RU404U1 - Device for biological wastewater treatment "Aeranblok" - Google Patents

Abstract

1. A device for biological wastewater treatment, consisting of a rectangular tank with a water supply and drainage trays, divided by longitudinal vertical partitions into longitudinal corridors equipped with an aeration system, characterized in that the rectangular tank is divided by a transverse partition to form a transverse corridor serving as a recirculation regenerator-sealant active sludge, longitudinal corridors are purification steps, the water supply chute has openings for the input of source wastewater along the entire length of the longitudinal corridors, all corridors are separated by longitudinal inclined partitions that do not reach the bottom, equipped with windows with jet canopies and forming aeration and sludge separation zones in the corridors, under perforated bubblers are installed with inclined partitions, while the aeration zones of the cleaning stages are equipped with fixed and floating carriers for fixing the microflora, and the silt separation zones with thin-layer modules, longitudinal vertical The other partitions are equipped with windows for the passage of partially purified and clarified wastewater to the next stage of treatment, the drainage tray is located in the zone of sludge separation of the last stage of treatment, the transverse partition is equipped with a window for discharging sludge water located above the water level in the stages of treatment, sludge into the water supply tray and the sludge water collection tray, which communicates with the drainage tray through the sludge outlet window, and the aeration zones of the treatment stages are equipped with airlifts for pumping the sludge mixture into the regenerate

Description

V

MKI 5 C02F 3/0

Device for biological wastewater treatment Aranblock.

The alleged invention relates to the field of wastewater treatment, in particular, to biological treatment with activated sludge, and can be used for the treatment of municipal wastewater.

A device for biological wastewater treatment, consisting of a rectangular tank with water supply and drainage trays, divided by vertical partitions into longitudinal corridors equipped with an aeration system / 1 /.

The disadvantages of this device are: the use of part of the aeration tank for the regeneration of activated sludge, due to the fact that activated sludge under conditions of oxygen deficiency and reduced mass transfer in the secondary sumps significantly loses its performance (activity); the proper age (up to 16 days) of activated sludge is not ensured, which ensures the full growth and development cycle of nitrifying microorganisms due to the increased removal of suspended solids with purified wastewater from secondary settling tanks at activated sludge concentrations of more than 3 g / l and a sludge index of more than 100 conditions for the adaptation of activated sludge microorganisms to their environment; insufficient degree of purification from suspended solids, ammonium nitrogen and phosphorus compounds.

Known devices for biological wastewater treatment, which provide conditions for the adaptation of microorganisms of activated sludge, consisting of two or more sequentially located aeration tanks with secondary sumps and a separate system for the recycling of activated sludge / 2 /.

suspended and organic substances, ammonium nitrogen and phosphorus compounds; the difficulty of using floating carriers for attaching activated sludge microorganisms, the most effective and convenient to use and lower in cost, to ensure the age of activated sludge up to 8-16 days. and activated sludge concentrations up to 4-6 g / l.

The technical result obtained from the use of the proposed device is to increase the degree of purification from suspended and organic substances, ammonium nitrogen and phosphorus compounds by increasing the age of activated sludge to 8-16 days. and activated sludge concentrations up to 4-6 g / l.

In Fig.1 shows a device for biological wastewater treatment Aranblock, Fig.2 is a section aa in FigL.

The Araneblock biological wastewater treatment device consists of a rectangular tank 1 with a water supply 2 and a water discharge 3 trays, divided by two vertical vertical partitions 4 into two

and more longitudinal corridors equipped with an aeration system 5, which are cleaning stages, the tank 1 is divided by a transverse partition 6 with the formation of a transverse corridor 7, which serves as a regenerator-sealant of recirculated activated sludge, all corridors are separated by inclined not reaching the bottom partitions 8, equipped with windows 9 with hole-guiding visors 10 and forming in the corridors of the aeration zone 11 and sludge separation 18, hole bubblers 13 are installed under the partitions 8 not reaching the bottom, while the aeration zone is equipped with a step of the purification process are equipped with fixed 14 and floating 15 carriers for attaching microflora, and all the sludge separation areas are with thin-layer modules 16, the longitudinal vertical partitions 4 are provided with windows for the passage of partially purified and clarified wastewater 17 to the next cleaning stage, the transverse partition b is equipped with a sludge discharge window

- water 18, located above the water level in the stages of purification, the sludge separation zone of the regenerator-compactor 7 is equipped with a sludge collection tray 19 and the airlift for pumping compacted sludge 20 into the water supply tray 2, the aeration zones of the cleaning stages are equipped with airlift for pumping sludge mixture 21 into the regenerator-compactor 7 .

The number of cleaning steps is from 1 to 4.

