Sammanfattning

Rising demand for energy is one of the major challenges facing the world today and charcoal is a principal fuel in Kenya. Faced with energy poverty many poor households turn to briquette making. This study assessed the additional cooking fuel obtained from recycling charcoal dust into charcoal briquettes. It applied Life Cycle Assessment (LCA) to assess the global warming potential (GWP) from use of charcoal and production of briquettes from charcoal dust and cooking a traditional meal for a standard household of five people. Native vegetation of Acacia drepanolobium and a low efficiency kiln were considered the common practice, while an Acacia mearnsii plantation and a high efficiency kiln was used as an alternative scenario. Charcoal and kerosene were considered as reference fuels. Recovering charcoal dust for charcoal briquettes supplied an additional 16% cooking fuel. Wood carbonization and cooking caused the highest GWP, so there is a need for technologies to improve the efficiency at these two stages of charcoal briquettes and charcoal supply chain. Supplying energy and cooking a traditional meal in a combined system using charcoal and recovering charcoal dust for charcoal briquettes and charcoal alone accounted for 5.3-4.12 and 6.4-4.94 kg CO2 eq. per meal, respectively, assuming trees were not replanted. These amounts declined three times when the carbon dioxide from the carbonization and cooking stages was assumed to be taken up by growing biomass. This requires replanting of trees cut down for charcoal if the neutral impact of biomass energy on GWP is to be maintained. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).

Nyckelord

Climate impact; Cooking fuel; Kenya; Life cycle assessment

Publicerad i

Journal of Cleaner Production
2014, Volym: 81, sidor: 81-88
Utgivare: ELSEVIER SCI LTD

SLU författare

• Karlsson Potter, Hanna

  • Institutionen för energi och teknik, Sveriges lantbruksuniversitet
    

• Sundberg, Cecilia

  • Institutionen för energi och teknik, Sveriges lantbruksuniversitet
    

Globala målen

SDG1 Fattigdom omfattar fler dimensioner än den ekonomiska. Fattigdom innebär bl.a. även brist på frihet, makt, inflytande, hälsa, utbildning och fysisk säkerhet.
SDG7 Säkerställa tillgång till ekonomiskt överkomlig, tillförlitlig, hållbar och modern energi för alla
SDG12 Säkerställa hållbara konsumtions- och produktionsmönster
SDG13 Vidta omedelbara åtgärder för att bekämpa klimatförändringarna och dess konsekvenser


UKÄ forskningsämne

Förnyelsebar bioenergi


Publikationens identifierare

DOI: https://doi.org/10.1016/j.jclepro.2014.06.002

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/63530