A process for the preparation of a soil conditioner pulverfoermigen from sewage sludge

摘要

1,212,237. Treating sewage. J. R. LILJEGREN. 21 May, 1968 [23 May, 1967; 11 Jan., 1968], No. 24065/68. Heading C1C. Sewage is biologically purified and the largely inorganic solids remaining are precipitated with lime mixed with the sludge from a biological purification and dried by addition of unslaked lime.