Sludge treatment system for improving road greening soil

Abstract

The utility model discloses a sludge treatment system for improving road greening soil, belongs to the field of sludge treatment, and solves the problem of how to use sludge for improving the road greening soil. A fermentation pit is dug in an isolation belt, a first cushion layer is arranged at the bottom of the fermentation pit, first impermeable films are laid on the top of the first cushion layer and the inner side wall of the fermentation pit, a heightening pool wall is detachably installed at the upper end of the side wall of the fermentation pit, the periphery of the heightening pool wall is enclosed to form a heightening space, and sludge to be fermented is filled in the fermentation pit and the heightening space. A first mulching film is laid on the top of the to-be-fermented sludge; a landfill pit is dug in the green belt, a second cushion layer is arranged at the bottom of the landfill pit, second impermeable films are laid on the top of the second cushion layer and the inner side wall of the landfill pit, and fermented sludge from the heightened space is filled in the landfill pit. The structure of the road is fully utilized, factory building is avoided during open-air operation, fermented sludge is utilized on site, and the dual purposes of sludge treatment and fertilizer resource utilization are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of sludge treatment technology, specifically relating to a sludge treatment system for improving roadside greening soil. Background Technology

[0002] With rapid urbanization, the number and scale of urban wastewater treatment plants are constantly increasing. However, the concept of "emphasizing water over sludge" has long existed in the wastewater treatment process, and the final disposal of wastewater treatment plant sludge has not been properly resolved. In urban domestic wastewater treatment, most of the nitrogen, phosphorus, and other elements contained in the influent are transferred to the sludge during the treatment process. It also contains small amounts of trace elements, which can be used as fertilizer for crops to increase agricultural yields. In other words, sludge is a high-quality organic fertilizer. Compared with farmyard manure, sludge is easier to decompose and has a better effect on improving soil fertility. This can not only help solve the final disposal problem of sludge but also promote plant growth, increase the greening rate, and improve the land. Utility Model Content

[0003] The purpose of this invention is to provide a sludge treatment system for improving roadside greening soil, in order to solve the problem of how to use sludge to improve roadside greening soil.

[0004] The technical solution of this utility model is: a sludge treatment system for improving road greening soil, wherein a fermentation pit is excavated in the road median strip, a first cushion layer is provided at the bottom of the fermentation pit, a first impermeable membrane is laid on the top of the first cushion layer and the inner side wall of the fermentation pit, a raised pool wall is detachably installed on the upper end of the side wall of the fermentation pit, the raised pool wall is surrounded to form a raised space, sludge to be fermented is buried in the fermentation pit and the raised space, and a first ground film is laid on top of the sludge to be fermented;

[0005] A landfill pit was excavated in the road green belt. A second cushion layer was installed at the bottom of the landfill pit. A second impermeable membrane was laid on the top of the second cushion layer and the inner wall of the landfill pit. Fermented sludge from the raised space was buried in the landfill pit.

[0006] As a further improvement of this utility model, it also includes an air supply mechanism, which includes an aerator, a connecting pipe and multiple aeration pipes. The connecting pipe is connected to the output end of the aerator and buried in the fermentation pit and the raised space. The multiple aeration pipes are buried at different heights in the fermentation pit and the raised space. The aeration pipes are connected to the connecting pipe and have multiple aeration holes.

[0007] As a further improvement of this utility model, it also includes a deodorization mechanism, which includes an odor pipe, a deodorization device and an outlet pipe connected in sequence. The odor pipe passes through the first ground membrane and is installed at the top of the raised space.

[0008] The beneficial effects of this utility model are as follows: This utility model fully utilizes the road's inherent structure, excavating fermentation pits and landfill pits in the road median and green belt respectively. A raised space is created above the fermentation pits, allowing sludge fermentation within both the pits and the raised space. The fermented sludge is then transferred to the landfill pit, and the raised pit walls are removed. Plants can then be planted simultaneously in both the fermentation and landfill pits, completing the road greening. This utility model operates outdoors, avoiding the need for factory construction. The fermented sludge is utilized on-site, reducing operating costs and effectively minimizing construction investment. The fermented sludge is directly used as fertilizer for afforestation, achieving the dual purpose of sludge treatment and fertilizer resource utilization. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the layout of the fermentation pit and landfill pit in this utility model;

[0010] Figure 2 This is a schematic diagram of the fermentation pit in this utility model.

[0011] In the diagram: 101-Aerator; 102-Connecting pipe; 103-Aeration pipe; 2-Fermentation pit; 200-First bedding layer; 201-First geomembrane; 202-Raising tank wall; 203-Raising space; 204-First ground film; 301-Odor pipe; 302-Deodorization device; 303-Air outlet pipe; 4-Landfill pit; 400-Second bedding layer; 401-Second geomembrane. Detailed Implementation

[0012] The present invention will now be described in detail with reference to the accompanying drawings.

