METHOD AND APPARATUS FOR TREATING ORGANIC WASTE WATER

摘要

PROBLEM TO BE SOLVED: To treat organic waste water containing organic matter, nitrogen and phosphorus in consideration of energy saving, the recovery of a useful substance and the utilization of the useful substance as resources. SOLUTION: Initial sedimented sludge separated in a first solid-liquid separation tank 1 or conc. sludge 11 thereof is dehydrated by a dehydrator 4 and the obtained dehydrated cake is burnt in a cake combustion process 7 and excessive sludge separated in a final solid-liquid separation tank 3 or concentrated sludge 31 thereof is digested in an anaerobic fermentation process 5 and phosphorus and nitrogen are recovered from the digested sludge formed in the anaerobic fermentation process 5 in a form of magnesium ammonium phosphate.