Sewage Handling & Pressure Filtration Equipment (02) 8705 0205

 

GBF Biofiltration - Odour Control for Sewage Treatment and Pump Stations

Overview

 

GBF Biofiltration two-stage odour control system

The GBF Biofiltration two-stage odour control system extracts foul air for preconditioning in the biotrickling filter stage followed by further biological oxidation through the biofilter media bed prior to atmospheric discharge. This is used widely in sewage pump stations for Sewage Treatment odour control.

 

In the biotrickling filter (BTF) stage, designed in a forced-draft, up flow configuration, the air passes through a synthetic media during which two preconditioning steps occur. First, the airstream is humidified, which is required for the biofilter stage. Second, the BTF provides a high level of Hydrogen Sulfide (H2S) degradation. The highly porous media provides an immobilised matrix, supporting a large microbial population, which forms a biofilm layer. As air comes in contact with this layer, H2S is solubilised and subsequently bio-oxidised by the microbes. The media and biofilm is kept adequately moistened by way of continuously re-circulated water. The bio-oxidation of H2S results in sulphate ion; thus the BTF operates under acidic conditions.

 

Once the air enters the biofilter, the remaining odourous compounds are solubilised into the moisture layer surrounding the individual media particles or are adsorbed directly to their surface. Bacteria present within this moisture film utilise the compounds as substrate. The compounds are biologically oxidised to CO2, H2O and inorganic salts and clean air is discharged to atmosphere. It is critical that the biofilter creates an optimal environment to enhance microbial development. Maintaining proper air temperature, pH, moisture and nutrient levels are essential for favourable biofilter performance and removal efficiency.

 

The advantage of pre-treating high levels of H2S separately in acidic conditions is that it isolates and maximises the degrading efficiency of acidophilic bacteria. This will allow the biofilter stage to operate at a neutral pH, increasing the buffering longevity of the media. It will also reduce the Empty Bed Residence Time (EBRT) required in the biofilter stage for total odour treatment.

Corrosion

Advantages

 

Engineered

  • All Tanks have been individually engineered to handle the toughest environmental situations.
  • Proven in the toughest environments.

Reduce OH&S Risks and Cost

  • Minimum installation time reduces labour costs and reduces OH&S issues on site.

Light Weight

  • The relatively light weight simplifies handling and reduces costs in transport, handling and installation.
  • No heavy cranes and assembly of heavy concrete sections in the ground; saving considerable costs.
  • Even though GEBEL FRP Vessels are relatively light weight, pound for pound they are stronger then their competitors materials.
  • Due to their light weight, ease of onsite installation and access again reduces labour cost and down time is reduced.

Corrosion

  • The problem of corrosion due to sewer gases in concrete systems is entirely eliminated giving long life with minimum maintenance.
  • GEBEL Vessels are manufactured in high grade chemical resistant isophthalic resins and are built to Australian and British Standards.
  • Sewer gases in concrete wells is eliminated by using GEBEL’s FRP Pump station which are corrosion resistant.
  • Prevention of concrete spalling (cancer.)

Cleanliness

  • Being built in one piece, they have a seamless, smooth, clean internal surface that resists scum and sludge build up and allows no leakage to the external environment.

 

XLD Media

XLD High Performance Engineered Biofiltration Media

 

The GBF Biofiltration Odour control systems use XLD a high performance engineered biofiltration media specifically designed for biosolids applications where the removal of high odour, low H2S and reduced sulphur compounds are critical. Total odour removal efficiencies of up to 99%can be achieved in 30 seconds and greater than 95% in 20 seconds or less, allowing XLD to achieve higher total odour removal in less then half the time of conventional inorganic biofiltration medias. XLD’s short retention times and lightweight design allows for small footprints and unique bed configurations to meet specific site requirements.
 

 

FEATURES

BENEFITS

Engineered

XLD is an engineered media manufactured to exacting specifications; this ensures predictability and consistent removal efficiency.

High Performance

99% removal of biosolids and other sewage plant odours in 30 seconds. Achieves removal of most reduced sulphur compounds to below detection limits.

Lightweight

Permits design of unique bed configurations to meet specific site requirements.

Small Footprint

Lower EBRT’s reduces overall footprint.

Reduce Capital Cost

Overall installed cost can be reduced by up to 25% over conventional biofilters with inorganic media.

