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Structured Approach for Comparison of Treatment Options for Nutrient-Recovery From Fecal Sludge

Mcconville, Jennifer and Kvarnstrom, Elisabeth and Nordin, Annika and Jönsson, Håkan and Niwagaba, Charles B. (2020). Structured Approach for Comparison of Treatment Options for Nutrient-Recovery From Fecal Sludge. Frontiers in Environmental Science. 8 , 36 , 1-12
[Journal article]

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Abstract

The aim of this study is to present a structured approach for comparing possible nutrient-recovery fecal sludge (FS) treatment systems in order to support transparent decision-making. The approach uses a multi-dimensional sustainability assessment of treatment technologies for nutrient recovery from FS, using a typical case of Kampala City, Uganda. A synthesized list of 22 treatment technologies was prepared from literature. This list included wastewater treatment technologies, which could be adapted to treat fecal sludge, and established fecal sludge treatment technologies that are available or potentially applicable in Kampala. Based on the local situation, the list was reduced to eight possible options, which were carried forward into a multi-dimensional sustainability assessment that incorporated input of stakeholders. The technologies included in the final assessment were optimization of the existing system, lactic acid fermentation (LAF), composting, vermicomposting, Black-Soldier Fly (BSF) composting, ammonia treatment, alkaline stabilization and solar drying. Optimization of the existing system performed well against the set criteria and is a recommended short-term solution. This will require e.g., adding narrower screens to remove more trash from the incoming sludge and respecting storage times prior to selling the sludge. To maximize the agricultural value of the recovered product, while respecting the need for safe reuse, a combination of technologies becomes relevant; the use of a combination of BSF, and subsequent ammonia or alkaline treatment of the remaining organic fraction would allow for maximized safe nutrient recovery and can be the aim for long-term sanitation planning in Kampala. The results of this process provide supporting information for a discussion of trade-offs between stakeholder groups as part of a decision-making process within a larger planning context.

Authors/Creators:Mcconville, Jennifer and Kvarnstrom, Elisabeth and Nordin, Annika and Jönsson, Håkan and Niwagaba, Charles B.
Title:Structured Approach for Comparison of Treatment Options for Nutrient-Recovery From Fecal Sludge
Year of publishing :2020
Volume:8
Article number:36
Number of Pages:12
Publisher:Frontiers
ISSN:2296-665X
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 > 2 Engineering and Technology > 207 Environmental Engineering > Other Environmental Engineering
Keywords:sanitation, resource recovery, multi-criteria, sustainability assessment, decision-support, wastewater
URN:NBN:urn:nbn:se:slu:epsilon-p-106001
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-106001
Additional ID:
Type of IDID
DOI10.3389/fenvs.2020.00036
Web of Science (WoS)000531185200001
ID Code:17173
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Energy and Technology
Deposited By: SLUpub Connector
Deposited On:02 Jul 2020 11:10
Metadata Last Modified:29 Jul 2020 06:37

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