Silicon Powder Wastewater Treatment System
Engineering Case: Silicon Powder Wastewater Treatment System
Process Features：Air‑water combined / high‑efficiency unified treatment process
Treatment Capabilities：High‑concentration acid & alkaline wastewater 、Fluoride removal、High‑COD、High‑suspended solids、Total nitrogen treatment
Project Background
The production process is based on silicon wafers, involving surface treatment, diffusion, silicon deposition, electrode printing, soldering, etc. Wastewater mainly originates from surface etching, texturing, PSG removal, and edge P‑N junction removal.
No. | Wastewater Type | Flow Rate | Key Pollutants | After Treatment |
| 1 | High‑concentration acid wastewater (surface acid etching) | 200 (Phase I: 1/3 of total) | Fluoride: 8,000 mg/L COD: 500 mg/L TN: 2,000 mg/L SS: 2,000 mg/L | Fluoride: ≤8 mg/L TN: ≤15 mg/L SS: ≤50 mg/L |
| 2 | High‑concentration alkaline wastewater (surface alkaline etching) | 1,400 (Phase I: 1/3 of total) | COD: 1,200 mg/L SS: 2,000 mg/L | COD: ≤70 mg/L SS: ≤50 mg/L |
| 3 | Rinse wastewater | 2,400 (Phase I: 1/3 of total) | COD: 500–800 mg/L TN: 50–200 mg/L SS: 50–200 mg/L Fluoride: 200–700 mg/L | TN: ≤15 mg/L SS: ≤50 mg/L |
