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Rotating biological contactor

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Anik Banik
Anik Banik

Rotating Biological Contactors (RBCs) are fixed film, aerobic biological wastewater treatment systems that use rotating discs to reduce organic matter. RBCs grow microorganisms on the discs that break down organic pollutants. The objectives of RBC wastewater treatment are to manage industrial and domestic wastewater discharge to reduce water pollution threats without harming human health or the environment. RBCs have advantages like low space and energy requirements with reliable liquid/solid separation and low sludge production.

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Rotating Biological Contactor(RBC) Presented By : Name: Anik Banik ID. No – 1606034 Reg. No -3445 Faculty Of Biotechnology And Genetic Engineering, Sylhet Agricultural University,Sylhet-3100
• RBC is a fixed film, aerobic, biological wastewater treatment system. • The primary function of these bio-reactors is the reduction organic matter. Figure : A Rotating Biological Contactor WHAT is RBC
COMPONENTS Figure : Components Of RBC
OBJECTIVES The principle objective of industrial wastewater treatment is generally to allow industrial effluents to be disposed of without danger to human health or unacceptable damage to the natural environment. To manage water discharged from homes, businesses and industries to reduce the threat of water pollution .
Pretreatment Primary Treatment Rotating Biological Contactors Secondary ClarifiersSolids Handling Disinfection RBC FLOW SCHEME 5 Influent Effluent
RBC CONTROLLING PARAMETERS 6  Organic loading and Hydraulic loading rate  Biomass  Speed  Dissolved Oxygen (DO)  Temperature
SOME FACTS ABOUT DESIGNING RBC Key considerations:  Mass transfer of oxygen and substrate to the microorganisms growing on the discs.  Overall mass of microorganisms in the system in relation to the BOD, ammonia, and nitrogen. First stage limited by oxygen transfer, organic loading must be limited. The overall RBC surface area is then dependent on the effluent results required. Determined using 2 dimensional mass transfer models More stages may be required for nitrification (ammonia to nitrate). Submerged discs are used to achieve denitrification (nitrate to nitrogen gas).
APPLICABILITY High removal of biodegradable organic pollutants Domestic black or greywater High strength industrial waste water (dairies,paper mills,food industry,textile,pulp) Sewage water
formation Low space requirement ADVANTAGES Low energy requirements Well drainable excess sludge Simple operation Minimum maintenance Reliable liquid/solids separation No risk of channelingLow sludge production
formation Limited experience and training DISADVANTAGES Sensitivity to industrial wastes Endless electricity needed Lack of flexibility Not all materials are locally available High operation cost Odour problem may occur Must be protected environmental factors
CONCLUSION  The principle objective of wastewater treatment is generally to allow human and industrial effluents to be disposed of without danger to human health or unacceptable damage to the natural environment .the RBC process is most acceptable wastewater process because of it’s benefits.
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Rotating biological contactor

  • 1. Rotating Biological Contactor(RBC) Presented By : Name: Anik Banik ID. No – 1606034 Reg. No -3445 Faculty Of Biotechnology And Genetic Engineering, Sylhet Agricultural University,Sylhet-3100
  • 2. • RBC is a fixed film, aerobic, biological wastewater treatment system. • The primary function of these bio-reactors is the reduction organic matter. Figure : A Rotating Biological Contactor WHAT is RBC
  • 4. OBJECTIVES The principle objective of industrial wastewater treatment is generally to allow industrial effluents to be disposed of without danger to human health or unacceptable damage to the natural environment. To manage water discharged from homes, businesses and industries to reduce the threat of water pollution .
  • 6. RBC CONTROLLING PARAMETERS 6  Organic loading and Hydraulic loading rate  Biomass  Speed  Dissolved Oxygen (DO)  Temperature
  • 7. SOME FACTS ABOUT DESIGNING RBC Key considerations:  Mass transfer of oxygen and substrate to the microorganisms growing on the discs.  Overall mass of microorganisms in the system in relation to the BOD, ammonia, and nitrogen. First stage limited by oxygen transfer, organic loading must be limited. The overall RBC surface area is then dependent on the effluent results required. Determined using 2 dimensional mass transfer models More stages may be required for nitrification (ammonia to nitrate). Submerged discs are used to achieve denitrification (nitrate to nitrogen gas).
  • 8. APPLICABILITY High removal of biodegradable organic pollutants Domestic black or greywater High strength industrial waste water (dairies,paper mills,food industry,textile,pulp) Sewage water
  • 9. formation Low space requirement ADVANTAGES Low energy requirements Well drainable excess sludge Simple operation Minimum maintenance Reliable liquid/solids separation No risk of channelingLow sludge production
  • 10. formation Limited experience and training DISADVANTAGES Sensitivity to industrial wastes Endless electricity needed Lack of flexibility Not all materials are locally available High operation cost Odour problem may occur Must be protected environmental factors
  • 11. CONCLUSION  The principle objective of wastewater treatment is generally to allow human and industrial effluents to be disposed of without danger to human health or unacceptable damage to the natural environment .the RBC process is most acceptable wastewater process because of it’s benefits.