TREATMENT METHOD FOR FILTRATE AND WASHING WASTE WATER IN SLUDGE DEHYDRATOR

摘要

PROBLEM TO BE SOLVED: To reduce treatment cost by enhancing the recovery of a sludge solid and preventing an increase in the solid load of a water treatment system and allowing a flocculant to act on sludge efficiently. SOLUTION: The filtrate discharged from the screen 9 of a sludge dehydrator 6 and the washing waste water D on the surface of the screen are supplied to a stirring tank 11 and a sedimentation and separation tank 13 and the solid in the waste water is re-flocculated to be sedimented and separated. This separated and recovered solid is returned to the sludge supply tank 2 arranged to the front stage of the sludge dehydrator 6.