achieve nitrification and ultra-low phosphorus using ... phosphorus using tertiary membrane...

Achieve Nitrification and Ultra-Low Phosphorus using Tertiary Membrane Filtration

Karen Bill HDR Engineering

Portland, OR

Outline •  Background

•  Project Goals

•  Objectives

•  Tertiary Membrane Filtration (TMF)

•  Phosphorus and Ammonia Removal

City of Coeur d’Alene Advanced Wastewater Treatment Facility

•  6 MGD Trickling Filter/Solids Contact (TF/SC) –  Ammonia Control (Capacity limited to ~4.2 MGD)

–  Phosphorus Control (Alum precipitation)

City of Coeur d’Alene Advanced Wastewater Treatment Facility

•  6 MGD Trickling Filter/Solids Contact (TF/SC) –  Ammonia Control (Capacity limited to ~4.2 MGD)

–  Phosphorus Control (Alum precipitation)

•  Currently operates under an extend 2004 permit: •  Ammonia (July – Sept):

•  10 mg/L at flow < 4.2 MGD •  7.4 mg/L at flow > 4.2 MGD

•  Phosphorus (May – Oct): •  1 mg/L or 85% removal

Coeur d’Alene Process Schematic

IFAS Media

Coeur d’Alene Process Schematic

IFAS Media

•  IFAS added to fortify nitrification capacity, but need more as flows increase

Key Issues and Project Motivation •  Spokane River water quality requirements

–  Very low effluent requirements •  Assess technology limitation 0.05 mg/L •  NPDES permit negotiations (seasonal mass loading)

–  Effluent ammonia limitations •  Additional treatment capacity needed

–  No additional capacity available with effluent ammonia limits

•  Constrained treatment plant site

2006 Low Phosphorus Pilot •  4 technologies tested to achieve 0.010 mg/L TP

Zenon Ultrafiltration ZeeWeed 500

Parkson DynaSand D2

US Filter Trident HS - 1

Blue Water Technologies Dual Stage Blue Pro

Secondary Effluent

Drain

2006 Small Pilot Test

•  Encouraging results, but –  Limited duration, ~2 months

–  Operated by the manufacturers

–  Constant flow

•  Many uncertainties remained: –  Reliability and redundancy

–  Larger scale operation

–  Analytical variability

–  Full scale design criteria

–  Plant staff operation

Low Phosphorus Pilot Demonstration

3 systems tested: –  Tertiary Dual-Stage Continuous Upflow Sand Filter

–  Tertiary Membrane Filter

–  Advanced Treatment BNR MBR

Existing Secondary

TF/SC

New Advanced Treatment MBR

Primary Effluent

New Tertiary Filters

Effluent

Pilot Demonstration Objectives

•  Evaluate phosphorus removal reliability

•  Determine system design criteria for full scale

•  Operating strategy

•  Conduct stress testing events

•  Plant staff training

Tertiary Membrane Filtration

Tertiary Membrane Filtration

•  Design Criteria –  50,000 gpd max month

–  100,000 gpd peak flow

–  1,500 gal mixing tank

–  1,600 gal membrane tank

–  17 gfd design flux

–  35 gpm recirculation flow

•  Initial intent for P removal only

•  No nitrification design considerations included

TMF Process Flow Schematic

Membrane Filtration System

Al/Fe

Secondary Effluent

Mixing Tank

Permeate

WasteSludge Recirculation

M

Plant secondary effluent = TMF influent Phosphorus = 0.6 – 2.5 mg/L TP

With Instrumentation and Sampling

Membrane Filtration System

Al/Fe

S

Secondary Effluent

Mixing Tank

Permeate

Waste

PO4-‐PNH4-‐NNO3-‐NpH

Turbidity

S Composite SamplerPumpSample Line

PO4-‐P

S

Online Analyzer

Sludge Recirculation

TSSpH

BatchTank

PO4-‐PNH4-‐NNO3-‐N

M G G

G

G

G Grab Sample Port

Operations •  Controls

–  Influent diurnal pattern based on plant flow

•  Operation Modes –  Conventional filtration

–  Chemical sludge recirculation

•  Cleaning –  Maintenance and Recovery

Cleans

•  Chemical dose –  Alum addition at ~50 mg/L

Membrane Filtration

•  1 cassette with 10 modules

•  4,400 ft2 total membrane surface area

•  0.04 µm pore size

•  10 min production cycle

Startup and Optimization

•  Initial facility startup in April 2010

•  Control and mechanical related issues

•  System stable by early July 2010 –  Consistent removal below 0.036 mg/L TP

Building the Solids Inventory •  Started the end of August 2010

•  Target 3,000 mg/L TSS

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S m

g/L

TMF Mixing Tank TSS

Ini$al building started

Building the Solids Inventory •  Started the end of August 2010 beginning of Sept.

