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Jo Smith  - - - 
Top co-authors See all
Klaus Glenk

7 shared publications

Scottish Agricultural College, West Mains Rd, King's Buildings, Edinburgh EH9 3JG, UK

Tor-Gunnar Vågen

6 shared publications

World Agroforestry Centre (ICRAF), P.O. Box 30677-00100, Nairobi, Kenya

Bedru B. Balana

4 shared publications

Leigh Ann Winowiecki

4 shared publications

World Agroforestry Centre (ICRAF), Nairobi, Kenya

Assefa Abegaz

2 shared publications

Department of Geography and Environmental Studies, Addis Ababa University, Addis Ababa, Ethiopia

Publication Record
Distribution of Articles published per year 

Total number of journals
published in
Article 1 Read 0 Citations Are smallholder farmers willing to pay for a flexible balloon biogas digester? Evidence from a case study in Uganda Moris Kabyanga, Bedru B. Balana, Johnny Mugisha, Peter N. Wa... Published: 01 April 2018
Energy for Sustainable Development, doi: 10.1016/j.esd.2018.01.008
DOI See at publisher website
Article 1 Read 0 Citations Water for small-scale biogas digesters in Sub-Saharan Africa Vamini Bansal, Vianney Tumwesige, Jo U. Smith Published: 02 May 2016
GCB Bioenergy, doi: 10.1111/gcbb.12339
DOI See at publisher website ABS Show/hide abstract
Biogas could provide a more sustainable energy source than woodfuels for rural households in Sub-Saharan African. However, functioning of biogas digesters can be limited in areas of low water availability. The water required is approximately 50 dm3 day−1 for each cow and 10 dm3 day−1 for each pig providing manure to the digester, or 25 (±6) dm3 day−1 for each person in the household, using a digester volume of 1.3 (±0.3) m3 capita−1. Here we consider the potential of domestic water recycling, rainwater harvesting and aquaculture to supply the water needed for digestion in different countries of Sub-Saharan Africa. Domestic water recycling was found to be important in every country but was usually insufficient to meet the requirements of the digester, with households in 72% of countries needing to collect additional water. Rooftop rainwater harvesting also has an important role, iron roofs being more effective than thatched roofs at collecting water. However, even with an iron roof, the size of roof commonly found in Sub-Saharan Africa (15 m2 to 40 m2) is too small to collect sufficient water, requiring an extra area (in m2) for each person of (where R is the rainfall in mm). If there is a local market for fish, stocking a pond with tilapia, fed on plankton growing on bioslurry from the digester, could provide an important source of additional income and hold the water required by the digester. In areas where rainfall is low and seasonal, the fishpond might be stocked only in the rainy season, allowing the pond to be covered during the dry period to reduce evaporation. If evaporative losses (E in mm) exceed rainfall, an extra catchment area is needed to maintain the water level in the pond, equivalent to approximately m2 for each person in the household.This article is protected by copyright. All rights reserved.
Article 3 Reads 7 Citations Spatial and temporal dynamics of soil organic carbon in landscapes of the upper Blue Nile Basin of the Ethiopian Highlan... Assefa Abegaz, Leigh A. Winowiecki, Tor-G. Vågen, Simon Lang... Published: 01 February 2016
Agriculture, Ecosystems & Environment, doi: 10.1016/j.agee.2015.11.019
DOI See at publisher website