Green efficiency ensures consistent water supply

Ultrafiltration system treating ground water.
Flow rate: 2.5 MGD

In order to provide its customers with sufficient potable water, Delaware pumps water from the Olentangy River and also from groundwater wells. To treat the river water, an existing flocculation and sedimentation system provides pre-treatment to three new UF trains followed by three new NF trains.

The net capacity of the surface water treatment system is 4.5 MGD (17,034 m3/d). The groundwater source, which contains iron, manganese and hardness, requires a different treatment process that consists of greensand filtration followed by two new NF trains.

The groundwater treatment system has a capacity of 2.5 MGD (9,464 m3/d). The treated surface water and groundwater streams are ultimately blended prior to pumping to the distribution system. By providing engineered process design for each raw water source, membrane fouling is minimized, while optimizing operation and maintenance costs.

The water treatment system, designed by H2O Innovation in collaboration with AECOM Technology Corporation for the city, incorporates a real time performance and analysis system which is monitored through the System Performance Monitoring Center (SPMC). Developed in-house, H2O Innovation’s process engineers and service team are able to support the operators in their daily tasks as they learn the specification of the new UF-NF treatment system.

Nanofiltration system treating surface water. Flow rate: 4.5 MGD

Remote access

The SPMC monitoring solution also enables operators to have remote access to the HMI, to receive alarm notifications on their smart phones and, more importantly, to retrieve process recommendations such as the scheduling of the next membrane cleaning.

While clients are free to use the chemicals they want to maintain their system, H2O Innovation incorporated its complete line of speciality chemicals branded under the name Professional Water Technologies (PWT). After careful evaluation, the city has decided to go ahead and procure PWT’s specialty chemicals for membrane scale inhibition and cleaning using phosphate free antiscalant. As a result, the project has been a success for both the city and H2O Innovation.

“Through its experience in membrane system design, fabrication and commissioning, its monitoring solution SPMC and its PWT speciality chemicals, H2O Innovation shows its ability to provide safe and integrated water treatment solutions and outstanding customer care in order to secure long-term relationships,” said Frédéric Dugré, president and chief executive officer of H2O Innovation.

The design and construction phases were executed in accordance with the city’s expectations and requirements and H2O Innovation was able to secure a long-term service agreement.

“H2O Innovation delivered a system of high quality and we are really pleased with the results,” said Brad Stanton, public utilities director for the city.