•  Target 3,000 mg/L TSS

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TMF Mixing Tank TSS

Actual building started

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4-P

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/L

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P Removal – With Solids •  Increase P removal

•  Stabilization of effluent P

P Removal – With Solids

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Dates Avg. MT TSS (mg/L TSS)

Avg. Influent TP (mg/L P)

Avg. Effluent TP (mg/L P)

Aug 1 – Aug 23, 2010 1,200 0.75 0.083 Aug 24 – Sept 9, 2010 1,300 0.66 0.032 Sept 9 – Oct 23, 2010 2,800 0.63 0.021

Nitrification- With Solids •  Quick ammonia removal as solids build

•  Membrane air scrub used for aeration

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S m

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NH

4-N

mg

/L

SE NH4-N TMF Effluent NH4-N TMF Mixing Tank TSS

Nitrification- With Solids •  Quick removal of NH4-N as solids build

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Dates Avg. MT TSS (mg/L TSS)

Avg. Inf. NH4 (mg/L N)

Avg. Eff. NH4 (mg/L N)

Aug 1 – Aug 23, 2010 1,200 8.0 4.6 Aug 24 – Sept 9, 2010 1,300 9.0 3.6 Sept 9 – Oct 23, 2010 2,800 7.4 1.7

Monthly Averages

Month Inf TP (mg/L)

Eff TP (mg/L)

TP Removed

(mg/L)

Inf NH4-N (mg/L)

Eff NH4-N (mg/L)

NH4-N Removed

(mg/L) MT TSS (mg/L)

Temp (°C)

Chemical /Dose (mg/L)

Aug 2010 0.83 0.018 0.81 8.2 4.6 3.6 1,400 22 Alum/50 Sept 2010 0.85 0.020 0.83 7.8 2.2 5.6 2,000 22 Alum/50 Oct 2010 0.82 0.022 0.80 7.8 2.7 5.1 2,600 21 Alum/50 Nov 2010 - - - - - - - - - Dec 2010 2.6 0.059 2.5 15.4 13.1 2.3 450 19 Ferric/33 Jan 2011 2.3 0.11 2.2 16.2 15.0 1.2 470 17 Ferric/28 Feb 2011 2.1 0.20 1.9 15.2 14.0 1.2 470 14 Ferric/26 March 2011 2.4 0.081 2.3 17.1 15.0 2.1 700 12 Alum/50 April 2011 2.2 0.049 2.2 17.3 14.6 2.7 2,400 13 Alum/50 May 2011 0.70 0.013 0.69 13.8 10.3 3.5 3,000 15 Alum/50 June 2011 0.77 0.040 0.73 13.2 3.3 9.7 2,100 18 Alum/50 July 2011 0.62 0.012 0.61 8.8 2.6 6.2 3,100 20 Alum/40 Aug 2011 0.83 0.024 0.81 8.4 0.72 7.7 3,900 22 Alum/40 Sept 2011 1.1 0.015 1.0 5.9 1.7 4.2 2,700 22 Alum/40 Oct 2011 0.97 0.014 0.95 8.0 1.2 6.8 3,200 20 Alum/40 Nov 2011 1.9 0.018 1.8 13.5 1.9 11.6 4,900 19 Alum/50

Monthly Averages

Month Inf TP (mg/L)

Eff TP (mg/L)

TP Removed

(mg/L)

Inf NH4-N (mg/L)

Eff NH4-N (mg/L)

NH4-N Removed


Temp (°C)


