Showing papers on "Sawdust published in 1968"

Process for preparing a soil conditioner from wood wastes materials

Abstract: FINELY DIVIDED WOOD WASTE MATERIAL SUCH AS GROUND PINE BARK OR SAWDUST OR THE LIKE, SEPARATELY OR IN ADMIXTURE, IS MIXED WITH A MICROBIAL SOURCE SUCH AS GROUND NATURAL MANURE, SEWAGE SLUDGE OR INDUSTRIAL WASTES. TO THE MIXTURE, THERE IS ALSO ADDED WATER AND THE TOTAL MIXTURE IS THEN HEATED, WITH AGITATION, IN THE PRESENCE OF A MOLECULAR OXYGEN CONTAINING GAS, SUCH AS AIR, IN AMOUNTS SUFFICIENT TO CAUSE AEROBIC DECOMPOSITION. D R A W I N G

Method for the production of active charcoal from sawdust treated with sulphuric acid

Abstract: AN IMPROVED METHOD FOR PRODUCING ADSORBEND CHARCOAL IS DISCLOSED, SAID METHOD INVOLVING THE DISTILLATION OF SAWDUST FROM RESINOUS WOODS IN THE PRESENCE OF A PREDETERMINED AMOUNT OF DILUTED SULPHURIC ACID AS A TWOFOLDACTION CATALYST. A MODIFICATION OF THE METHOD INVOLVES THE ADDITIONAL STEP OF REHEATING UPON COOLING, AT A TEMPERATURE EXCEEDING BY 50*C. THE DISTILLATION TEMPERATURE. THE ADDITION OF PORE-FILLING, COKE-FORMING COMPONENTS IS ALSO CONTEMPLATED. THE CHARCOAL SO PRODUCED IS PARTICULARLY ADVANTAGEOUS FOR VARIOUS PHYSICO-CHEMICAL PROCESSES, SUCH AS PURIFICATION OF WASTE AND SEWAGE WATERS AND OTHERS.