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Biofiltration for Odor and VOC Removal

Biofiltration for Odor and VOC Removal. INTRODUCTION. H 2 O. BIOMASS SUPPORT MEDIA. Clean gas outlet. H 2 O. Waste gas Inlet. Humidifying Chamber. Pump. Blower. Pump. Biofilter. Drain. Conceptual Design of a Typical Biofiltration System. PROCESS ENGINEERING FUNDAMENTALS.

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Biofiltration for Odor and VOC Removal

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  1. Biofiltration for Odor and VOC Removal

  2. INTRODUCTION

  3. H2O BIOMASS SUPPORT MEDIA Clean gas outlet H2O Waste gas Inlet Humidifying Chamber Pump Blower Pump Biofilter Drain Conceptual Design of a Typical Biofiltration System

  4. PROCESS ENGINEERING FUNDAMENTALS

  5. Biofiltration Mechanisms

  6. Biofiltration Mechanisms

  7. Biofiltration Mechanisms

  8. FILTER MEDIA BIOFILM GAS PHASE Reaction Controlled Zone Reaction Controlled Borderline Situation Diffusion Controlled Zone Diffusion Controlled Reaction Free Zone Simplified Biophysical Model of Biofiltration

  9. Biodegradability of Various Contaminants in Biofilters

  10. Biodegradability of Various Contaminants in Biofilters (Continued)

  11. Typical odor characteristics and odor threshold

  12. Basic Variables involved in Biofiltration Performance

  13. BIOFILTER DESIGN

  14. Summary of Biofilter System Types

  15. Illustrative Full-scale Biofilter Performance Data

  16. Media Selection - Desirable Characteristics

  17. Media Selection - organic vs. inorganic materials

  18. Important Considerations in Deciding Waste Airflow in Biofilters

  19. OPERATIONAL PARAMETERS

  20. Acclimation

  21. Methods to maintain optimal operational factors

  22. Methods to maintain optimal operational factors (cont’d)

  23. Methods to maintain optimal operational factors (cont’d)

  24. ATTACHED GROWTH versus ARTIFICIAL IMMOBILIZATION

  25. Differences between Attached Growth Systems and Entrapment Immobilization Technology

  26. Differences between Attached Growth and Entrapment Immobilization (Cont’d)

  27. Main principles of immobilization processes • 1. Treatment of gases by attached growth systems - Self attachment of microorganisms to the filter bedding material • 2. Treatment of gases by systems that contain microorganisms entrapped within polymer beads -artificial immobilization of the microorganisms to or within the filter bedding material • microencapsulation - wrapping droplets containing microorganisms with a thin membrane; microorganisms can freely move within capsule, consuming substrates that penetrate through membrane • membrane separation - microorganisms are separated from the bulk fluid by the use of sheets of membrane, which allow substrates to penetrate. Usually porous UF membranes (0.002-0.1 m). Selective membranes also used, e.g. those separating CO2 and H2S from CH4

  28. Main principles of immobilization processes(cont’d) • microorganisms entrapment within 3D polymer matrix - pores in matrix smaller than microbial cells, keeping them trapped within the material, but the pores allow penetration of substrates • covalent bonding and covalent crosslinking - creation of covalent bonds between reactive groups on the surfaces of cells and different ligands on the bedding material. Coupling agents used to activate ligands (most common is glutaraldyde; isocynate and amino silane also frequently used).

  29. Advantages and Disadvantages of each method

  30. Advantages and Disadvantages of each method (cont’d)

  31. Comparison between natural polymers and synthetic polymers used for microbial entrapment (for wastewater treatment)

  32. Future Research Needs

  33. 스캔1

  34. 스캔2

  35. 스캔3

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