‘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 […]
Reduced energy consumption and improved nitrogen removal by using more effective aeration
In this study, an aeration volume control strategy for an activated sludge process is evaluated in a pilot plant at Hammarby Sjöstad in Stockholm, Sweden. The main idea has been to let the DO concentration in some of the aerated compartments be determined by the DO concentration in other compartments. In this way only sensors […]
Phosphorus recovery by use of sludge fractionation
In working towards a sustainable society, recycling and recovery of products together with handling of scarce resources must be considered. The growing quantities of sludge from wastewater treatment plants and the increasingly stringent restrictions on landfilling and on agricultural use of sludge are promoting other disposal alternatives. Sludge fractionation, providing sludge volume reduction, product recovery […]
sewsys – ett verktyg för att bestämma källor till dagvattenföroreningar och pröva olika åtgärder / SEWSYS – a tool for analysis of stormwater pollution sources and evaluation of abatement strategies
Stormwater is known to be a potentially large contributor of toxic substances to receiving waters. To be able to model scenarios related to abatement strategies and quality source control, i.e. reducing the pollutants at the source, a substance flow modelling tool has been developed. The computer model is called SEWSYS and themodelling framework incorporates generation […]