SU1212977A1 - Device for biological purification of highly concentrated waste liquid - Google Patents

Description

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The invention is firewater sewage and can be used in the biological treatment of wastewater.

The purpose of the invention is to increase the oxidative power of the plant by maintaining a high dose of activated sludge in the aeration zone.

The drawing shows the device, longitudinal section

STOCHNEGK cleaning device

water contains a tank 1, at the bottom of which there is an aeration channel 2, blocked by filter plates 3, with an air table attached to it. Above the aeration channel 2 of the tank 1 a rotating cylindrical drum 5 is installed, the surface of which is covered with mesh 6,

Inside the rotary drum 5, a duct 7 is installed with slotted nozzles 8 for periodic regeneration of the screen with air. Inside the duct 7 there is a pipeline 9 located 1-way slit nozzles 8, for periodic regeneration of the mesh fabric by backwashing with water. For poltachi STO liquid, there is a tray 10 in container 1.

The sieve drum is driven by an electric motor 11 through a gearbox 12. A siphon line 14 is made to discharge the purified liquid from the drum 5 into the stilling chamber 13. A small part of the activated sludge discharged through the sieve web 6 is separated in a secondary gravity sump 1 5 The construction connected to the trough chamber 13 by the chute, 71l of pumping active sludge from the secondary settling tank 15 to the tank 1, installed a circulation pump 1 and a pipeline 17 to the sludge of active sludge. Removal of excess sludge is carried out through a pipe 18 located in the lower part of the settling tank.

The device works the footing in a skinny way.

Sewage water through tray 10 enters tank 15 where it is mixed with activated sludge and cleaned by it. Air is fed into tank 1 through air outlet 4 into aeration channel 2 blocked by filter plates 3. Purified wastewater is filtered through

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- a lot of 6 reels 5 and siphon TT is transferred to the pipeline 14 into the soothing chamber 13e and from it to the second settler 15s where there is an additional discharge from the WATER-cleaned part of the activated sludge delivered to the mesh 6, the main part At the same time, the activated sludge remains in the tank 1. The clean water is discharged into the sewage system, and the separated sludge is fed into the tank 1 via the circulation pump 17 by means of a circulation pump 16. Pipe 18 serves to remove excess activated sludge to a distance.

When the aeration channel 2 is located under the mesh drum 5, the latter is washed by the upward flow of the water-air mixture. The resulting E1; hydrodynamic forces in this case exceed the adhesion forces (cohesion) of the sediment and the nets, which means that the filtration process through the mesh occurs without the formation of a sediment layer. This increases the filtration rate, and therefore 5 and the productivity of the structure. Regeneration of the mesh sheet b is carried out periodically, as it becomes soiled, by back blowing with air through the slotted nozzles 8 of the air duct 7 and backwashing with water and from the pipe 9 while rotating the drum.

When the web of grid 6 is fabricated, the construction is not emptied, since the web is replaced, and gradually roll (and the drum 5.

The use of the mesh drum 5 does not preclude the use of the secondary clarifier 15, since removal of the suspended substances varies 3 within 1000-2000 mg / l.

In the treatment of highly concentrated wastewater, the specific increase in activated sludge in which there is more removal of E; starred substances through the mesh fabric 6; It is possible to maintain high concentrations of activated sludge in the aeration zone without the use of redirection of syringes from a secondary clarifier. 15,

In sewage treatment, for which the specific increase in sludge is less than the removal of vvedenen: substances from the secondary clarifier 5 d, | 1 maintaining high doses of activated sludge in the zone of aera3 12129774

recycle it when using the proposed

help pump. Reagents allow to clean drains

When working with any drain through large doses of active

the rich septic tank 15 is supplied with sludge sludge under heavy loads on the sludge,

weighted mixture with concentration is suspended-5 to increase 2-3 times the speed

substances not more than 1500-2000 kg / l, filtering and, therefore,

 the separation of which does not represent the capacity of the structure to ensure

difficulties in gravity sludge mobility and ease of exploitation of any design, days ..

Claims (1)

DEVICE FOR BIOLOGICAL CLEANING OF A HIGH-CONCENTRATED WASTE LIQUID, containing a container with an aeration channel, filter plates, an riser, a stilling chamber and a secondary settler, characterized in that, in order to increase the oxidizing power of the structure by maintaining a high dose of activated sludge in the aeration zone, it is equipped with a net a cylindrical drum mounted above the filter plates with the possibility of rotation around its axis, a siphon pipe that discharges the purified liquid from the drum and a calming chamber and the return conduit of the activated sludge from the settling tank to the tank. * 12