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Mercury
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Phase II Reports >> Pretreatment Manual
Facilities Loadings
| Pretreatment Manual |
Tech. Identification
Hg Management Guidebook | Mercury Products
Database
For more
information, contact David Eppstein by email at
deppstein@masco.harvard.edu,
or by calling 617-632-2860.
APPENDIX B
SAMPLE PAYBACK PERIOD ANALYSIS
APPENDIX B - SAMPLE PAYBACK PERIOD ANALYSIS
OPPORTUNITY: PHOTOGRAPHIC CHEMICAL USE
OPTION: FIXER RECIRCULATION
COST
DESCRIPTION |
SPECIFIC ITEM |
COST
($) |
COMMENTS |
|
|
1. Equipment |
Recirculating silver recovery unit |
3320.00 |
Current
List Price |
2. Installation |
Performed by distributor |
200.00 |
Quoted
price |
3. Other |
120VCircuit
|
100.00 |
Estimated
cost |
|
|
|
|
. Materials/Reagents |
Fixer usage |
+2423.25 |
$7.00/gal,
277 dpy, 2.5 gpd less 50% |
| |
Special fixer additive |
-375.00 |
1 qt / 10
gal of fixer |
2.
Treatment/Disposal |
Credit for recovered silver |
+159.50 |
15 %
increased silver
recovery at $3.40/troy oz. |
3. Labor |
Mechanical
maintenance |
-60.00 |
Assume 15
minutes/mo @ $20/hour |
4. Utilities |
Electricity |
0.00 |
Assumed
negligible |
5. Regulatory |
|
0.00 |
No impact |
• Sum of Annual Operating Cost Changes = 2,147.75
(Total Yearly Savings) |
PAYBACK PERIOD
ANALYSIS |
CALCULATION |
PAYBACK
PERIOD (YEARS) |
COMMENTS |
Total Capital
& One-time Costs
Total Yearly Savings |
3,620.00
2,147.75 |
1.69 |
Reduced
fixer is largest factor |
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