Cell #2 Partial Mix

    Cell #3 Partial Mix &

    settling

    Influent

    Two (2) SAGR beds for nitrification

  • Kennard, Indiana

    0

    5

    10

    15

    20

    25

    30

    35

    40

    45

    50

    TAN

    mg/

    L