ARRANGEMENT FOR BIOLOGICAL PURIFICATION OF WASTE WATER

• Main Authors: ENDRE BORNEMISHSA,HU, RUDOLF KORDA,HU, SHANDOR KUBO,HU, LASLO PALOTS,HU, KATALIN SELESHI,HU, ISHTVAN RETSEI,HU
• Format: Patent
• Language: English; Russian
• Published: 15.06.1988
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The present invention provides an apparatus and process for treating sewage with activated sludge. The apparatus has a comminutor (1) for reducing the particle diameter of the sewage (if necessary) to not more than 20 mm, an aeration column (2) at least 10 m high to which the sewage is fed via pump (13). Sewage and activated sludge are drawn from the top of the column (2) by way of a pipe (14), aerated in an aerator (4) and returned to the bottom of the column. Also, sewage and activated sludge are withdrawn from the bottom of the column (2) along pipe (6) and transferred to a separator (7) that operates at a pressure that is not less than that prevailing at the bottom of the column (2). Separated sludge is returned to the column (2) by a pump (15) and purified sewage is removed from the separator (7) by way of a pressure-reducing unit (9).