Pumice Odour Control Media

Pumice Odour Control Media (Lava Rock) is a granular naturally occurring product that is a suitable alternative to peat/heather, wood chips, plastic media or shells for use in biofilters, bioscrubbers and packed towers. It is used to treat odours emanating from sewage treatment works, wastewater treatment works, industrial processes and industrial effluents. It is used as the biomass support in the treatment of hydrogen sulphide, mercaptans and volatile organic compounds.

 

 

Odour and Offgas Treatment Applications:

 

 

The treatment of domestic sewage requires initial screening for the removal of heavy and large suspended solids, followed by primary settlement, biological treatment and a further settlement stage. In larger works subsequent treatment of the main flows include tertiary treatment (to further reduce the suspended solids and ammonia concentrations) and a process to enable sludges to be disposed of in a sustainable and safe manner.

 

Each of these processes can give rise to harmful odours that generally comprise hydrogen sulphide and mercaptans (sulphurous organic products). These require treatment to make them acceptable for atmospheric discharge.

 

Odour treatment processes rely on wet chemical scrubbing, dry scrubbing or biological treatment with the latter becoming the more popular and cost effective solution.

 

Pumice Odour Control Media is rapidly replacing the traditional biomass support systems of peat/heather, wood chip and mussel shells. Not actively participating in the biological process pumice is not “consumed” in the manner of the alternatives and therefore has a much longer life (typically greater than 15 years). It does not compact and retains its original low pressure drop and hence low running costs.

 

Performance is better than the older alternatives and running / whole life costs are significantly reduced.

 

Pumice Biofilter / Bioscrubber

 

Advantages include:

 

Low capital and installation costs
Low pressure drop during the life of the plant
Allows high bed depths and therefore small installation footprint
Low empty bed contact times
Good removal performance
Tolerance to variable and shock loads
Not seriously affected by extremes of temperature
Suitable for hydrogen sulphide and mercaptans alike
Equally suitable for industrial applications and VOC control

 

Physical Characteristics

 

Grades

TN

TP

TQ

TW

Applications

Biomass Support

Biomass Support

Biomass Support

Biomass support

Size – mm

10 – 15

15 – 25

20 – 30

30 – 50

Silica Content – SiO2 %

71.75

71.75

71.75

71.75

Bulk Density – kg/cu.m

700

650

650

600

Hardness – Mohs

6

6

6

6

 

 

Further Information and Technical Support

 

For further information and case studies please contact us at: odour@techfil.co.uk

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