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Biotreatment method for waste photographic film

A photosensitive film and biological treatment technology, applied in the field of biological treatment of waste photosensitive film, can solve the problems of serious secondary pollution, large discharge of waste water and exhaust gas, serious pollution, etc. Effects of processing costs

Inactive Publication Date: 2007-02-14
上海玉汇环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above reaction process that although the yield of silver is 95-97% when using the above method to treat waste film or waste photographic paper, the discharge of waste water and waste gas is large, and it is difficult to treat the "three wastes" and cause secondary pollution. is more serious
[0005] In hydrometallurgy, the obtained silver sulfide can be smelted in a coke furnace to produce sponge silver, but this method is particularly polluting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The biological treatment method of the waste photosensitive film in this embodiment, comprises the following steps:

[0030] 1. Preparation of bacterial agent: cultivate actinomycetes and saccharomyces, weigh respectively 20% actinomycetes and 80% saccharomyces by weight and mix to prepare mixed strains; then the weight ratio of bacteria is 3:1 Add the mixed bacteria into the carrier of rice bran and fully mix to prepare the bacteria agent;

[0031] 2. Crush: Crush the waste photosensitive film into about 5×5cm;

[0032] 3. Mixing: Mix 10 kg of the waste photosensitive film crushed in the second step with 1000 kg of the bacterial agent prepared in the first step;

[0033] 4. Stacking and extraction: stack the mixture of bacteria agent and film in the third step in a cement tank and cover it. The stacking height is 1m. When stacking, the temperature is controlled in the range of 30-35°C and the humidity is controlled at 30%-40%. range, the stacking time is 48 hours;

...

Embodiment 2

[0037] The biological treatment method of the waste photosensitive film in this embodiment, comprises the following steps:

[0038] 1. Preparation of bacterial agent: cultivate actinomycetes and saccharomyces, weigh respectively 20% actinomycetes and 80% saccharomyces by weight and mix to prepare mixed strains; then the weight ratio of bacteria is 3:1 Add the mixed bacteria into the carrier of rice bran and fully mix to prepare the bacteria agent;

[0039] 2. Crush: Crush the waste photosensitive film into about 5×5cm;

[0040] 3. Mixing: Mix 15kg of the waste photosensitive film crushed in the second step with 1000kg of the bacterial agent prepared in the first step;

[0041] 4. Stacking and extraction: stack the mixture of the bacterial agent and the film in the third step in a cement tank and cover it. The stacking height is 1.5m. % range, the stacking time is 60 hours;

[0042] 5. Screening: Use a sieve to separate the film from the bacterial agent, and the separated ba...

Embodiment 3

[0045] The biological treatment method of the waste photosensitive film in this embodiment, comprises the following steps:

[0046] 1. Preparation of bacterial agent: cultivate actinomycetes and saccharomyces, weigh respectively 20% actinomycetes and 80% saccharomyces by weight and mix to prepare mixed strains; then the weight ratio of bacteria is 3:1 Add the mixed bacteria into the carrier of rice bran and fully mix to prepare the bacteria agent;

[0047] 2. Crush: Crush the waste photosensitive film into about 5×5cm;

[0048] 3. Mixing: Mix 20 kg of the waste photosensitive film crushed in the second step with 1000 kg of the bacterial agent prepared in the first step;

[0049] 4. Stacking and extraction: stack the mixture of bacteria agent and film in the third step in a cement tank and cover it. The stacking height is 1.5m. % range, the stacking time is 72 hours;

[0050]5. Screening: Use a sieve to separate the film from the bacterial agent, and the separated bacterial ...

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PUM

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Abstract

A biological processing method of waste photosensitive film includes preparing bacterial agent by mixing carrier with mixed bacterial spawn formed by actinomyces and saccharomycetes, piling up said bacterial agent with ground film and controlling temperature and humidity as well as time of piled up material, separating bacterial agent of silver content saturation state from film after pile up time is over, stewing bacterial agent to carry out gravity separation for obtaining silver and silver-free bacterial agent being able to be used as fertilizer.

Description

technical field [0001] The invention relates to a waste treatment method, in particular to a treatment method for waste photosensitive film and waste photographic paper, especially a biological treatment method for waste photosensitive film. Background technique [0002] Photosensitive material waste is listed in the "National List of Hazardous Wastes", numbered HW16 hazardous waste. This type of waste mainly includes waste fixer, waste developer, waste film, and waste photographic paper. Because waste film and waste photo paper contain rare and precious metal silver, and waste film and waste photo paper can be used as chemical and papermaking raw materials after metal silver is extracted. Therefore, waste film and waste photographic paper are recyclable waste. At present, there are two ways to obtain metallic silver in waste film and waste photographic paper, one is incineration, and the other is hydrometallurgy. [0003] When the incineration method is used to process w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03C11/24B09B3/00
Inventor 沈建中冯坤范
Owner 上海玉汇环保科技股份有限公司