Guidance for Treatment of Airport Stormwater Containing Deicers (2013)

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

B-1 Using Appendix B Characteristics of Deicer Treatment Technologies Matrix Appendix B lists the 11 categories of treatment technologies presented in the guidebook and a summary of the characteristics of those technologies for multiple criteria. The information in the matrix is a summary of the data provided in the fact sheets for the individual technologies. When assessing the criteria associated with the specific deicer treatment technologies and comparing them to site-specific needs and characteristics, it is important to consider that the technology criteria values represent the potential capabilities of the technology based on the performance data for the technologies that was available to the research team. Many factors affect treatment performance, including: • The composition of the remainder of the deicer management system; • The degree of control, monitoring, and operational oversight applied at any given site; • The capacity of the treatment system and how the system is operated in relation to that capacity; • The extent to which proper maintenance is performed; • The inherent variation in stormwater characteristics at a given airport and among airports; • Ambient weather conditions; and • Proper pretreatment to prepare the stormwater for the primary treatment system. Therefore, the information provided in the Appendix B matrix is intended as guidance during technology selection and not as a guarantee of performance. A P P E N D I X B Deicer Treatment Technology Characteristic Matrix

Screening Value Parameter A c t i v a t e d S l u d g e A e r a t e d G r a v e l B e d s A e r a t e d L a g o o n s A n a e r o b i c F l u i d i z e d B e d R e a c t o r s D i s t i l l a t i o n M e c h a n i c a l V a p o r R e c o m p r e s s i o n M o v i n g B e d B i o f i l m R e a c t o r s P a s s i v e F a c u l t a t i v e T r e a t m e n t S y s t e m s P u b l i c W a s t e w a t e r T r e a t m e n t S y s t e m s P r i v a t e R e c y c l i n g F a c i l i t i e s R e v e r s e O s m o s i s Treatment method On-site biological On-site biological On-site biological On-site biological On-site physical On-site physical On-site biological On-site biological Off-site biological Off-site physical On-site physical Most applicable influent concentration characteristics Dilute stream1 Dilute stream Dilute stream Concentrated stream2 Highly concentrated stream3 Concentrated stream Dilute stream Dilute stream Dilute stream Concentrated stream Concentrated stream Typical minimum influent COD conc. (mg /L) None None None 2,700 300,000 10,000 None None None See MVR and distillation 10,000 Potential effluent COD conc. range (mg/L)4 10–30 50–100 30–100 40–100 8,000–15,000 50–1,000 10–30 10–100 Not applicable Not applicable 10–1,000 Treatment by- products Biomass and CO2 Biomass and CO2 Biomass and CO2 Biomass, Methane and CO2 High concentration glycol, distillate, and solids waste Intermediate concentration glycol, distillate, and solids waste Biomass and CO2 Biomass and CO2 Not applicable to the airport Not applicable to the airport Intermediate concentration glycol, distillate, and solids waste 1 Dilute stream = COD concentrations < 10,000 mg/l. Typical of deicer-affected stormwater from gate runoff, airfield runoff, and runoff segregated into low concentration fractions. 2 Concentrated stream = Influent COD concentrations > 10,000 mg/L (1%) and < 300,000 mg/L (30%). Typical of deicer-affected stormwater from deicing pad runoff, GRV (glycol recovery vehicle) collection, and stormwater segregated from online monitoring. 3 Highly concentrated stream = COD concentrations > 300,000 mg/L (30%). Typical of concentrate streams from MVR or reverse osmosis systems. 4 “Potential effluent COD conc. range (mg/L)“ represents the optimal potential performance based on review of existing treatment systems (when available). See the treatment technology fact sheets for additional details on the conditions used to determine the typical effluent concentrations. Results may vary based on individual circumstances. Typical treatment area footprint <1 acre >1 acre >1 acre <1 acre <1 acre <1 acre <1 acre >1 acre Not applicable Not applicable <1 acre Typical treatment/ equipment height <20 ft <20 ft <20 ft >20 ft >20 ft >20 ft <20 ft <20 ft Not applicable Not applicable <20 ft Open water surface Yes No Yes No No No Varies Varies No No No Deicer Treatment Technology Characteristic Matrix