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Nonoxidative removal of organics in the activated sludge process

Oskar Modin (Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik) ; Frank Persson (Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik) ; Britt-Marie Wilén (Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik) ; Malte Hermansson
Critical Reviews in Environmental Science and Technology (1064-3389). Vol. 46 (2016), 7, p. 635-672.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Adsorption, colloids, contact-stabilization, DLVO theory, high-rate activated sludge, polyhydroxyalkanoate, triacylglyceride, waste-water treatment, extracellular polymeric substances, particle-size, distribution, poly-beta-hydroxybutyrate, chemical oxygen-demand, polyhydroxyalkanoate pha production, biological phosphorus removal, in-situ transesterification, different operational modes, mixed, microbial cultures



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Denna post skapades 2016-05-27. Senast ändrad 2017-04-09.
CPL Pubid: 237022

 

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Institutioner (Chalmers)

Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik (2005-2017)
Institutionen för kemi och molekylärbiologi (GU)

Ämnesområden

Energi
Hållbar utveckling
Miljövetenskap
Vattenteknik

Chalmers infrastruktur