Printing Industry
The printing industry now mostly uses electronic plate-making instead of manual plate-making, which has reduced the use of film and paper. However, as the process still uses photographic film for plate-making, it generates waste developer and fixer. Most domestic printing companies do not have wastewater treatment facilities for processing this waste, so they often rely on outside agencies or recycling facilities for disposal.
The primary harmful component in waste developer and fixer is silver thiosulfate. As silver is a precious metal, the majority of waste developer and fixer is processed using silver recovery machines. These machines utilize electrolysis to reduce the silver and refine it for reuse. However, waste developer and fixer also contain organic compounds, such as hydroquinone and acetic acid, which have a biochemical oxygen demand (BOD) of approximately 25,000 mg/L and a chemical oxygen demand (COD) of up to 84,000 mg/L. Improper discharge of untreated waste developer and fixer can still cause environmental pollution.
As a company specializing in medical waste recycling, Gshine has the technology to recover silver from waste developer and fixer for reuse, thereby reducing environmental impact.
The primary harmful component in waste developer and fixer is silver thiosulfate. As silver is a precious metal, the majority of waste developer and fixer is processed using silver recovery machines. These machines utilize electrolysis to reduce the silver and refine it for reuse. However, waste developer and fixer also contain organic compounds, such as hydroquinone and acetic acid, which have a biochemical oxygen demand (BOD) of approximately 25,000 mg/L and a chemical oxygen demand (COD) of up to 84,000 mg/L. Improper discharge of untreated waste developer and fixer can still cause environmental pollution.
As a company specializing in medical waste recycling, Gshine has the technology to recover silver from waste developer and fixer for reuse, thereby reducing environmental impact.
