Air cleaning

Biofilter

Biofilter

Objective

Control of residual gaseous emissions (polluted air, combustion gases, biogas, etc.) contaminated with NH3, H2S, VOCs, siloxanes, NOx, SO2, particles through systems consisting of a natural organic filling where they are adsorbed and they absorb pollutants and are biologically degraded.

Inlets

Gases with polluting compounds generated in processes of treatment/valuation of agro-industrial waste, droppings, etc. and in livestock activities (breeding sheds, storage of droppings, etc.)

Efficiency

High efficiency (>90%) in the elimination of odors, VOCs, H2S and NH3

Weaknesses

Accumulation of toxic products and/or biological process inhibitors;
It is important that there is an appropriate N/C balance, and nutrients in the biofilters to ensure the growth of microorganisms;
Clogging of the organic bed due to its degradation with consequent loss of load;

Products

Decontaminated gaseous effluents; Filling enriched with Nitrogen, or Sulphur

Other outlets

Mainly organic liquid purges; Refill sold out

Consumption

Energy: Low
Water: Low
Reagents: Low

Investment

€8000-14000/1000 m3 of slurry. Installation costs are low. The filling of the biofilters is made up of natural materials such as pine bark, organic matter compost, pine needles or biochar, among many others.

Operation

€140-200/year for a unit of 1000 m3/h. Costs mainly come from electricity to operate the primary fan and humidification pump, part-time work to check the process and the small amounts of macronutrients used

Observations

The main limitation is to have a good design of air distribution systems to avoid preferential paths and decrease in efficiency;
Production of waste water around 5 L/1000 m3;

Combination with other technologies

1. Composting-> Biofilter;
Download the file here
TRL - 9
Status Consolidated
Complexity Medium

Information made by:

BETA Tech Center