Aug 2010 0.83 0.018 0.81 8.2 4.6 3.6 1,400 22 Alum/50

Sept 2010 0.85 0.020 0.83 7.8 2.2 5.6 2,000 22 Alum/50

Oct 2010 0.82 0.022 0.80 7.8 2.7 5.1 2,600 21 Alum/50 Nov 2010 - - - - - - - - - Dec 2010 2.6 0.059 2.5 15.4 13.1 2.3 450 19 Ferric/33 Jan 2011 2.3 0.11 2.2 16.2 15.0 1.2 470 17 Ferric/28 Feb 2011 2.1 0.20 1.9 15.2 14.0 1.2 470 14 Ferric/26 March 2011 2.4 0.081 2.3 17.1 15.0 2.1 700 12 Alum/50 April 2011 2.2 0.049 2.2 17.3 14.6 2.7 2,400 13 Alum/50 May 2011 0.70 0.013 0.69 13.8 10.3 3.5 3,000 15 Alum/50 June 2011 0.77 0.040 0.73 13.2 3.3 9.7 2,100 18 Alum/50 July 2011 0.62 0.012 0.61 8.8 2.6 6.2 3,100 20 Alum/40 Aug 2011 0.83 0.024 0.81 8.4 0.72 7.7 3,900 22 Alum/40 Sept 2011 1.1 0.015 1.0 5.9 1.7 4.2 2,700 22 Alum/40 Oct 2011 0.97 0.014 0.95 8.0 1.2 6.8 3,200 20 Alum/40 Nov 2011 1.9 0.018 1.8 13.5 1.9 11.6 4,900 19 Alum/50

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TS

S m

g/L

NH

4-N

mg

/L


Ammonia Removal

Month Inf NH4-N

(mg/L) Eff NH4-N

(mg/L)

NH4-N Removed


Aug 10 8.2 4.6 3.6 1,400

Sept 10 7.8 2.2 5.6 2,000 Oct 10 7.8 2.7 5.1 2,600

Phosphorus Removal

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0.5

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2.5

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3.5

Jul-10 Sep-10 Nov-10 Jan-11 Mar-11 May-11 Jul-11 Sep-11

TP

(m

g/L

P)

Influent TP Effluent TP

Month Inf TP (mg/L)

Eff TP (mg/L)

TP Removed

(mg/L) Aug 10 0.83 0.018 0.81

Sept 10 0.85 0.020 0.83

Oct 10 0.82 0.022 0.80

Monthly Averages

Month Inf TP (mg/L)

Eff TP (mg/L)

TP Removed

(mg/L)

Inf NH4-N (mg/L)

Eff NH4-N (mg/L)

NH4-N Removed

(mg/L)

MT TSS

(mg/L) Temp (°C)


Aug 2010 0.83 0.018 0.81 8.2 4.6 3.6 1,400 22 Alum/50 Sept 2010 0.85 0.020 0.83 7.8 2.2 5.6 2,000 22 Alum/50 Oct 2010 0.82 0.022 0.80 7.8 2.7 5.1 2,600 21 Alum/50 Nov 2010 - - - - - - - - -

Dec 2010 2.6 0.059 2.5 15.4 13.1 2.3 450 19 Ferric/33

Jan 2011 2.3 0.11 2.2 16.2 15.0 1.2 470 17 Ferric/28

Feb 2011 2.1 0.20 1.9 15.2 14.0 1.2 470 14 Ferric/26

March 2011 2.4 0.081 2.3 17.1 15.0 2.1 700 12 Alum/50 April 2011 2.2 0.049 2.2 17.3 14.6 2.7 2,400 13 Alum/50 May 2011 0.70 0.013 0.69 13.8 10.3 3.5 3,000 15 Alum/50 June 2011 0.77 0.040 0.73 13.2 3.3 9.7 2,100 18 Alum/50 July 2011 0.62 0.012 0.61 8.8 2.6 6.2 3,100 20 Alum/40 Aug 2011 0.83 0.024 0.81 8.4 0.72 7.7 3,900 22 Alum/40 Sept 2011 1.1 0.015 1.0 5.9 1.7 4.2 2,700 22 Alum/40 Oct 2011 0.97 0.014 0.95 8.0 1.2 6.8 3,200 20 Alum/40 Nov 2011 1.9 0.018 1.8 13.5 1.9 11.6 4,900 19 Alum/50

Monthly Averages

Month Inf TP (mg/L)

Eff TP (mg/L)

TP Removed

(mg/L)

Inf NH4-N (mg/L)

Eff NH4-N (mg/L)

NH4-N Removed

(mg/L)

MT TSS

(mg/L) Temp (°C)


Aug 2010 0.83 0.018 0.81 8.2 4.6 3.6 1,400 22 Alum/50 Sept 2010 0.85 0.020 0.83 7.8 2.2 5.6 2,000 22 Alum/50 Oct 2010 0.82 0.022 0.80 7.8 2.7 5.1 2,600 21 Alum/50 Nov 2010 - - - - - - - - -

