Date: 2022-07-13
Project Overview
- Project Name: Project No. PW1220723645
- Location: Vietnam
- System Process: MMF + ACF + ASS + UF + 2RO + EDI
- Production Capacity: 60 m³/h
- Water Quality Standard: Ultrapure water (EDI polishing)
Client Profile
The end client is a leading global photovoltaic manufacturer, one of the top names in solar cell and module production, with an overseas manufacturing base in Southeast Asia. Ultrapure water is essential to cell and wafer processing, where water purity directly affects conversion efficiency and product yield.
In accordance with the client’s confidentiality requirements, the customer name is withheld in this case study and the project is referenced by its contract number.
Technical Note: Process Terms
For your reference, here is a breakdown of the technical process mentioned:
- MMF: Multi-Media Filter — removes suspended solids and turbidity from feed water through layered filtration media (anthracite, sand and garnet).
- ACF: Activated Carbon Filter — removes residual chlorine, organic matter, color and odor to protect downstream membranes and ion-exchange resins.
- ASS: Automatic Softening System — an automated ion-exchange softener that removes hardness from feed water to protect downstream membranes.
- UF: Ultrafiltration — a membrane filtration stage that removes colloids, bacteria, viruses and fine particles, delivering stable, low-SDI feed water for reverse osmosis.
- 2RO: Two-stage Reverse Osmosis — two RO passes in series, producing water of significantly higher purity and lower conductivity.
- EDI: Electrodeionization — a continuous, chemical-free polishing process that combines ion exchange with electrical regeneration to produce high-resistivity water.
Project Location: Vietnam | System process: MMF + ACF + ASS + UF + 2RO + EDI | Date: 2022-07-13
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