Health aspects

Although the Biovalsan project's purpose is to produce energy and biogenic CO2, its health component remains critical for validating the purification process.
The issue at stake is ensuring that biomethane and bio-CO2 produced by converting biogas remains compliant and has consistent quality over time.

What Biovalsan wishes to prove

Biogas obtained from fermentation of wastewater treatment sludge is specifically the outcome of a treatment process that involves a wide variety of inputs. Moreover, the composition of the effluents that are treated in a large-scale wastewater plant undergo frequent changes, for which the process must compensate.
Apart from the main components, such as methane (60-65%) and CO2 (35-40%), biogas may also contain variable amounts of water (H2O), nitrogen (N2), hydrogen sulphide (H2S), oxygen (O2), aromatic compounds, organic halogen compounds (chlorine and fluorine) and heavy metals, mostly in trace amounts.
The main issue for the purification method that converts biogas into biomethane is demonstrating that the biomethane obtained from biogas produced from the fermentation of wastewater sludge involves no chemical or biological health risks. This is achieved by measurements and analyses based on a test protocol approved by a committee of European biogas experts.

Project partners: SGS and Eurofins IPL Est laboratories

One of Biovalsan's main aims is to further develop knowledge of the properties and physicochemical characteristics of biomethane produced from wastewater.
Two leading laboratories with recognised expertise in the collection, sampling and analysis of chemical and microbiological data have joined the project:

  • SGS, which is in charge of physicochemical analyses to certify that biomethane and BioCO2 are compliant with the distributor's specifications and current regulations and to assess the presence of chemical health hazards.
  • Eurofins IPL Est, which is in charge of microbiological testing to assess the presence of biological health hazards.

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