The Metro W o Wastewater er R Reclam amation on D District Airfl flow and Od Odor M Mitigati tion Plan f for Delga gany Inter tercep eptor S System em Jim McQuarrie, Director of Strategy and Innovation Robert W. Hite Treatment Facility Outfall Facility
Water er P Pur ure e or P Polluted ed? Post - November Denver P er 18, 18, 196 1969 Althoug ugh h the S South P h Platte R River t throug ugh Denver er is grea eatly i improved ed f from t the e open en sew ewer it o once e was, the r e river er a at the n e north city ty limits ts doesn’t ’t sp sparkle. . Here, , streaming hot water e enters rs the d dirty ri river f fro rom a meat p packing plant.
Metro District – Product of Regional Collaboration • Formed in 1961 • Transmission and Treatment Services • 2 million people served (est.) Denver International Rocky Airport • 715-square mile service area Mountain Arsenal • 38-member Board of Directors Member Agencies and Special Connectors
th Ce 20 th Century I Infrastructure I Investments 1965 1965-ish Source: Colorado Division of Local Government, Demography Section
th Ce 20 th Century I Investments –Rober ert W W. Hite T e Trea eatmen ent F Facility 2016 2016 Source: Colorado Division of Local Government, Demography Section
Transmission System • Sanitary sewer (no stormwater) • 260 +/- miles of large-diameter pipe • 8-inch to 90-inch diameter South Platte Interceptor • Oldest from 1890 construction tunneling equipment • Mostly gravity flow – only 3 lift stations City Sewer in North Denver likely Delgany
Delgany Interceptor System on NWC Site I-70 DGC Interceptor Siphon (1977) Delgany Interceptor (1979 – RCP) 7
Odor a associated with Wastew ewater • Hydrogen Sulfide (H 2 S) • Biological breakdown of Proteins/Amino Acids during conveyance • What does it smell like? • We can notice it at low concentrations • 0.000013% • Not dangerous outside of the sewer • Stay out of sewers!
Historical Complaints 9
MODELING RESULTS OF TRANSMISSION SYSTEM 16
IDEAL ODOR INTERCEPTION AND TREATMENT LOCATION ODOR CTRL HERE 11
WHAT DOES AN ODOR TREATMENT SYSTEM LOOK LIKE? 12
Objectives for a Proactive Odor Control Strategy • Developed a road map for odor control in Transmission System • Integrate recommended odor mitigation Characterized Technologies strategies into capital project planning • Consider staff safety, comfort, and worksite conditions • Minimize complaints and maintain the Metro District’s good neighbor status Management Plan Commitment 13
Thank y you for r your i r interest! Public I Information - Kmerritt@mwrd.d .dst.c .co.u .us
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