the nature of the biogas, the GASWASH process separates
the biogas from its impurities (CO2, H2S, VOC, Siloxanes).
The methane content of biogas increases from 45% to 98%
and can be directly injected into the national gas distribution
advantage of our GASWASH process is that it uses reliable,
robust, widely proven technology that comes directly from
the industry. This system adapts according to the variation
of the methane richness according to the composition of
the incoming crude biogas.
Why methanize our waste ?
which is still underutilized to date, appears to be an
answer to the dual issue of waste management and the development
of renewable energies; Not to mention the fight against
greenhouse gases, of which CO2 is a part.
principle of methanization consists in recovering the
organic waste to recover it in the form of biogas by anaerobic
Organic waste can come from agricultural (slurry, manure),
industrial and tertiary (including LPN waste) or from
local authorities (catering waste, grass clippings ...).
Biogas is composed in particular of methane in variable
proportion, which gives it an energy potential.
This biogas, after purification, is used to produce electricity
and / or heat. It can also be injected into the gas distribution
network, or even used as a fuel gas.
purification of biogas requires a succession of operating
The GASWASH process has the advantage of treating all
the undesirable compounds in a single operation.
addition to biogas, agricultural methanization allows
the production of a fertilizer, the digestate, which can
be applied (As part of a spreading plan, or as a standardized
product after composting).
The development of methanation is fully in line with the
objectives of the energy transition law for green growth
promulgated on August 18, 2015.
wants to develop renewable energies up to 23% of the energy
mix by 2020, with a strong contribution from biomass to
these objectives (wood energy and methanisation).
Thus, the State sets a target of 1,500 methanizers in
3 years, and methanisation is at the heart of the plan
Energy Methanization Autonomy Nitrogen (EMAA) of 29 March
site internet http://agriculture.gouv/Plan-Energie-Methanisation).
should be noted that in this configuration, the biogas
is not purified so that it is a source of olfactory nuisance
due to H2S and NH3. On the other hand, the fermentation
CO2 is released to the atmosphere (greenhouse gases).
current biogas - biomethane sector
The uses of biomethane are the same as those of natural
gas: domestic hot water, heating, cooking, industrial
needs, etc. One of the relevant valuations still unrecognized
is the valuation of fuel.
The use of biomethane in transport fuels (known as bioGNV)
would reduce greenhouse gas emissions in this sector.
Furthermore, on the understanding that bioGNV and NGV
(natural gas for vehicles) have the same chemical composition,
gas-fueled vehicles and filling stations can be supplied
with bioGNV without technical modifications.
Diagram of the conventional pathway
purification of biogas
date, biogas purification is carried out mainly for the
upgrading of biomethane by injection into natural gas
distribution networks of fossil origin.
diagram above shows the complexity of such a purification
plant comprising several treatment units and it
will be noted that the CO 2, which is momentarily
trapped, is released to the atmosphere. Such facilities
represent a significant investment and operating
cost (eg, activated carbon costs).
Opposite a processing unit
diagram with the GASWASH process
The GASWASH process, which is innovative because
of its simple but particularly effective technology,
has a prominent place among the
current biogas purification techniques.
It is the only one known to completely eliminate
in the same operation and on a single treatment
unit CO2, N2, O2, H2O, H2S, NH3,
Organochlorines ou Organofluorines, etc....
Actualy, what is the CO2 balance
of a methanisation unit?
Each m3 of biogas from methanisation has helped
to avoid the release into the atmosphere of 2.3
kg of carbon
dioxide (CO2) responsible for global warming.
A methanisation unit of 2 MW electrical, by the
principle of methanization, thus avoids the emission
of about 9 000 t of CO2 in the atmosphere. However,
it should be borne in mind that each m3 of biogas
produced always contains between 20 and 40% CO2,
ie between 3 kg and 6 kg.
This carbon dioxide is ultimately released to the atmosphere,
either during purification in biomethane by competing
techniques or in the use of biogas without purification.
