The document presents information on biofiltration, a pollution control technique that uses a bioreactor containing living material to biologically degrade pollutants. Some examples of biofiltration systems given are bio scrubbers, vermifilters, trickling filters, slow sand filters, treatment ponds, green belts, and green walls. Mechanisms, components, and factors that influence biofiltration systems such as filter media, empty bed contact time, backwashing, temperature, biofilms, nutrients, pH, microorganisms, oxygen levels, and moisture content are discussed. Installation costs for biofiltration are low but operating costs depend on pretreatment needs and consist primarily of electricity and nutrients. Potential drawbacks include large

1. A PRESENTATION ON
PRESENTED BY
SHEETAL G. PATIL.
(ROLL.NO.20160482)

2. •Bio filtration is a pollution control technique using a bioreactor
containing living material to capture and biologically degrade pollutants.
•Biofiltration is a relatively emerging new technology, applied to
wastewater treatment and other toxic compounds.
•Examples of bio filtration include
bio scrubbers, Vermifilters
trickling filters
Slow sand filters
Treatment ponds
Green belts
Green walls

3. Figure.2.1-- Process of Biofiltration of contaminated air (V. Kumar
et al.2013)

4. Figure.2.2- trickling filter system for treating wastewater. (V. Kumar et
al.2013)

5.  Mechanism Of Biofiltration
 Role Of Micro-organisms In Biofiltration Technique

6.  Filter Media
 Empty Bed Contact Time (EBCT)
 Filter Backwash
 Temperature

7. How do biofilter work?
Figure-3.1 Schematic diagram of a biofilter unit(
P.Kumar et. al 2011)

8. •Biofilm
• Biofilter bed
• Nutrients
• PH

9. •Microorganisms
•Oxygen levels
•Moisture Content

10. •Bio trickling Filter
Figure 4.1. Bio trickling Filter(CATC, EPA,
2003)

11. Bio scrubber
Figure 4.2. Bio scrubber(CATC, EPA,
2003)

12. • Installation costs are low. Most biofilters are constructed from common
materials locally available such as lumber, fiberglass, and plastic pipe.
• Depending on the amount of pretreatment the emissions require,
operating costs are usually low. These costs consist of electricity to
operate the primary blower and the humidification pump, part-time labor to
check on the process, and small quantities of macronutrients.

13. • Large land requirement for traditional design.
• No continuous internal liquid flow in which to adjust bed pH or to
add nutrients.
•.Bed replacement can take 2 to 6 weeks, depending on bed size.
• Natural bed media used in biofilters must be replaced every 2 to 5
years.