Warranty

XLD is warranted for 10 years.

LWE Media

LWE High Performance Engineered Biofiltration Media

 

LWE is an engineered synthetic media specifically designed for Biorem’s biotrickling filters. It is an extremely lightweight, rigid material that allows for increased bed depth within the vessel.


The rigidity of the media eliminates compaction, which prevents damage during shipping and loading.


Random particle size allows for complete surface area coverage, thus eliminating air channelling through the vessel.


High available surface area creates greater amount of biomass growth for higher removal efficiency.


H2S removal efficiencies of greater than 99%.


Will not degrade due to acid, solvent, or biological attack.


Low shipping and handling costs due to the low density of the media.


Reduces the problems associated with peaks and diurnal variations, through accelerated response.


 

 

 

 

 

 

 

 

 

 

 

FEATURES

BENEFITS

Minimal Compaction/

Consolidation

The inert mineral structure provides rigid support to minimise compaction.

The result is low frictional resistance to airflow.

Acid Resistance/Low

Chemical Reactivity

Able to support low pH micro-organisms in harsh low pH environments.

Small Footprint

Due to excellent mechanical properties it can be packed taller and hence has a

smaller footprint.

System stability

Due to excellent mechanical and chemical properties it can provide good system

stability and long work life.

Ability to support

bacterial growth

The available surface area and other media properties allow for the growth and

propogation of microbial colonies.

Optimum water

retention capability

The media holds an optimum amount of water to support the microbial colonies

for biological treatment of waste gas streams.

Non-biodegradable

The media is not biodegradable and has a life expectancy of at least 10 years.

Even water

distribution

The uniform and homogenous nature of this manufactured media ensures even

water distribution and superior predictable performance.

Fluidity

The fluid nature of this media allows for easy installation and assumes the shape

of the container. This property minimizes un-wanted voids and allows for uniform

media distribution throughout the vessel.

 

 

 

 

System Overview

GBF Odour Control Systems Overview

 

 

 

Standard Systems

GBF Odour Control Systems Sizing

Model

Treatment Flow

 (m)

B (m)

C (m)

D (m)

GBF250

250

4.8

3

3.5

1.5

GBF500

500

5.8

3

4

1.85

GBF750

750

6.4

3

4.2

2.2

GBF1000

1000

6.9

3

4.5

2.47

GBF1250

 

1250

6.9

3.5

5

3

GBF1500

1500

7.5

3.5

5

3

GBF2000

2000

7.7

4

5.5

3.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The systems are Design @ XLD 30sec EBCT and LWE @ 20sec EBCT

 

Recent Projects

 

Projects

GBF 2000 System

Installed at Mudgee Sewage Treatment Plant

The Dual Stage Odour Control System extracts foul air for subsequent preconditioning in the Biotrickling stage and then complete biological oxidation through the Biofilter media bed prior to atmospheric discharge.

In the Biotrickling stage, the air passes through a synthetic media during which two preconditioning steps are achieved. The first being the humidification of the air stream; required for the Biofilter stage of the process. Secondly, the Biotrickling filter will provide a high level of Hydrogen Sulphide (H2S) degradation. The benefits of pre-treating high levels of H2S separately in acidic conditions is that it isolates and maximises the degrading efficiency of acidophilic bacteria.

In the Biofilter stage, air enters the Biofilter and the remaining odorous compounds are solubilised into the moisture layer surrounding the individual media particles or are adsorbed directly to their surface. Bacteria present within this moisture film utilise the compounds as substrate. The compounds are biologically oxidised to CO2, H2O and inorganic salts and clean air is discharged to atmosphere.

Process Parameter 

Value

Unit

Air Flow Rate

2300

m3/hr

Inlet Air Temperature

10-40

°C

Type of Contaminant

Influent Concentration (ppm)

Removal (%)

Average H2S Concentration

50

99

 
 

 

GBF 500 System

Installed at Muswellbrook PS04 Sewage Pump Station

The Dual Stage Odour Control System extracts foul air for subsequent preconditioning in the Biotrickling stage and then complete biological oxidation through the Biofilter media bed prior to atmospheric discharge.

 

 

 

Process Parameter 

Value

Unit

Air Flow Rate

450

m3/hr

Inlet Air Temperature

10-40

°C

Type of Contaminant

Influent Concentration (ppm)

Removal (%)

Average H2S Concentration

50

99