| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sludge digestion system which can perform an operation sufficient to reliability while reducing an environmental load by effectively utilizing heat in treated water. <P>SOLUTION: In the sludge digestion system 1, sludge produced in purifying treatment for sewage is digested by the action of microorganisms such as anaerobic bacteria. The system is provided with: a digestion tank 9 storing the sludge so as to be digested into microorganisms; and a temperature control means 20 warming the sludge in the digestion tank 9 by waste heat recovered from the sewage and controlling the temperature of the sludge to the prescribed temperature suitable for the activity of the microorganisms such as anaerobic bacteria. The temperature control means 20 warm the sludge in the digestion tank 9 via heat exchange parts 18, 27 in which the sludge circulating through the inside and outside of the digestion tank 9 circulates, and controls the temperature of the sludge in the digestion tank 9 to the prescribed one. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
