Search for dissertations about: "sludge"

Showing result 1 - 5 of 227 swedish dissertations containing the word sludge.

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

    Author : Ulrika Olofsson; Peter Haglund; Staffan Lundstedt; Juliane Hollender; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; 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;

    Abstract : 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). READ MORE

  2. 2. Sewage sludge dewatering by natural methods : influence on sludge nutrient content

    Author : Elisabeth Kvarnström; Luleå tekniska universitet; []

    Abstract : .... READ MORE

  3. 3. Use of the solids flux theory for activated sludge wastewater treatment process

    Author : Puhua Li; KTH; []
    Keywords : Activated sludge process; Limiting solids flux; Nitrogen; Removal; Sedimentation; Sludge age; Sludge blanket; Solid flux theory; Volatile fraction; Wastewater treatment;

    Abstract : .... READ MORE

  4. 4. Properties of Activated Sludge Flocs

    Author : Britt-Marie Wilen; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; floc strength; aerobic microbial activity; reflocculation; dissolved oxygen concentration; settling; deflocculation; filamentous microorganisms; shear forces; floc size; activated sludge;

    Abstract : The quality of the effluent from activated sludge treatment plants is highly dependent on the efficiency of the solid-liquid separation process. The aim of this thesis was to study (i) the effects of dissolved oxygen (DO) concentration on effluent turbidity and flocculation, as well as on the settling properties of activated sludge, for both short term and long term scales, and (ii) the influence of aerobic microbial activity on the stability of activated sludge flocs. READ MORE

  5. 5. Improvement of Wastewater Sludge Digestion

    Author : Michael Recktenwald; Tillämpad biokemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Anaerobic digestion; biogas; cation-binding agents; enzymes; enzymatic activity; extracellular polymeric substances EPS ; industrial scale trials; methanization; municipal sewage; sludge treatment; wastewater treatment plant;

    Abstract : The reduction of sludge volumes for disposal is a topic of high interest for wastewater treatment plants (WWTP) all over the world. Steadily increasing volumes for disposal create an economic, environmental, legislative and technological challenge. READ MORE