Aquest UV Tech was approached by a contractor to supply a UV disinfection solution to treat the MBR permeate discharged from Potsdam WWTP into the Milnerton lagoon, in Cape Town, South Africa. Because this is an ecologically sensitive water body, UV was the preferred solution specified by the consulting engineers in the tender document outlining the project requirements. The objective was to effectively disinfect and remove all pathogens in line with SANS special limit with faecal coliforms as the target microorganism for disinfection.
| Design Criteria | |
|---|---|
| UV Reactor | Trojan UV Signa 2-Row |
| Application | Waste water disinfection |
| Design Flowrate | 130 MLD |
| UV Transmission | 45 % |
| TSS | 5mg/l Max |
| Disinfection Target | Non detect/ 2 Faecal Coliform/100ml, 1 day Maximum |
| Validation | Bioassy Validated, Full Compliance with USEPA/UVDGM/ NWRI and IUVA for high level applications |
| System Overview | |
| Trojan UV Signa 2 Row | Open Channel UV Reactor, fully automated, compact and modular with low lamp count high electrical efficiency. |
| Configuration | 5 UV banks / 2 channels, one duty and one standby |
| Lamp | 1000W, LPHO Amalgam, Trojan UV Solo Lamp |
| Control Power Panel | Microprocessor based monitors, digital interface with real time system status |
| Dose Pacing | Automatic flow based program that dims lamps to conserve power under various water quality and flow conditions while maintaining disinfection dose |
| Sleeve cleaning | Automatic, on line chemical and mechanical sleeve cleaning |
| UV Sensor | UV Dose sensor monitors UV output to ensure UV Dose accuracy, lamp dimming from 100 to 30% |