SU1105477A1 - Aeration tank-sump - Google Patents

Abstract

1. AEROTEN-SUSTAINER, comprising a casing separated by vertical partitions in the aeration and sludge settling chambers, source water supply and cleaned outlets, aerators, a deep clarification chamber with a filtering floating load and a grating, characterized in that purification efficiency of concentrated wastewater with drastic changes in con. soil contamination by ensuring periodic filter regeneration; while maintaining the quality of purified water constant, it is provided with additional partitions that form the switch and collect activated sludge chamber, located after the deep clarification chamber in the direction of the treated Liquid, the bottom of the settling chamber is inclined to the aeration chamber, and the bottom of the chamber deep clarification - with a slope to the switching chamber and collecting activated sludge, the deep clarification chamber is equipped with additional horizontally mounted grids that form a compartment and with filter loading, the fractional size of which decreases from the lower compartment to the upper one, with an agitator with blades located in the filter loading compartments, in the bottom of the switching chamber i there are desoldering windows, I have (Lead valves located on both sides of the bottom and installed in the sub-vertical partition, in which two rows of drainage windows are made: one row in the bottom part of the partition, the other at the level of activity in the structure. "J 5 7 SI JO L L. 2Slt Iput.l

Description

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This invention relates to compact combi-devices designed for the treatment of wastewater from undissolved and dissolved organic contaminants, suspended solids, and. can be used for the biochemical treatment of domestic and close to them in composition industrial wastewater. A device for biological wastewater treatment is known, which includes sedimentation and fermentation sediment chambers, an aeration chamber and a secondary settling tank equipped with a package of inclined plates for separating the sludge mixture, a final wastewater treatment chamber with a floating load, and a system for supplying the original and purified wastewater. waste water. The system of removal and transfer of sediment tO The disadvantage of this plant design is the inability to regenerate the floating load in the final wastewater treatment chamber, which leads to clogging of the latter with abrupt changes in the concentration of contaminants in the initial wastewater and removal of activated sludge from the secondary clarifier. The inability to regenerate the filtering load leads to the leakage of the activated sludge removed from the secondary clarifier to the stream of purified waste water, which reduces its quality of cleaning. The purpose of the invention is to increase the efficiency of purification of concentrated wastewaters with drastic changes in soil concentrations by ensuring periodic regeneration of the filtering load while maintaining the quality of treated wastewater constant. This goal is achieved by having an aeration tank containing a body divided by vertical partitions into chambers aeration and settling of the sludge mixture, supplying the source and removal of treated wastewater, aera T, ora, deep clarification chamber with filtering floating loading It is equipped with additional partitions that form the switch chamber and the collection of activated sludge, located after the deep clarification chamber in the direction of the treated liquid, the bottom of the settling chamber is full with a slope to the aeration chamber, and the bottom of the deep clarification chamber - with a slope to the switching chamber and collecting activated sludge,. the deep clarification chamber is equipped with additional horizontally installed lattices forming filter compartments, the fraction size of which decreases from the lower compartment to the upper one, with an agitator with blades located in the filter loading compartments, in the bottom of the switching chamber the sluice diverter windows with valves located with both sides of the bottom and a partition mounted on a movable in a vertical direction, in which two rows of OKOHJ drainage pipes are made, one row is in the bottom part of the floor orodki, the other - at the liquid level in the building. In order to drain purified water through the lower drainage windows at the moment of regeneration of the filtering load, the height of the upper drainage windows is equal to the distance between the valves that block the bottom discharge windows in the bottom of the switching chamber. FIG. 1 shows a sump, longitudinal section; in fig. 2 is a diagram of the operation of the chamber for switching and collecting sludge at the time of regeneration of the filter charge; in fig. 3 - release of excess sludge after regeneration of the filter by the filter; Aero tank-settler contains supply pipe 1, aeration chamber 2, sludge separation chamber 3 separated from aeration chamber 2 by vertical partitions 4 and 5, deep clarification chamber 6 separated from the chamber 3 additional baffles 7 and 8. The baffle 7 has a lower bent edge parallel to the bottom 9 of the chamber 3. The chamber 6 is divided in height by meshes 10-12 and contains a filtering load 1315j for mixing which, when regenerated, is Tren mechanical stirrer 16. The aerotank chamber 17 comprises a switching and collecting activated sludge. At the bottom of chamber 6, between the bottom 18 and the wall of chamber 17, there is a collecting bin 19. The chamber 17 is equipped with a movable leg 20 with two rows of drainage windows 21 and 22 and valves 23 and 24 located on both sides of the bottom of the chamber 17, in which Slot openings 25 are made. A collection tray 26 is provided for collecting the purified water, and a pipe 27 for removing it from the installation. A pipe 28 with a valve 29 is provided for draining the excess activated sludge. The aeration mixture in the aeration chamber 2 is carried out through aerators 30 laid in the bottom parts. The filter loading 13-15 has a density less than one, which eliminates the need for a device in the camera 6 lower support grids, as the loading tends to float and is maintained in this state by grids 10-12. Such loading is easily regenerated by mechanical mixing with a mixer 16. At the end of the regeneration process, loading takes its initial position under the grids 10-12 The presence of fractions of different filter loading sizes allows increasing its capacity and duration of the firotrocycle, which in turn simplifies the operation of the installation. The device works as follows. The initial waste water through pipe 1 enters the aeration chamber 2, where it is aerated in a mixture with activated sludge. The silt mixture from the aeration chamber 2 through the slit formed by partitions 4 and 5 enters the sludge mixture separation chamber 3, where it is settled. Active sludge from chamber 3 through the slit to the bottom of the bottom returns along an inclined edge by partitions 7 to the aeration chamber 2. The water clarified in chamber 3, containing a suspended bacterial mass (up to 20 mg-l) of activated sludge, through a slit formed by partitions 7 and 8, enters the chamber 6 of deep clarification. Part of the bacterial mass in the water is deposited in the bunker 19, part of the bottom of the bottom slit formed by the lower edge of the partition 7 and the bottom 9 returns to the aeration chamber 2. The clarified water is subjected to ftra-strain at a load of 13-15, with this a final clarification of the water from the suspended bacterial mass of activated sludge takes place. Purified water through the wall of the switching chamber 17, the culvert windows 21 enters the collecting tray 26 and is removed from the installation through the pipeline 27. In this mode of operation of the aero-settling tank, the partition 20 is in the lower extreme position, with the valves 23 blocking the diverting windows 25. Before starting the process of regenerating the filter charge, the partition 20 is raised to a height equal to the distance between the valves, and the windows 25 overlap with the valves 24 , and the lower edge of the windows 21 is above the liquid level in the structure, since their height is equal to the distance between 24 and 23. The mechanical agitator 16 is driven into the dampers, and the filtering load 13-15 is washed from the rear The bacterial mass stored in it, the main part of which is deposited in the bunker 19. A part of the activated sludge bacterial mass in the filtering load is fed with purified water into chamber 17, where the stream moves down (Fig. 2) to windows 22, and passes them to collect tray 26, because at this moment the windows 21 are Bbmie level of liquid in the structure. The bacterial mass of activated sludge is deposited in chamber 17 and collected in its lower part. Through the windows of the regeneration process of the filter loading, the mechanical stirrer 16 is turned off, the partition 20 is kept in the upper position for some time, and then (Fig. 3) lowered so that the lower edge of the windows .21 is approximately 1/4 of their height below the liquid level while the passageways 25 are open. The valve 29 is opened in the pipeline 28, and the activated sludge retained in the bunker 19 and in the lower part of the chamber 17 is withdrawn from the installation as excess active sludge. Thus, the proposed aeration tank allows periodically, during the sewage treatment process, to ensure the regeneration of the filtering load without shutting it down, while the quality of the treated wastewater is maintained. The use of the proposed aeration tank for cleaning household water.

