ZPB Rotating Disc Aerator | biological tank aeration | fine-bubble aeration

Working Principle The Roots blower pressurizes the air and feeds it through the distribution piping into the center of the disc. The compressed air escapes through the tiny pores in the membranes on both sides to form fine bubbles, and as the disc keeps turning underwater, it spreads those bubbles evenly around it — so they cover a wider area and there are no dead zones. Small bubbles mean a big air-water contact area, so oxygen transfer is efficient and the dissolved oxygen stays right where the aerobic microbes need it. The spinning disc also mixes the water, keeps the activated sludge suspended, and stops sludge from settling on the bottom. The aerator lifts out, so when a membrane gets old or clogged you can swap it without draining the tank — aeration just keeps running. Application Fields 1.Large biological tanks: even oxygen supply in the aerobic section of big, deep tanks, with the rotating disc keeping the bottom free of dead zones. 2.Retrofit projects: upgrading old aeration systems, laying the discs out flexibly along the tank bottom for full coverage. 3.High oxygen demand: oxygen supply for treating high-load, high-concentration organic wastewater. 4.Replacing traditional aeration: an upgrade over disc- or tube-type diffusers, improving bubble distribution and oxygen transfer efficiency FAQ Q1: How is the ZPB rotating disc aerator different from regular disc- or tube-type fine-bubble aerators? A: The ZPB uses a rotating disc — air enters through the center and escapes through the membranes on both sides, and the spinning disc spreads the bubbles more evenly and covers more ground, so aeration is steadier. Unlike fixed disc- or tube-type aerators, it distributes air more evenly, and the rotation helps mix the water too, which makes it a good fit for large tanks that need uniform aeration. Q2: How is the disc aerator installed in a biological tank? A: The discs are set up in groups along the distribution piping on the tank bottom, held in place by the shaft and supports, with the number and spacing based on the tank shape and aeration demand so there are no dead zones. Air comes from the Roots blower through the piping, and multiple groups run in parallel, so you can scale the output up or down to match oxygen demand. Q3: What parameters matter most when sizing the unit? A: The main ones are disc diameter, membrane pore size (bubble diameter), air flow per disc, service area, oxygen transfer efficiency, and a blower with the right pressure and air flow. The number of discs and how densely you lay them out depend on the tank volume and oxygen demand, and it's worth keeping a backup blower on hand so the air supply stays steady.