Dec 2010 2.6 0.059 2.5 15.4 13.1 2.3 450 19 Ferric/33

Jan 2011 2.3 0.11 2.2 16.2 15.0 1.2 470 17 Ferric/28

Feb 2011 2.1 0.20 1.9 15.2 14.0 1.2 470 14 Ferric/26

March 2011 2.4 0.081 2.3 17.1 15.0 2.1 700 12 Alum/50 April 2011 2.2 0.049 2.2 17.3 14.6 2.7 2,400 13 Alum/50 May 2011 0.70 0.013 0.69 13.8 10.3 3.5 3,000 15 Alum/50 June 2011 0.77 0.040 0.73 13.2 3.3 9.7 2,100 18 Alum/50 July 2011 0.62 0.012 0.61 8.8 2.6 6.2 3,100 20 Alum/40 Aug 2011 0.83 0.024 0.81 8.4 0.72 7.7 3,900 22 Alum/40 Sept 2011 1.1 0.015 1.0 5.9 1.7 4.2 2,700 22 Alum/40 Oct 2011 0.97 0.014 0.95 8.0 1.2 6.8 3,200 20 Alum/40 Nov 2011 1.9 0.018 1.8 13.5 1.9 11.6 4,900 19 Alum/50

•  No chemical sludge inventory •  Outside of main plant permit season – TMF influent

loads increased •  Shutdowns due to mechanical issues

Phosphorus Removal

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0.5

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1.5

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2.5

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3.5

Jul-10 Sep-10 Nov-10 Jan-11 Mar-11 May-11 Jul-11 Sep-11

TP

(m

g/L

P)

Influent TP Effluent TP

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S m

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NH

4-N

mg

/L


Ammonia Removal

Monthly Averages

Month Inf TP (mg/L)

Eff TP (mg/L)

TP Removed

(mg/L)

Inf NH4-N (mg/L)

Eff NH4-N (mg/L)

NH4-N Removed


Temp (°C)


Aug 2010 0.83 0.018 0.81 8.2 4.6 3.6 1,400 22 Alum/50 Sept 2010 0.85 0.020 0.83 7.8 2.2 5.6 2,000 22 Alum/50 Oct 2010 0.82 0.022 0.80 7.8 2.7 5.1 2,600 21 Alum/50 Nov 2010 - - - - - - - - - Dec 2010 2.6 0.059 2.5 15.4 13.1 2.3 450 19 Ferric/33 Jan 2011 2.3 0.11 2.2 16.2 15.0 1.2 470 17 Ferric/28 Feb 2011 2.1 0.20 1.9 15.2 14.0 1.2 470 14 Ferric/26 March 2011 2.4 0.081 2.3 17.1 15.0 2.1 700 12 Alum/50

April 2011 2.2 0.049 2.2 17.3 14.6 2.7 2,400 13 Alum/50

May 2011 0.70 0.013 0.69 13.8 10.3 3.5 3,000 15 Alum/50

June 2011 0.77 0.040 0.73 13.2 3.3 9.7 2,100 18 Alum/50

July 2011 0.62 0.012 0.61 8.8 2.6 6.2 3,100 20 Alum/40

Aug 2011 0.83 0.024 0.81 8.4 0.72 7.7 3,900 22 Alum/40

Sept 2011 1.1 0.015 1.0 5.9 1.7 4.2 2,700 22 Alum/40

Oct 2011 0.97 0.014 0.95 8.0 1.2 6.8 3,200 20 Alum/40

Nov 2011 1.9 0.018 1.8 13.5 1.9 11.6 4,900 19 Alum/50

Monthly Averages

Month Inf TP (mg/L)

Eff TP (mg/L)

TP Removed

(mg/L)

Inf NH4-N (mg/L)

Eff NH4-N (mg/L)

NH4-N Removed


Temp (°C)



April 2011 2.2 0.049 2.2 17.3 14.6 2.7 2,400 13 Alum/50

May 2011 0.70 0.013 0.69 13.8 10.3 3.5 3,000 15 Alum/50

June 2011 0.77 0.040 0.73 13.2 3.3 9.7 2,100 18 Alum/50

July 2011 0.62 0.012 0.61 8.8 2.6 6.2 3,100 20 Alum/40

Aug 2011 0.83 0.024 0.81 8.4 0.72 7.7 3,900 22 Alum/40

Sept 2011 1.1 0.015 1.0 5.9 1.7 4.2 2,700 22 Alum/40

Oct 2011 0.97 0.014 0.95 8.0 1.2 6.8 3,200 20 Alum/40

Nov 2011 1.9 0.018 1.8 13.5 1.9 11.6 4,900 19 Alum/50

Avg = 0.023 mg/L TP Avg = 3,200 mg/L TSS

Monthly Averages

Month Inf TP (mg/L)

Eff TP (mg/L)

TP Removed

(mg/L)

Inf NH4-N (mg/L)

Eff NH4-N (mg/L)

NH4-N Removed


Temp (°C)



