Untitled - avniR
Untitled - avniR
Untitled - avniR
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Congrès International sur l’Analyse du Cycle de Vie Lille, Novembre 2011<br />
MJ / MJ of fuel. The value of fuel consumption is the same than for pure vegetable oils used as fuel.<br />
Consumption of renewable energy is better than for MEWCO. The tendency is the same regarding to<br />
photochemical oxidation potential (3,5.10-5 kg eq. C2H4/MJ of fuel) and human toxicity (1,9.10-3 kg eq.<br />
DCB / MJ fuel). Concerning eutrophication potential, the value is similar to MEWCO (7,9.10-5 kg eq.<br />
PO43-/MJ of fuel). Only for greenhouse gas emissions WCO are slightly more high (1,55.10-2 CO2eq/MJ<br />
of fuel). All these results can be improved. Indeed, such factors as the type of treatment plant used for<br />
wastewater, allocations corresponding to the proportion of collected oil actually used for production and<br />
more accurate engine tests results. In addition, some mechanical parameters have not been considered in<br />
this study. For example, the use of oil in the engine without transformation is quite easy for earlier diesel<br />
engines but more difficult on common rail engines and sometimes some modification on engines. In<br />
addition, it would be necessary to assess the potential impact of these changes on the engine lifespan.<br />
3) Biological WCO process treatment<br />
Gecco, ProBioGEM and PC2A are collaborating on the development of an innovative treatment<br />
process to convert waste into biofuel. This process presents environmental constraints and a LCA is made<br />
to reach these constraints. Many data are currently lacking to describe fully and consistently this process in<br />
a LCA. A first approach by introducing a product A in the previous LCA for the direct use of the WCO<br />
shows that the renewable energy consumption would be multiplied by four and the value of other<br />
parameters would be multiplied by two or three.<br />
The LCA will allow I evaluating the impact of substances used in the process and operating<br />
conditions and therefore will be used as a tool for developing the process to obtain the best compromise<br />
between biofuel performance and environmental impact.<br />
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