Patent EP-2468686-A1 (EP)
Inventor: KOLESNIKOV VLADIMIR PETROVICH
IPC: C02F3/30
Filed: 2010-12-21
Abstract: Integrated sewage biochemical treatment plant comprises mechanical treatment devices, a sewage- and sludge mixing chamber with a circulation pump and a combined biological treatment device including a biofilter with a plane feed, a spray line, collecting trays and drain collectors, which are connected to water-jet aeratic columns sunk in aeration zones, and after-treatment devices, where within the combined biological treatment device of 5-15000 m 3>/day capacity, the biofilter spray line includes trays with emptying fittings and reflecting disks. Integrated sewage biochemical treatment plant comprises mechanical treatment devices, a sewage- and sludge mixing chamber with a circulation pump and a combined biological treatment device including a biofilter with a plane feed, a spray line, collecting trays and drain collectors, which are connected to water-jet aeratic columns sunk in aeration zones, and after-treatment devices, where within the combined biological treatment device of 5-15000 m 3>/day capacity, the biofilter spray line includes trays with emptying fittings and reflecting disks. The distance from the trays emptying fittings upper ends to the disk reflectors is 0.8-2 m, and the distance between the trays centers and the distance between the trays fittings axes is 0.6-1.8 m. The aeration columns diameter is 25-100 mm, and their height above the liquid level in the aeration settling tanks is 1.2-3.5 m. The sinking height under the liquid level is 1.5-4 m. The distance between the upper columns cuts is 50-500 mm, and the distance between the lower aeration columns cuts is 0.5-3 m. The integrated sewage biochemical treatment plant is additionally equipped with denitrifier and/or post-treatment bioreactor with artificial feed, where a mixer is installed on the pipeline disposing clarified liquid from the first and/or the second combined plants to denitrifier, and a force main of circulating pumps of the first and/or the second combined plants and pipelines feeding coagulant solution are attached to this mixer. The plant additionally includes: a sorption filter with a feed cable of phosphate chemical adsorption, which is connected to the combined biological treatment device, denitrifier and/or bioreactor; and an excess sludge treatment device, whose thickener has pipelines leading from the combined biological treatment devices, biocoagulator, and/or anaerobic bioreactor. The thickener is connected to the belt filter press, whose dehydrated cake driving device is connected to the grainer, where the delivery line is also attached (for organic and/or mineral additives). The granule driving device is connected to the roller conveyor provided with electric heating elements, and/or to the microwave frequency radiators successively mounted above the transporter, which is connected to the holding tank. The air ducts from the combined biological treatment devices, excess sludge treatment devices, bioreactors, integrated mechanical treatment device rooms and sand catchers are successively connected to the drawing fitting of a high pressure fan whose head air duct is connected to the irrigation chamber of the air treatment device, where a device is equipped with a spray line connected to the circulation pump whose drawing fitting is connected to the air-fit section of the device. The clip-on section of the device filled with artificial feed is above the air-fit section, a collecting tray with direct air feeding pipes (has length of 1.2-2.5 m, and are 0.4-0.7 m sunk within the liquid of the air-fit section and filled in their lower section with small diameter pipes) and water-jet air ejection pipes are attached to drain tank and are located at 0.6-1.8 m above the liquid and sunk within the liquid by 1-3 m. The air treatment device has a connection to the sodium hypochlorite solution tank, odorant solution tank and air duct connected to the water-drop eliminator, which is successively connected to the activated carbon filter and ultraviolet disinfection unit. An independent claim is also included for a plant for integrated biochemical treatment of sewage with the organic impurities in biochemical oxygen demand (BOD) making up to 3000 mg/dm 3>, or with the content of organic impurities in BOD making up to 50000 mg/dm 3>of hydrogen sulfides, hydrosulfides, ammonium nitrogen up to 100 mg/dm 3>and fats up to 300 mg/dm 3>, including biocoagulators-flotators, combined biological treatment devices, where the head pipeline circulation pump is mounted within the mixing chamber of the second combined device and connected to the spray line of the same device, to the mixing chamber of the first combined device, to the water-jet aerator of the biocoagulator-flotator or to the excess sludge treatment device, and the feed chamber of aerator has 0.3-1.5 m long aeratic columns, whose canting angles to the pintle is 0-50[deg] , and tangential fittings, or (for the impurities concentration in BOD making up to 3000 mg/dm 3>) mechanical treatment devices and anaerobic bioreactors with BOD up to 50000 mg/dm 3>, a sewage-and sludge mixing chamber with circulation pumps and combined biological treatment devices, where the sewage driving pipeline is connected to the mixing chambers of combined biological treatment devices, and the head pipeline of the circulation pump mounted within the mixing chamber of the first combined devices, which is simultaneously connected to the spray line, and to the mixing chamber of the second combined device, and the head pipeline circulation pump, mounted within the mixing chamber of the second combined device is connected to the spray line of the device, to the mixing chamber of the first combined device, and to the excess sludge treatment device.