April 2011 2.2 0.049 2.2 17.3 14.6 2.7 2,400 13 Alum/50

May 2011 0.70 0.013 0.69 13.8 10.3 3.5 3,000 15 Alum/50

June 2011 0.77 0.040 0.73 13.2 3.3 9.7 2,100 18 Alum/50

July 2011 0.62 0.012 0.61 8.8 2.6 6.2 3,100 20 Alum/40

Aug 2011 0.83 0.024 0.81 8.4 0.72 7.7 3,900 22 Alum/40

Sept 2011 1.1 0.015 1.0 5.9 1.7 4.2 2,700 22 Alum/40

Oct 2011 0.97 0.014 0.95 8.0 1.2 6.8 3,200 20 Alum/40

Nov 2011 1.9 0.018 1.8 13.5 1.9 11.6 4,900 19 Alum/50

Avg = 4.5 mg/L NH4-N Avg = 3,200 mg/L TSS

Monthly Averages

Month Inf TP (mg/L)

Eff TP (mg/L)

TP Removed

(mg/L)

Inf NH4-N (mg/L)

Eff NH4-N (mg/L)

NH4-N Removed


Temp (°C)


Aug 2010 0.83 0.018 0.81 8.2 4.6 3.6 1,400 22 Alum/50 Sept 2010 0.85 0.020 0.83 7.8 2.2 5.6 2,000 22 Alum/50 Oct 2010 0.82 0.022 0.80 7.8 2.7 5.1 2,600 21 Alum/50 Nov 2010 - - - - - - - - - Dec 2010 2.6 0.059 2.5 15.4 13.1 2.3 450 19 Ferric/33

Jan 2011 2.3 0.11 2.2 16.2 15.0 1.2 470 17 Ferric/28 Feb 2011 2.1 0.20 1.9 15.2 14.0 1.2 470 14 Ferric/26 March 2011 2.4 0.081 2.3 17.1 15.0 2.1 700 12 Alum/50

April 2011 2.2 0.049 2.2 17.3 14.6 2.7 2,400 13 Alum/50

May 2011 0.70 0.013 0.69 13.8 10.3 3.5 3,000 15 Alum/50

June 2011 0.77 0.040 0.73 13.2 3.3 9.7 2,100 18 Alum/50

July 2011 0.62 0.012 0.61 8.8 2.6 6.2 3,100 20 Alum/40

Aug 2011 0.83 0.024 0.81 8.4 0.72 7.7 3,900 22 Alum/40

Sept 2011 1.1 0.015 1.0 5.9 1.7 4.2 2,700 22 Alum/40

Oct 2011 0.97 0.014 0.95 8.0 1.2 6.8 3,200 20 Alum/40

Nov 2011 1.9 0.018 1.8 13.5 1.9 11.6 4,900 19 Alum/50

Avg = 1.9 mg/L NH4-N Avg = 3,300 mg/L TSS

April to November 2011 – Nitrification

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S m

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NH

4-N

mg

/L


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PO

4-P

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g/L

)

TMF Effluent PO4-P Secondary Effluent PO4-P

Loss of Chemical Feed - With Solids •  Solids concentration = 3,000 mg/L •  No immediate loss of P removal •  Effluent peaked at 0.12 mg/L after 2.5 days of no alum addition

Alum Off

Alum On

No Alum

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PO

4-P

(m

g/L

)

TMF Effluent PO4-P Secondary Effluent PO4-P

Loss of Chemical Feed - No Solids •  No chemical sludge inventory

–  Instant increase in effluent P –  Effluent spike to ~0.5 mg/L PO4-P –  Quick return of P removal once alum feed resumed

Alum Off

Alum On No Alum

Summary •  Conventional Filtration Mode with alum provided:

–  Low effluent P removal

–  No nitrification

•  Solids Recirculation Mode with alum provided: –  Consistent removal below 0.05 mg/L TP

–  Ammonia removal below 3.0 mg/L NH4-N

–  Potential protection against:

•  Loss of chemical feed

•  Increased influent phosphorus events

–  Slight increase of operating TMP

Acknowledgements

Questions?

Karen Bill HDR

Portland, Oregon

[email protected]

503-432-3820

Reuse Water Tank

Mixing Tank

CUMF 1

CUMF 2

AER Tank

ANX TankANR Tank

DN Tank

DeOxTank

Micro Screen

Membrane Tank

BlowerFridge

Fridge

Membrane Tank 2

CUMF Feed Pumps

DN PumpDeOxPump

Blower 1

Blower 2

Membrane Tank 1

Color Palette

achieve nitrification and ultra-low phosphorus using ... phosphorus using tertiary membrane...

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