Sökning: "municipal sewage"

Visar resultat 1 - 5 av 43 avhandlingar innehållade orden municipal sewage.

  1. 1. Health of municipal sewage workers : Studies of cancer incidence, biomarkers of carcinogenicity and genotoxicity, and self reported symptoms

    Författare :Lennart Friis; Uppsala universitet; []
    Nyckelord :Medical sciences; Abdominal symptoms; alkaline single cell gel assay; asthma; cancer; comet assay; dyspepsia; genotoxic exposure; Helicobacter pylori; IBS; occupational epidemiology; respiratory symptoms; sewage workers; MEDICIN OCH VÅRD; MEDICINE; MEDICIN; arbets- och miljömedicin; Occupational and Environmental Medicine;

    Sammanfattning : The occupational exposures of sewage workers are complex and variable, and include a great variety of biological and chemical agents. Previous research has focused mostly on infections and various symptoms among sewage workers, e.g. abdominal and respiratory symptoms. LÄS MER

  3. 2. Removal processes in sewage treatment plants : Sludge quality and treatment efficiency of structurally diverse organic compounds

    Författare :Ulrika Olofsson; Peter Haglund; Staffan Lundstedt; Juliane Hollender; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmetrics; flame retardants; GCxGC; non-targeted screening; mass flow; metals; plasticizers; poorly removed contaminants; POP; PPCP; prediction; Principal Component Analysis; removal efficiency; sewage; sewage treatment plants; sludge; sludge adsorption; sources; time-trend analysis; Environmental chemistry; Miljökemi;

    Sammanfattning : Large and ever-increasing numbers of chemicals, including large quantities of a broad spectrum of organic compounds are used in modern society. More than 30 000 of the more than 100 000 chemical substances registered in the EU are estimated to be daily used, of which many will be discharged into the waste-streams handled by municipal sewage treatment plants (STPs). LÄS MER

  4. 3. Resultatenheter i kommunalteknisk verksamhet : struktur, process och effekt

    Författare :Mikael Hellström; Företagsekonomiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; economic theory; econometrics; Economics; intention of change; municipal; organizational design; effects; profit center; economic systems; economic policy; Nationalekonomi; ekonometri; ekonomisk teori; ekonomiska system; ekonomisk politik;

    Sammanfattning : The focus of this thesis is on the most widespread organizational change that the public sector has gone through during the 1990s: the introduction, implementation and continuous use of profit centers. There are three major reasons for studying profit centers. LÄS MER

  5. 4. Enhanced biogas production from municipal WWTPs : Co-digestion of microalgae with sewage sludge and thermophilic secondary digestion of mesophilic digested sludge

    Författare :Jesper Olsson; Eva Thorin; Emma Nehrenheim; Raúl Muñoz Torre; Mälardalens högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy- and Environmental Engineering; energi- och miljöteknik;

    Sammanfattning : Biogas is produced when organic material is broken down in oxygen-free (anaerobic) conditions. This process is called anaerobic digestion and is used in most large and medium-sized municipal wastewater treatment plants in Sweden. LÄS MER

  7. 5. Flow-oriented studies for environmental management by local authorities : experiences from a regional substance flow analysis

    Författare :Annica Lindqvist-Östblom; Linköpings universitet; []
    Nyckelord :flow-oriented studies; material flow analysis; substance flow analysis; interpretation; local authorities; regional authorities; environmental management; cadmium; sewage;

    Sammanfattning : This thesis focuses on the issue of how to perform flow-oriented studies in order to become more useful for and adapted to local/regional authorities. Compared to traditional environmental monitoring and measurement of the state of the environment, flow-oriented studies are an attempt to broaden the approach to environmental concerns. LÄS MER