WASTEWATER DISPOSAL EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide wastewater disposal equipment capable of reducing a running cost in the treatment of dehydrated sludge. SOLUTION: The wastewater disposal equipment 1 is constituted so as to successively treat wastewater in a methane fermentator 2 and an activated sludge tank 3 and equipped with a stream generation means 7 for generating steam by the combustion of the biogas generated in the methane fermentator 2, a dehydration means 9 for dehydrating the excess sludge in the activated sludge tank 3 and drying means 11 and 12 for drying the dehydrated sludge in the dehydration means 9 by steam generated by the steam generater 7. The biogas generated in the methane fermentation 2 is burnt in the steam generater 7 to generate steam. The excess sludge generated in the activated sludge tank 3 is dehydrated by the dehydration means 9. The dehydrated sludge is dried by the heat of steam in the drying means 11 and 12.