Oxidation Ditch Aeration, Reinvented
The patented TITUS Twister SDF is an oxidation ditch aerator that replaces brush, disc, and rotor aerators with true directional mixing, stronger oxygen transfer, and far less maintenance.
Oxidation ditches (often called racetracks) have long relied on mechanical brush and rotor aerators that struggle to keep solids suspended, require constant upkeep, and fail to deliver dissolved oxygen throughout the full water column. The TITUS Twister SDF Aerator replaces these outdated systems with powerful, air-driven technology that improves mixing, reduces sludge buildup, and extends equipment life across the industries we serve.
Available across North America through our trusted distributor network, TITUS Twister SDF Aerators are proudly Made in the USA at our facility in Casper, Wyoming.
Racetracks have long depended on brush, disc, and other mechanical aerators. These systems throw water into the air to add oxygen, but they come at a cost. They break down often, need constant repair, and leave operators facing high service bills and long downtime whenever a unit fails.
There’s a bigger problem, too. Surface aerators only move water near the top of the racetrack. Without true directional mixing, solids sink and settle into layers that can reach more than ten feet deep. That buildup eats into capacity, drives up sludge handling costs, and drags down treatment performance.
For municipalities and industrial facilities, the outcome is the same: unreliable aeration, rising maintenance costs, and a system that can’t keep up with long-term demand.
The TITUS Twister SDF Aerator keeps the entire ditch moving with an air-driven design. A subsurface intake and a 15-degree directional discharge circulate water continuously from the bottom up. That steady circulation stops material from building up and holds dissolved oxygen at consistent levels through the full depth.
Mechanical aerators throw water into the air and only reach the surface. The SDF works differently. It delivers true directional flow that protects solids retention time (SRT) and supports biological treatment.
And because it has no moving parts or electrical components in the water, it removes the operational headaches that come with mechanical systems. The result is a safer, more durable aerator built for long-term racetrack performance.
An oxidation ditch aerator circulates and oxygenates wastewater as it moves through a racetrack-shaped treatment channel. The TITUS Twister SDF does this with air-driven directional flow instead of mechanical surface aerators. It pulls water from a subsurface intake and drives it through the full depth of the ditch, keeping solids suspended and dissolved oxygen consistent from top to bottom.
The SDF is modular, so units arrange in banks to match the shape and depth of any racetrack, whether it’s shallow or deep, wide or narrow. Each unit is weighted to sit on the bottom, letting operators place them exactly where circulation is needed most and scale the system to fit the channel.
Circulating water from the bottom up keeps solids suspended and cuts how much sludge settles in the racetrack. Less settled sludge means fewer cleanouts, less hauling, and less time managing solids. Over the life of the system, that lowers operating costs and extends the useful life of the ditch itself.
Yes. The blower system pairs with dissolved oxygen probes and automated control packages, so aeration adjusts to real-time demand. Operators can pull back energy use during low-load periods while holding optimal treatment conditions, which improves process stability and cuts power costs without constant manual adjustment.
Installation is fast. Each unit is pre-weighted to sit securely on the racetrack bottom with no tethering or anchoring, and a small crane or lift sets it in place. With no in-water electrical connections and no submerged moving parts, crews complete setup faster and more safely than with mechanical aerators.
The subsurface intake and directional discharge keep water moving below the surface, which sidesteps the freezing problems that plague surface aerators. Mixing and oxygen transfer stay reliable through winter, making the SDF a dependable choice for municipalities and industrial plants running year-round in harsh climates.
It depends on the application. The SDF is built for oxidation ditches and racetracks that need directional flow along the channel. The Twister Mixing Aerator is designed for wet wells and lift stations that need mixing and odor control. If you’re unsure which fits your system, talk to an expert.
Every Twister SDF is built in the USA at the Titus Wastewater Solutions facility in Casper, Wyoming, and distributed across North America through the company’s dealer network. Domestic manufacturing supports tighter quality control, shorter lead times, and reliable parts availability for utilities that need long-term support.
See how the SDF drops into your existing racetrack, no tethering, no in-water electrical, no infrastructure overhaul. Send us your ditch dimensions and we’ll show you what a switch looks like.