SU1613438A1 - Modular installation - Google Patents

Description

The invention relates to the treatment of wastewaters of enterprises and localities and may find application in sewage treatment plants, especially for low flow rates and for limited areas.

The aim of the invention is to intensify the operation of the plant and to increase the degree of purification.

FIG. 1 schematically shows the proposed installation, a plan view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The device consists of a wastewater inlet unit 1, a primary settling chamber 2, equipped with a slit 3, averaging collection trays 4 and 5, equipped with removable partitions (gates) 6 and 7, biofiltration chamber 8, with rows of horizontal disk biofilters 9 and 10 with rotating perforated volume loading, and channels 11 and 12 of recirculation of activated sludge from secondary settling chambers. Channels 11 and 12 are formed by flooded plates 13 and 14. located at a distance from the peripheral edges of the disk biofilters. The plant is equipped with transverse partitions 15 and 16 separating the secondary settling chambers 17 and 18 from the biofiltration chambers. Chambers 17 and 18 of secondary settling are placed between rows of disk biofilters. The partitions 15 and 16 do not reach the bottom of the settling chambers and form slots for sliding the settled

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silt Chambers 17 and 18 have peretochnye partitions 19 and 20, as well as precast pockets 21 and 22.

The installation has a non-submerged partition 23, removable partitions (gates) 24 and 25, as well as inclined parallel partitions 26 and 27, forming a slotted channel 28 for removing excess sludge, trays 29 and 30 are intended to release treated water. The lower rus of the installation is divided into the primary fermenting unit 31 and secondary fermenting units 32 and 33 of the vertical partition 34. The installation contains a vertical partition 35, sludge pipes 36-38, an electromechanical drive 39 for rotating the biofilters.

The installation works as follows.

With stepwise sequential biofiltration, wastewater flows through the supply unit 1 and from the primary settling chamber 2 through the collecting averaging tray 4, when the gates 6 and 7 are closed, flows to the primary row of disk biofilters 9 into the biofiltration chamber 8.

After the first stage of biofiltration, the waste water through the flooded plate 13 and under the partition 15 enters the chamber 17. from which through the overflow partition 19 - further into the collection pocket 21. Then, the flowing over the submerged partition 23 with the open 24 and the closed gate 25, the water enters into the collecting averaging tray 5, and from it into the second row of disk biofilters 10 and further on, everything goes the same way as the first stage of the stage. From biofilter 10 through the flooded plate 14 under the partition 16 water flows into the chamber 18, and then through the overflow partition 20 into the collection pocket 22, from which purified water is discharged through the tray 30 to release purified water.

Part of the activated sludge is recirculated from chambers 17 and 18 through channels 11 and 12 into the biofiltration chamber to rows of disk biofilters 9 and 10, and excess activated sludge through slit channel B between inclined baffles 26 and 27 in inclined bottoms of chambers 17 and 18 is diverted to secondary fermentors 32 and 33, separated by a vertical partition 35 into sections for each p - 5 and biofilters. The raw sludge from the primary clarifier 2 through the slit 3 is discharged into the primary digester 31, which is separated from the secondary diggers by a vertical partition 34. The fermented sediments are periodically removed by sludge pipelines 36-38. The gaseous products of the broth are discharged through the open zones of contact of the lower septic rus with the atmosphere. The rotation of the loading of the disk bi5 filters is carried out by the drive 39.

In case of single-stage (parallel) biofiltration, wastewater from the primary settling chamber with closed gates 7 and 24 and open gates 6 and 25 according to

0 collectively averaging trays 4 and 5 enter the biofiltration chamber 8. Simultaneously for all the rows of disk biofilters 9 and 10 and further through the flooded plates 13 and 14, under partitions 15 and 16 into chambers 17 and 18 of secondary settling, of which through the overflow partitions 19 and 20 enters the collection pockets 21 and 22, purified water from the collection pocket 21 of the first section, the flow around the empty wall 23, enters the tray 29 of the release of purified water and then flows along the tray 30 along with the flow from the second collection pocket 22 release from both sections. Thus, the use of the proposed interlocked unit allows to intensify the work of the facility and to increase the degree of wastewater treatment by separating the rows of disk biofilters in the biofiltration chamber into sections and

0 supplying them with individual secondary settling tanks with a partitioning system, which allows stepwise biofiltration, or evenly distribute the load at one cleaning stage, and

5 also exclude compulsory and provide independent recycling of activated sludge from secondary settlers to each section of the rows of disk biofilters.

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FIG. five

Claims (2)

1. LOCKED INSTALLATION, comprising a vertical two-tier case, the upper tier of which is rectangular in plan and divided by partitions into primary and secondary settling chambers, prefabricated averaging trays, Oiofiltration chambers with rows of disk biofilters and a lower tier with primary and secondary fermenters, characterized in that in order to intensify the operation of the installation and increase the degree of cleaning, the averaging trays are equipped with removable partitions, secondary settling chambers are located between the rows of dis new biofilters and have transverse partitions not reaching their bottoms, as well as overflow partitions forming prefabricated pockets, biofiltration chambers are equipped with flooded plates located at a distance from the biofilter surface and forming recirculation channels of activated sludge from secondary settling chambers, the bottom of the biofiltration chambers is equipped with inclined septa forming a slot channel to remove excess sludge. Ξ 2. Installation according to claim 1, characterized in that the secondary fermenter is equipped with a vertical baffle dividing it into sections. _Λ