| 1. |
- Floytrup, Laura, et al.
(författare)
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Using energy justice to contextualise existing challenges of wood charcoal against faecal sludge derived briquettes as a future cooking fuel alternative in Dar Es Salaam, Tanzania
- 2022
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Ingår i: International Journal of Urban Sustainable Development. - : Informa UK Limited. - 1946-3138 .- 1946-3146. ; 14:1, s. 91-107
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Tidskriftsartikel (refereegranskat)abstract
- Over half of the population in Dar es Salaam (DSM), Tanzania, predominately relies on wood charcoal as a cooking fuel, and this is expected to rise to meet future demands. Drawing on the energy justice framework, this article contextualises the current charcoal supply chain of DSM and discusses the possibility of using faecal sludge-derived briquettes (FS briquettes) as a future alternative. This article demonstrates how current injustices in the charcoal supply chain pose challenges related to availability, reliability, affordability and sustainability and concludes that the future energy system of DSM must become more robust and diversified. This article also concludes that while FS briquettes hold the potential to become a viable and energy just cooking fuel alternative, future adoption may be hindered by limited consumer acceptability, inadequate sanitation management and lack of financial investments and government support.
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| 2. |
- Mwamlima, Petro, et al.
(författare)
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Potential use of faecal sludge derived char briquettes as an alternative cooking energy source in Dar es Salaam, Tanzania
- 2023
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Ingår i: Hygiene and Environmental Health Advances. - 2773-0492. ; 7
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Tidskriftsartikel (refereegranskat)abstract
- Coprophobia considers faecal sludge (FS) as an unpleasing raw or partially digested faecal waste with no recycling value. However, this so-called waste is claimed to have tremendous recycling values after being pyrolyzed. This study hypothesised that char briquettes made from FS might have the potential of replacing charcoal consumption in Dar es Salaam, Tanzania. Quantitative methods were used to examine the proximate, emissions and environmental benefits of faecal sludge char briquettes against wood charcoal from Dalbergia melanoxylon (locally known as Mpingo). Results revealed that FS collected during the dry season was thicker (26% total solids) than that during the rainy season (20% total solids), the difference is statistically significant with p= 6.12405E-14 at α=0.05. The dewatered and further dried FS to at least 90% total solids had an energy value of 11 - 12 MJ/kg which is less than that of uncarbonized wood (firewood) which is 19 MJ/kg. Production of FS char briquettes bonded by paper waste has a lower energy value (13 MJ/kg) than that bonded by cassava starch (14.6 MJ/kg). The average energy value of FS char briquettes is almost half that of wood charcoal (26 MJ/kg), meaning that to replace 1 kg of charcoal consumption, then 2 kg of FS char briquettes is required. Nevertheless, due to an ineffective collection of FS to be used in the production of char briquettes, only 8% of charcoal consumption in the city can be replaced. The produced briquettes are recommended to be used in open kitchens where there is plenty of oxygen circulation because they emit carbon monoxide that is higher than the allowable limits by the Tanzania Bureau of Standards.
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