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Potential Economic and Environmental Benefits of Faecal Sludge Derived Compost and Char Briquettes: The case of Dar es Salaam, Tanzania.

Thomas Mkunde, Isabela LU ; Kimwaga, Richard and Gabrielsson, Sara LU (2022) In Tanzania Journal of Science 48(2). p.383-393
Abstract
The concept of resource recovery, particularly from waste has recently gained much attention and popularity. The aim of this study was to quantify the potential economic and environmental benefits of recovering nutrients and energy from faecal sludge (FS). The empirical data were collected from three unplanned settlements of Dar es Salaam City at Keko, Kipawa and Manzese. Two scenarios were developed to recover nutrients and energy. The estimations of potential amounts of compost and char briquettes were performed by using the resource value mapping (REVAMP) tool. Results from REVAMP indicated daily economic benefits across the study areas ranging between 680 and 950 USD for energy and up to 7,000 USD for nutrients recovered, based on the... (More)
The concept of resource recovery, particularly from waste has recently gained much attention and popularity. The aim of this study was to quantify the potential economic and environmental benefits of recovering nutrients and energy from faecal sludge (FS). The empirical data were collected from three unplanned settlements of Dar es Salaam City at Keko, Kipawa and Manzese. Two scenarios were developed to recover nutrients and energy. The estimations of potential amounts of compost and char briquettes were performed by using the resource value mapping (REVAMP) tool. Results from REVAMP indicated daily economic benefits across the study areas ranging between 680 and 950 USD for energy and up to 7,000 USD for nutrients recovered, based on the faecal sludge composition. In general, FS derived compost was found more profitable than FS derived briquettes. The analyzed environmental benefits include saving the estimated to 5 hectares of forest area from being cut when substituting the use of wood charcoal with FS-derived briquettes. Since the composting process resulted to be more profitable option between the two, this study recommends the adoption and scaling up. However, guidelines and standards should be developed for proper practices. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Tanzania Journal of Science
volume
48
issue
2
pages
11 pages
publisher
University of Dar es Salaam * Faculty of Science
ISSN
0856-1761
DOI
10.4314/tjs.v48i2.13
language
English
LU publication?
yes
id
0f49a386-fb53-42ee-ad96-4ba201e4c368
date added to LUP
2022-12-07 11:02:54
date last changed
2022-12-07 13:36:33
@article{0f49a386-fb53-42ee-ad96-4ba201e4c368,
  abstract     = {{The concept of resource recovery, particularly from waste has recently gained much attention and popularity. The aim of this study was to quantify the potential economic and environmental benefits of recovering nutrients and energy from faecal sludge (FS). The empirical data were collected from three unplanned settlements of Dar es Salaam City at Keko, Kipawa and Manzese. Two scenarios were developed to recover nutrients and energy. The estimations of potential amounts of compost and char briquettes were performed by using the resource value mapping (REVAMP) tool. Results from REVAMP indicated daily economic benefits across the study areas ranging between 680 and 950 USD for energy and up to 7,000 USD for nutrients recovered, based on the faecal sludge composition. In general, FS derived compost was found more profitable than FS derived briquettes. The analyzed environmental benefits include saving the estimated to 5 hectares of forest area from being cut when substituting the use of wood charcoal with FS-derived briquettes. Since the composting process resulted to be more profitable option between the two, this study recommends the adoption and scaling up. However, guidelines and standards should be developed for proper practices.}},
  author       = {{Thomas Mkunde, Isabela and Kimwaga, Richard and Gabrielsson, Sara}},
  issn         = {{0856-1761}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{383--393}},
  publisher    = {{University of Dar es Salaam * Faculty of Science}},
  series       = {{Tanzania Journal of Science}},
  title        = {{Potential Economic and Environmental Benefits of Faecal Sludge Derived Compost and Char Briquettes: The case of Dar es Salaam, Tanzania.}},
  url          = {{http://dx.doi.org/10.4314/tjs.v48i2.13}},
  doi          = {{10.4314/tjs.v48i2.13}},
  volume       = {{48}},
  year         = {{2022}},
}