Zero-Emission Technology Route
Section 1: Wastewater Classification, Collection, and Pre-treatment

Cyanide-containing wastewater → Alkaline chlorination for cyanide destruction → pH adjustment
Chromium-containing wastewater → Reduction precipitation → Solid-liquid separation
Mixed wastewater → Coagulation sedimentation → Heavy metal capture
Section 2: Membrane-based Advanced Treatment and Concentration

Pre-treated effluent → Special UF system → Two-stage RO system
↓ ↓
Reclaimed water tank Concentrate collection tank
(Reuse rate 85%) (Concentration factor 20-30 times)
Section 3: Resource Recovery and End-of-Pipe Solidification

Concentrate → MVR evaporation crystallization → Heavy metal electrolytic recovery
↓ ↓
Distilled water reuse Metal salt products
Core Equipment Configuration
1. Special Membrane System

DTRO Disc Tube Reverse Osmosis: Tolerant to high COD and high salinity

Anti-fouling spiral-wound RO membrane: Special flow channel design to reduce scaling

Ceramic ultrafiltration membrane: Acid and alkali resistant, easy to clean, long lifespan

2. Evaporation Crystallization System

MVR Mechanical Vapor Recompression: Energy consumption is only 1/3 of traditional evaporation

Forced circulation crystallizer: Controls crystal particle size

Centrifugal separation + fluidized bed drying: Finished product packaging system

3. Electrolytic Recovery Device

High current density electrolytic cell: Metal recovery rate > 95%

Automatic stripping system: Reduces manual operation

Precious metal refining unit: 99.9% purity metal recovery

Economic Benefit Model
Direct Revenue Items

Water resource fee savings: Reclaimed water replaces fresh water

Wastewater discharge fee reduction: Reduced costs due to reduced emissions

Metal recovery value: Sales revenue from copper, nickel, chromium, etc.

Chemical savings: Reuse of acids and bases in reclaimed water

Cost Savings Items

Reduced hazardous waste treatment costs: Over 90% reduction

Fresh water procurement costs: Reduced by 80-90%

Wastewater treatment chemical costs: Reduced by over 50%

Environmental penalty risk: Basically eliminated