DEHYDRATION TREATMENT METHOD OF SLUDGE

• Main Authors: FUKUSATO YUTAKA, ITO SHINJI, YOSHII TAKAHIRO, SEO ATSUKO, YAMADA SADAKAZU
• Format: Patent
• Language: English
• Published: 14.12.2006
• Subjects: BLASTING; CHEMISTRY; COMBINED HEATING AND REFRIGERATION SYSTEMS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; METALLURGY; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; WEAPONS

PROBLEM TO BE SOLVED: To provide a freezing and melting treatment method capable of further reducing a treatment cost by reducing the number of times of treatment in freezing and melting treatment much in the consumption quantity of energy while making use of the advantage of the freezing and melting treatment method. SOLUTION: Untreated sludge is supplied to a freezing and melting treatment tank 3 from a sludge supply tank 2 to be subjected to freezing and melting treatment and the sludge subjected to freezing and melting treatment is dehydrated by a dehydration treatment device 6. The sludge dehydrated in the dehydration treatment device 6 is supplied to the sludge supply tank 2 to be mixed with the untreated sludge and the concentration of the sludge in the sludge supply tank 2 is enhanced while a cooling medium or a heating medium is supplied to the freezing and melting treatment tank 3 from an ammonia absorbing freezer 10 to freeze and melt the dehydrated sludge. COPYRIGHT: (C)2007,JPO&INPIT