IMPROVEMENT OF SANITARY SOLUTIONS FOR SMALL WASTEWATER TREATMENT SYSTEMS
The Swedish Delegation for Sustainable Technology and Stockholm Water Co. have initiated a competition for the design and construction of small wastewater treatment units. Improvements in environmental impact and potential for nutrients recycling are expected, compared with conventional technology used today, i.e. settling and infiltrarion or filtration beds. Such differenr types of treatment systems are presented in the paper. The treatment systems will be tested for a period of three years. Comparisons between conventional treatment methods and source separation techniques will be performed. A holistic approach will be used in the evaluation of the tested alternatives. Hence, the presented method for valuation will include aspects such as removal efficiency, hygienic safety, resource utilisation, potenrial for nutrient recycling, costs and user friendliness.