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.

chemical oxygen-demand

particle-size

different operational modes

mixed

biological phosphorus removal

poly-beta-hydroxybutyrate

distribution

high-rate activated sludge

DLVO theory

polyhydroxyalkanoate

waste-water treatment

extracellular polymeric substances

triacylglyceride

colloids

contact-stabilization

polyhydroxyalkanoate pha production

in-situ transesterification

microbial cultures

Adsorption

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)

Vol. 46 7 635-672

Drivkrafter

Hållbar utveckling

Ämneskategorier

Vattenteknik

Miljövetenskap

Styrkeområden

Energi

DOI

10.1080/10643389.2016.1149903

Mer information

Skapat

2017-10-07