[Present-day status of the problem of the afterpurification of sewage].
D000332:Aerobiosis; D002606:Charcoal; D003102:Colloids / Q000302:isolation & purification; D005374:Filtration / Q000379:methods; D008903:Minerals / Q000302:isolation & purification; D009584:Nitrogen / Q000302:isolation & purification; D012498:Sanitary Engineering / Q000379:methods; D012722:Sewage; D013535:Suspensions / Q000302:isolation & purification; D014481:United States; D014871:Water Microbiology; D014876:Water Pollution / Q000517:prevention & control; D014881:Water Supply
D003102:Colloids; D008903:Minerals; D012722:Sewage; D013535:Suspensions; D002606:Charcoal; D009584:Nitrogen
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