Project Overview
- An Ordos New Energy Vehicle Industrial Park integrates vehicle assembly, components, and powertrain manufacturing, with a planned total investment exceeding RMB 30 billion. The park focuses on intelligent connected and new energy vehicle models, equipped with complete four-process production lines.
- The project is designed with a treatment capacity of 120 m³/d.
- The wastewater primarily originates from silane wastewater, coating wastewater, electrophoretic paint waste liquid, and workshop rinsing water, containing pollutants such as suspended solids, oils and fats, phosphates, surfactants, and heavy metals.
Key Technical Challenges
- The project involves both silane-based and phosphating-based processes, resulting in complex wastewater composition.
- Elevated concentrations of heavy metals such as zinc and nickel necessitate targeted and enhanced pretreatment processes.
- Intermittent discharge shocks must be effectively managed to ensure the long-term stable operation of advanced treatment and reclamation systems.
Process Flow
- Silane wastewater:Silane wastewater: Silane wastewater → Coagulation & Sedimentation Tank 1 → pH Reclamation Tank 1 → Mixed Wastewater Tank
- Phosphating wastewater:Phosphating wastewater → Coagulation & Sedimentation Tank 2 → pH Reclamation Tank 2 → Mixed Wastewater Tank
- Oily wastewater:Oily wastewater → Coagulation & Sedimentation Tank 3 → pH Reclamation Tank 3 → DAF Unit → Mixed Wastewater Tank
- Electrophoretic paint & coating wastewater:Electrophoretic paint wastewater & coating wastewater → Coagulation & Sedimentation Tank 4 → pH Reclamation Tank 4 → Mixed Wastewater Tank
- Other wastewater：Other wastewater → Mixed Wastewater Tank
- Combined wastewater: Combined wastewater → Mixed Wastewater Tank → Hydrolysis Acidification Tank → Biological Contact Oxidation Tank → Inclined-Tube Sedimentation Tank → Effluent Tank → Monitoring Open Channel → Compliant Discharge
