Search for dissertations about: "reject"

Showing result 1 - 5 of 162 swedish dissertations containing the word reject.

  2. 1. Extended impregnation kraft cooking of softwood : Effects on reject, yield, pulping uniformity, and physical properties

    Author : Katarina Karlström; Mikael E. Lindström; Elisabet Brännvall; Kristofer Gamstedt; Anna Jacobs; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high kappa number pulp; extended impregnation; softwood; spruce; picea abies; pine; pinus sylvestris; uniform delignification; kappa number distribution; reject; yield; tensile index; tensile stiffness index; SCT; starch multilayers; mechano-sorptive creep; hygroexpansion; dimensional stability; eucalypt; birch; acacia; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Abstract : Converting wood into paper is a complex process involving many different stages, one of which is pulping. Pulping involves liberating the wood fibres from each other, which can be done either chemically or mechanically. READ MORE

  4. 2. Effects of Reject Refining at High Temperature on TMP Fibre Properties

    Author : Sven Norgren; Hans Höglund; Lars Johansson; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fibre collapse; fibre decollapse; high temperature; refining; reject; roughening; bonding; acoustic emission; mechanical pulping; softening temperature; bond strength; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Abstract : .... READ MORE

  5. 3. 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

  6. 4. Start-up and operational strategies for deammonification plants : - a study with one-stage moving bed biofilm reactors treating reject water

    Author : Linda Kanders; Eva Thorin; Susanne Lackner; Mälardalens högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy- and Environmental Engineering; energi- och miljöteknik;

    Abstract : To limit eutrophication, wastewater treatment plants use biological methods to convert degraded nitrogen to nitrogen gas. Deammonification, or partial nitritation in combination with anammox, has been shown to be an energy efficient process. READ MORE

  7. 5. 60 GHz Mixer and Multifunctional MMICs in GaAs pHEMT and mHEMT technologies

    Author : Sten Gunnarsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Image reject mixer; Broadband wireless communication; Single-chip; Multifunctional; Mixer; Balanced resistive mixer; GaAs; Dual-quadrature mixer; 60 GHz; Receiver; pHEMT; MMIC; High data-rate; Double balanced Gilbert mixer; mHEMT; Transmitter; V-band;

    Abstract : In recent years, the 60 GHz band has gained increased academic and commercial interest mainly due to the relative large amount of license free and little used frequency spectrum located in vicinity of 60 GHz. The exact locations of these free frequency bands varies locally but the 5962 GHz band overlap around the world and is therefore a true world wide license free band. READ MORE