CS254859B1 - Sewerage with waste waters circulation - Google Patents

Abstract

Sewerage with pre-cleaned circulation sewage treatment of liquid transport sewage with solid particles. A waste water circulation system is suitable for small settlements with low sprawl on where there are small effluent flows due to inequality of inflow and relative large drainage profiles prescribed by the standard. This system can also be used for stables for hydraulic removal of cattle feces into storage tanks. For water circulation sewage water used for settling is used tank or settling tank a. they are transported by circulation or by gravity pipelines to the initial shafts. Shafts they can also be accumulated for shock flow in the form of a wave. This makes the amount of waste waters. Because they have waste water relatively large contact area between air and wastewater and near constant temperature, aerobic pretreatment occurs in the sewer sewage treatment.

Description

The subject of the invention is a sewage system with waste water circulation.

So far, sewerage has been used to drain sewage and rainwater either through a single or split sewer network. In a single sewer, both sewage and rainwater are drained together, in the case of separate sewerage, sewage water and rainwater separately.

Both unified and separated sewerage systems were not solved from the point of view of transport of non-homogeneous waste water with minimal or almost zero outflows so that waste water with feces or solid particles reaches the waste water treatment plant as soon as possible.

Sewage runoffs vary from zero to maximum during the day, while the unevenness of drainage and unit training varies widely.

Drainage of small settlements with low and sparse built-up areas with minimal or opposite slope of the terrain was difficult to solve. Such overflows are solved by pumping individual sections.

We know from practice that in all initial sewer sections (mainly low and sparse built-up areas) solid feces remain motionless, because they lack the driving water and power and reach the wastewater treatment plant mostly in the evening when housing development the largest water drawdown, which is the consequence of bathing residents and tír 2 the largest flow of sewerage in a rotten state. In the morning there is a maximum contamination of feces at min. water flow.

With the length of the sewer towards the wastewater treatment plant, the number of connected inhabitants to the sewerage system increases and thus the amount of wastewater flowing out is also proportional. Mainly the initial sewerage sections have a dry sewer where accumulated waste can also cause sewer clogging.

The invention removes this drawback without increasing the amount of waste water by returning the waste water downstream of the settling tank 5 or the settling tank 7 from the sewage treatment plant 3 via pressure or non-pressurized circulation pipes 2 to the beginning of the sewer network 7 into the initial wells 4.

This creates a stream of water in the sewage system, which favorably affects the transport capability of the sewage system and the pre-treatment of the wastewater in an aerobic manner, since there is a relatively large contact area between the wastewater and the air still in the sewerage.

The circulation may be continuous or intermittent, with normal or accumulation initial shafts 4 (to improve the transport properties of the water wave) so as to operate at a minimum cost and with a maximum transport and cleaning effect.

An exemplary embodiment of the invention is shown in the drawing.

Giant. 1 shows a sewage network of conventional design 2 with initial shafts 4 through a circulation pipe 2 corresponding to the most suitable recirculation for both hydraulic and waste water treatment with a waste water treatment plant 2.

FIG. 2 shows the consumption of water in the sewage treatment plant 2 »l ^ ^e i is the bilge sewer SIE recirculation line 2, a settling tank 5, two of the biological treatment plant, 7_ feeding tank 10 of the circulation pump wastewater from alternative 8 ^and withdrawal of circulation water behind tanks. Purified waste water flows through line 11 to the recipient.

This system ensures not only the transport hydraulics of the network, but also the pre-cleaning or cleaning aerobic effect, because in the sewer there is a sufficient contact area between waste water and air at an almost constant ambient temperature. This uses the existing network to pre-treat or treat wastewater.

Claims (1)

OBJECT OF THE INVENTION Sewage circulation system characterized in that it consists of a sewage system (1) and a circulation pipe (2) with a pumping station (10) for conveying the purified water to the initial shafts (4) with the collection of the circulation water either behind the settling tank (5) or. final sedimentation tank (7).