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Example on the on-farm project “Bioénergie de la Brie” (French Association
for AD Farmers)
Particularity of injection from the Strasbourg WWT unit (réseau GDS,
Degrémont and Lyonnaise des Eaux)
Suppliers offers (Total Energie Gaz and GDF SUEZ)
The presentations are made in the context of increase of the French biomethane
market.
Grid operators have emphasized the following point: the number of projects is
continuously increasing, as well as distribution or transport grids.
A focus was made on the WWT biomethane injection project in the east of France :
Strasbourg.
Injection of biomethane from WWT sludge is still forbidden; this project intends to
change the perspective on this. The Strasbourg unit will serve as a good example
for elaboration of two studies, namely on sanitary and physic-chemical aspects,
which are the main reasons to refuse injection of WWT sludge biomethane into the
grid yet. This operation received subsidies from the UE program Life+
(www.biovalsan.eu).
The second main topic dealt with was the Bioénergie de la Brie unit; this is the 3rd
injection French project in France which will inject biomethane into the grid;
operation is envisaged in the second part of 2013. The responsible of the project
spokes stressed the following strategic points:
Technologic innovation (membrane)
Seasonality of bio-methane production
New rules
Gas analysis and THT odorisation
This project will process 12.000 t/y from agricultural and agro-food industries
activities. The injection capacity will be 100 Nm3/h.
Main discussions
Questions were asked in relation to the minimum size of such projects in order to
become economically viable. In other words, is there a minimum size for injection
projects?
Related to distribution grids one can say that there are basically no rules related to
the required size but assessment has to be done on a case by case base, since
constraints might be different for each project. An upgrading supplier argued that
the minimal size is around 40 Nm3/h of biomethane.
In transportation grids, an operator mentioned 100 Nm3/h as a limit, while others
argued for higher capacities like 200 to 800 Nm3/h, depending on the geographical
location of the project.
Wed. 21st of February afternoon
Opening session (GrDF)
Mobility: ADEME-GrDF agreement for 2013-2015: action plan to develop
CNG? (ADEME)
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