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Pollution Prevention and Control Technologies for Plating Operations
Section 3 - Chemical Recovery
3.8 MESHPAD MIST ELIMINATORS
3.8.6 Performance Experience
Eight respondents to the Users Survey provided some detailed data covering their experience with the meshpad mist eliminator technology. A summary of their responses are shown in Exhibit 3-71 and discussed in this section.
- Meshpad mist eliminators had the highest average satisfaction level among recovery technologies (4.1 on a scale of 1 to 5, with 5 being most satisfactory). Also, all respondents indicated that this technology satisfied the need for which it was purchased. The following is a breakdown of the reasons why shops purchased this technology (multiple responses given by some shops):
To meet or help meet effluent regulations:........4 To reduce plating chemical purchases:.............5 To reduce the quantity of waste shipped off-site:.2 To reduce wastewater treatment costs:.............2 To improve product quantity:......................1 Reduce emissions or meet air standards:...........3
- The use of meshpad mist eliminators for chromium recovery generally did not impact production quality or the rate of production. The following responses were provided:
Product Quality Production Rate Improved 1 1 No Change 5 5 Decreased 0 0
- All plating shops providing responses indicated that, based on their experience with this technology, they would purchase the same type of equipment from the same vendor. The following is a breakdown of their responses:
Purchase the same technology from the same vendor:.....7 Purchase the same technology from a different vendor:..0 Purchase a different technology:.......................0 Do nothing:............................................0
- None of the shops indicated that a meshpad mist eliminator was the cause of an effluent compliance excursion.
- The major savings from the operation of a meshpad mist eliminator was the result of reductions in bath chemical use. The reported chemical savings ranged from $250 to $5,000 per year. One shop also reported a $1,000 per year savings due to reduced sludge disposal costs.