Recycling Acid Effluent from Metal Processing Operations

RECYCLING ACID EFFLUENT FROM METAL PROCESSING OPERATIONS 

Generally, the AQUATECH approach to recycling involves the precipitation of the heavy metal from the waste acid. The subsequent filtration via ultrafiltration and plate and frame filtration of the slurry usually results in a clear salt filtrate suitable for feed to the AQUATECH stack. The metal hydroxide cake can be dried or recycled as is (or after a drying step) to upstream metal smelting process. 

The AQUATECH system then regenerates the salt into the acid and base. The base is used to neutralize the next batch of waste acid while the fresh regenerated acid is used for additional metal processing. 

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