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Use of volcanic ash and its impact on algae proliferation in drinking water filtration
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2013 (English)In: Journal of Water Sanitation and Hygiene for Development, ISSN 2043-9083, Vol. 3, no 2, 199-206 p.Article in journal (Refereed) Published
Abstract [en]

With increasing pollution of the available water resources, development of safe drinking water supplies is increasingly becoming a challenge, both for developing and developed countries. To alleviate the prevailing difficulties, approaches should focus on sustainable water supply and treatment systems that require minimal maintenance and operator skills. In this study, a pre-treatment of water containing algae using a combination of volcanic ash (VA) and sand in a filtration system was assessed. The results indicated that a combination of VA and sand performed better in the removal of algae than sand alone. However, it was noted that different algae genera were removed at different rates within the two types of media arrangement. In addition, there was an increase in the filtration run length of the ash-sand columns with VA on top of sand of about two and half times compared with the sand columns. It is therefore anticipated that pre-treatment of raw water laden with algae using ash-sand would probably improve on the performance of the subsequent conventional processes in removing intact cells of algae and thus reduce the threat of releasing toxins into the water that may not be removed by the subsequent conventional treatment processes.

Place, publisher, year, edition, pages
IWA Publishing, 2013. Vol. 3, no 2, 199-206 p.
Keyword [en]
Algae, Drinking water, Filtration, Intact cells, Pre-treatment, Volcanic ash
National Category
Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:kth:diva-133821DOI: 10.2166/washdev.2013.080ISI: 000331609200012Scopus ID: 2-s2.0-84882996014OAI: oai:DiVA.org:kth-133821DiVA: diva2:665315
Funder
Sida - Swedish International Development Cooperation Agency
Note

QC 20131119

Available from: 2013-11-19 Created: 2013-11-11 Last updated: 2014-03-27Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • 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
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  • asciidoc
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