[     Business case listing ](/en/case-studies "  Business case listing")



 

 

 

### The Client

**In January 2008, Webel SL Energy Systems Ltd awarded Veolia Water Solutions & Technlogies (Veolia) for two projects in India where it operates a Solar Cell Factory.**  
  
**Webel-SL Energy Systems Ltd i**s a manufacturer of solar photovoltaic cells and modules, using mono-crystalline silicon wafers, for standalone and gridconnected projects.

The solar cells are being produced at the Company's integrated production facility in Kolkata, India with automated processes and a captive technology.  
Webel-SL Energy Systems Ltd is one of the fastest growing companies within the photovoltaic industry in India with a 30% annual growth rate and a 10 MW manufacturing facility for cells and modules



 

 

 



###   
The Client’s Needs

Veolia has been chosen to supply a deionization water treatment system and a Wastewater Treatment plant with a capacity of 10m3/hr Acid Waste Neutralization, 10m3/hr HFWT and Sludge dewatering.

### Veolia Solution

Veolia offered **custom-made water treatment solution** to enhance the cost effectiveness of the plant and ensure the high quality of the treatment:

- Unique pretreatment to protect RO: **Ion exchange pretreatment followed by CEDI**
- Off-site resin regeneration
- Use of Veolia standard equipment (**MMF, ACF, CEDI**)
- Neutralization (32m3/hr) & slurry treatment (16m3/hr)



 

 

 



 

 

### *Key Benefits*

- ***Higher DI water quality** for solar cells manufacturing through pre-treatment system. make-up system . polishing system*
- *The wastewater treatment plant is designed to **treat various wastewater streams** discharged from the Solar Cell Productions, so as the discharge the wastewater into Public Sewer*
- *Achieved balanced concentration of waste and **optimization of the treatment process***