In Sweden more than 400 000 private households have not yet sufficient wastewater purification. These effluent is considered as an increasing problem and many onsite purification methods have been studied. In this investigation, the method of reactive bed filters have been tested by column and batch experiments. Five different kinds of filter materials with reactive surfaces have been studied concerning their capacity to absorb ammonium and phosphorus from wastewater. The materials that were examined are Filtra N, wollastonite Filtra P, blast furnace slag and Polonite®.

The municipality of Västervik, with support from Envipro Miljöteknik AB, is carrying out a main study of the minefields at Gladhammar. Mining of iron, copper and cobalt under different periods from the 16th century until the end of the 19th century has led to discharges of metals to the lakes situated downstream. The aim of the main study is to investigate the possibilities to reduce the environmental load on the surrounding ground and water caused by heavy metals from the mine. The present report is a part of the main study. The aim of the work is to investigate the geochemistry of the groundwater.

An increased demand for processed goods on the property market has contributed toinvestments within the Swedish sawmill industry. The purpose with this study is to make amarket investigation of pre cut lengths within a defined geographic area. The constituent forthis investigation is HAL (AB Hilmer Andersson) who invests in a new plane facility and twofinger jointing machines in affiliation to their sawmill in Lässerud, the vest part of Värmland.To investigate the demand of pre cut lengths and identifies the value creating factors and costfactors which the customer within the segments industry and property market perceive, havedifferent customer value theories been used. Theories of customer value and the theory aboutoffering has been the source of creating the qualitative interview with a selection of currentand new potential customers for HAL.The result of the study first gives an introduction of HAL?s new offering and a description ofHAL?s current customers, which gives the reader an understanding of why searching for newcustomers is made in the defined area.

Sammanfattning Kisel (Si) är det näst vanligaste ämnet (drygt 25 %) i berggrunden. Bara en del av detta är tillgängligt som monokiselsyra, den form i vilken kisel är upptagbart för växter. Jordens kiselinnehåll är beroende av bergets vittring. Mycket höga halter av kisel återfinns i naturen i vulkaniska substrat (pimpsten innehåller drygt 66 % Si och scoria närmare 47 % Si), i diatomit (ett mineral bestående av resterna från encelliga kiselhaltiga alger, s.k. diatoméer) innehållande 66 % Si, scoria approximatly 47% Si), in diatomite (a mineral consisting of the remainings of single celled algae, diatoms containing < 40 % Si) and in some clays (30-60% Si).