Fremgangsmåde til kombineret kemisk og biologisk behandling af organisk affaldsmateriale.

摘要

1,269,223. Treating sewage. DORROLIVER Inc. 24 March, 1969 [22 March, 1968], No. 15239/69. Addition to 1,206,601. Heading C1C. The process of parent Specification is modified by adding during or after aeration of the sewage another precipitant which is a metal salt.