Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Evaluation of organic residues and their mixtures with Peepoos to produce fertilizer.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Peepoo, self-sanitising, biodegradable toilet is characterized by low carbon to nitrogen (C-N) ratio and low dry matter (DM) content. Principal nutrients (nitrogen (N), phosphorous (P) and potassium (K)) are also not in a balance as required by most crops. It was expected that the mixing of used Peepoos with other organic materials might balance its chemical characteristics. In this thesis, availability and suitability of common organic materials produced in Kenya has been investigated for mixing with used Peepoo bags to obtain a balanced fertilizer product from the crop nutrition aspect. Seven organic residues were selected from the list of 13 on the basis of their availability near the processing site in Nairobi. The selected residues were then chemically analyzed for their individual plant nutrient content. The analysis results were used subsequently to simulate the chemical composition of a wide range of Peepoo-Residue mixtures. The evaluation of the theoretical mixtures based on DM content, C-N ratio and NPK ratio showed that the majority of investigated mixtures had DM content below 60 %. Majority of the mixtures showed C-N ratio between 10-1:1. All the mixtures deviated from the common nutrient uptake ratio of crops (1:0.5:1.4). Composite mixtures with more than 2 ingredients resulted in a balanced fertilizer product. The study concludes and recommends that the composite mixtures with more than two ingredients should be considered for practical processing of Peepoos into a commercial fertilizer product.

Place, publisher, year, edition, pages
2014.
Series
TRITA-LWR Degree Project, ISSN 1651-064X ; 2014:04
Keyword [en]
C-N ratio; Dry matter, Organic residues; pH; Peepoos; Sanitation
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-171790OAI: oai:DiVA.org:kth-171790DiVA: diva2:844517
Educational program
Degree of Master - Environmental Engineering and Sustainable Infrastructure
Examiners
Available from: 2015-08-11 Created: 2015-08-06 Last updated: 2015-08-11Bibliographically approved

Open Access in DiVA

fulltext(3469 kB)390 downloads
File information
File name FULLTEXT01.pdfFile size 3469 kBChecksum SHA-512
9564b800e3b681a352ee6c5cdadb51d6e739c1e5c28abca8ca74bb561d98e5858219cd86b273f781256dc9e893a9753104825df191449a0e489cfb9526824314
Type fulltextMimetype application/pdf

By organisation
Land and Water Resources Engineering
Civil Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 390 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 208 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf