APPARATUS FOR PRODUCING ORGANIC ACIDS FROM SEWAGE SLUDGE USING THERMAL OXIDATION AND METHOD THEREFOR CAPABLE OF IMPROVING NITROGEN REMOVING EFFICIENCY

摘要

PURPOSE: To provide an apparatus for producing organic acids from sewage sludge by using thermal oxidation and a method therefor, which are able to minimize discharge amount of sludge by decomposing and oxidizing the sludge generated from sewage and wastewater treatment plants and produce the organic acids as a carbon source required for an advanced sewage treatment. CONSTITUTION: The apparatus comprises a plurality of thermal oxidation reactors (110,120) which decomposes and oxidizes sludge generated from an advanced sewage treatment process into liquid state materials, a catalyst injection and recovery means (130) which injects catalyst in the thermal oxidation reactor and recovers the catalyst, a temperature and pressure control means (140) which controls the thermal oxidation reactor to keep under a predetermined pressure and at a predetermined temperature, heating means (111,121) which heat the thermal oxidation reactor to a predetermined temperature, an oxidizing agent supply means (150) which supplies oxidizing agent to the thermal oxidation reactor to oxidize the sludge in the thermal oxidation reactor, a heat-exchange means (160) which heat-exchanges high-temperature product in the thermal oxidation reactor with low-temperature concentrated sludge supplied to the thermal oxidation reactor to cool and heat them, and a storage tank (170) which separates reaction product supplied from the thermal oxidation reactor into organic acids and side products.