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1 959 kr
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20% rabatt med Storytel
Du handlar alltid fysiska böcker till specialpriser om du har eller startar ett abonnemang.
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Snabb leverans med CityMail, Early Bird, Instabox, Budbee, PostNord eller DSV. Du ser alla fraktalternativ och priser i kassan.
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Lämna tillbaka din bok kostnadsfritt med 14 dagars ångerrätt.
20% rabatt med Storytel
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Utforska miljontals ljud- och e-böcker och upptäck stories i alla format. Med ett abonnemang får du 20% rabatt på fysiska böcker!
Polymer demand varies considerably for different digestion processes as well as the same digestion processes at different locations and the reasons for these differences are not known. The objectives of this research were to develop a mechanistic understanding for these differences. The differences were hypothesized to depend on both the amount of charge in a sludge sample and the characteristics of the polymer. The first phase of the research was aimed at establishing the component of the sludge that creates the polymer demand and the second phase was aimed at understanding the interactions of polymers with the components of sludge. A number of samples were collected and analyzed for factors affecting polymer demand. The samples incluced MLSS, RAS, conventional aerobically and anaerobically digested, thermophilic anaerobically digested, temperature phased anaerobically digested, and an auto-thermal aerobically digested sample. Results from the first phase showed a good linear correlation between the optimum polymer dose (OPD) and biocolloid concentration as measured by soluble protein and polysaccharide concentration. In other words, these small particles (less than 4.2 mm created a significant portion of the polymer demand, especially for digested sludges. Conditioning samples with different polymers (varying charge density and configuration, linear, branched and hydrophobic) showed that the key characteristic in determining OPD is the charge density of the polymer. The shear associated with several full-scale dewatering devices was measured and quantified using the unitless Gt term. In addition, several field trials were performed to show the impact of Fe addition on polymer demand as well as methods to reduce the shear associated with high solids centrifuges.
1 959 kr
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Frank R. Spellman
Shin Takahashi
James G. Speight
Daina Taimina
The Makers of the Raspberry Pi Official Magazine
David B. Weishampel, David E. Fastovsky
Jennifer Doudna, Samuel Sternberg
Grace Lindsay
Joel Levy
Jakow Trachtenberg
James G. Speight
Richard O. Prum
Harriet Rix
Vaclav Smil
Andrew Dilnot, Michael Blastland
Richard Edmonds
Bodhisatta Hajra
Anthony Coulls
Richard Wrangham
Jim Bennett
Noson S. Yanofsky
Sarah Easter Collins
Frida Skybäck
Liz Moore
Colleen Hoover
Kristin Fägerskjöld
Armando Lucas Correa
Sharon Bolton
Ruth Lillegraven
Santa Montefiore
Kelly Rimmer
Martha Hall Kelly
Svenja O'Donnell
Nathan Harris
Holly Jackson
Louise Boije af Gennäs
Tina Norin
Kristin Fägerskjöld
Pernilla Lindroos
Anna Lönnqvist
Jessie Burton
Malin Nordström
Marc Levy
Emma Donoghue
Snezana Lindskog, Andie Lindskog
Tony Samuelsson
Andrev Walden
Tina Harnesk
Kathrine Nedrejord
Anthony Doerr
Marieke Lucas Rijneveld
Lauren Groff
Claire Messud
Claire Lynch
Sebastian Barry
Ray Celestin
Simon Stranger
Alice Munro
Linda Boström Knausgård
Marit Kapla
Ulf Stark
Sarah Easter Collins
Liz Moore
Ursula Scavenius
Colleen Hoover
Michel Jean
