High-Efficiency Rotating Biological Contactor (RBC) for Municipal and Industrial Wastewater Treatment
The Rotating Biological Contactor (RBC) is an advanced fixed-film wastewater treatment system that utilizes a series of rotating discs coated with biofilm to efficiently remove organic pollutants, nutrients, and other contaminants. Recognized for its reliability and low energy consumption, RBC technology is widely applied in both municipal and industrial wastewater treatment plants to achieve high-quality effluent standards.
The RBC process operates through a sequence of stages that leverage natural microbial activity and mechanical rotation:
Wastewater Inflow:
Pretreated wastewater enters the RBC unit and is distributed across the rotating discs, which are partially submerged in the effluent.
Biofilm Attachment and Growth:
Microorganisms (including bacteria, fungi, and protozoa) naturally colonize the surface of the discs, forming a dense biofilm. This biofilm absorbs and metabolizes organic matter and nutrients from the wastewater.
Rotation and Aeration:
As the discs rotate (typically at 1–2 rpm), the biofilm alternates between contact with the wastewater and exposure to the air. This cycle ensures:
Efficient uptake of organic pollutants during submersion.
Continuous oxygen diffusion during exposure, promoting aerobic degradation.
Pollutant Degradation:
Microorganisms in the biofilm break down organic compounds (BOD/COD) and convert ammonia nitrogen through nitrification and denitrification processes.
Biomass Sloughing:
Excess biomass periodically detaches from the discs due to rotational shear forces. This self-regulating mechanism maintains biofilm activity and prevents clogging. The dislodged biomass is separated as sludge in subsequent settling tanks.
Treated Effluent Discharge:
The clarified water, now significantly reduced in organic and nutrient content, is discharged or further polished for reuse.
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