METHOD AND SYSTEM FOR TREATING HUMAN WASTE OR THE LIKE

PROBLEM TO BE SOLVED: To treat human waste or the like to attain sewage water discharge level with a simple system. SOLUTION: The human waste treatment system comprises a flocculation process 5 for adding a flocculant 4 into a material 1 to be treated 1 to make phosphorus insoluble, denitrification/nitrification processes 6, 7 and 8 for decomposing and removing nitrogen and organic materials by biologically treating the material to be treated sent from the flocculation process, a sludge separation process 9 for separating sludge from the denitrified/nitrified material sent from the denitrification/nitrification processes by a solid-liquid separation apparatus, an adjustment process 2 for adjusting the separated liquid separated from the sludge to the legal level to discharge the liquid to a sewer 13, a returning pipe 14 for returning 0-100 wt.% separated sludge as returning sludge to the denitrification process and a sludge dehydration process 17 for dehydrating the non-returned residual sludge with a dehydrator to form a dehydrated cake 18. In the system constituted of a small scaled system, the load of sewer is made small, the treatment cost is reduced and the eutrophication of waste water is avoided. COPYRIGHT: (C)2005,JPO&NCIPI