HUT56219A - Treating plant for thin wastes particularly thin manures - Google Patents

Abstract

Field of the Invention The present invention relates to a treatment facility for dilute wastes, in particular slurry, which has a soil pool receiving the slurry to be treated. It is an object of the present invention that the ground basin (1) has a filter field (2) delimited by a geogrid (3), at least 0.7 Au, measured at a depth of 0.8 to 1.5 m (B) from the basin level. ^) a series of perforated drainage pipes (6) arranged in the ground, their outlet ends in the collecting channel (7) of the filtered liquid phase, and the ground pool (1) is connected via a slurry pump (8) preferably with a slurry pump (8). ). figure).

Description

The present invention relates to a treatment plant for the treatment of slurry, such as slurry, leachate and similar dilute by-products from livestock farms and other non-hazardous waste.

As is well-known, one of the key issues in environmental protection is that slurry from livestock farms and contaminated leachate still contaminate the environment in many places and cause the desertification of valuable areas.

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- 2 At present, treatment plants with a relatively small reservoir ground basin adjacent to the animal farm are widely used for the treatment of slurry. The liquid phase of the slurry applied to the earth basin leaks down through the pores of the soil and the solid phase remains in the earth basin.

The main disadvantage of the above treatment plant is, according to practical experience, that due to the increasing thickness of the solid bed, the soil loses its leaching properties in a relatively short time (up to one and a half years), which makes it unsuitable for further slurry treatment.

Various wastewater treatment plants are also known, which are essentially complex and expensive to treat slurry with industrial treatment technology. Their widespread use in addition to livestock farms is currently unrealistic due to the relatively high investment and operational costs, energy and labor requirements.

It is an object of the present invention to overcome the above shortcomings by providing a relatively simple, inexpensive and long-life solution for efficient and economical management of dilute waste, especially slurry, with reduced input and minimal labor.

In order to accomplish this object, we have started from the treatment plant mentioned in the introduction, which has at least one ground basin for receiving the slurry to be treated. It is an improvement of the present invention that the earth basin is formed as a filter field delimited by a geological barrier having a series of perforated drainage pipes at least 0.7, preferably 0.8 to 1.5 m, measured from the plane of the pool floor, the outlet ends of which pass into the collecting channel of the filtered liquid phase, and the earth basin is connected to the slurry manhole via a pipe equipped with a slurry pump tu-Λ-π ' collecting duct. This can further reduce space requirements and costs.

Preferably, the filter field of each ground basin is selected for an area of at least one hectare, and the circumferential barrier is between 50 and 80 cm in height from the ground level of the filter field and has a crown width of 2.5 to 3.0 m.

Preferably, the perforated drainage pipes are 6.0 to 7.0, preferably

6.5 cm in diameter, 0.8-1.2 mm in wall thickness, larynx-like, preferably made of hard PVC, preferably with the smallest diameter of the perforation.

Preferably, the collecting channel of the filtered liquid phase is connected to a collecting channel, which can be connected to the discharge channel via a pipeline fitted with a pump.

The invention will now be described in more detail with reference to the accompanying drawings, in which an exemplary embodiment of the present invention is illustrated. In the drawing:

Figure 1 is a schematic diagram of a preferred embodiment of a treatment station according to the invention.

- a sketch of 4 vertical sections;

Figure 2 is a relatively larger cross-sectional view of a detail of the solution of Figure 1, namely a portion of a drainage pipe used.

As shown in Fig. 1, in the present case an exemplary treatment plant for the treatment of pig slurry has two ground pools 1 which are spaced apart. The filter field of the ground pools 1 is designated by 2, which is delimited by the surrounding earth dam 3. In the present case, the filter fields 2 are substantially square in shape and have an area of approx. 1 hectare. The earth dams 3 are designed as well-known earth embankments, the height of which, Bg, measured from the ground level in this case, has been selected as an average of 0.6-0.8 m. Furthermore, the 3 earth dams have a crown width of 3.0 meters in the example and a slope of 1: 1.5. With such a construction of the earth dams, it is possible for the machines to pass through them for purposes to be described later.

In Fig. 1, 4 is the slurry manhole into which the 5 slurry of slurry directly coming from the barn flows. It should be noted here that the treatment plant of the present invention should preferably be located as close as possible to the animal farm, which is, of course, determined by the environmental options.

