Are the International North Sea Conferences making progress?
International Conferences on the Protection of the North Sea have been arranged at intervals since 1984. The first conference in Bremen had a major impact regarding protection of the environmental quality of the North Sea. The following conferences tried to follow up on the outcome and to develop further environmental protection issues. The results of […]
Etablering av biologisk fosforavskiljning i mindre reningsverk / Establishment of enhanced biological phosphorus removal in smaller wastewater treatment plants
Enhanced biological phosphorus removal (EBPR) of municipal wastewater is not a common treatment method in Sweden. An explanation could be insufficient knowledge about the EBPR process. This article aims to increase the knowledge by describing how to establish and evaluate enhanced phosphorus removal in smaller wastewater treatment plants. The phosphate accumulating organisms, PAO, demand an […]
Dagvattenkvaliteten i anslutning till hamnområdet i Västerås / Stormwater quality in the habour area of västerås
Storm water can contain pollutants that cause harmful health- and environmental disturbances. In a harbour area, the quality of storm water can be difficult to allocate from the harbours activity in comparison to other external activities, from neighbouring enterprises etc. This is because of the location of the harbour area, which usually is placed close […]
‘Low concentrations of high priority’ – Pharmaceutical and Personal Care Products (PPCPs); occurrence and removal at wastewater treatment plants
Development of advanced analytical tools and analysis of wastewater samples confirmed the presence of residual amount of pharmaceuticals in environment and WWTP effluent in many European countries. Significant amount of compounds (30–90 % of administrated dose of antibiotics) is transported as active substance via urine. Only some part of taken drug dose is metabolized by organisms and the rest is excreted in changed or unchanged form. Many non-target organisms, that could share some receptors with humans, could be exposed on pharmaceutical activity. Another important issue discussed is the combination of additive, synergistic and antagonistic effect that might reveal in the mixture of pharmaceutically active compounds introduced to the environment.
Styrmedel i vattenpolitiken – Vad säger ekonomisk teori och empiri? / Water pollution policies: What do we learn from economic theory and empirical evidence?
The EU Water directive requires cost effective achievement of predefined water quality targets at the drainage basin scales. It has been known among environmental economists for decades that this can be obtained only if each source is regulated according to its marginal cost and impact on recipients. The review presented in this paper indicates that […]
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Spårning av fekal förorening med hjälp av mikroorganismer / Microbial source-tracking of faecal pollution
During heavy rainfall and combined sewer overflow events, a lot of pathogenic microorganisms are released into our waterbodies. To be able to calculate the health risks properly, it is important to know the source of the contamination. While zoonoses such as Campylobacter, Cryptosporidium and enterohaemmorragic E. coli (EHEC) can be spread from animals to humans, […]
Individuell mätning av vatten – om hushållens respons och praktikerns överväganden / Individual metering and volumetric billing of water – about household response and practictioner’s considerations
We analysed household water consumption and -expense in a multi-residential area with and without individual metering and volumetric billing using statistical and qualitative methods. On aggregate, households consumed less hot and cold water with individual metering and volumetric billing than before, but in general there were no sweeping routine changes. High-consuming households decreased consumption the […]
Avloppets växtnäring till jordbruket i ett livscykelperspektiv / Plant nutrients in sewage to agriculture in a life cycle perspective
Recycling of the plant nutrients in sewage to productive land is a long-term goal set up by the Swedish society. In particular, recycling of phosphorus is considered important. To highlight recycling system from an agricultural perspective, a doctoral project was initiated with the objective to analyse environmental and resource aspects forsystems recycling wastewater nutrients to […]
Dricksvattenberedning av ytvatten: aktuella frågeställningar / Surface water treatment: current issues
Waterworks in Sweden that apply conventional surface water treatment are facing several challenges, including changes in raw water quality and demands for improved particle removal. Studies were conducted to evaluate conventional treatment and alternative process combinations with ultrafiltration, nanofiltration, and biologicalpre-filtration. In pilot-scale experiments, the removal of natural organic matter (NOM), particles, taste and odour […]