BioRotor® is an extremely efficient secondary biological wastewater treatment system that is also well suited for advanced wastewater treatment. It utilizes aerobic fixed film technology to reduce organic matter (BOD5), total suspended solid (TSS), ammonia and phosphorous (P). RBC systems were first introduced in Europe in the 1960’s.
A typical BioRotor® system consists of hundreds of thin circular plastic disks, collectively known as media, mounted on a horizontal shaft. Corrugated plastic with a thickness of 0.060” (1.5mm) is used to maintain high structural integrity while maximizing the biologically active surface area which promotes the growth of the many types of bacteria. Around 40% of the disk’s surface area is submerged in a tank that contains the wastewater. Continuously driven by a gear motor, the media rotates slowly at about 2 rpm.
Bacteria which is naturally present in human waste attach and multiply on the rotating media forming a thin layer of biomass
The rotation carries the biomass and a thin layer of wastewater into the air facilitating the absorption of oxygen. This aerated layer of bacteria is then re-submerged into the water where it metabolizes organic matter from the wastewater producing the required effluent quality. The RBC design provides for optimum aeration eliminating the need for complex and expensive aerators. As the film starts to grow, excess biomass is removed by shearing forces by the disks’ rotation in a process called sloughing. The rotating action of the disks also helps keep the solids in suspension.
BioRotor® is designed with multiple baffles to create a wider biodiversity. The variety of bacteria, coupled with optimum oxygen absorption, translates to a consistently high effluent quality, a shorter retention time, and low sludge generation. Thus our system requires a much smaller footprint when compared to a conventional sewage treatment system with similar capacity. BioRotor® units can be arranged in various configurations to meet the flow and organic load requirements and to provide secondary or advanced levels of treatment e.g.: Ultra violet disinfection, denitrification, filtration etc.