Nonoxidative removal of organics in the activated sludge process
Artikel i vetenskaplig tidskrift, 2016
The activated sludge process is commonly used to treat wastewater by aerobic oxidation of organic pollutants into carbon dioxide and water. However, several nonoxidative mechanisms can also contribute to removal of organics. Sorption onto activated sludge can remove a large fraction of the colloidal and particulate wastewater organics. Intracellular storage of, e.g., polyhydroxyalkanoates (PHA), triacylglycerides (TAG), or wax esters can convert wastewater organics into precursors for high-value products. Recently, several environmental, economic, and technological drivers have stimulated research on nonoxidative removal of organics for wastewater treatment. In this paper, we review these nonoxidative removal mechanisms as well as the existing and emerging process configurations that make use of them for wastewater treatment. Better utilization of nonoxidative processes in activated sludge could reduce the wasteful aerobic oxidation of organic compounds and lead to more resource-efficient wastewater treatment plants.
extracellular polymeric substances
distribution
biological phosphorus removal
DLVO theory
contact-stabilization
colloids
particle-size
in-situ transesterification
mixed
poly-beta-hydroxybutyrate
polyhydroxyalkanoate
microbial cultures
triacylglyceride
chemical oxygen-demand
Adsorption
high-rate activated sludge
different operational modes
polyhydroxyalkanoate pha production
waste-water treatment
Författare
Oskar Modin
Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik
Frank Persson
Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik
Britt-Marie Wilen
Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik
Malte Hermansson
Göteborgs universitet
Critical Reviews in Environmental Science and Technology
1064-3389 (ISSN) 1547-6537 (eISSN)
Vol. 46 7 635-672Biosorption i aktivslamprocessen: Mekanismer, kinetik och konsekvenser för processdesign
Formas (2012-1433), 2013-01-01 -- 2017-12-31.
Drivkrafter
Hållbar utveckling
Ämneskategorier
Vattenteknik
Miljövetenskap
Styrkeområden
Energi
DOI
10.1080/10643389.2016.1149903