The device operates as follows. Wastewater along the water supply tray 2 is dispersedly fed into the aeration zone 11 of the first purification stage, where a suspended activated sludge and biological film are formed on the surface of fixed 14 and floating 15 carriers. The sludge mixture through a slot not reaching the bottom of the partition 8 enters the desilter (in the sludge separation zone) 12 of the first stage, is partially clarified, and through windows 17 it enters the next stage of cleaning, where the same processes occur as in the first stage.

Part of the sludge mixture from the aeration stage of the first stage by airlift 21 is fed into the regenerator-compactor 7, from where the sludge water flows by gravity into the tray 3 through the window 18, and the compacted activated sludge by the airlift 20 is pumped into the water supply tray 2, where it is mixed with the source waste water and flows into aeration zone of the first cleaning stage 11. Recirculation of activated sludge between the aeration and sludge zones is carried out through windows 9 with jet guards 10 under the influence of an ascending air-water flow at the border not reaching the bottom eregorodok 8. The biologically treated waste water with activated sludge concentration not exceeding its growth output tray through the plenum 3. The bubblers 13 are periodically included for the purpose of stirred up on the surface of thin-layer modules and not reaching the bottom of partitions, and also in areas pop ilootdeleniya activated sludge.

- secondary sumps are subjected to reagent treatment in order to reduce the amount of phosphorus compounds and improve the sedimentation of activated sludge. Sludge from the secondary settlers is sent to the seal, and from there to further processing.

The composition of the initial wastewater supplied for treatment: COD 250MG / L, BPK5 - 90MG / L, suspended solids - 100mg / L, ammonium nitrogen - NH4 - 21MG / L.

Comparative data of the work of the known and proposed device for biological wastewater treatment at aeration time of 5 hours are shown in the table.

- / table

The proposed device, unlike all corridor aeration tanks, allows you to grow and maintain a proper concentration of activated sludge without violating the oxygen regime and hydrodynamic conditions of mass transfer of the sludge mixture. With the use of the device there is no need to recirculate activated sludge between the secondary sumps and aeration zones, which allows to reduce energy consumption and use a significant amount of regenerators for biological wastewater treatment. At each stage of the device, activated sludge is formed, the microorganisms of which are adapted to their environment and more effectively absorb wastewater pollution for their life.

As a fixed carrier (downloads), any durable polymer film is used, to which microorganisms of activated sludge are well attached, self-regenerate due to a flat and smooth surface and do not clog activated sludge with their debris.

The amount of activated sludge in the biologically treated waste fluid exiting the device does not exceed its growth, which, after settling, is completely removed as excess activated sludge.

This technological and constructive feature of the device allows increasing the age of activated sludge to 16 days and thereby ensuring a complete growth and development cycle of nitrifying microorganisms, exposing the sludge mixture to reagent treatment before clarification, and eliminating the need for additional tanks after secondary settling tanks.

The proposed technical solution allows to intensify the work of existing corridor aeration tanks and to provide deeper wastewater treatment.

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- List of used literature

1.Ya.A. Karelin, D.D. Zhukov, V.N. Zhurov, B.N. Repin Purification of industrial wastewater in aeration tanks. M., Stroyizdat D973, SL47-152.

2.O.K. Kolobanov, A.V. Ershov, M.E. Kigel Design of sewage treatment plants. Kiev, Budivelnik D977, p. 76-80.

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-Xgfti

Claims (2)

1. A device for biological wastewater treatment, consisting of a rectangular tank with water supply and drainage trays, divided by longitudinal vertical partitions into longitudinal corridors equipped with an aeration system, characterized in that the rectangular tank is divided by a transverse partition to form a transverse corridor that serves as a recirculation regenerator-sealant activated sludge, longitudinal corridors are steps of cleaning, the water supply tray has openings for input of initial sewage water along the entire length of the longitudinal corridors, all the corridors are divided by longitudinal inclined partitions not reaching the bottom, equipped with windows with flow-guiding visors and forming aeration and sludge zones in the corridors, hole bubblers are installed under the inclined partitions, while the aeration zones of the cleaning steps are equipped with fixed and floating carriers for fixing microflora, and sludge separation zones with thin-layer modules, longitudinal vertical partitions are provided with partially cleared and bleed windows waste water to the next purification stage, the drainage tray is located in the sludge separation zone of the last purification stage, the transverse partition is equipped with a sludge discharge window located above the water level in the purification steps, the sealant sludge recovery zone is equipped with airlift for pumping compacted sludge to the water supply tray and the sludge collection tray water, which through the sludge outlet window communicates with the drainage tray, and the aeration zones of the treatment stages are equipped with airlifts for transferring the sludge mixture to the regenerate op-sealant. 2. A device for biological wastewater treatment, characterized in that the number of stages of treatment is 1 to 4.