Improved water quality – sustainable handling of sewage in the archipelago

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Finland and Sweden, 20 % of the residents live outside the central sewage system. According to calculations, these residents pollute the waterways more than the centralised sewage system. There is an obvious need for testing and development of modern methods for purification of sewage water from individual households. National and international regulations demand that sewage from seagoing vessels is properly disposed of and not pumped out into the sea. The need was apparent for knowledge and technology to support the principle of sustainable development, while at the same time being cost-effective. The aim of the project ’’Bättre vattenkvalitet – hållbar hantering av avloppsvatten i skärgården’’ was to gather documented knowledge about various small-scale sewage treatment alternatives, and to, in a larger scale, test sewage systems that according to the latest data were suitable for the suburbs. The project also comprised various pilot projects including follow-up of installations and their functionality, as well as possible environmental consequences. Additionally, the project would generate a suggestion for a network of stations for emptying septic tanks from leisure crafts including other services in the project areas.

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