Mario Alejandro HEREDIA SALGADO, PhD student in Energy Systems and Climate Change (Ecuador)

Portrait Dr Badabate DIWEDIGA

Mario Alejandro Heredia Salgado seeks to ease reliance on fossil fuels in Latin America by developing energy conversion devices able to use the residual biomass from agriculture to produce simultaneously renewable thermal energy and soil amendments through thermochemical conversion processes.


Research focus: integration of pyrolysis and combustion processes to produce soil amendments (e.g. biochar) and renewable thermal energy from agricultural waste

In Mario Alejandro’s home country of Ecuador, subsidies on fossil fuels have ensured high dependency on diesel, gasoline, fuel oil and LPG, thus negating the government’s stated aim to mitigate climate change by limiting GHG emissions. Mario Alejandro seeks to support governmental efforts to promote the implementation of renewable energy systems by developing energy conversion devices that can use the residual biomass generated in the agricultural and agro-industrial sector to produce renewable thermal energy and soil amendments through thermochemical conversion processes.

Mario Alejandro’s research project can be divided into three stages. In the first stage, he used thermo-economic methods to weigh up government subsidies to fossil fuel against tax incentives promoting alternative energy sources. From this analysis, he ascertained that in Ecuador, palm oil kernel shell (PKC) could be an environmentally friendly and cost-effective replacement fuel that could be used in the industrial and commercial sector. Mario Alejandro then went on to build a horizontal burner prototype using mainly open source hardware and software platforms and was able to demonstrate the feasibility of PKC as solid fuel for thermal energy production. In the third and final stage of his research, he designed a prototype auger reactor including a pyrolytic gas burner that integrates with the horizontal burner prototype giving way to a novel portable and continuous pyrolysis reactor. The pyrolysis reactor has been proven to make effective use of low bulk density residual biomass to produce thermal energy and biochar, without resorting to external heat sources, and complying with the European emissions standards. Mario Alejandro coordinates this collaborative project that uses participative-action research methodologies and groups research centres and universities in Portugal, Brazil and Ecuador. The project also groups non-governmental organisations, private companies and several indigenous and peasant organisations.

The jury was impressed by Mario Alejandro’s enthusiasm to put his research into practice as quickly as possible, so that agroindustrial facilities currently leaded by indigenous and peasant communities living in fragile ecosystems can get access to state of the art technology. To this end, he has endeavoured to take the scientific method out of the laboratory and into the technology sector, by founding the start-up “Andes Bioenergy”. Mario Alejandro’s device has already generated significant interest from several agro-industrial companies, meaning it could be put to large-scale use in the near future