Industrial Post Treatment Aeration
Municipal wastewater plants typically have to employ some method of treatment to increase dissolved oxygen prior to final discharge into receiving waters. Current or future permits require minimum dissolved oxygen levels in wastewater discharge water to be 5-7 mg/L.
Mazzei offers two solutions.
The Mazzei AirJection® Wastewater Aeration Process is ideal for introducing ambient air or concentrated oxygen into wastewater effluent basins or piping. Treated effluent is pumped from a wastewater effluent basin or directly from the wastewater effluent piping through Mazzei® Venturi injector(s) which aspirates either ambient air or concentrated oxygen without the need for blowers and compressors. The concentrated oxygen source can be LOX or a PSA type concentrator. The resulting wastewater effluent and air/oxygen mixture is then discharged back into the wastewater effluent basin or piping through Mazzei MTM™ mixing nozzles which thoroughly mix the sidestream with the main wastewater effluent flow.
Mazzei’s Pipeline Flash Reactor™ for Post-Treatment
Mazzei’s Pipeline Flash Reactor (PFR) provides a new technology for rapid oxygen transfer within a compact footprint. The system utilizes a small sidestream passed through a patented Mazzei Venturi injector to draw in ambient air or concentrated oxygen. The aerated sidestream is then delivered to the Pipeline Flash Reactor where it aggressively mixes with the main flow, uniformly transferring the oxygen in the wastewater effluent pipeline.
Where space is an issue, such as in existing built-out urban areas, the PFR eliminates the need for post-treatment cascading systems or diffuser basins required by other technologies. The PFR can also be utilized for the dissolution of oxygen gas in systems with high dissolved oxygen requirements.
Pipeline Flash Reactors are custom designed to each client’s application and performance requirements. Other benefits of the Pipeline Flash Reactor include the elimination of noise and high maintenance costs and downtime associated with blowers and bubble diffusion basins as well as the problems that cascade systems have with flooding.