Styrkor och svagheter hos gällande styrmedel för avloppsslam
Summary, in English
The study illustrates that current levels of cadmium and nonylphenol in the environment are problematic, and the exposure to humans and nature must be reduced. Hence, the only way to avoid negative effects on human health and the environment when using sewage sludge is to reduce its overall content of pollutants.
In addition, the study shows that the most effective way to further reduce the prevalence of cadmium and nonylphenol in sewage sludge is through stricter regulation in other areas, e.g. gas purification or the ban of a specific substance use in products. However, the implementation of tricter regulations has been problematic within Sweden. The overall assessment is therefore that the certification scheme called REVAQ is the best available method to further reduce the concentration of pollutants in sewage sludge. The aim with REVAQ is to reduce the amount of heavy metals and organic pollutants, through structured working methods at the waste water treatment plants. Since REVAQ will contribute to a reduction of the concentrations of pollutants, both the dispersion and the negative effects will be reduced too. REVAQ can therefore be used as an effective tool towards reaching ‘A Non-Toxic Environment’; one of sixteen environmental quality objectives set up by the SwedishGovernment. The recommendation of this paper is to give support to the waste water treatment plants and their work with REVAQ.