System for sewage treatment

Claim 1

A SEWAGE PURIFICATION SYSTEM COMPRISING A PRIMARY IMHOFF TYPE OF TANK HAVING A CLARIFIER COMPARTMENT ADAPTED TO RECEIVE THE SEWAGE TO BE PURIFIED, A DIGESTER COMPARTMENT, AND A SLUDGE SLOT AT THE BOTTOM OF THE CLARIFIER COMPARTMENT THROUGH WHICH SOLIDS WHICH SETTLE TO THE BOTTOM OF THE CLARIFIER COMPARTMENT PASS TO THE DIGESTER COMPARTMENT, A BIOLOGICAL OXIDIZER TOWER HAVING AN INLET AT THE TOP THEREOF AND A COLLECTION SUMP AT THE BOTTOM THEREOF, A SECONDARY IMHOFF TYPE OF TANK HAVING A CLARIFIER COMPARTMENT, A DIGESTER COMPARTMENT, AND A SLUDGE SLOT AT THE BOTTOM OF THE CLARIFIER COMPARTMENT THROUGH WHICH SOLIDS WHICH SETTLE TO THE BOTTOM OF THE CLARIFIER COMPARTMENT PASS INTO THE DIGESTER COMPARTMENT, CONDUIT MEANS FOR DIRECTING THE FLOW OF SUPERNATENT LIQUID FROM THE PRIMARY CLARIFIER COMPARTMENT TO THE INLET OF THE BIOLOGICAL OXIDIZER TOWER, CONDUIT MEANS FOR DIRECTING THE FLOW OF SEWAGE FROM THE SUMP OF THE TOWER TO THE SECONDARY CLARIFIER COMPARTMENT, CONDUIT MEANS FOR DISCHARGING THE SUPERNATENT LIQUID FROM SAID SECONDARY CLARIFIER COMPARTMENT AND MEANS FOR DELIVERING AIR TO THE PRIMARY DIGESTER COMPARTMENT FOR EFFECTING AEROBIC DIGESTION THEREIN.