Water reuse has become more crucial than ever, as a direct result of extended droughts, catastrophic weather patterns and climate change.
For disinfection and advanced oxidation processes (AOP) with ozone, a sidestream venturi injection system with an in-line Pipeline Flash Reactor (PFR) has been widely adapted as an alternative to fine bubble diffusers due to advantages that include:
• Smaller footprint
• Higher mass transfer
• Advanced turndown capability
• Stable residual and
• Little to no bromate formation.
But today’s high-dosage ozone systems—applying doses from 7 to 30 mg/l—place extraordinary energy and mixing demands on ozone mass transfer systems.
Mazzei has risen to the challenge and developed the NEW Pipeline Flash Reactor PLUS (PFR+) that addresses the specific, real-world challenges in the transfer of ozone in state-of-the-art, SCADA-controlled systems.
Mazzei’s new, patented mixing system combines precisely engineered:
• Flow conditioning vanes
• Mass transfer mixing nozzles
• Post-injection blending grid
to create the next-generation PFR+ ozone contacting technology.
The precise combination, location, and orientation of each PFR+ element—developed and validated with computational fluid dynamics (CFD) analyses—allows water treatment systems to handle higher rates of ozone at higher turndowns and in low-velocity situations. CFD modeling also allows Mazzei to identify optimum locations for ozone monitoring sensors.
By folding, blending, and mixing without obstructing the flow, the PFR+ facilitates thorough contacting at a wide range of flow rates and velocities without creating a significant pressure drop through the system. The result is a mixing design that makes more efficient use of ozone—reducing excess ozone production along with the energy and oxygen costs associated with it—while also minimizing energy demand.
Watch this animation to see how the new Mazzei PFR+
improves mixing and efficiency in high-dose ozone systems.