No abstract

Anaerobic membrane bioreactors for sludge digestion enable extensive degradation of organic matter with reduced reactor volume. The filtration efficiency mainly determines capex and opex. Filtration efficiency (critical flux in this study) for all digested sludges tested with TS > 2.5 % depended in particular on the apparent viscosity at the membrane surface. It did not correlate sufficiently with, among others, total solids concentration and the capillary suction time. The critical flux was improved by increasing the rotational speed (crossflow) and by reducing the viscosity of the digested sludge by adding iron salts.

No abstract

No abstract