A wastewater treatment system

Claim 1

A WASTEWATER TREATMENT SYSTEM COMPRISING, IN COMBINATION: A. A STORAGE TREATMENT TANK HAVING A RECEIVING CHAMBER FOR ACCOMMODATING WASTE PRODUCTS TO BE PROCESSED, SAID RECEIVING CHAMBER HAVING A PERFORATED FILTER SCREEN CONSTITUTING ONE WALL PORTION THEREOF, B. SAID TREATMENT TANK HAVING AN AERATION CHAMBER ADJOINING THE RECEIVING CHAMBER AND COMMUNICATING THEREWITH THROUGH SAID FILTER SCREEN, TO RECEIVE FLUID COMPRISING SOLIDS AND LIQUIDS THEREFROM, THE PERFORATIONS OF SAID SCREEN ENABLING SOLID PARTICLES SMALLER THAN A PREDETERMINED SIZE TO PASS THERETHROUGH TO SAID AERATION CHAMBER, BUT BLOCKING PARTICLES HAVING A SIZE LARGER THAN SAID PREDETERMINED VALUE, C. DIFFUSING MEANS FOR INTRODUCING AIR UNDER PRESSURE INTO SAID AERATION CHAMBER, FOR AERATING THE FLUID CONTENTS THEREOF, D. SAID TANK FURTHER HAVING A FIRST SETTLING CHAMBER FOR SEPARATING SOLID PORTIONS OF SAID FLUID FROM LIQUID PORTIONS THEREOF, E. MEANS FOR TRANSFERRING TO SAID FIRST SETTLING CHAMBER AERATED FLUID FROM AN AREA IN THE AERATION CHAMBER WHICH IS SUBSTANTIALLY BELOW THE UPPER SURFACE OF SAID FLUID BUT IS ABOVE THE BOTTOM LEVEL OF THE CHAMBER, WHEREBY NEITHER DENSE SOLID PORTIONS NOR FLOATING SCUM IS PASSED TO SAID FIRST SETTLING CHAMBER, F. SAID TANK FURTHER HAVING A SECOND SETTLING CHAMBER ADAPTED TO RECEIVE LIQUID FROM SAID FIRST SETTLING CHAMBER, G. FEEDBACK MEANS CONNECTED WITH SAID RECEIVING CHAMBER AND WITH SAID FIRST SETTLING CHAMBER, FOR RETURNING THE HIGHER DENSITY PORTIONS OF THE CONTENTS OF THE LATTER TO THE RECEIVING CHAMBER FOR FURTHER PROCESSING, H. SAID STORAGE TREATMENT TANK FURTHER HAVING AN OUTLET AND MEANS CONNECTED THEREWITH FOR DISCHARGING PORTIONS OF THE CONTENTS OF SAID SECOND SETTLING CHAMBER, I. AERATING AND DISTRIBUTION MEANS CONNECTED WITH SAID STORAGE TREATMENT TANK OUTLET FOR PROVIDING FURTHER AERATION OF THE EFFLUENT FROM SAID OUTLET, J. SAID AERATING AND DISTRIBUTING MEANS COMPRISING A DISTRIBUTION BOX HAVING AN ELBOW CONSTITUTING AN INLET THEREFOR, K. SAID DISTRIBUTION BOX FURTHER COMPRISING AN AERATION CHAMBER, L. DIFFUSING MEANS FOR INTRODUCING AIR UNDER PRESSURE INTO SAID DISTRIBUTION BOX AERATION CHAMBER, FOR AERATING THE FLUID CONTENTS THEREOF, AND M. A SETTLING CHAMBER FOR RECEIVING FLUID FROM SAID DISTRIBUTION BOX AERATION CHAMBER AND FOR SEPARATING SOLID PORTIONS OF SAID FLUID FROM LIQUID PORTIONS THEREOF, N. SAID DISTRIBUTION BOX FURTHER COMPRISING OUTLET MEANS COMMUNICATING WITH SAID DISTRIBUTION BOX SETTLING CHAMBER, FOR DISCHARGING PORTIONS OF THE CONTENTS THEREOF.