According to the current situation of wastewater treatment in the circuit board industry and the characteristics of the circuit board wastewater itself, it provides overall solutions, including: circuit board wastewater treatment chemicals, etching solution recycling and copper recovery, wastewater detection solutions, automatic dosing and wastewater intelligent confluence control systems, etc. .
Circuit board wastewater and classification < br Circuit board production wastewater is mainly polluted by heavy metal copper ions and COD. The types of wastewater are complex, the pH varies greatly, and it is difficult to handle wastewater in compliance with standards. Circuit board factory wastewater is generally divided into the following categories:
Ordinary copper-containing wastewater: cleaning procedures and waste liquid discharge in various processes, such wastewater accounts for more than 90% of the total wastewater. Generally enter the integrated pool for coagulation sedimentation / air flotation treatment.
Ink wastewater: It comes from the inner and outer layer developing waste liquid, wet film developing solution, and film release liquid. The COD is very high, accounting for 3% -10% of the water volume. After acid precipitation, catalytic oxidation, coagulation and precipitation, it enters the integrated pool.
Complexed copper wastewater: mainly from the etching process, with complexing agents ammonia, EDTA, etc., the copper content is extremely high and has recycling value.
Electroplating wastewater: It comes from the electroplating process, contains heavy metals, and is discharged into the integrated tank for treatment after chrome and cyanide are broken.
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