Case: Trina Solar Photovoltaic Co.
Project Introduction: The project mainly includes comprehensive wastewater, spray wastewater, alkali wastewater, nitric acid wastewater, DAS process wastewater, silane combustion wastewater, and so on.
The project mainly includes comprehensive wastewater, spray wastewater, alkali wastewater, nitric acid wastewater, DAS process wastewater, silane combustion wastewater, and so on.
Industry： Photovoltaic
Project scale: 7000m³/d
Project characteristics: high ammonia nitrogen, high total nitrogen, high fluorine, and high requirements for effluent indexes.
Effluent index: COD≤70, ammonia nitrogen≤10, total nitrogen≤15, fluoride≤1.5
Main process: pretreatment + three-stage materialization + sand filtration + UF + RO + BAF + denitrification
filter + advanced oxidation
Key input concerns:
- Fluoride of effluent≤1.5ppm;
- TN≤15ppm, the first in the PV industry;
- COD ≤ 70ppm, the first in the photovoltaic industry;
- The first high-efficiency nitrogen removal in alpine and high altitude area
Reuse process design:
- membrane service life ≥ 1.5 years;
- the overall water production rate of the system ≥ 65%;
- Special silicon and hardness removal process;
Process characteristics design:
Characteristic process:
- High-efficiency denitrification tower;
- denitrification filter;
- Depth defluoridation;
- Aerated biofilter;
- Advanced catalytic oxidation.
