title: [Elimination of bacteria and viruses by flocculation in treated sewage].
abstract: In laboratory experiments the elimination of bacteria and viruses in treated sewage by different flocculants varied between 47.9 and 99.5%. Ferric and aluminum chloride reduced both groups of microorganisms in a greater extent than polyelectrolytes, among those the cationic polymers were better suitable than nonionic and anionic types. With a combination of an anorganic flocculant and an polyelectrolyte no increased effect was seen according to the elimination of the colony number and the number of viruses.
mesh_terms: D000535:Aluminum; D000077410:Aluminum Chloride; D017607:Aluminum Compounds; D001419:Bacteria / Q000302:isolation & purification*; D002712:Chlorides; D004573:Electrolytes; D005290:Ferric Compounds; D005427:Flocculation; D011108:Polymers; D012722:Sewage; D014780:Viruses / Q000302:isolation & purification*; D014871:Water Microbiology
chemical_list: D017607:Aluminum Compounds; D002712:Chlorides; D004573:Electrolytes; D005290:Ferric Compounds; D011108:Polymers; D012722:Sewage; D000077410:Aluminum Chloride; D000535:Aluminum; C024555:ferric chloride
vernacular_title: Eliminierung von Bakterien und Viren durch Flockung im vorgereinigten Abwasser.