Sewage sludge digestion process

Claim 1

IN A PROCESS OF TREATING FRESH SLUDGES IN A MINIMUM OF SPACE AND EQUIPMENT TO CONVERT THE SAME INTO PROESSED SLUDGE SUITABLE FOR DELIVERY TO SLUDGE BEDS, THE STEPS OF (1) CONDUCTING FRESH SLUDGE TO A SINGLE ENCLOSED DIGESTION UNIT; (2) INTRODUCING AT LEAST PARTIALLY-PROCESSED SLUDGE CONTAINING ANAEROBIC BACTERIA INTO SAID UNIT TO FORM AN INOCULATED FRESH SLUDGE MIXTURE WITH AN ALKALINE PH IN SAID UNIT; (3) THEN CIRCULATING SAID FRESH SLUDGE MIXTURE THROUGH SAID UNIT WHILE HEATING SAID FRESH SLUDGE MIXTURE AND VIOLENTLY AGIATING SAID FRESH SLUDGE MIXTURE TO FORM A TREATED SLUDGE MIXTURE INCLUDING SLUDGE LIQUOR AND SLUDGE SOLIDS; (4) THEN STOPING SAID CIRCULATING AND AGITATING AND DILUTING SAID TREATED SLUDGE MIXTURE IN SAID UNIT WITH WATER PURER THAN SAID SLUDGE LIQUOR; (5) THEN ALOWING SAID PARTIALLY-TREATED AND DILUTED SLUDGE MIXTURE TO REMAIN QUIESCENT IN SAID UNIT WHEREBY SAID SLUDGE SOLIDS SEPARATE FROM SAID DILUETED SLUDGE LIQUOR TO FORM A PROCESSED SLUDGE MIXTURE SUITABLE FOR DELIVERY TO SLUDGE BEDS; (6) WITHDRAWING AT LAST A PORTION OF SAID PROCESSED SLUDGE MIXTURE FROM SAID UNIT; AND (7) WITHDRAWING A CONTROLLED PORTION OF SAID PROCESSED SLUDGE MIXTURE FROM SAID UNIT AND STORING THE SAME FOR REINTRODUCTION INTO SAID UNIT.