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Xylem’s Leopold OxeliaTM oxidation-enhanced biologically active filtration system for Drinking Water application

Biological and chemical contamination in drinking water poses a significant public health risk and plant operators require a treatment system that allows them to produce a safe and reliable supply of clear, good-tasting and biologically-stable finished water with the lowest concentrations of non-desired substances.

Harnessing the power of oxidation to enhance the treatment of a biologically activated carbon filter (BAC), Oxelia breaks down and removes the most difficult contaminants, including taste and odor causing geosmin and 2-MIB, and contaminants of emerging concern (CEC).   The Oxelia system comes backed by Wedeco’s expertise in ozone, UV, and Advanced Oxidation Process (AOP) treatment and Leopold’s unparalleled filtration capability.  With its many design options, the Oxelia system can be configured precisely for your water matrix, energy and regulatory requirements, for the most cost effective solution.

For optimal effectiveness and efficiency, control is key

As an integrated solution, the oxidation step and filtration step are interdependent.  The Oxelia system’s integrated analytics and feedback control provide safe, reliable and cost effective process operation that will meet the operator’s treatment goals.

Real-time for real control, real protection

• Advanced online sensor network monitors both influent, intermediate, and effluent parameters in real-time for enhanced process reliability as well as continuous treatment compliance.  You get assured protection of human health at maximum efficiency, which minimizes operating costs.
• The Oxelia system’s centralized monitoring and control system utilizes a single PLC and interface for simplicity of design and operation.
• Integrated controls allow for real-time adjustment of ozone dosage or UV dosage, responding to fluctuations in flow rate and water quality, to optimize operation and efficiency.
• Controls integrate the oxidation and filtration operations, sequencing backwash operations and controlling dosages to ensure a healthy biofilter for optimal turbidity, TOC, and oxidation and disinfection by-product removal.

Xylem’s Leopold Oxelia oxidation-enhanced biologically active filtration system is a multi-barrier solution that has several options for a custom design based on your specific needs.  Options include:

• Ozone + BAC for year round taste and odor control, as well as destruction of certain trace organics, disinfection, and removal of disinfection and oxidation byproducts.
• Ozone + hydrogen peroxide (Ozone-based AOP) + BAC for taste and odor control, disinfection, algae blooms, chemical spills, destruction of trace organics, and removal of disinfection and oxidation byproducts, including bromate control.
• UV + peroxide (UV-based AOP) + BAC is ideal for chemicals degradable by UV photolysis such as NDMA, year round disinfection and seasonal taste and odor.

The Oxelia system’s oxidation step uses ozone, ozone-based AOP or UV-based AOP to break down difficult organic carbon compounds into smaller, biodegradable components, while providing an oxygen saturated water.  In the BAC step, naturally occurring microorganisms attach to the granular activated carbon fixed bed filtration media, developing into a biologically activated carbon filter.  The microorganisms assimilate these partially oxidized organics, using the dissolved oxygen to complete the destruction of the total organic carbon (TOC).  The result?  A disinfected, biologically stabilized finished water much lower in contaminants, TOC, turbidity and suspended solids.

The Oxelia system’s oxidation step combined with filtration achieves the required disinfection credits, inactivating, oxidizing and filtering giardia and crypto, as well as viruses.  The reduction in total organics produces finished water with high biostability.  Higher biostability reduces chlorine demand in the distribution system, helping to maintain chlorine residuals while reducing disinfection byproducts such as trihalomethanes (THMs).

The process steps are matched and controlled by a dedicated set of online analyzers that feed into an integrated control system to help maximize the synergies between the process steps and optimize operations.

Expect Xylem support – from early design through startup and beyond.  Performance guaranteed!

Xylem’s support doesn’t stop at design.  As a single source provider, Xylem will be responsible for complete system delivery and startup support, ensuring that nothing gets overlooked.  With that commitment comes the Oxelia system’s performance guarantee.  The Oxelia system will produce finished water qualities that meet your requirements, and will assure your compliance – guaranteed.

With ongoing support through Xylem’s Total Care Services, Xylem’s expert local assistance can also provide preventative maintenance, and continued evaluation to ensure that the Oxelia system maintains its optimal performance, for years to come.

Guaranteed performance, guaranteed compliance, that’s Xylem’s promise