Process for sewage treatment

Claim 1

THE METHOD OF TREATING SEWAGE WHICH COMPRISES SUBJECTING RAW SEWAGE TO PRIMARY CLARIFICATION, SUBJECTING THE CLARIFIED SEWAGE TO TRICKLING FILTER TREATMENT, SUBJECTING THE FILTEERED MATERIAL TO SECONDARY CLARIFICATION, SEGREGATING AT LEAST A PORTION OF THE MATERIAL IN PROCESS CONTAINING NITRIFYING ORGANISMS AFTER IT HAS BEEN SUBJECTED TO THE TRICKLING FILTER TREATMENT, THE QUANTITY OF SUCH SEGREGATED MATERIAL BEING EQUAL TO NOT MORE THAN 15% OF THE VOLUME OF FLOW OF RAW SEWAGE, CONTINUOUSLY SUPPLYING SUCH SEGREGATED MATERIAL WITH BOTH OXYGEN AND NITROGENOUS FOOD FOR A PERIOD SUFFICIENT TO INDUCE RAPID GROWTH OF SUCH ORGANISMS, CONTINUOUSLY RETURNING CULTURED MATERIAL RICH IN NITRIFYING ORGANISMS FROM SAID SEGREGATED MATERIAL DIRECTLY TO THE MAIN FLOW OF SEWAGE, AT A POINT PROIR TO SAID TRICKLING FILTER TREATMENT AND IN SUBSTANTIALLY THE SAME CONDITION AND QUANTITY AS IT LEAVES THE SEGREGATED MATERIAL, TO RENDER SAID RETURNED NITRIFYING ORGANISMS AVAILABLE TO THE MATERIAL IN PROCESS DURING THE TRICKLING FILTER TREATMENT, SUBJECTING ALL CULTURED MATERIAL REMOVED FROM SAID SEGREGATED MATERIAL TO SAID TRICKLING FILTER TREATMENT PRIOR TO THE TIME THAT IT OR ANY ADMIXTURE THEREOF WITH ANY OTHER MATERIAL IS RETURNED TO THE SEGREGATED MATERIAL AND DISCHARGING THE EFFLUENT FROM THE SECONDARY CLARIFICATION TO A POINT OF DISPOSAL.

Claim 2

THE METHOD OF TREATING SEWAGE WHICH COMPRISES SUBJECTING RAW SEWAGE TO PRIMARY CLARIFICATION, SUBJECTING THE CLARIFIED SEWAGE TO TRICKLING FILTER TREATMENT, SUBJECTING THE FILTEERED MATERIAL TO SECONDARY CLARIFICATION, SEGREGATING AT LEAST A PORTION OF THE MATERIAL IN PROCESS CONTAINING NITRIFYING ORGANISMS AFTER IT HAS BEEN SUBJECTED TO THE TRICKLING FILTER TREATMENT, THE QUANTITY OF SUCH SEGREGATED MATERIAL BEING EQUAL TO NOT MORE THAN 15% OF THE VOLUME OF FLOW OF RAW SEWAGE, CONTINUOUSLY SUPPLYING SUCH SEGREGATED MATERIAL WITH BOTH OXYGEN AND NITROGENOUS FOOD FOR A PERIOD SUFFICIENT TO INDUCE RAPID GROWTH OF SUCH ORGANISMS, CONTINUOUSLY RETURNING CULTURED MATERIAL RICH IN NITRIFYING ORGANISMS FROM SAID SEGREGATED MATERIAL DIRECTLY TO THE MAIN FLOW OF SEWAGE, AT A POINT PROIR TO SAID TRICKLING FILTER TREATMENT AND IN SUBSTANTIALLY THE SAME CONDITION AND QUANTITY AS IT LEAVES THE SEGREGATED MATERIAL, TO RENDER SAID RETURNED NITRIFYING ORGANISMS AVAILABLE TO THE MATERIAL IN PROCESS DURING THE TRICKLING FILTER TREATMENT, SUBJECTING ALL CULTURED MATERIAL REMOVED FROM SAID SEGREGATED MATERIAL TO SAID TRICKLING FILTER TREATMENT PRIOR TO THE TIME THAT IT OR ANY ADMIXTURE THEREOF WITH ANY OTHER MATERIAL IS RETURNED TO THE SEGREGATED MATERIAL AND DISCHARGING THE EFFLUENT FROM THE SECONDARY CLARIFICATION TO A POINT OF DISPOSAL.