Maximum UVT recorded was 0.3%
A meat plant currently utilises chemically-assisted dissolved air flotation to remove suspended solids from their wastewater before discharging into the council trade waste scheme. A new trade waste bylaw in the region requires that the facility reduce their enterococci concentration to below 800 MPN/100mL. As such, the meat works began investigating treatment upgrades and NovoLabs™ was commissioned to demonstrate its Supercritical UV™ (SCUV) disinfection technology.
Typical of meat works effluent, the UV transmittance (UVT) was extremely low. Even with chemical pre-treatment, the maximum UVT recorded during the 2-week test period was only 0.3%, massively below what is normally considered feasible for conventional submerged lamp UV systems.
Figure 1: Enterococci removal using NovoLabs™ SCUV technology running after DAF treatment system when the solids concentration was maintained at levels required by the consent.
A positive result
Figure 1 shows the effectiveness of SCUV disinfection when the solids concentration was maintained at levels required by the consent. NovoLabs™ SCUV technology reduced the enterococci concentration to well below the required 800 MPN/100mL.
Aside from the system’s exceptional performance in very low UVT’s, important other stand-out operational and safety features discussed with the company included: parallel processing; auto lamp-outage detection and module changeover; and the ‘no drip, no mess’ slide out modules with flip-up lids for easy and safe operator access.
As a result, the customer made the decision to procure a NovoLabs™ containerised SCUV system as an adjunct to their total treatment plant upgrade.
Novolabs™ Supercritical UV™ Disinfection — UV Treatment for Low Clarity Liquids