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Self-Sufficient Wastewater Reuse with Intermediate Dehydration and with Consideration of Product Recovery.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630).
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Municipal wastewater treatment has a long history of local handling with recovery of toilet wastes for use in agriculture and to some extent energy recovery from biogas by use of local handling. This may be seen as ―the first way‖ further developed by septic tanks and infiltration and recovery as in Ecological Sanitation and use of urine separation toilets. However, problems related to water borne diseases and odor problems successively gave rise to ―the second way‖ with central wastewater systems with large investments in water and sewer nets and increasingly better technologies for water treatment and wastewater treatment. This technology may treat municipal wastewater to a drinking water quality and recover part of energy and nutrients contents for eco-cycling. The problems noted and which are quite obvious are affordability in poor countries and the need for much energy supply and with negative effects of emission of greenhouse gases.

Ways should be better evaluated to obtain both an effluent wastewater of drinking water quality and at the same time be self-sufficient with energy, obtain products with a commercial value and comply with methods to reduce the amounts of released greenhouse gases. It is suggested that an intermediate dehydration step should be used by dividing the main stream into two streams, one to which water has been transferred by methods as forward osmosis or freezing and one remaining concentrated stream that could be treated more efficiently. New technologies should be considered for electricity production as use of fuel cell technology and forward osmosis. Methods to diminish greenhouse gas emissions include avoidance of such redox potentials and process conditions that lead to greenhouse gas emissions and binding of carbon dioxide in algae and plants and in clatharates.

Place, publisher, year, edition, pages
2013.
Series
TRITA-LWR Degree Project, ISSN 1651-064X ; 2013:02
Keyword [en]
Dehydration, Electricity, Energy, Forward Osmosis, Freezing, Wastewater reuse
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-171848OAI: oai:DiVA.org:kth-171848DiVA: diva2:844701
Educational program
Degree of Master - Environmental Engineering and Sustainable Infrastructure
Examiners
Available from: 2015-09-21 Created: 2015-08-07 Last updated: 2015-09-21Bibliographically approved

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fulltext(1481 kB)33 downloads
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5310ce21f917f5ea5a6a2413a553f1a34991cdd32a631db13bc201e6533119d32e5654942686f0ac6c9f11447a7d45a3dcfb2aaa1e413b6ac3556d5864cb1d80
Type fulltextMimetype application/pdf

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Land and Water Resources Engineering (moved 20130630)
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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Language
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Output format
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