Deicing Fluid and Stormwater Management At Cincinnati/Northern Kentucky International Airport

Transcription

1 Deicing Fluid and Stormwater Management At Cincinnati/Northern Kentucky International Airport Kenton County Airport Board 2009 ACI-N/A/ATA/RAA Deicing Management Conference July 8, 2009 Don Chapman CVG Jason Sundrup, CVG Kevin Flynn, Delta Airlines

2 January 27 th & 28 th, 2009

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5 Elijah Creek 3 parallel N/S Runways 1 E/W Runway 7000 Total Acres 2000 Acres Paved Gunpowder Creek

6 KPDES Permit Monitoring Requirements Flow BOD TSS Oil/Grease Ammonia Dissolved Oxygen Potassium Ethylene/Propylene Glycol Total Organic Carbon

7 KCAB Permit Limits G-004 Summer/Winter E-003 Summer/Winter BOD (mg/l) 50/85 BOD (mg/l) 70/150 TSS (ppm) 60/60 TSS (ppm) 60/60 Oil/Grease (mg/l) 15/15 Oil/Grease (mg/l) 15/15 Ammonia (mg/l) 4/10 Ammonia (mg/l) 10/10 D.O. (mg/l) 4.0 D.O. (mg/l) 4.0

8 The Problem Potential Environmental Impacts Fish Toxicity Odor Complaints Nuisance Algae Growth High Biochemical Oxygen Demand Low Dissolved Oxygen KPDES Permit Violations

9 The Airport-Wide Deicing Fluid Management Philosophy Source Separation Deicing Pads Spent Deicing Fluid Storage Glycol Concentration & Recycling Source Reduction-Pollution Prevention Education & Training Best Management Practices Storm water Collection & Treatment Storm water Detention/Aeration

10 KCAB Deicing Fluid Collection 21 Deice Pads Approximately 68 Acres

11 KCAB Deicing Fluid Storage 8 Million Gallon Total 6 Million Gallon South 2 Million Gallon North

12 Glycol Processing and Recycling Facility

13 Evaporator

14 KCAB Best Management Practices Perimeter Marking and Nose Wheel Blocks Surveillance Cameras and Wig Wag Lights

15 Operation and Maintenance of Deicing Fluid Collection System Controlled By Airport FMS Maintenance and Repair of Diversion Valves and Pump Stations

16 Collection of Underdrains

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18 Glycol Usage Best Management Practices Fluid Blending and Forced Air

19 Glycol Usage Best Management Practices Fluid Blending Beginning in 2004/05, our de-ice operation implemented glycol fluid blending process. Utilizing our Type I Glycol Fluid proportioning system, we can dictate the amount of Type I glycol used to mix De-icing fluid, based on the day s weather and temperature forecast.

20 Glycol Usage Best Management Practices Fluid Blending Example: Current WX is 27 F OAT and Light Snow. Based on the OAT the freeze point of Type I de-icing fluid must be 32 F or lower. Old Method Applying 50/50 Mix (freeze point -18 F) Type I on B-757, using an est. 300 gallons of fluid to de-ice (clean) AC, we use 150 gal. of glycol Current Method Applying 10/90 Mix (freeze point 24 F) Type I on B-757, using an est. 300 gallons of fluid to de-ice (clean) AC, we used only 30 gallons of glycol.

21 Glycol Usage Best Management Practices Forced Air Forced Air utilizes an air stream to remove accumulation of frozen contamination from the aircraft with or without fluid.

22 Deice Fluid Usage History Deice Season Type I (gal) 391, , ,084 Type IV (gal) 42,354 84,271 32,832 Total Glycol Usage (gal) 433, , , ,936 48, , ,441 64, , , , , ,191 27, , ,334 41, , ,079 69, , ,693 52, ,931

23 Elijah and Gunpowder Creek Storm Water Conveyance

24 100 Simulated Daily Average Flow Assessment Combined (GT-1, GT-2-C, & DHL-C) Deicing Season Calculated Flow 10 Flow (MGD) Q = 1.5 MGD 1 Baseflow = 0.50 MGD /1/ /20/1998 1/9/1999 2/28/1999 4/19/1999 Date / Time Notes : - Rainfall data used: 10/1/98-4/30/99 CVG Daily Summary data obtained from the National Climatic Data Center Assumptions: - Estimated base flow rate (due to infiltration) added to each calculated flow rate to obtain simulated flow - Precipitation is uniform over entire drainage basin - Predicted flow based on Rational Method (Q=CiA, w here Q = flow, C = curve number, i = precipitation intensity, A = area) - Time of concentration (t c ) is 0 - = Treated Flow - All precipitation occured as rainfall

25 Elijah and Gunpowder Creek SWTP Collection Areas

26 Storm Water Conveyance Design Basis Criteria Surface Area 2,910 Acres 3 X Base Flow Collection and Treatment 7.0 mg/l BOD 36,000 lbs./day BOD

