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PDX DEICING STORMWATER SYSTEM. Presentation for Pacific Northwest Pretreatment Conference September 15, 2005. Presentation prepared by Richard Vincent Deicing Operations Manager Portland International Airport Port of Portland – (503) 460-4685 [email protected]

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PDX DEICING STORMWATER SYSTEM

Presentation for

Pacific Northwest Pretreatment Conference

September 15, 2005


Presentation prepared by

  • Richard Vincent

    Deicing Operations Manager

    Portland International Airport

    Port of Portland – (503) 460-4685

    [email protected]

  • Eric DeBerry

    Pretreatment Permit Manager

    City of Portland Bureau of Environmental

    Services – (503) 823-5538

    [email protected]


Deicing activites

FROST DEICING & ANTI- ICING

AIRCRAFT

RUNWAYS & TAXIWAYS

WINTER STORM EVENTS

AIRCRAFT DEICING

RUNWAY, TAXIWAY AND RAMP DEICING

LANDSIDE ROADS & WALKWAYS

DEICING ACTIVITES



Winter storm event
WINTER STORM EVENT

JANUARY2004


Aircraft deicing flight safety
AIRCRAFTDEICING& FLIGHT SAFETY

  • Ice accumulation of 1/64TH of an inch on the leading edge of an aircraft wing decreases lift on takeoff by as much as 25%

  • FAA requires that aircraft wings, propellers, windshield, engines, flight instrument systems, fuselage and control

    surfaces must be free

    of frost, ice and/or

    snow prior to taking

    off – Federal Aviation

    Administration Regulation

    (FAR) Part 121


Bod concentrations of approved chemicals

FAA APPROVED AIRCRAFT DEICERS

ETHYLENE GLYCOL

PROPYLENE GLYCOL

FAA APPROVED PAVEMENT DEICERS

POTASSIUM ACETATE

SODIUM FORMATE

*Values represent pure product. The glycols are diluted at least 50% prior to application

BOD CONCENTRATIONS OF APPROVED CHEMICALS

5.6 lbs/gal

9.0 lbs/gal

1.2 lbs/gal

0.6 lbs/gal


Bod biochemical oxygen demand
BOD – Biochemical Oxygen Demand

  • Measure of how much dissolved oxygen is being consumed as microbes break down organic matter.


Bod test considerations
BODTestConsiderations

  • Results are not absolute values, they are subject to variability (seed quality, dilution, pH)

  • Difficult to compare results between Labs

  • BOD5 test takes five days to complete


Bod vs cod
BOD vs. COD

  • COD results within hours vs. days

  • Statistical correlation can be made between BOD and COD

  • For deicing glycols: BOD mg/L = 0.62(COD) + 142 mg/L


Pdx water quality related permits
PDX WATER QUALITY RELATED PERMITS

  • OREGON DEQ ISSUED PERMITS

    • INDIVIDUAL NPDES DEICING PERMIT

    • 1200-COLS GENERAL STORMWATER PERMIT

    • 1700-B WPCF

    • INDIVIDUAL NPDES DEWATERING PERMIT

    • 1200-CA EROSION CONTROL PERMIT

    • MS-4 COPERMITEE

  • CITY OF PORTLAND – BUREAU OF ENVIRONMENTAL SERVICES (BES)

    • PRETREATMENT PERMIT


City of portland pretreatment permit requirements
City of Portland Pretreatment Permit Requirements

  • Daily maximum at will mass discharge limit of 1,200 lbs BOD.

  • Controlled dry weather BOD limit of 5,000 lbs per day weekdays, 10,000 lbs per day weekends. Requires BES approval and secondary treatment.

  • Discharge shall not exceed 300 gpm.


Two collection systems
TWO COLLECTION SYSTEMS

  • CONCENTRATED COLLECTION SYSTEM

    • Collects high strength material from aircraft deicing activities near the terminal

  • DILUTE COLLECTION SYSTEM

    • Collects runway & taxiway deicing materials as well as drip and shear from aircraft maneuvering for take-off

    • Provides a back-up to the concentrated system





CONCENTRATED SYSTEM

  • SUPERVISORY CONTROL AND DATA ACQUISITION SYSTEM (SCADA)

  • FOUR PUMP STATIONS

  • 2 + MILES OF PRESSURE LINES

  • REMOTE VALVES

  • FIVE BOD METERS

  • FLOW METERS

  • 2 MILLION GALLON STORAGE TANK

  • SNOW CONTAINMENT PAD

  • TRUCK LOAD-OUT FACILITY



Glycol recovery vehicles
Glycol Recovery Vehicles

On standby whenever the temperature is below 40° FMost efficient for frost deicing operationsLimited performance during freezing precipitation events




Two million gallon storage tank truck load out facility
TWO – MILLION GALLON STORAGE TANK & TRUCK LOAD-OUT FACILITY






Bod meter isco airport biox 1015
BOD METER – ISCO AIRPORT BIOX 1015

  • Measures level of BOD in real time

  • Allows the diversion of flow based on BOD concentration

  • Key component in loading calculations

  • PDX operates twelve (12) BIOX instruments

  • $60,000 per instrument

  • $250,000 per year in operations/maintenance costs



Bio reactor

Bio-Media

Matrix

Bio-Reactor


Biox limitations
BIOX Limitations

  • Adaptation period for BOD sources other than glycols

  • Limited ability to detect or measure insoluble BOD sources due to short residence time in the medium.



Biox field modifications
BIOX Field Modifications

  • Replaced existing fittings with more bio-compatible materials

  • Adjusted pH of nutrient feed

  • Eliminated residual chlorine in City feed water

  • Feed biomass propylene glycol, potassium acetate & sodium formate


Biox maintenance requirements
BIOX Maintenance Requirements

  • Two to three weeks to start-up all twelve meters at the beginning of the season

  • Approximately 7 hours per week per instrument for regular maintenance and calibration

  • Staff must be available 24/7 to respond to BIOX alarms

  • Two to three weeks to mothball all twelve meters at the end of the season





Scada reports supervisory control and data acquisition
SCADA Reports TANK)Supervisory Control and Data Acquisition


Compliance monitoring
Compliance Monitoring TANK)

  • Airport - BIOX accepted for BOD control

  • Airport - Continuous pH monitoring

  • Portland - A grab sample is taken, and the BIOX reading is recorded. If the sample result is within + or – 15% of the BIOX reading, the sample is in compliance.


DILUTE SYSTEM TANK)

  • SUPERVISORY CONTROL AND DATA ACQUISITION SYSTEM (SCADA)

  • FIVE PUMP STATIONS

  • 2 + MILES OF PRESSURE LINES

  • REMOTE VALVES

  • SEVEN BOD METERS

  • FLOW METERS

  • 13 MILLION GALLON DETENTION BASIN









SCADA SYSTEM DISPLAY – PUMP STATION I TANK)(DILUTE DETENTION BASIN)


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