SU407843A1 - TREATMENT AREA - Google Patents

Description

one

This invention relates to sewage sludge dewatering devices and can be used in sewage treatment plants.

A well-known ground with a drainage base is known, where the sediment is dehydrated by filtering the liquid through a layer of sediment falling out of the sediment on the surface of the sediment. However, at such an area during the separation of sediment and liquid, the height of the suspension layer increases, the layer thickens, its porosity decreases, and the specific resistivity increases. As a result, the filtration rate first decreases, then the filtration almost stops. Such a sludge bed construction does not deplete the deep sludge dewatering.

The proposed silt site, in order to intensify the dewatering process, is equipped with perforated air distribution pipes located above and below the base.

FIG. 1 shows the proposed silt site, a plan view; in fig. 2 is a section along the line A-A in FIG. one.

The silt site contains a waterproof bottom 1, a drainage load 2, above which, at a height sufficient to form the filtering layer 3 of the slurry, air distribution pipes 4 are installed.

The pipes 4 are joined by a common collector 5, which is connected to the supply duct 6 by a hinge connection 7. Under the drainage load, there are non-perforated air distribution pipes 8 connected to the air duct 9. The pipes 8 and the air duct 9 can be used to drain filtered silt water between the blow-downs 9. The height of the sediment filtering layer depends on the properties of the dewatered suspension and is determined by an explosive method.

Ilova site works as follows.

After the nanoscale, the air from the compressor or blower is fed to the sludge site of the dewatered sludge on the air duct 6 and collector 5 into the air distribution pipes 4, through which it disperses over the filtering layer 3 sediment formed on the surface of the drainage load 2. The silt water is discharged through the pipes 8 and 9. The filtering layer 3 is periodically regenerated by the supply of compressed air through pipes 8.

After the sub-suspension of the precipitate to a predetermined humidity, the pipes 4 are raised to a vertical position and the precipitate is removed by means of mechanisms. After the sucked sediment has been removed, the drainage charge is washed with water supplied through pipes 4. The washing water is discharged through pipes 8.

The proposed sludge bed provides maximum filtration speeds with effective retention of the suspension, accelerates the process of drying the sediment due to evaporation, promotes aerobic stabilization of the organic matter of the sediment, and allows the filter layer to be regenerated.

Subject invention

A silt platform containing a drainage base, characterized in that, in order to intensify the process of sludge dewatering, it is provided with perforated air distribution pipes located above and below the base.

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