SU1368268A1 - Device for biological cleaning of waste water - Google Patents

Abstract

The invention relates to biological wastewater treatment and improves the efficiency of biological water purification by maintaining the required number of bacterial cells and improves the L temperature mode of the process. When fed into the mixing chamber 4 of the wastewater biofilter, the latter moves with air and biofilm, passes through the chamber loading and enters the phase separation section 6 for coarse separation of biofilm. Salt water through pipe 18 is diverted for further purification, and biofilm is discharged in a vertical direction. channeling guide pipe 7 enters the mixing chamber 4. Once or twice a day loading stirred 13 pins 14 secured to the guide tube 7 adjustment chamber 5 with the load. The wiped off biofilm returns from the phase separation section 6 through the guide tube 7 to the mixing chamber 4. 2 Cp. Of the file, 1 sludge. I (L

Description

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The invention relates to a biology cell wastewater treatment and can be used for the treatment of municipal, industrial and agricultural waste water.

The purpose of the invention is to increase the efficiency of biological water purification by maintaining the required number of bacterial cells and improving the temperature mode of the process.

This goal is achieved by filtering the wastewater from bottom to top through the filtering material, loosening the feed 1-2 times a day by rotating the mixing device twice or twice, separating the biofilm from the load and returning it to the bottom of the biofilter through its central pipe biofilter V occupied by the load, calculated by the formula

V Fd / n,

where F is the loading surface area, d is the diameter of the loading fraction

material, m; n - the ratio of the circumference to

diameter equal to 3.14. The drawing shows the proposed device, a longitudinal section.

The device is a cylindrical body 1, which is divided by attached to the lower horizontal and upper (in the form of a reverse cone) perforated partitions 2 and 3 into detachable mixing chamber 4, loading chamber 5 and phase separation section 6.

In the center of the device there is a vertical guide tube 7, connected in the upper part with the rotation shaft 8, through which the biofilm is removed from the phase separation section 6. In the lower part of the guide tube 7, windows 9 sec are provided to communicate with the mixing chamber 4. visors 10 above them.

On the upper part of the guide tube 7, a free-wall partition 3 is mounted with a free pipe 11, the openings 12 of which are offset to the wall of the housing 1.

Aeration chamber 5 is filled with filter cartridge 13 in the form of gra

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zero lightweight synthetic material. On the guide tube 7, along the height of the irradiation chamber 5, there are pins 14, which loosen the load. The pin 15 is made in the form of a brush and also serves to clean the lower horizontal partition 2. The upper part of the guide tube 7 is coaxially located in the tube 16 which is attached to the guide tube 7 below the nozzle 11 of the upper perforated partition 3. Top edge of the nozzle 11 the upper perforated partition 3 is flush with the upper part of the guide tube 7,

The device is equipped with a pipe 17 for supplying the source liquid, a pipe 18 for discharging the purified liquid, a pipe 19 with a pneumatic aeration unit 20 located at the bottom of the mixing chamber 4 for supplying air. The device works as follows.

5 Sewage water enters through the pipe 17 into the mixing chamber 4 and through the main partition 2 rises into the chamber with loading 5. Having passed; .... loading 13 water and particles 13 of the biofilm washed out from the surface of loading 13, through a tapered perforated partition 3 get into the phase separation section 6 where coarse separation of the biofilm and purified water takes place. The sludge liquid through pipe 18 is retracted for further processing, and the sediment along the inclined walls of the conical partition 3 slides into the guide pipe 7 and through

0 of the window 9 enters the mixing chamber 4, mixing air from the pneumatic aeration unit 20 with the treated wastewater.

Once or twice a day, direction 5 of the pipe 7 with the pins 14 fixed on it is brought into rotation. Wiped out by loosening the loading of 13 biofilm through the phase separation section 6 and the guide tube 7

0 is returned to the mixing chamber. RU 4.

As a result of periodic loosening of the load, sticking and the formation of stagnant zones are avoided.

55 bake preserving most of the biofilm amount on the loading particles. The biofilm, having separated from the body of the charge, is washed away by the fluid flow, enters the phase separator

section, and from there to the mixing chamber.

Example. Foamed granulated polystyrene with an average diameter of 4 mm and a density of 120 kg / m is used as the filtering load. For a given water flow rate of 1 m / h and the amount of phenolic pollutants by COD of 300 mg / l, the surface area of the load F is equal to 850 m. The volume of the load, which is 1.08 m, is calculated by the formula.

The installation, which includes the primary clarifier, the described device for biological purification (biofilter) and the secondary clarifier are mounted. The primary clarifier has a diameter of 1.0 m. The biofilter diameter is 1.0 m, the loading height is 1.38 m. through the slotted caps from the blower. The volume of the secondary clarifier is 2.0 m.

Wastewater treatment is carried out in the following sequence.

Untreated sewage, which has passed through the grate and the sand trap, enters the primary sedimentation tank, where the heaviest impurities are deposited on the bottom, and the clarified water enters the biological treatment to the biofilter. The duration of primary settling is 1.5 hours. When water moves upwards through the filter charge, covered with biofilm, organic phenols are removed. The biologically purified water after the coarse separation of the biofilm in the phase-separation section of the biofilter is diverted to a further two-hour clarification to the secondary clarifier. To prevent silting up the load 1-2 times a day, it is loosened by a single, double rotation of the mixing device. The latter is horizontal pins attached in staggered order to a vertical pipe in a direction diametrically opposite to one plane.

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Claims (3)

1. A device for biological wastewater treatment, containing a cylindrical biofilter body, filled with a granular load with a density less than one, a pneumatic aeration unit, water supply and discharge pipes, characterized in that, in order to increase the efficiency of biological water purification by maintaining required number of bacterial cells and improvement of the temperature mode of the process; it is equipped with two perforated partitions, one of which is placed horizontally in the lower part of the body and The mixing chamber with its bottom is made in the form of a reverse cone with a central nozzle, located in the upper part of the body and forms a phase separation section, while the holes in the partition are shifted to the walls of the body, the device is also equipped with a guide tube with the possibility of rotation around it, with a stop glass attached to its upper part, and pins, explosions five 0 five shutting the load, and in the lower part of the pipe there are windows with roofs located above them. 2. A device according to claim 1, characterized in that the upper edge of the branch pipe of the upper partition is installed flush with the upper edge of the guide tube. 3. The device according to claim 1, of which is the fact that the pin above the bottom wall is made in the form of a brush.