ORGANIC WASTE DIGESTION METHOD AND DEVICE

摘要

PROBLEM TO BE SOLVED: To enable prevention of damage due to MAP (magnesium ammonium phosphate) scale deposition in a digestion tank or a digested sludge transfer pipe, and improvement of phosphorus recovery rate in the subsequent phosphorus recovery process by controlling a pH value during digestion treatment. SOLUTION: The pH of sludge in the digestion tank 1 is measured by a pH measuring device 3, and an acid is added from an acid injection device 2 to the sludge in the digestion tank 1 based on the measured pH value. COPYRIGHT: (C)2006,JPO&NCIPI