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-n 7 and effluent wastewaters can increase the efficiency of wastewater treatment by BOD to 98%, by suspended substances to 97-98%, while the residual concentrations of contaminants are mg / l: BOD - 10-12 suspended solids 6-8. In addition, the aerotankot works steadily with abrupt changes in the concentrations of contaminants in the ORIGINAL wastewater, with changes in the sediment properties of activated sludge. -

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Claims (2)

1. AEROTEN-RESTAURANT, comprising a casing, divided by vertical partitions into aeration and sedimentation chambers of the sludge mixture, nodes for supplying raw water and discharged water, aerators, a deep clarification chamber with a filtering floating charge and a grate, characterized in that, for the purpose of, increase the efficiency of treatment of concentrated wastewater with abrupt changes in con-. pollution centers by ensuring periodic regeneration of the filter load while maintaining the quality of the purified water constant, it is equipped with additional baffles forming a switching chamber and failure 1 ♦ ♦ ♦ 25 22 (put.1 RA of activated sludge, located after the deep clarification chamber in the direction of movement of the processed liquid, the bottom of the settling chamber is sloped to the aeration chamber, and the bottom of the deep clarification chamber is inclined to the switching chamber and the collection of activated sludge, deep clarification chamber equipped with additional horizontally mounted gratings, forming compartments with filter loading, the size of the fractions of which decreases from the lower compartment to the upper, a stirrer with blades located in the filter loads of compartments, in the bottom of the switching chamber, sludge windows are made having valves located on both sides of the bottom and installed on a vertically movable partition, in which two rows of drainage windows are made! one row in the bottom part of the partition ', the other at the liquid level in the structure . • IIH <GY ' ^yao_ P5 2. The aeration tank according to π. 1, about t-drainage windows in a movable recession in that the height of the rod is equal to the distance between the valves