CS225474B1 - Filling for aerobe and anaerobe biological filters for cleaning of waste water and for the liquid cooling in the cooling stacks - Google Patents

Description

SUMMARY OF THE INVENTION The present invention relates to a cartridge for aerobic and anaerobic biological filters for purifying sewage and cooling towers for cooling liquids.

Biological filters and cooling towers currently use a wide range of cartridges for biological wastewater treatment and cooling towers, mainly of inert polymer mass ·

In the treatment of waste water by biological filtration, the waste water is fed to the filter cartridge in a biological filter formed by a tower method and allowed to flow from top to bottom over the filter cartridge while ensuring anaerobic conditions in the filter.

For anaerobic treatment, purified waste water flows around the filter cartridge from below to the surface of the filters.

In the biological filters are used loosely laid differently shaped cylindrical or tubular formations. For example, in Czechoslovak. U.S. Patent No. 5,768,516; 184.337 A filling consisting of 34 mm diameter pipes with 38 mm PVC length with corrugated walls is described.

Filter cartridges consisting of vertical plots, vertically laid tubes or other shapes creating a vertical clearance in the filter are less suitable for a shorter residence time of the waste water on the filter material and the possibility of droplets passing through the interspace without touching the biomass. This type of filter cartridge includes, for example, a filter cartridge according to the invention, which is formed by PVC plates interconnected into blocks by means of spacers and pins.

It is also known a number of spatially designed filter cartridges in which wastewater flows through various created areas &

and channels. Their disadvantage is that the waste water does not flow all over the flat, or falls on the areas facing away.

356,022 /.

The disadvantages of the above-described airless cartridges are eliminated by the cartridge for aerobic and anaerobic biological filters for the purification of waste widows and for cooling towers for cooling liquids according to the invention. The filler consists of at least one valid polymeric polymer material optionally provided with apertures for joining the individual plates into blocks.

The invention is further characterized in that the plate is further provided with horizontally positioned frustoconical protrusions with a circular or elliptical cross-section or a frustoconical shape with a flat closed cross-section. The individual projections are located on the plate in the horizontal direction at an axial distance of 30 to 130 mm and in the vertical direction at an axial distance of 30 to 120 mm. Each additional horizontal row of projections is offset by 1/2 axial distance from the previous row. If there are more plates, the distance between them is 10 60 60 mm.

It is preferred that all or part of the surface is roughened. The roughening of the surface allows better attachment of the biological membrane.

The individual plates can be joined by gluing or only by inserting the protrusions of one plate into the holes of the other plate. Such an arrangement increases the spatial stability of the cartridge, allows systematic irrigation of the maximum filter cartridge area, creates good conditions for attaching the biomass to the filter material, and optimizes the contact time of the wastewater and biomass waste. The cartridge of the invention allows water to flow continuously, without short-circuiting, or areal concentration, in successive stages from the upper row of protrusions to the underlying protrusions, while alternating the laminar and turbulent effluent flow. Its static solution allows easy assembly and loading when placed in the filter housing and including water and biomass.

The number of plates in the cartridge is determined by the shape of the filter body, and the number of interconnected plates into the blocks is selected so as to be easy to handle.

The dimensions of the projections determine in detail the technical possibilities of the material used and the production equipment.

Valid can be made of inert polymeric materials or other machinable materials ·

Illustrative examples. · Fig. 1 is a view and Fig. 2 is a section AA valid with the truncated conical projections of a circular cross-section Fig. 3 is a view and Fig. 4 is a section B-B with a projection with semicircular cross-section. These examples do not limit the scope of the invention.

Example 1

In a biological filter of 0.60 x 0.60 x 4.0 m, a set of 24 plates 1 of inert polymeric material of 0.90 x 0.60 m are bonded together to each other. truncated cone-shaped starting from 0.025 m basic and are positioned horizontally at an axial distance of 0.040 m ·

Sewage after primary sedimentation with contamination 120 - 210.0 mgO ^ l * ¹ according to BOD ₅ · * 3 ** li

At a hydraulic volumetric load of 5.0 m _e m · <3, the cleaning effect of the sedimented sample was 87-91% ·

A cleaning effect of 81-88% was achieved with a hydraulic filter volume of 10.0 m ^ om ~ ^ _e d * ^ ·

Example 2

The test biological filter consists of one plate (1) of an inert polymer mass of 0.30 x 2.40 m, with protrusions in the shape of horizontally cut half-cones with a flat top surface ·

The dimensions of the projections are 0.025 m at the base and 0.022 m at the top · They are located in the horizontal direction at an axis distance of 0.045 m and in the vertical direction at an axis distance of 0.040 m ·

Sewage was fed to the experimental biological filter after primary sedimentation with a contamination of 120-170 mgOgol BOD ^ * * 3 * 3 * 1

With a hydraulic volume load of 5 m • m '' d '' ^{, J} 'a cleaning effect of 88-94% was achieved ·

Claims (2)

OBJECT OF THE INVENTION Cartridge for aerobic and anaerobic biological filters for the purification of waste water and for cooling towers for cooling liquids, consisting of at least one valid polymeric inert material, optionally with apertures for joining individual plates into blocks, characterized in that the plate (1) is further provided with horizontally placed truncated cone-shaped projections (2) with a circular or elliptical cross-section or truncated formation with a flat closed cross-section, the individual projections (2) being arranged horizontally on the plate (1) at an axial distance © d 30 130 mm and in the vertical direction at an axial distance of 30 to 120 mm, with each additional horizontal row of projections (2) being offset by 1/2 axial distance from the previous row and, if plate (1) more, the distance between them 10 to 60 mm. Cartridge according to claim 1, characterized in that all or part of the valid surface is preferably roughened.