Sewage disposal system

Claim 1

IN A SEWAGE DISPOSAL SYSTEM FOR THE CONTINUOUS BACTERIOLOGICAL TREATMENT OF RAW SEWAGE AND HAVING AN INLET AND OUTLET, THE COMMUNICATION OF: (1) A TANK COMPRISING A LOWER CHAMBER AND AN UPPER CHAMBER SEPARATED FROM ONE ANOTHER BY A BAFFLE HAVING AN OPENING THEREIN, (2) MEANS FOR INDUCING THE FLOW OF SEWAGE INFLUENT INTO AND AROUND SAID LOWER CHAMBER FOR ANAEROBIC DIGESTION THEREIN, (3) MEANS FOR DIRECTING ANAEROBICALLY DIGESTED SEWAGE UPWARDLY FROM SAID LOWER CHAMBER INTO THE TOP OF THE UPPER CHAMBER FOR AEROBIC DIGESTION THEREIN, (4) MEANS BETWEEN THE TWO CHAMBERS ASSOCIATED WITH SAID BAFFLE FOR (A) DISCHARGING OXYGEN IN THE FORM OF MINUTE BUBBLES OF AIR INTO THE UPPER CHAMBER TO PROMOTE AEROBIC DIGESTION THEREIN, (B) DISCHARGING A LESSER AMOUNT OF OXYGEN IN THE FORM OF MINUTE BUBBLES OF AIR INTO THE LOWER CHAMBER, AND (C) DISCHARGING SMALL AMOUNTS OF LIQUID FROM THE UPPER CHAMBER TO THE LOWER CHAMBER DOWNWARDLY THROUGH SAID OPENING FOR FACULTATIVE DIGESTION OF SEWAGE IN THE IMMEDIATE REGION OF THE POINT OF DISCHARGE OF AIR IN SAID LOWER CHAMBER.