Some common components found in portable units include screens or filters for solids removal, sedimentation tanks for settling out particles, disinfection systems to destroy harmful germs or viruses, and filtration systems for more purification. Collected sludge is concentrated in a thickener, pumped into a solar drying dam and afterwards taken http://media.koma.or.id/index.php?qa=user&qa_1=columneagle37