The Metropolitan Water Reclamation District of Greater Chicago (MWRD) – of which the Terrence J. O’Brien Water Reclamation Plant (WRP) is part of – has made a number of upgrades to its treatment process in recent years. The addition of UV disinfection has been a critical part of these upgrades; it played a key role in improving water quality throughout the Chicago Area Waterway System (CAWS).
The Terrence J. O’Brien WRP (originally called North Side) was built to serve residents in communities north of downtown Chicago. In operation since 1928, it originally treated sewage for a population of 800,000 within a 78-square-mile area, but now both the service area and the population are nearly twice as large. The plant now serves over 1.3 million people in an area of 143 square miles and treats an average of 230 MGD of wastewater.
A Need For Innovation
The need for change was recognized by the MWRD Board of Commissioners in 2011 when new regulations required the facility to add a disinfection process to their wastewater treatment system. With the goal of re-classifying the CAWS to allow primary contact, they set out to research the most economical and optimal disinfection technology for the facility.
After investigating various disinfection approaches and technologies, officials determined that UV was the optimal solution for the plant and application.
Read the entire case study by clicker here.
Delaware County selected TrojanUV Disinfection at their Olentangy treatment facility, and in April, the installation and start-up took place.
To learn more about these products, contact your HPT sales representative!
TrojanUVSigna Pilot Trailer at WEFTEC
The above TrojanUVSigna pilot trailer was a popular attraction at this year’s WEFTEC in New Orleans. Several people went through it and saw just how easy conversion to UV can be. If you’re interested in bringing the pilot trailer to your plant, click here to sign up or contact your local HPT salesperson.
The City of Newark started up their new 30 mgd High Rate Treatment (HRT) facility in 2011. Wet weather flow is diverted to the HRT when plant capacity is exceeded. Effluent criteria is a minimum 80% removal of TSS and 126/100 ml E. Coli.
The entire 30mgd facility fits on a 65 ft x 195 ft footprint.
Major items of the process include:
1. Pumps – Five Flygt pumps, each 6000 gpm at 30 ft
2. Screens – Two Parkson AquaGuard™ Screens, 6mm, each 15 mgd
3. Grit Removal – Two Eutek Headcells™ by Hydro International, each 15 mgd, 12 ft dia, 904 sq ft surface area(each), 95% removal greater than 150 mesh
4. HRT – two 15 mgd Actiflo™ units by Kruger, 60gpm/sf
5. UV Disinfection – One Trojan Trojan UV4000Plus, 28 mgd
Trojan Technologies introduces to the marketplace the first-ever drinking water UV systems validated to fully comply with Federal regulations for delivering 4-log inactivation of viruses, including the highly resistant adenovirus. In addition, Trojan now offers two new system sizes – the TrojanUVSwift™SC D03 and D18. The new validations and product line expansion will enable an even broader range of drinking water treatment plants to benefit from validated TrojanUV disinfection solutions.