Sewage treatment process

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1. A PROCESS FOR THE TREATMENT OF SEWAGE WHICH COMPRISES:

(1) INTIMATELY CONTACTING FOR A PERIOD OF APPROXIMATELY 10 MINUTES SCREENED RAW SEWAGE WITH APPROXIMATELY 50 P.P.M. OF A CONTACT MATERIAL CONSISTING ESSENTIALLY OF A CATIONIC, SURFACTANT, HYDROPHOBIC AND ORGANOPHILIC CLAY COMPOSITION OF THE KAOLINITE TYPE IS PLATELIKE CRYSTALLINE FORM HAVING A PARTICLE SIZE DISTRIBUTION WITHIN THE RANGE OF FROM ABOUT 0.2 MICRON TO ABOUT 3 MICRONS AND AN AVERAGE PARTICLE SIZE OF 0.55 MICRON, ALL IN EQUIVALENT SPHERICAL DIAMETERS, AND HAVING A REFRACTIVE INDEX OF APPROXIMATELY 1.56, A SPECIFIC GRAVITY OF APPROXIMATELY 2.58, AND A PH WITHIN THE RANGE OF FROM ABOUT 6.1 TO ABOUT 6.5;

(2) ALLOWING THE CONTACTED MIXTURE OF SEWAGE AND CONTACTING MATERIAL TO SETTLE IN THE QUIESCENT STATE FOR A PERIOD OF APPROXIMATELY 10 MINUTES;

AND (3) DECANTING OFF AT A POINT INTERMEDIATE THE TOP AND THE BOTTOM OF THE SETTLED MIXTURE A TREATED SEWAGE HAVING A REDUCED BIOCHEMICAL OXYGEN DEMAND AND A REDUCED CONTENT OF SUSPENDED SOLIDS.

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1. A PROCESS FOR THE TREATMENT OF SEWAGE WHICH COMPRISES:
- (1) INTIMATELY CONTACTING FOR A PERIOD OF APPROXIMATELY 10 MINUTES SCREENED RAW SEWAGE WITH APPROXIMATELY 50 P.P.M. OF A CONTACT MATERIAL CONSISTING ESSENTIALLY OF A CATIONIC, SURFACTANT, HYDROPHOBIC AND ORGANOPHILIC CLAY COMPOSITION OF THE KAOLINITE TYPE IS PLATELIKE CRYSTALLINE FORM HAVING A PARTICLE SIZE DISTRIBUTION WITHIN THE RANGE OF FROM ABOUT 0.2 MICRON TO ABOUT 3 MICRONS AND AN AVERAGE PARTICLE SIZE OF 0.55 MICRON, ALL IN EQUIVALENT SPHERICAL DIAMETERS, AND HAVING A REFRACTIVE INDEX OF APPROXIMATELY 1.56, A SPECIFIC GRAVITY OF APPROXIMATELY 2.58, AND A PH WITHIN THE RANGE OF FROM ABOUT 6.1 TO ABOUT 6.5;
  
  (2) ALLOWING THE CONTACTED MIXTURE OF SEWAGE AND CONTACTING MATERIAL TO SETTLE IN THE QUIESCENT STATE FOR A PERIOD OF APPROXIMATELY 10 MINUTES;
  
  AND (3) DECANTING OFF AT A POINT INTERMEDIATE THE TOP AND THE BOTTOM OF THE SETTLED MIXTURE A TREATED SEWAGE HAVING A REDUCED BIOCHEMICAL OXYGEN DEMAND AND A REDUCED CONTENT OF SUSPENDED SOLIDS.

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