DISINFECTION & AOP WITH OZONE FOR WATER REUSE
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.