A comparison of aerobic granular sludge with conventional and compact biological treatment technologies
Artikel i vetenskaplig tidskrift, 2019

The aerobic granular sludge (AGS) technology is growing towards becoming a mature option for new municipal wastewater treatment plants and capacity extensions. A process based on AGS was compared to conventional activated sludge processes (with and without enhanced biological phosphorus removal), an integrated fixed-film activated sludge (IFAS) process and a membrane bioreactor (MBR) by estimating the land area demand (footprint), electricity demand and chemicals’ consumption. The process alternatives compared included pre-settling, sludge digestion and necessary post-treatment to achieve effluent concentrations of 8 mg/L nitrogen and 0.2 mg/L phosphorus at 7°C. The alternative based on AGS was estimated to have a 40–50% smaller footprint and 23% less electricity requirement than conventional activated sludge. In relation to the other compact treatment options IFAS and MBR, the AGS process had an estimated electricity usage that was 35–70% lower. This suggests a favourable potential for processes based on AGS although more available experience of AGS operation and performance at full scale is desired.

chemicals’ consumption

integrated fixed-film activated sludge

electricity demand

membrane bioreactor


Aerobic granular sludge


Simon Bengtsson

Promiko AB

Chalmers, Arkitektur och samhällsbyggnadsteknik, Vatten Miljö Teknik

Mark de Blois


Britt-Marie Wilen

Chalmers, Arkitektur och samhällsbyggnadsteknik, Vatten Miljö Teknik

David Gustavsson

VA Syd

Sweden Water Research

Environmental Technology (United Kingdom)

0959-3330 (ISSN)

Vol. 40 21 2769-2778



Annan naturresursteknik






Mer information

Senast uppdaterat