Side by Side Comparison with Conventional Ultraviolet Treatment
A town of ~17,000 people treats its municipal wastewater and a large amount of trade waste received from multiple factories. Its treatment system consists of anaerobic, aerobic, and chemical treatment of its effluent prior to ultraviolet disinfection.
In a trial conducted at the site, NovoLabs™ Supercritical UV™ disinfection system was tested side by side with the existing ultraviolet submerged lamp system which had been supplied by one of the world’s largest ultraviolet treatment companies.
Inlet conditions prior to ultraviolet treatment were:
- UVT of 30.5%,
- TSS of 50 g/m³, and
- E. coli concentration of 3,890 MPN/100ml.
The Results
| Traditional ultraviolet disinfection system at 67 J/L | = 1,965 MPN/100ml |
| NovoLabs™ Supercritical UV™ disinfection system at 78 J/L | = 50 MPN/100ml |
| NovoLabs™ Supercritical UV™ disinfection system at 156 J/L | = below detection limit <10 MPN/100ml |
Conclusion
>2-3 log reductions better treatment were achieved in what were relatively ‘easy’ conditions for the Supercritical UV™ disinfection system, but were too challenging for the existing conventional ultraviolet disinfection system.
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