High phosphate concentrations due to VFA production from sieved activated sludge at WWTP Ommen: A source identification and resource recovery strategy

Environmental guidelines (EU WFD) impose a strict effluent phosphate target on wastewater treatment plants (WWTP). An abundance of phosphate (and other nutrients) in a water body is called eutrophication. Eutrophication can lead to algal blooms which result in very low oxygen concentrations in the water. Other species, like fish and aquatic...

Anaerobic Conversion of Proteins in Aerobic Granular Sludge

In an aerobic granular sludge (AGS) reactor treating urban wastewater, nutrient removal depends on the availability of carbon source. Domestic wastewater consists of 40-60% of slowly biodegradable complex substrates, out of which proteins form a major fraction. Despite this, little is known about the mechanisms of protein degradation in AGS....

Characterization and modelling of full-scale aerobic granular sludge

Existing mathematical models for aerobic granular sludge have focused solely on lab-scale reactors. In this study, an effort was made to adapt these models to simulate the processes of full-scale installations. The model is the first aerobic granular sludge model to use transient radial diffusion and multiple granule fractions. Aerobic and...