Electroplating and Spraying Wastewater Treatment Equipment refers to specialized systems designed to treat wastewater generated from electroplating, metal finishing, and surface spraying/painting processes before it is discharged or reused.
This type of wastewater is often highly toxic and may contain:
Heavy metals (chromium, nickel, copper, zinc, cadmium, lead) from plating baths.
Cyanide compounds from certain electroplating solutions.
Acids and alkalis from cleaning and surface preparation.
Suspended solids (paint particles, metal dust, sludge).
Organic solvents and resins from spraying or painting processes.
High chemical oxygen demand (COD) and total dissolved solids (TDS).
Typical electroplating and spraying wastewater treatment equipment includes:
1. Equalization and pH adjustment tanks – to stabilize flow and neutralize acidic/alkaline wastewater.
2. Chemical precipitation and coagulation-flocculation units – to remove dissolved metals and suspended solids.
3. Oxidation systems – such as sodium hypochlorite or hydrogen peroxide dosing to destroy cyanide and oxidize other contaminants.
4. Solid-liquid separation systems – sedimentation tanks, dissolved air flotation (DAF), filter presses for sludge removal.
5. Advanced treatment units – ion exchange, ultrafiltration (UF), nanofiltration (NF), or reverse osmosis (RO) for high-purity water recovery.
6. Sludge treatment systems – to dewater and safely dispose of metal-rich sludge.
The main objectives are to remove toxic substances, recover valuable metals, comply with strict environmental discharge standards, and enable water recycling in industrial processes.
