Heavy Metal Wastewater Treatment System
Heavy Metal Wastewater Treatment System
- Treatment of high-difficulty wastewater containing copper, tin, chromium, zinc, lead, ammonia, and complex compounds
- Technical process package meeting Table 3 discharge standards for heavy metals
- Segregated collection and separate treatment, with wastewater reuse rate over 95%
Electroplating Wastewater Treatment Technology
Process Overview
The electroplating heavy metal wastewater treatment system comprises:
Oxidation precipitation reaction tank (with TN-102 dosing)
Heavy metal capture reaction tank (with TN-101 dosing)
Coagulation reaction tank (with coagulant and coagulant aid dosing)
Inclined tube sedimentation tank
Microfiltration recirculation reaction tank (with TN-103 or TN-104 COD adsorbent dosing)
MF membrane module
Composite ion exchange bed (with multiple blended chelating resins)
Online heavy metal analyzer
The treated wastewater can meet Table 3 discharge standards.
Note: TN series are specialty water treatment agents with nearly 20 years of proven project validation and consistent, reliable performance.
Key Technical Description for Achieving Table 3 Heavy Metal Discharge Standards
| Main Pollutants | Discharge Standard | Discharge Standard (Table 3) | Main Pollutants | Discharge Standard (Table 2) | Discharge Standard (Table 3) |
| Total Chromium | ≤1.0 mg/L | ≤0.5 mg/L | Total Lead | ≤0.2 mg/L | ≤0.1 mg/L |
| Hexavalent Chromium | ≤0.2 mg/L | ≤1.0 mg/L | Total Mercury | ≤0.01 mg/L | ≤0.005 mg/L |
| Total Nickel | ≤0.5 mg/L | ≤1.0 mg/L | Total Copper | ≤0.5 mg/L | ≤0.3 mg/L |
| Total Zinc | ≤0.05 mg/L | ≤0.01 mg/L | Suspended Solids | ≤50 mg/L | ≤30 mg/L |
| Total Cadmium | ≤0.3 mg/L | ≤0.1 mg/L | COD | ≤80 mg/L | ≤50 mg/L |
The TN series heavy metal wastewater treatment upgrade solution process package includes:
TN-Bretrap Pretreatment Process – heavy metal complex breaking and capture
TN-CoMF Treatment Process – microfiltration/UF membrane treatment
TN-Exchange Control Process – composite ion exchange beds
This solution is specifically designed for the upgrade and standardization of complex heavy metal wastewater containing suspended solids, organic pollutants, and complex compounds simultaneously. Its treatment performance is stable and excellent, and has successfully helped many foreign-invested, joint-venture, and state-owned enterprises in the electroplating and electroless plating sectors meet Table 3 discharge standards, with recognition from environmental protection authorities.
