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Biochar from cookstoves reduces greenhouse gas emissions from smallholder farms in Africa

Sundberg, Cecilia and Karltun, Erik and Gitau, James K. and Kätterer, Thomas and Kimutai, Geoffrey M. and Mahmoud, Yahia and Njenga, Mary and Nyberg, Gert and Röing De Nowina, Kristina and Roobroeck, Dries and Sieber, Petra (2020). Biochar from cookstoves reduces greenhouse gas emissions from smallholder farms in Africa. Mitigation and Adaptation Strategies for Global Change. 25 , 953-967
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Abstract

Biochar produced in cookstoves has the potential to contribute to negative carbon emissions through sequestration of biomass carbon while also providing other benefits for sustainable development, including provision of clean renewable energy and increased yields in tropical agriculture. The aim of the reported research was to estimate effects on food production, household energy access and life cycle climate impact from introduction of biochar-producing cookstoves on smallholder farms in Kenya. Participatory research on biochar production and use was undertaken with 150 Kenyan smallholder farming households. Gasifier cookstove functionality, fuel efficiency and emissions were measured, as well as biochar effects on agricultural yields after application to soil. Cookstoves provided benefits through reduced smoke, fuel wood savings and char production, but challenges were found related to labour for fuel preparation, lighting and refilling. On-farm trials with varying rates of biochar inputs, in combination with and without mineral fertilizers, have led to a sustained increase of maize yields following one-time application. The climate impact in a life cycle perspective was considerably lower for the system with cookstove production of biochar and use of biochar in agriculture than for current cooking practices. Climate benefits from biochar production and use are thus possible on smallholder farms in sub-Saharan Africa, through reduced use of biomass in cooking, reduced emissions of products of incomplete combustion and sequestration of stable biochar carbon in soils. Biochar-producing cookstoves can be implemented as a climate change mitigation method in rural sub-Saharan Africa. Successful implementation will require changes in cooking systems including fuel supply, as well as farming systems, which, in turn, requires an understanding of local socio-cultural conditions, including power relations and gender aspects.

Authors/Creators:Sundberg, Cecilia and Karltun, Erik and Gitau, James K. and Kätterer, Thomas and Kimutai, Geoffrey M. and Mahmoud, Yahia and Njenga, Mary and Nyberg, Gert and Röing De Nowina, Kristina and Roobroeck, Dries and Sieber, Petra
Title:Biochar from cookstoves reduces greenhouse gas emissions from smallholder farms in Africa
Year of publishing :2020
Volume:25
Page range:953-967
Number of Pages:15
ISSN:1381-2386
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Biochar-producing gasifier stove, Bioenergy, Greenhouse gas, Woodfuel, Life cycle assessment
URN:NBN:urn:nbn:se:slu:epsilon-p-106878
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-106878
Additional ID:
Type of IDID
DOI10.1007/s11027-020-09920-7
Web of Science (WoS)000541693200001
ID Code:17862
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Energy and Technology
(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment

(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology

(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:23 Oct 2020 17:40
Metadata Last Modified:24 Oct 2020 05:01

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