Environmental Engineering Reference
In-Depth Information
TABLE 9.1
Annual Operating Parameters for Methyl Chloroform Vapor Degreasers at Southeastern U.S. Air Force Bases and Potential
Accumulation of 1,4-Dioxane in Solvent Waste
Annual
Solvent Waste
Generation
(gallons)
Annual
1,4-Dioxane
Consumption
(lb/kg)
Annual
1,4-Dioxane
in Solvent
Waste (lb/kg)
Annual
1,4-Dioxane
in Solvent
Waste (wt%)
Annual
1,4-Dioxane
Lost to Vapor
(lb/kg)
Vapor
Degreaser
Number
Vapor
Degreaser
Dimensions (ft)
Annual
Number of
Batch Changes
Reservoir
Volume
(gallons)
Annual
Solvent Usage
(gallons)
Annual
Emissions
Loss (%)
1
4.5 × 3 × 5.6
10
50
654
275
58
216/98
158/72
6.9
34/15
2
8 × 4 × 8
6
110
3850
990
74.3
1271/578
927/422
11.2
255/116
3
10 × 3 × 10
8
110
4180
1320
68.4
1379/627
1007/458
9.1
255/116
Source:
Data from Tarrer, A.R., et al., 1989,
Reclamation and Reprocessing of Spent Solvent
. Park Ridge, NJ: Noyes Data Corporation.
Notes:
1,4-Dioxane consumption was based on an assumed initial content of 3 wt%. 1,4-Dioxane content in liquid waste applies the 73% 1,4-dioxane partitioning factor for 1,4-dioxane at
methyl chloroform's 78°C boiling point (Spencer and Archer, 1981). Weight percent 1,4-dioxane in liquid waste was obtained as the ratio of calculated kilograms of 1,4-dioxane in
the waste to the volume of the waste in liters. This screening-level calculation neglects 1,4-dioxane losses due to removal in the water trap and does not account for any addition of
make-up solvent to the vapor degreaser between solvent changes. See Section 1.1.1.3 for more on vapor degreasing.
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