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28 Major System Components 10 Pump Stations 7,000 Linear Feet of Gravity Sewers 36,000 Linear Feet of Force Mains 14 Million Gallon Equalization 7 MGD Capacity Sludge Management 4.5 MG Storage

29 Concentration Spectrum Concentration Spectrum Concentrated Deicing Fluids (vacuum trucks, collection trenches) Diluted Deicing Fluids (collection trenches) Contaminated Runoff (storm sewer, surface runoff) >20% range 0.1% - 20% range <0.1% - ppm range Recycling Collection and Recycling Stormwater treatment

30 Runway and Pavement Deicers Potassium Acetate Sodium Formate Sodium Acetate

31 Stormwater collection Structure

32 TYPICAL PUMP STATION

33 Storm Water Treatment Plant

34 Winter Weather Winter weather is inconsistent. Fluctuating snow fall Rapid thaw and freeze cycle

35 Two Phases of Construction Phase one: SBR (Sequencing Batch Reactor) Gunpowder Creek only 1.5 Million gallon capability Constructed in 2003 Modified in 2005 Modified to a 3 million gallon capability

36 Two Phases of Construction Phase two: EAAS (Extended Aeration Activated Sludge) treatment plant Gunpowder and Elijah Creek 7 million gallon pumping capacity Constructed in 2006

37 Plant Operating Parameters Maximum daily influent flow of 7.0 MGD Maximum daily BOD load of 36,000 lb. Biomass concentrations of 1800 to 3000 mg/l F:M ratio of 0.03 Do not feed every day Air Flow Basin 1: 1600 SCFM Basin 2 & 3: 2900 SCFM Designed effluent quality 50 mg/l BOD 30 mg/l TSS

38 Storm Water Treatment Plant Flow Diagram Polymer Addition (Aid Settling) Chemical Addition EAAS Basin #1 (3.0 MG) C larifier #3 Influent Flow Box Splitter Box EAAS Basin #2 (5.5 M G) C larifier #2 C larifier #1 EAAS Basin #3 (5.5 M G) Sludge RAS/W AS W aste Activated Sludge Return Activated Sludge Decant Supernatant Centrate R oll O ff Box (20 cu.yd.) Dewatered Sludge Centrifuge Thickened Sludge Sludge Holding Tank (1.5 MG) Digester #2 (1.5 M G) Digester #1 (1.5 M G) R oll O ff Box (20 cu.yd.) Polymer Addition (Coagulant) Digested Sludge Aeration to Sludge Management System Blower #1 Blower #2 Blower

39 Aeration Basins 14 million gallons of storage 23 aeration headers 621 diffuser banks Aerate and mix

40 Turblex Blower System Four Turblex blowers supply air to the entire treatment facility Two 450 hp blowers Two 300 hp blowers

41 Supplementary Chemical Feeding Nitrogen, Phosphorous, and Glycol Urea ammonium nitrate Phosphoric acid Glycol Ratio

42 Activated Biomass Spent aircraft deicing fluid and runway deicer is broken down with by an aerobic activated biomass, airport bugs. Majority of biomass consisting of Stalk ciliates, free swimming ciliates, and rotifers. Some filamentous, and nematodes.

43 Clarifiers From the aeration basins the mixed liquors flows into the three clarifiers. Sized proportionally to corresponding basins Scum trough RAS/WAS pumps

44 Dewatering Influent solids content of 0.8% to 1.2% Polymer addition added as needed Dewatered sludge leaves centrifuge at 15% to 18% Dewatered sludge is hauled away or used on site for beneficial reuse

45 Plant Effluent Parshall flume Composite sampling Dissolved oxygen and ph monitoring Effluent BOD permit limit of 85mg/L during winter months.

46 COD Removal Efficiencies Removal Efficiency for 1/1/2009 thru 3/31/2009 Influent COD (mg/l) Influent COD (lbs) Effluent COD (mg/l) Effluent COD (lbs) Total 146, ,577, , , Average 1, , , Removal Efficiency COD (mg/l) COD (lbs)

47 Operational Cost O&M: $165,000 Electric: $304,000 Staffing: $200,000 Total: $669,000

48 Aeration at the North and South Retention Ponds 5 Aerators on Gunpowder Creek 3 Aerators on Elijah Creek

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50 Gunpowder Creek BOD Data November November November November December December December December December January January January January Febuary Febuary Febuary Febuary March March March March April April April April May May May Date Permit limit BOD (mg/l)

51 Elijah's Creek BOD Data November November November November December December December December December January January January January Febuary Febuary Febuary Febuary March March March March April April April April May May May Date Permit Limit BOD (mg/l)

52 Creek Improvements Return of wildlife Diversification of fish species Removal of odor from water Creek freezes over during cold spells of winter

53 Questions