Search for dissertations about: "denitrification"

Showing result 21 - 25 of 82 swedish dissertations containing the word denitrification.

  2. 21. Reactors and biosensors for improved microbial degradation of acetonitrile

    Author : Kristina Håkansson; Bioteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biotechnology; Bioteknik; denitrification; nitrification; on-line analysis and control; Clark electrode; biosensor; biofilm process; acetonitrile; microbial degradation;

    Abstract : Biodegradation is becoming an attractive mode of operation for eliminating toxic chemicals released from industrial processes or already present in the environment. One needs, however, not only to identify organisms capable of degrading such chemicals, but also to address the issue of whether these chemicals, after being degraded, will be toxic to the degrading organisms if present in high concentrations. READ MORE

  4. 22. Structure and function of copper-containing nitrite reductase from Rhodobacter Sphaeroides 2.4.3

    Author : Frida Jacobson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nitrite reductase; nitrite reduction; crystal structure; redox; denitrification; copper protein; electron transfer;

    Abstract : .... READ MORE

  5. 23. Effects of heavy metal contamination on carbon and nitrogen cycling : An ecological approach to assess risks to soil functions

    Author : Ingrid Rijk; Alf Ekblad; Dan Berggren Kleja; Erik Karltun; Örebro universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; heavy metals; soil contamination; stable isotopes; N cycling microbial guilds; 13C; 15N; nitrification; denitrification; biochar; soil respiration; microbial activity; bioavailability;

    Abstract : Soil contamination with heavy metals may disrupt soil microorganisms with important roles in carbon (C) and nitrogen (N) cycling. However, there is a lack of understanding on how microorganisms are affected in soil, which may lead to a mismatch when assessing risks of contaminants to field soils. READ MORE

  6. 24. Unlocking Sustainability in Wastewater Denitrification through Waste-Derived Volatile Fatty Acids

    Author : Tugba Sapmaz; Mohammad J Taherzadeh; Eric D. Van Hullebusch; Högskolan i Borås; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; volatile fatty acids; wastewater denitrification; ammonium removal; sustainable carbon source; Resource Recovery; Resursåtervinning;

    Abstract : Carbon sources play a critical role in biological nitrogen removal during wastewater treatment, where strict total nitrogen limits on effluent discharge apply. Organic carbon sources serve as electron donors in the denitrification for heterotrophic denitrifiers. READ MORE

  7. 25. Risk of nitrous oxide emissions and potential of bioaugmentation when treating digester supernatant via nitrification-denitrification

    Author : Fredrik Stenström; Avdelningen för kemiteknik; []
    Keywords : Bioaugmentation; Digester supernatant; Inoculation; Nitrification-denitrification; Nitrifiers; Nitrous oxide emissions; Reject water; Bioaugmentation; Digester supernatant; Inoculation; Nitrification-denitrification; Nitrifiers; Nitrous oxide emissions; Reject water;

    Abstract : This thesis examines two different impacts of sidestream treatment of digester supernatant via nitrification-denitrification in a sequenced batch reactor (SBR). One of the impacts is the detrimental formation of nitrous oxide, and the other is the positive boosting of nitrifiers to the mainstream process through bioaugmentation. READ MORE