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Overcoming Challenges in Aerosol Processing: Insights from Hennepin County

This document details the trials and tribulations encountered during the implementation of the Aerosol Kruncher™ in Hennepin County, highlighting significant operational milestones since the launch of the first Household Hazardous Waste (HHW) event in 1986. It outlines the growth of the program, budget allocation, and the innovative automation systems used, including hydraulic presses and can crushers. The narrative focuses on various operational challenges faced, their solutions, and the overall cost-benefit implications of the processing system.

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Overcoming Challenges in Aerosol Processing: Insights from Hennepin County

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  1. Trials & Tribulations of De-Canning with an Aerosol KruncherTM William Leonard September 22, 2005

  2. Hennepin County Facts • Size – 611 square miles • Population – 1,116,200 • Occupied Housing Units – 456,129 • Cities, Townships, Territories – 47 • County Seat – Minneapolis

  3. First HHW Event Collection • 1986 • 2 day collection (Friday & Saturday) • 1,200 Participants • 3,740 gallons paint and flammable liquids

  4. Permanent Facilities • BPTS • August 1990 • 2,896 participants • SHRAPWDOC • October 1993 • 3,760 participants

  5. Program Growth

  6. Program Budget • $5,124,000 • Major Categories • $1,600,000 Disposal • $1,580,000 Operations (facilities & events) • $1,150,000 Processing (electronics & batteries)

  7. Automating System • Log splitter • Can Crushers • Mechanical openers • Shredders

  8. The KRUNCHER

  9. Description • Hydraulic Press • Two Rams • Shear • Plunger • 100,000 psi

  10. Processing Info

  11. Tribulations and Solutions • Bridging in hopper

  12. Tribulations and Solutions • Change in Staff

  13. Tribulations and Solutions • Tears to the Pump Diaphragm

  14. Tribulations and Solutions • Lid Seal Leaks

  15. Tribulations and Solutions • Lid Seal Leaks

  16. Tribulations and Solutions • Finger Painting

  17. Tribulations and Solutions • Float Switch

  18. Tribulations and Solutions • Plate Warping • Burp Valve

  19. Tribulations and Solutions • Aerosol Processing

  20. Costs • Kruncher $140,000 • Ancillary Equipment & Installation $178,900 • Total Initial Investment $318,900 • Additional Costs $248,970 • Total Invested $567,940

  21. Program Savings

  22. Summary • Cost Benefit • Safety - $86,212 - Exposure - Lifting - Repetitive

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