Term
| justification for silver recovery program |
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Definition
dwindling worldwide supply of silver
monetary return
compliance with fed and state pollution laws |
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Term
| bans the replacement of toxic substances in public waterways and SEWER SYSTEMS |
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Definition
| water control act of 1972 |
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Term
| requires that AVAILABLE DEVICES must remove toxic substances from waste water |
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Definition
| Resources Conservation/ Hazardous Waste Act of 1976 |
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Term
| requires the best available methods be used to remove toxic substances from WASTE WATER |
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Definition
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Term
contains many guidelines affecting film processing and silver recovery methods
requires a PERMIT TO DUMP more than 27 gallons of waste per month in public sewers
SHIPPING MANIFESTS are required |
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Definition
| Resource Conservation and Recovery Act of 1987 |
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Term
| operates by having the fixer drain into the top of a plastic bucket, filter through steel wool, and overflow through a tube connected to bottom of the container |
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Definition
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Term
no operating costs
low initial expense
no moving parts/electricity required
relatively high efficiency rating |
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Definition
| advantages of metallic replacement |
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Term
not as efficient as other methods
silver recovered is in form of sludge
unit must be replaced each recovery cycle
payments are delayed |
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Definition
| disadvantages of metallic replacement |
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Term
| __% of recoverable silver is removed with metallic replacement |
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Definition
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Term
uses electric current to reclaim silver
two types of units used |
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Definition
| electrolytic silver recovery |
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Term
connected to fixer overflow line from processor replenishment system
once unit recovers silver, fixer is flushed down the drain |
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Definition
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Term
| designed to recover silver from used fixer and then recirculate fixer back into processor |
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Definition
| recirculating electrolytic |
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Term
| silver is recovered in form of silver flake, which ____ pure |
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Definition
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Term
| sludge is only ___ to ___% pure |
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Definition
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Term
dwell time
fixer pH
amperage
maintenance |
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Definition
| factors affecting silver recovery |
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Term
| time that fixer remains in recovery device |
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Definition
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Term
| longer the dwell time, ___ the efficiency |
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Definition
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Term
| fixer pH must be kept below |
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Definition
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