Jennifer Soltys MCES IWPP Engineer Intern - PowerPoint PPT Presentation

investigating soluble nonreactive phosphorus spikes for the metropolitan wastewater treatment plant n.
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Jennifer Soltys MCES IWPP Engineer Intern
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Jennifer Soltys MCES IWPP Engineer Intern

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  1. Investigating Soluble Nonreactive Phosphorus Spikes for the Metropolitan Wastewater Treatment Plant Jennifer Soltys MCES IWPP Engineer Intern

  2. The Greening of Our Waters http://photography.nationalgeographic.com/photography/photo-of- the-day/algae-bloom-lake-erie-essick/

  3. What is Soluble Nonreactive Phosphorus ? =+ Total Phosphorus Soluble Total Phosphorus (sTP) Total Particulate (Solids) Phosphorus Soluble Nonreactive Phosphorus (sNRP) Soluble Reactive Phosphorus (sRP)

  4. The Problem of sNRP • Nonreactive . . . BUT • sNRP ~46% of effluent TP • MPCA proposed TP limit of 0.28 mg/L

  5. The Problem of sNRP • Plant Averages • sNRP ~ 580 lb/day • sTP~ 3000 lb/day • Plant Spikes • sNRP ~ 2000 lb/day • sTP~ 5000 lb/day 2000 lb http://www.fanpop.com/clubs/volkswagen-beetle/images/36942262/title/herbie-love-bug-photo

  6. sNRP: Proactive Approach • Data analysis • Identify industrial uses • Identify trends • Find the sNRP source • Reduce or eliminate

  7. Potential Sources • Primary Uses • Flame retardants • Antifoaming agents • Plasticizers • Additional Uses • Solvents • Mechanical/aircraft • Lab R&D • Agricultural • Construction • Pharmaceutical/ personal care • Food/animal industry • Mining • Printing

  8. sNRP Trends

  9. sNRP Trends • Spike ~2000lb/day batch discharges Potential Water Volumes Corresponding to Phosphorus Loadings

  10. Solution: Find the SNRP Source

  11. 2014 Results: Tracking sNRP • 61 sNRP Influent Spikes (as of August 31) • 12 sNRP Spikes since June 1 • Removed Eastern Metro (Site M003) as an option • Narrowed scope to flows in or into St. Paul and Minneapolis (Site MH TB 3)

  12. Next Steps • Continue the phosphorus investigation • Investigate suspect uses • Continue sampling industries • TracksNRP • Monitor • Metro Plant’s influent and effluent streams • Sampling points upstream

  13. Questions?