Experimental and mathematical characterisation of the rheological instability of concentrated waste activated sludge subject to anaerobic digestion

For a proper operational performance assessment of excess sewage sludge digesters in practice, a better understanding of waste activated sludge (WAS) rheological behaviour is important, especially regarding the low-shear and poor mixing zones in anaerobic digesters. The potential rheological instability of WAS with different total solids (TS)...

Potential impacts of supply water quality change on aged household connection pipes

Driven by solving water shortage problems and meeting the increasing strict regulations of water quality, changes of supply water quality are commonly happening worldwide. These kinds of irregular changes can have impacts on drinking water distribution systems with accumulated material, leading to chemical, physical and microbiological...

Rheological characterization of secondary sludge: impact of solid concentration and temperature

Rheological characterization of sludge is essential, since it is related to access sludge transportation and mixing performance, which is included in many processes in waste water treatment and sludge disposal. This study was carried out for characterizing the secondary sewage sludge after gravitational thickening from a Dutch wastewater...