According to the invention, a series of drainage pipes 6 perforated into the soil are laid below the filter field 2, the depth of the filter field 2 being at least 0.7 but preferably between 0.8 and 1.5 m. According to the invention, the outlet ends of the drain pipes 6 extend into the collecting channel 7 of the filtered liquid phase. In the illustrated case, the two ground basins 1, i.e. the filter fields 2, of the treatment plant according to the invention can be operated alternately and there is a common collecting channel 7 located between them. In the present case, the sealing of the outlet ends of the drain pipes 6 is arranged to be preferably 40 to 50 cm above the liquid level in the collecting channel 7. Obviously, the drainage pipes 6 descend towards the collecting channel 7, which slope was chosen to be 4% in our experiments.

According to the invention, the groundwater reservoir 1 is connected to the manure collecting pit 4. Since in the present case the groundwater basins are located in a flat area and gravity transfer is not possible (such as in hilly areas), in the present case a slurry pump 8 is arranged in the manhole 4, which manages the slurry 9 through 9g and 9g branches. from the 4 manholes to one of the ground basins ^ 1. The outlet ends of the branches 9g and 9g are provided with a valve 10 each. As shown in Figure 1, the pipeline 9 is provided with an additional valve 11 for sealing the valve. Furthermore, a mixing line 12 is branched out of the pipeline 9 via a valve 13 which is intended to homogenize the slurry in the manhole 4. To do this, of course, the valve 11 must be closed and the valve 13 opened.

According to Fig. 1, in the present case the manhole 4 is provided with an electrical level sensor unit 14, which is in control connection with the power circuit of the slurry pump 8.

In Figure 1, it is only schematically indicated that the collecting channel 7 of the filtered liquid phase is connected to the collecting channel 16 in the present case via suction 15. So the 16 manholes are • · · • ·

- 6 for collecting the filtered liquid phase. A pump 17, known per se, is installed in the manhole 16 with a conduit 18 connected to the discharge port. The outlet end of the conduit 18 extends into a discharge conduit 19, which in this case is the operating conduit itself.

In the present case, the manhole 16 is provided with units for measuring the level of the lower and jitter, s s ő ^ eng eng edett meg z ^ z z z g z z z z z z z z z z z z z z z érzék érzék érzék z érzék zz érzékH 7H gH.

In Figure 2, the drain pipe 6 is a preferred example. is an enlarged detail of an embodiment thereof. In the present case, the diameter D of the drainage pipe 6 was chosen to be 6.5 cm and the wall thickness (v) to 1.0 mm, and the pipe itself was made as a rigid tubular tubular tubular tube. at the smallest internal diameter, i.e. in the valleys, made circumferentially, where each opening has a size of approx. It was 1mm. Experimental experience has shown that this corrugated laryngeal-like wall design provides high strength at a relatively low wall thickness and a turbulent current component in the drain tube 6 flowing in the direction of the arrow Y23 to minimize the risk of sludge leakage.

Thus, according to the invention, the filter field 2, i.e. the soil itself, is used for phase separation and for filtering the liquid phase to such an extent that it is no longer contaminated. Furthermore, the use of the drainage pipes 6 ensures that the filter field 2 can, on the one hand, retain its more intense leakage properties for a long time and, on the other hand, eliminate the risk of contamination of groundwater, thereby providing an environmentally friendly solution.

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Thus, the embodiment of the treatment plant according to the invention is illustrated in the following embodiment:

The slurry pump 8 start-up of solenoid valve 11 is open, the slurry is filled in Figure 1 the left one ground tank through _the taps of the ninth In the filter field 2, the slurry flows continuously down through the gravitational pore volume of the soil and the filtered liquid phase is collected by the drainage pipes 6. The solid phase remains in the ground bed. In this case, the drainage pipes 6 are arranged parallel to each other and depending on the quality of the soil at intervals of 2-5 m. The depth of the drainage pipes 6 also influences the quality of the soil, since this must obviously be smaller than knitted soils and larger than looser soils. It should also be noted that, according to our experimental experience, the drainage pipes 6 do not require any separate filter layer, they can be laid directly in the soil.

Through the drainage pipes 6, the filtered liquid phase enters the collecting channel 7, from there to the collecting shaft 16 and then, via the operation of the pump 17, to the discharge channel 19.

