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Hantering av toalettavfall från fritidsbåtar: Undersökning om dagens vattenbehandlingssystem för att minska övergödning i Östersjön
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2015 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The eutrophication in the Baltic Sea is a big issue which threatens marine ecosystems, increases the depletion of oxygen in the water and causes harm to aquatic animals. Human activities such as industries, agriculture, forestry and untreated sewage increase nutrient input (mainly nitrogen and phosphorus) which causes increased levels of plankton and bacteria. Sweden has suggested to prohibit recreational craft owners to discharge their untreated wastewater to the ocean. The aim for this study is to examine and analyze the different types of water treatment systems that exist today and to see what levels of bacteria and nutrients the effluent water has from the systems. This research will help the EU-commission to decide what demands you can put on the discharged effluent water on recreational crafts. The study shows that none of the existing systems is able to decrease the levels of nutrients in the effluent treated wastewater. This makes it hard for the EU-commission to decide on demands for recreational crafts. This may lead to increased use of drainstations of wastewater in harbors for owners.

Place, publisher, year, edition, pages
2015. , 16 p.
Keyword [en]
Water treatment system, Baltic Sea, eutrophication, marine sanitation device, annex 22, annex 26, oxidation, wastewater treatment
Keyword [sv]
National Category
Natural Sciences
URN: urn:nbn:se:umu:diva-111304OAI: diva2:869056
External cooperation
Subject / course
Examensarbete i miljö och hälsoskydd
Educational program
Bachelor of Science in Environmental Health
Available from: 2015-11-13 Created: 2015-11-12 Last updated: 2015-11-13Bibliographically approved

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Department of Ecology and Environmental Sciences
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