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Unit 2 Aqueous Parts Cleaning

Unit 2 Aqueous Parts Cleaning. Baseline: Mineral Spirits. Pro’s Cleans well Turnkey Con’s VOC emissions Haz waste Worker safety Need-it-or-not servicing. P2 Alternatives. Sink-Top Immersion Unit Spray Cabinet Ultrasonic Unit. Microbial Sink-Top. Same design as solvent unit

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Unit 2 Aqueous Parts Cleaning

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  1. Unit 2 Aqueous Parts Cleaning

  2. Baseline: Mineral Spirits • Pro’s • Cleans well • Turnkey • Con’s • VOC emissions • Haz waste • Worker safety • Need-it-or-not servicing

  3. P2 Alternatives • Sink-Top • Immersion Unit • Spray Cabinet • Ultrasonic Unit

  4. Microbial Sink-Top • Same design as solvent unit • Solution = 110 to 120o F • Applicable for light-duty and quick cleaning jobs • Microbes reduce waste generation • Difficult to clean heavily soiled parts • Cost: $1,000 to $1,500

  5. Immersion Unit • Offers option to soak parts or manually scrub • Solution = 110 to 120 oF • Applicable for light to moderate soil buildup • Heavily soiled parts may require longer soak times • Cost: $1,700 to $3,500

  6. Spray Cabinet • Solution = 130 to 190 oF • Pressures of 40 to 60 psi • Applicable for heavily-soiled and large volumes of parts • High level of cleaning • Reduces cleaning labor by up to 80% • Cost: $1,700 to $50,000*

  7. Ultrasonic Unit • Microscopic scrubbing action • Solution = 130 to 190 oF • High level of cleaning • Cleans blind areas - transmissions and carburetors • Cost: $5,000 to $12,000

  8. Summary of Aqueous Alternatives • Microbial Sink-Top – light duty • Immersion Unit – when soaking is needed • Spray Cabinet – heavy duty/saves labor • Ultrasonic Unit – transmissions/carburetors

  9. Making It Work • Prevent rusting • rust inhibitors • wipe or blow dry • Maximize solution life • filter • skim oil • use microbes • Keep your microbes happy • don’t overload • don’t use aerosols • keep warm

  10. Maximize Solution Life: Filtration

  11. Maximize Solution Life:Oil Removal

  12. Aqueous Unit Servicing • Add water / chemical • Skim oil • Replace filter • Drain / replace solution Range: 30 minutes - 4 hours per month

  13. Waste Management • Spent Filters • Dispose as hazardous waste • Reusable filter • Oils • Skim and recycle with used oil • Spent Solution • Send off-site as hazardous waste (0 to 4 times per year) • Include sludge

  14. Waste Stream Analysis • Spent solution - 15 spent baths tested • Ten exceeded metals content (Cu, Pb, Cd, Zn) • Seven contained VOCs • Three exhibited fish toxicity • None met City of LA discharge limits (O&G, Cu, Pb, Zn) • Spent filters - two tested • One hazardous due to metals

  15. Comparison of P2 Options

  16. Take Home Messages • Aqueous cleaning works! • Implement multiple units to meet all your needs • Demonstrate units before purchasing • Maximize solution life to lower waste management costs

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