SELPAXT FAQ

SELPAXT FAQ

1. What is SELPAXT?
   SELPAXT is a water treatment technology developed by Chromafora AB for removing PFAS from contaminated water using the SAMF technique.
   
   
2. How does SELPAXT remove PFAS?
   It uses a combination of water-soluble active chemicals and ultrafiltration membranes to selectively retain and remove PFAS.
   
   
3. What types of PFAS can SELPAXT remove?
   SELPAXT is effective for both short-chain and long-chain PFAS.
   
   
4. What is SAMF?
   SAMF stands for Surfactant-Ligand Assisted Membrane Filtration, the technique on which SELPAXT is based.
   
   
5. What makes SELPAXT different from traditional PFAS removal methods?
   Unlike traditional adsorption methods, SELPAXT does not rely on surface adsorption and uses a continuous supply of fresh chemicals, ensuring consistent efficacy.
   
   
6. What is the removal efficiency of SELPAXT?
   SELPAXT can achieve removal rates between 80% and 99% for most PFAS species. Typically more than 90% for both long and short PFAS chains.
   
   
7. Can SELPAXT handle co-contaminants?
   Yes, SELPAXT has low sensitivity to organic matter and salts, making it robust against various co-contaminants.
   
   
8. What are the key benefits of using SELPAXT?
   High PFAS removal performance – especially for short PFAS, automatic regeneration, low energy consumption, reduced waste volume, and adaptability to different water matrices.
   
   
9. Is SELPAXT scalable?
   Yes, it can be scaled to fit various capacities and can be configured for multi-stage treatment setups.
   
   
10. What types of water streams are suitable for SELPAXT?
    Landfill leachates, airport-influenced groundwater, industrial process water, and NF/RO concentrates.
    
    
11. What is the process for implementing SELPAXT?
    The process starts with lab-scale tests, followed by on-site demonstrations, and finally full-scale implementation.
    
    
12. What kind of pre-treatment does SELPAXT require?
    Basic pre-treatment for suspended solids and, if necessary, aeration to adjust the redox potential.
    
    
13. How is the waste managed in SELPAXT?
    The PFAS concentrate is collected in a dedicated tank and can be removed for off-site disposal.
    
    
14. What is the expected lifespan of the SELPAXT membranes?
    The membranes have a life expectancy of one to three years, depending on water quality.
    
    
15. How is the SELPAXT system monitored?
    Chromafora provides continuous monitoring and performance assessments, including regular water quality reports.
    
    
16. Can SELPAXT be integrated with existing systems?
    Yes, SELPAXT can integrate with existing water treatment systems or function as a standalone unit.
    
    
17. What is the typical footprint of a SELPAXT unit?
    The standard C10 unit, including support components, has a footprint of approximately 20 by 20 meters.
    
    
18. How does SELPAXT handle system regeneration?
    The system performs automatic regeneration by ejecting PFAS concentrate and conducting a clean-in-place procedure.
    
    
19. What are the chemical requirements for SELPAXT?
    SELPAXT uses proprietary chemicals developed and supplied by Chromafora, with regular bulk deliveries based on storage capacity.
    
    
20. Who can benefit from SELPAXT technology?
    Industries and municipalities dealing with PFAS-contaminated water, including landfills, airports, and industrial sites.