It should be noted that this same methanisation unit of
2 MW and which consumed about 4 Mm3 of biogas nevertheless
Between 800 t and 1600 t CO2 in the atmosphere depending
on the nature of the methanated substances. The composition
of the biogas and therefore its impurities varies according
to the nature.
An INERIS report (15/12/2009) mentions concentrations
of carbon oxysulphide (COS) in the range of 0.047 to 0.29
mg/m3 in biogas from the methanisation of sludge from
sewage treatment plants..
Biomethane: Towards a cost of production
finally competitive ?
The GASWASH process is the only known technology to date,
making it possible to permanently eliminate and advantageously
recover the CO2 resulting from methanation in the form
of carbonates and which is recoverable in particular in
It allows the total, sustainable and one-stop capture
of both CO2 and all volatile volatile compounds (N2, O2,
H2O, H2S, NH3, Siloxanes,
Organochlorines or Organofluorés).
GASWASH process allows a cost of production of biomethane
3 times cheaper than the competition and thus makes it
possible to reduce the cost difference between the methane
of fossil origin and the biomethane to incorporate it
in the network.
GASWASH process: a new innovative process
system for the complete purification of Biogas of any
kind in a single operation and on a single treatment unit.
recovery of biogas
Composed mainly of methane and carbon dioxide, biogas
is efficiently recovered in biomethane
by purification processes.
This technique, called methanisation, is caused
in digesters, during the treatment of household
refuse, industrial or agricultural waste and sewage
Biogas, resulting from the fermentation of this
waste, is a renewable energy source which, after
purification, can replace natural gas of fossil
Farmers, industrialists and communities thus treat
their waste while exploiting their energy and economic
potential. The GASWASH purification solution enables
the recovery of all biogas for injection into the
natural gas network, the production of vehicle fuel
(biomethane gas or liquid) or the production of
renewable hydrogen after biomethane reforming.
purification technology using the GASWASH technique
In order to transform biogas into a substitute for
natural gas, it is necessary to get rid of all the
The GASWASH process proposes a technical solution
that allows biogas producers to efficiently use
biomethane in its process of purification.
The technology used makes it possible to permanently
remove carbon dioxide (recyclable CO2), and to eliminate
in the same operation N2, O2, H2O, H2S, NH3, Siloxanes,
Organochlorines or Organofluorines.
hydrogen sector, starting from methanisation,
should logically find its place in the near future.
implementation of the GASWASH process for the purification
of biogas is possible according to this scheme according
to the current methods:
sustainable phase-out of pollutants
P.T.C. system loop
system is currently the only known system for the
long-term elimination of CO2 and which can be recycled
the industrial sector.
In a period particularly favorable to the development
of alternative energies to fossil resources, the
prospect of integrating biogas into the French energy
landscape is of political, economic and environmental
Indeed, the valorisation of domestic, industrial
and agricultural organic residues or the treatment
of wastewater satisfies the notions of sustainable
development and renewable energy, clearly explained
in the recent commitments and international agreements.
The environmental impact of the implementation of
biogas recovery schemes results in a significant
reduction in the greenhouse gases discharged.
fluctuations in the costs of importing fossil fuels
have also positively influenced the renewed economic
interest in the production of energy from biogas,
whether directly in the form of high purity methane
gas Or in the form of electricity.
cost of biomethane completely purified by the GASWASH
process is 0,054 € /kW/h. When the cost price in
competing systems is around 0.15 €/kW/h.
The GASWASH process. Allows a cost of production
of biomethane 3 times cheaper than the competition
and thus makes it possible to reduce the cost difference
between the methane of fossil origin and the biomethane
to incorporate it in the network.
On the other hand, GASWASH technology allows an
extremely simple biogas purification equipment whose
investment cost is inconsistent with the existing
The P.T.C. system is part of this new concept of purification
is looking for a partner or associate for P.T.C.
System and the DAVID and GASWASH processes
To make an offer