Across two municipal trials, the Supercritical UV™ disinfection system reduced E. coli in waste stabilisation pond effluent to ≤20 MPN/100mL at an ultraviolet transmittance of just 7%.
Waste stabilisation ponds are used in tens of thousands of applications globally. While they continue to offer many operational advantages, meeting increasingly demanding disinfection consent requirements is difficult. Pond effluents are variable by nature, heavily influenced by climatic conditions, and typically characterised by high solids and low UVT. Conventional UV systems struggle in these conditions.
NovoLabs™ was approached by multiple municipalities to conduct onsite trials following its proven performance in difficult low-clarity liquids.
Effluent from a town of 1,600 people treated via a waste stabilisation pond and subsequent filter bed required further disinfection. Inlet conditions averaged a UVT of 21%, TSS of 50 mg/L, and an E. coli concentration of 34,235 MPN/100mL.
The Supercritical UV™ system achieved E. coli concentrations of ≤10 MPN/100mL.
The Supercritical UV™ system was evaluated on a waste stabilisation maturation pond serving a town of approximately 5,000 people. Inlet conditions averaged a UVT of just 7.0% and TSS of 76 g/m³, with an average E. coli concentration of 11,319 MPN/100mL.
The Supercritical UV™ system consistently achieved E. coli concentrations of ≤20 MPN/100mL.
