Our biological combined system (BIOCOS®) is an activated sludge process maintaining a consistent water level during operation. This technology shares features of both continuous-flow and sequencing batch reactor (SBR) systems. The benefit of cycles allows for more operational flexibility under variable load and flow situations typical of municipal wastewater treatment.
BIOCOS is a cyclic activated sludge system with two aeration tanks (AIR tanks) hydraulically connected to an alternating pair of sludge recycling and settling tanks (ALT tanks). When one ALT tank has an open decanter and settling is complete, water flows to the aeration tank and pushes the clear supernatant water out of that corresponding ALT tank.
This system reduces operation and maintenance efforts because all operational phases are exclusively driven by pressurized air from the same blower system. This allows for the removal of conventional return activated sludge (RAS) pump stations and electro-mechanical equipment used for mixing and settling purposes.
To recycle the thickened bottom layer of the settled sludge blanket, we implement an air-lift to move the sludge from the the ALT tank to the selector zone of the AIR tank. Transferring the compressed sludge layer provides a 50% more mixed liquor suspended solids (MLSS) within the AIR tanks compared to the ALT tanks.
In today's economic and social climates, federal and state agencies are increasing their efforts to protect the environment and its inhabitants. In particular, they're tightening their regulations, pushing municipalities, commercial and industrial entities to engage in more sustainable practices. Proper wastewater treatment is an integral part of these efforts, and many wastewater treatment plants are upgrading their systems to match or exceed these regulatory changes.
Contact us today to get started designing a wastewater solution for your application.