Alla artiklar

Chemical composition of surface waters (lakes and rivers) of Latvia has been studied. The relationship between water composition, formation factors and human impact has been compared. Aquatic chemistry has been found to be controlled both by land-use pattern, human impact and hydrological factors, but in varying: extent for different water bodies. The possible sources of […]

This article explores the origins of our ”piped society”, from the point of view of water and wastewater technologies. Modern water and sewer systems proliferated in Europe in the late 19th century, and the aim of article is to investigate into the reasons for the rapid spread of these urban sanitary technologies, and especially the […]

The redox condition is an important factor controlling e.g. the mobility of compounds in groundwater. Reliable measurements of redox potentials in water are problematic to perform for a number of reasons. A fundamental reason is that natural waters are seldom, if ever, in a state of redox equilibrium. Each redox couple has its own potential […]

Redox sensors have been in use at the wastewater treatment plants in Odense, Denmark since 1990 Starting in April 2000 at the Northeast WWTP the signals from ammonium and redox sensors have been employed for the automatic control of the nitrogen removal process. This resulted in a reduction of the effluent total nitrogen concentration from […]

The following article is a literature review on possibilities of microalgal improvement of wastewater treatment in oxidation ponds in cold climate. Furthermore the paper covers the possible commercial microalgal products that can be produced using the nutrient resource in the wastewater. Very few investigations have been performed in cold climate. There is evidence that microalgal […]

This paper is based on a literature survey concerning current regulations and general practices of sludge use and disposal in the United States, European Union (in particular Sweden) and Chile. Almost all regulations analysed in this paper require relatively similar hygienisation procedures. Besides being based on the hygienisation method applied, some restrictions are related to […]

Demonstration studies were accomplished in the cities of Helsingborg, Halmstad and Sundsvall as part of the Technology Validation Project (TVP) ”Integrated Wastewater” (1997-2000). All three projects were focused on the analyses of the interaction between the sewer system and the wastewater treatment plant under variable operational conditions, created by the application of real-time control (RTC) […]

Three Swedish pilot projects have been carried out as part of the Technology- Validation Project (TVP) ”Integrated Wastewater” (1997-2000), supported by the European Commission. The overall objective of the TVP project was to develop and validate an integrated methodological and technological framework for the pollution impact analyses of complete urban Wastewater systems on the receiving […]

Pollution of land and water resources from agricultural production have become a major concern inside most member countries of the European Union (EU). This is basically due to concentrations of farm units, specialization and intensification of the production processes. The new EU Water Framework Directive gives possibilities to introduce environmental charges as a measure to […]

The rain statistics used in designing storm sewers in Malmö today does not include data of the last decades. A new evaluation of rainfall data from the last twenty years in Malmö has been made and new intensity-duration-frequency curves have been created. A comparison with earlier statistics shows large discrepancies. The reason for these is […]