Nitrex

Passive Nitrogen Removal Systems
Achieving Total Nitrogen 3 mg/l
TM

Workshop on Nitrogen Removing Wastewater
Syst...
Nitrex TM


Passive Lower Cost Alternative



Achieving TN < 5 mg/l, averaging
TN 3 mg/l



Can Produce TN < 2 mg/l &< ...
Typical Residential Process Train

3

3
Malibu, CA Plaza Wastewater Process Flow
Has Achieved TN < 2 mg/l for 3+ years
Produces Effluent Compliant with CA Title 2...
5

5
LaPine OR US EPA Study Results

6

6
Suffolk County Alternative Wastewater Technologies
NitrexTM Testing by SCDHS

Nitrex

No.
1
2
3
4
5

TM

EFFLUENT TN (mg/l...
Cluster / Neighborhood
Wastewater Systems

8

8
Residential & Light Commercial Nitrex™
Wastewater System – Mashpee, MA
Effluent Total Nitrogen 3 +/- mg/l
Quarterly Operat...
10

10
Residential Development Producing Water with Total
Nitrogen 2.2 mg/l


Eastham, MA


10,000 gpd design flow

Septic Tank...
Malibu Creek Plaza, Malibu, CA

Malibu Creek
Plaza

12

12
Malibu Village Plaza
Wastewater System Configuration

Biofilters

Nitrex T M Tanks
1 st Stage
Recirculation
Tank

13

2 nd...
Malibu Village Plaza Performance
Achieves Unlimited Reuse Standards
Total Nitrogen (mg/l)
Annual Geo
mean
4.90
1.72
1.90
2...
Bogue Sound Elementary School &
Croatan High School Newport, NC
Influent Quality:
TN

70 - 149 mg/l
104 mg/l average

Aver...
Individual Onsite
Wastewater Systems

16

16
2 Family Residential Nitrex™Wastewater System


Harvard, MA


660 gpd
Septic Tank

Drip Irrigation

BioFilter

17

Nitre...
Residential Retrofit Installations – Maryland
Producing TN 1.7 mg/l

BioFilter
Septic
tank
NitrexTM Filter

18

18
Nitrex™ Costs
•Total

System costs for residential applications:
New/Complete System
Retrofit

•Large

$28,000 - $35,000
$...
Groundwater Treatment Options









20

Immediate Water Quality Benefit
Addressing legacy issue of historical N
di...
NitrexTM PRB for Groundwater
Treatment

Cross Section. NitrexTM PRB
21
Waquoit Bay PRB

22

22
November 2005, ~ 3.5 months after installation
Groundwater Nitrate Removal in Waquoit Bay PRB
NO3 (? M)
-

Grade

Relative...
NITRATE AT WAQUOIT BAY DATA COLLECTED BY
WOODS
HOLE MARINE BIOLOGICAL LAB (MBL)

Groundwater Flow

24

24
Questions / Discussion
Pio Lombardo, P.E.

25

25
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Nitrex(TM) Passive Nitrogen Removal Systems

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A presentation about Nitrex(TM) Passive Nitrogen Removal Systems. Presented by Pio Lombardo with Lombardo Associates Inc. during a Buzzards Bay Coalition 2014 Decision Makers mini-workshop on nitrogen-reducing septic systems. Learn more at www.savebuzzardsbay.org/DecisionMakers

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Nitrex(TM) Passive Nitrogen Removal Systems