As mentioned above, the slurries operate alternately, i.e. in the present case the slurry is treated up to a maximum of 35 cm thick in the left 1 / solid phase basin of Figure 1. Thereafter, the left ground basin 1 is dried, the solid phase collected in it is recovered, and after one or two years, it is regenerated by intensive plant cultivation and then put back into operation. Thus, the normal operating time is estimated to be 6-8 years if the daily amount of slurry is 300 m and the solid phase content of the slurry is 3%.

After bypassing the left 1 ground pool, of course, the following is not the case: · · · · · · · · · · · · · · · · · · · · · · · · · ·

- We operate 8 right-handed ground basin, which is a

9 _the valve 10 of _the branch 9 is closed, but the valve 10 of the branch 9g is opened.

The dried solid phase is extracted from the left ground bed 1 with a dozer, for example, and deposited next to the earth bed 3 and then as fertilizer. shipped for use. Dozers and transport vehicles can travel on the 3 earth barriers themselves. Afterwards, it is advisable to plow the filter field 2 thoroughly and then to treat it with lime after working the soil. After the lime disc has been worked in, it is expedient to sow the filter field 2 with a fodder plant which has a deep root system and is capable of absorbing large amounts of nutrients, for example silage maize. Thus, on the one hand, the land can be used for crop production in the bypassed time interval, and on the other hand, the filtering capacity of the soil of the filter field 2 is restored, i.e., it is restored to a level very close to its original state.

The following aspects should be considered when pre-dimensioning the treatment plant of the present invention:

- Preliminary soil testing should be used to determine the water conductivity of the soil and to determine the amount of daily water movement (m / day). The depth can thus be determined and the time taken for the freshly fed slurry to reach the collecting channel 7 can be calculated;

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- Knowing the daily amount of slurry (m / day), it is possible to determine the thickness of the slurry over which the slurry is covered over the time calculated above;

• · ······································································································································································································································· We are not sure if this is the case, we are not sure.

- From the composition of the slurry the proportion of the solid phase per day or per year can be predefined;

In view of the above, it is possible to calculate the amount of slurry that can be applied per hectare by assuming a maximum average thickness of 0.35 m for the solid phase and determining the required area of the filter field.

The main advantages of the present invention are:

The treatment plant according to the invention can be connected to a generally existing manure pit

- The treatment plant requires relatively little space

Installation costs are low, it is also mainly well-mechanized earthworks

- Groundwater Represents * & machine equipment completely eliminates contamination, OL.

making it an 'environmentally friendly' solution *

- Operations Only laborious and energy efficient, flat terrain only requires fluid transfer.

The operation of the pumps can be easily automated by requiring only supervision by the personnel.

- It utilizes the natural filtration capacity of the soil for phase decomposition and water filtration. By rotating, the filtering capacity of the soil is maintained.

Finally, it is noted that the wires 9 of the Wire 9) are preferably run below the freezing point. It is also noted that if the treatment plant of the present invention is installed in a hilly region, the fluid transfer may be by gravity, whereby the slurry pump 8 and the pump 17 may be missed. In cases of application where

Further purification of the filtered fluid entering the collecting duct 10 and the collecting duct 16 due to the more stringent requirements may be achieved, and further purification steps may be included, which may include, for example, granular zeolite passage. In this way, the liquid can be further purified and thus carried, e.g. into the operating sewer. The granular zeolite used for such post-purification e.g. can be regenerated by occasional compressor blowing.

Treatment plant for slurry wastes, in particular slurry, having a slurry receiving the slurry to be treated, characterized in that the slurry (1) has a filter field (2) delimited by an earth barrier (3)

Claims (5)

The patent claims preferably have at least 0 series in the soil, measured from the ground level of the basin, their outlet ends flowing into the filtration channel (7) of the filtered liquid phase and the slurry (1) with the manure (4) - preferably is connected. Treatment plant according to Claim 1, characterized in that it has two earth basins (1) which can be operated alternately, between which is a common collecting channel (7) for the filtered liquid phase. 3. The treatment station according to claim 1.0 or 2, characterized in that the filter field (2) of the ground basin (1) has an area of at least 1 hectare, and the height (B £) of the surrounding geological barrier (3) is between and the crown width (A) is preferably 2.5 to 3.0 m. 4. Treatment plant according to one of claims 1 to 3, characterized in that the drain pipe (6) is 6.0 to 7.0, in particular a hard PVC pipe. 5. Treatment plant according to one of claims 1 to 3, characterized in that the filtered liquid phase collecting channel (7) is connected to a collecting shaft (16), which in turn is preferably connected to the discharge channel (19) via a conduit (18) fitted with a pump.