Filtration is used to dewater effluent, slurry and sludge. Sludge dewatering reduces its water content to be disposed of in landfills and reduces the volume of the residue for more stable and economical operation of the effluent plant. The major sludge dewatering processes include rotary drum vacuum filter, belt filter press and filter press. They use either negative or positive pressure to force water through the filter media, leaving the solids behind. Today most sludge dewatering uses a filter press with membrane plate to produce a high solids filter cake.

Main Research: Mohamad Sulong