EXTENSION OF METAL WORKING FLUID SERVICE LIFE
 |
|
||||||||||||
| Overview: | Generation of waste
metal-working fluids can be minimized by extending the useful life of the
fluids. Metal-working fluid life is a function of various factors
including: type of metal working operation, type/quality of fluid used,
housekeeping practices, contamination, bacterial contamination, and water
quality.
Spent metal-cutting fluids may be considered hazardous wastes due to the products’ formulation or by absorbing contaminants through metal working operations. Under 40 CFR Part 279, Used Oil Management Standards, used oil is defined as oil refined from crude (or any synthetic oil) used as a lubricating, hydraulic, or heat transfer fluid that has become contaminated through use. Coolants may be managed under these regulatory provisions and recycled as opposed to disposed. Extending the fluid life by maintaining its cleanliness is a practical means of reducing a hazardous waste stream. Modular systems are available for on-site, batch recycling of metal working fluids. These systems clean the fluids by removing solids, bacteria, and tramp oil contaminants. These systems may incorporate filtration, centrifugation, pasteurization, oil skimming, and/or coalescence processing steps. Water or fluid concentrate may be added to the reclaimed fluid to adjust the fluid concentration to the desired level. The fluids are then returned to the machine sump(s). Milacron markets modular systems for collection, treatment, and recycling of metal working fluids. One such unit was used for short time at the Naval Shipyard in Portsmouth, New Hampshire. The capital costs for a fluid collection device and recycle module would start at around $40,000. An alternative to purchase, operation, and maintenance of recycling equipment by the shop is the use of mobile recycling services, such as Fluid Recycling Services. These services utilize similar processing steps to those described above to treat metal working fluids on-site on a periodic basis. There is typically a minimum charge per visit plus a rate per gallon of fluid treated. For shops that generate less than 25 tons/yr. of waste cutting oil, or less than 45 tons/yr. of waste soluble oil machine coolant, a mobile fluid recycling service would probably be the preferred arrangement. For shops that generate larger amounts of waste metal working fluids, purchase of in-house recycling equipment should be considered. For either option, the economics of recycling metal working fluids are improved by minimizing the number of different metal working fluids used in one shop. | |||||||||||||||||||||
| Compliance Benefit: | Recycling metal working
fluid may help facilities meet the requirements of waste reduction under
RCRA, 40 CFR 262, Appendix. Recycling of cutting oil may allow the
used oil to fall under the less stringent regulations of 40 CFR 279
as opposed to the hazardous waste regulations in 40 CFR 260 through
268. In addition, under 40 CFR 261.5 generators that recycle
their used oil and manage it under 40 CFR 279 do not have to count
the used oil into their monthly totals of hazardous waste generated. The
decrease in the quantity of hazardous waste generated monthly may help a
facility reduce their generator status and lessen the amount of
regulations (i.e. recordkeeping, reporting, inspections, transportation,
accumulation time, emergency prevention and preparedness, emergency
response) they are required to comply with under RCRA, 40 CFR 262.
Recycling of used oil generally requires a facility to store large
quantities of used oil on site. A Spill, Prevention, Control and
Countermeasure Plan is required to be developed and implemented under
40 CFR 112 for facilities that store certain amounts of oil on
site.
The compliance benefits listed here are only meant to be used as a general guideline and are not meant to be strictly interpreted. Actual compliance benefits will vary depending on the factors involved, e.g. the amount of workload involved. | |||||||||||||||||||||
| Materials Compatibility: |
No materials compatibility issues have been identified. | |||||||||||||||||||||
| Safety and Health: | There are mild skin and
eye irritation effects associated with these compounds. Personal
protective equipment should be used. Consult your local industrial health
specialist, your local health and safety personnel, and the appropriate
MSDS prior to implementing this technology.
| |||||||||||||||||||||
| Benefits: |
| |||||||||||||||||||||
| Disadvantages: |
| |||||||||||||||||||||
| Economic Analysis: | The following example is
for a facility that generates a fairly large quantity of spent cutting
fluid (3,000 gallons per year). Most facilities will generate less than
this amount thus extending the potential payback period. For smaller
shops, off-site recycling services may be more cost effective. The cost
for fresh cutting fluid is based on vendor information. An economic
analysis comparing on-site cutting fluid recycling versus disposal can be
found on datasheet 6-I-8 Cutting Fluid Recycler.
Assumptions:
Annual Cost Comparison for On-Site Recycling or Off-Site Recycling of Used Cutting Fluid
Economic Summary Annual Savings for On-site Recycling:
-$1,200 Click Here to view an Active Spreadsheet for this Economic Analysis and Enter Your Own Values. To return from the Active Spreadsheet, click the reverse arrow in the Tool Bar.
| |||||||||||||||||||||
| Approving Authority: | Approval is controlled
locally and should be implemented only after engineering approval has been
granted. Major claimant approval is not required.
|
| NSN/MSDS: |
*There are multiple MSDSs for most
NSNs. | ||||||||||
| Points of Contact: | Navy: Mr. Richard Collette Shop 31, Bldg.300, Portsmouth Naval Shipyard Portsmouth, NH 03804-5000 Phone: (207) 438-5330 Fax: (207) 438-5321 |
| Vendors: | This is not meant to be a complete list, as there are other manufacturers of this type of equipment. |
| CECOR Inc. 102 Lincoln Street Verona, WI 53593 Phone: (608) 845-6771 or (800) 356-9042 Fax: (608) 845-6792 URL: http://www.cecor.net/ | |
| Waterlink Inc. 1350 Euclid Ave. 10th Fl. Cleveland, OH 44115 Phone: (216) 861-9195 Fax: (216) 861-9849 URL: http://www.waterlink.com/ | |
| Master Chemical Corporation 501 West Boundary Perrysburg, OH 43551-1263 Phone: (419) 874-7902 FAX: (419) 874-0684 URL: http://www.masterchemical.com/ | |
| Milacron Manufacturing
Technologies 2090 Florence Ave. P.O. Box 63716 Cincinnati, OH 45206-2425 Phone: (513) 487-5000 FAX: (513) 487-5057 |
| Sources: | Mr. Cliff Myers,
Defense Supply Center Richmond, March 1999.
|
[Back]