2002-2

The monitoring programmes for Swedish waste receiving waters are designed according to conditions existing 40-50 years ago. Today there is a strong need to renew these programmes. They don’t include information about changes in primary pollution load, which means that cause and effect can’t be studied. In addition, a lot of unnecessary monitoring is performed […]

Residents’ daily routines and the construction of residential buildings are important ingredients in a strive towards a sustainable society. City councils, building companies, and infrastructure service providers develop ways to conserve evergy and water. However, increasingly recognized is the importance of the residents’ willingness to contribute to achieving the environmental goals. Here is presented an […]

A theoretical and experimental study has been performed to give a basis for recovery of phosphorus and Other products from sewage sludge and ash with application to Henriksdal wastewater treatment plant (Hultman et al., 2002). Special attention is given in this article on the use of supercritical water oxidation followed by phosphorus recovery (Aqua Reci). […]

Some of the brewing industry’s special quality demands – in addition to current legislation – on the water raw material are briefly discussed. To avoid oxidative quality deterioration of the products, the content of oxygen as well as compounds capable of catalysing oxidation must be kept at a very low level. Similarly, residual chlorine must […]

Since the 1950s, different water management associations characterised by voluntariness are taking part in the Swedish water administration. Certain conditions prevail regarding the co-ordinated recipient monitoring and due to the Act on water associations. The act strictly regulates the purpose with this kind of association; to promote appropriate utilisation of watercourses. Those actors given prior […]

The saturator system is the most cost consuming part in DAF operation and optimization of the used methods is of great economical interest. An ejector-based system for use in a pilot plant was evaluated with novel air collecting methods. Three ejectors with increasing size were examined and a relation between ejector water velocity and a […]