  1. 1. Nitrex Passive Nitrogen Removal Systems Achieving Total Nitrogen 3 mg/l TM Workshop on Nitrogen Removing Wastewater Systems Buzzards Bay Coalition Buzzards Bay Center, 114 Front Street New Bedford, MA Pio Lombardo, P.E. Lombardo Associates, Inc. Newton, MA 02458 Pio@LombardoAssociates.com www.LombardoAssociates.com 1 March 5, 2014 1
  2. 2. Nitrex TM  Passive Lower Cost Alternative  Achieving TN < 5 mg/l, averaging TN 3 mg/l  Can Produce TN < 2 mg/l &< 1 mg/l if desired / required 2 2
  3. 3. Typical Residential Process Train 3 3
  4. 4. Malibu, CA Plaza Wastewater Process Flow Has Achieved TN < 2 mg/l for 3+ years Produces Effluent Compliant with CA Title 22 Requirements for Unrestricted Water Reuse Kitchen Sewer Grease Trap Building Sewer Septic Tank TM Nitrex Nitrogen Reduction Filter – 2nd stage 4 Recirculation Tank Polishing Filter NitrexTM 1st Stage Filter Dispersal to Drainfields 4
  5. 5. 5 5
  6. 6. LaPine OR US EPA Study Results 6 6
  7. 7. Suffolk County Alternative Wastewater Technologies NitrexTM Testing by SCDHS Nitrex No. 1 2 3 4 5 TM EFFLUENT TN (mg/l) Sampled by H2M 1st 2nd Site Name sampling sampling Eastham MA 40 unit subdivision 1.33 1.37 Mashpee MA 24 unit subdivision with 5,200 sf commercial 0.54 1.57 Harvard MA 2 family installation 0.63 1.4 Malibu CA 16,000 gpd Shopping Center restaurants & retail 1.58 1.28 St. Leonard, MD single family installation 2.3 3.68 Average all sites 1.28 7 1.86 Average 1.35 1.055 1.015 1.43 2.99 1.57 7
  8. 8. Cluster / Neighborhood Wastewater Systems 8 8
  9. 9. Residential & Light Commercial Nitrex™ Wastewater System – Mashpee, MA Effluent Total Nitrogen 3 +/- mg/l Quarterly Operator Visits Drainfield Pump Station BIOFILTER DRAINFIELD PUMP STATION BioFilter NitrexTM Filter SEPTIC TANK NITREX™ FILTER Mashpee, MA Wastewater System at Substantial Completion Mashpee, MA Wastewater System at Completion 9
  10. 10. 10 10
  11. 11. Residential Development Producing Water with Total Nitrogen 2.2 mg/l  Eastham, MA  10,000 gpd design flow Septic Tank TM Nitrex Tanks Biofilt er Drainfiel d Bio-filter NitrexTM Tank Drainfield 11
  12. 12. Malibu Creek Plaza, Malibu, CA Malibu Creek Plaza 12 12
  13. 13. Malibu Village Plaza Wastewater System Configuration Biofilters Nitrex T M Tanks 1 st Stage Recirculation Tank 13 2 nd Stage Recirculation Tank Discharge Tank EQ Tank 13
  14. 14. Malibu Village Plaza Performance Achieves Unlimited Reuse Standards Total Nitrogen (mg/l) Annual Geo mean 4.90 1.72 1.90 2.04 2008 2009 2010 2011 3 yr Geo Mean 2.23 1.89 BOD (mg/l) Annual Geo mean 3.04 3.29 2.82 2.74 3 yr Geo Mean 3.02 2.91 TSS (mg/l) Annual Geo mean 3.31 3.23 2.71 2.56 3 yr Geo Mean 2.98 2.81 Turbidity (NTU) Annual Geo mean 1.44 0.57 0.38 0.36 3 yr Geo Mean 0.54 0.42  Removes Emerging Contaminants  Operator Requirements – 4 hours per week  Continuous electronic monitoring accessible via telephone/web 14 14
  15. 15. Bogue Sound Elementary School & Croatan High School Newport, NC Influent Quality: TN 70 - 149 mg/l 104 mg/l average Average Effluent Quality: TN 2.57 BOD 5 < 2 TSS 8.1 Fecal Coliform 8.8 MPN/100ML • 15 mg/l mg/l mg/l Sole source selected by NC Schools upon recommendation of North Carolina Dept. Natural Resources 15
  16. 16. Individual Onsite Wastewater Systems 16 16
  17. 17. 2 Family Residential Nitrex™Wastewater System  Harvard, MA  660 gpd Septic Tank Drip Irrigation BioFilter 17 NitrexTM Filter 17
  18. 18. Residential Retrofit Installations – Maryland Producing TN 1.7 mg/l BioFilter Septic tank NitrexTM Filter 18 18
  19. 19. Nitrex™ Costs •Total System costs for residential applications: New/Complete System Retrofit •Large $28,000 - $35,000 $20,000 - $25,000 systems sized based upon: •Total N to be removed – i.e. from 90 to 3 ppm of N •Generally •Comparison $50 - $75/gpd capacity for Turnkey Design-Build-Start-up with Conventional Systems • Generally 10+/- % savings on capital costs • 35+/- % savings on annual O&M costs •Operational and Management simplicity 19
  20. 20. Groundwater Treatment Options      20 Immediate Water Quality Benefit Addressing legacy issue of historical N discharges Natural flushing may take 5 - 30+ years after improvements made Estuarine Water Quality Standards  typically 0.35 mg/l TN Drinking water standard is 10 mg/l NO 3 -N 20
  21. 21. NitrexTM PRB for Groundwater Treatment Cross Section. NitrexTM PRB 21
  22. 22. Waquoit Bay PRB 22 22
  23. 23. November 2005, ~ 3.5 months after installation Groundwater Nitrate Removal in Waquoit Bay PRB NO3 (? M) - Grade Relative Elevation (m) PRB W1 2 150 130 110 90 70 50 30 10 W2 W3 W4 W5 W6 W7 W8 0 Waquoit Bay -2 -4 0 2 4 6 Relative Distance (m) 8 10 23 K. Foreman MBL, Woods Hole, MA 02543
  24. 24. NITRATE AT WAQUOIT BAY DATA COLLECTED BY WOODS HOLE MARINE BIOLOGICAL LAB (MBL) Groundwater Flow 24 24
  25. 25. Questions / Discussion Pio Lombardo, P.E. 25 25

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