... to the treatment of refinery wastes, along with the latest experience available from German refine- ries, are described in detail. Owing to a biological treating process, which is applied to-day in almost a l l cases, particular emphasis has to be laid on the problem of flocculation obstacles caused by certain...

... and insensitive to even fresh water. As the formation stabilization is attained by chemical means, the preparation and maintenance of shale control muds must be based primarily upon chemical criteria. The proper alkalinity-calcium relationship for effective shale control results in a flocculated mud system...