[0013] like Figure 1 , Figure 2 As shown, a sludge treatment system for improving road greening soil includes a fermentation pit 2 excavated in the road median strip. A first cushion layer 200 is provided at the bottom of the fermentation pit 2. A first impermeable membrane 201 is laid on the top of the first cushion layer 200 and the inner sidewall of the fermentation pit 2. An elevation pool wall 202 is detachably installed on the upper end of the sidewall of the fermentation pit 2. The elevation pool wall 202 is surrounded to form an elevation space 203. Sludge to be fermented is buried in the fermentation pit 2 and the elevation space 203. A first ground film 204 is laid on top of the sludge to be fermented.

[0014] A landfill pit 4 is excavated in the road green belt. A second cushion layer 400 is provided at the bottom of the landfill pit 4. A second impermeable membrane 401 is laid on the top of the second cushion layer 400 and the inner wall of the landfill pit 4. Fermented sludge from the raised space is buried in the landfill pit 4.

[0015] It also includes an air supply mechanism, which includes an aerator 101, a connecting pipe 102 and multiple aeration pipes 103. The connecting pipe 102 is connected to the output end of the aerator 101 and is buried in the fermentation pit 2 and the raised space 203. The multiple aeration pipes 103 are buried at different heights in the fermentation pit 2 and the raised space 203. The aeration pipes 103 are connected to the connecting pipe 102 and have multiple aeration holes.

[0016] It also includes a deodorization mechanism, which includes an odor pipe 301, a deodorization device 302 and an outlet pipe 303 connected in sequence. The odor pipe 301 passes through the first ground film 204 and is installed at the top of the raised space 203.

[0017] Both fermentation pit 2 and landfill pit 4 are rectangular pits.

[0018] The implementation method is as follows:

[0019] S1. Excavate fermentation pit 2 in the road median strip to a depth of 1.5m; construct the first cushion layer 200 at the bottom of fermentation pit 2, lay the first impermeable membrane 201 on the top of the first cushion layer 200 and the inner sidewall of fermentation pit 2, install the raised pool wall 202 at the upper end of the sidewall of fermentation pit 2 to form a raised space 203, the total height of the raised pool wall 202 is 3m, the height above ground is 1.5m, and the depth of installation underground is 1.5m; arrange the gas supply mechanism.

[0020] S2. Fill the fermentation pit 2 and the raised space 203 with the sludge to be fermented, lay the first mulch film 204 (agricultural mulch film) on top of the sludge to be fermented, and set up a deodorizing machine.

[0021] S3, continued fermentation;

[0022] S4. Excavate a landfill pit 4 in the road green belt with a depth of 1.5m; construct a second sub-layer 400 at the bottom of the landfill pit 4, and lay a second impermeable membrane 401 on the top of the second sub-layer 400 and the inner sidewall of the landfill pit 4.

[0023] S5. Lift the first mulch film 204, transfer the fermented sludge in the raised space 203 to the landfill pit 4, and remove the raised pool wall 202.

[0024] S6. Lay the first mulch film 204 on the top of the landfill pit 4 and plant plants; lay the second mulch film (agricultural mulch film) on the top of the fermentation pit 2 and plant plants.

[0025] The sludge to be fermented is the sludge that has been treated at the sewage treatment plant. It can be mixed with auxiliary materials and then filled into the sludge fermentation pit for fermentation to improve the fermentation speed.

[0026] Sludge from urban wastewater treatment plants has strong viscosity and good water retention. By using composted and fermented sludge for roadside greening soil improvement, the amount of nutrients such as nitrogen and phosphorus in the soil is increased, allowing the soil to retain nutrients for a longer period of time, providing organic matter for the growth of grass and trees, which is beneficial to plant growth.

[0027] This invention utilizes road dividers for sludge fermentation for resource utilization. The fermented sludge is used on-site as fertilizer for afforestation, reducing operating costs and effectively minimizing construction investment. It achieves the dual goals of sludge treatment and fertilizer resource utilization.

Claims

1. A sludge disposal system for improving road greenery soil, characterized by: The fermentation pit (2) is excavated in the road isolation belt, the first cushion layer (200) is arranged at the bottom of the fermentation pit (2), the first impermeable membrane (201) is arranged on the top of the first cushion layer (200) and the inner side wall of the fermentation pit (2), the heightening pool wall (202) is detachably installed on the upper end of the side wall of the fermentation pit (2), the heightening space (203) is formed around the heightening pool wall (202), the sludge to be fermented is filled in the fermentation pit (2) and the heightening space (203), and the first mulching film (204) is arranged on the top of the sludge to be fermented. The landfill pit (4) is excavated in the road green belt, the second cushion layer (400) is arranged at the bottom of the landfill pit (4), the second impermeable membrane (401) is arranged on the top of the second cushion layer (400) and the inner side wall of the landfill pit (4), and the sludge fermented from the heightening space is filled in the landfill pit (4).

2. A sludge disposal system for the improvement of road greenery soil according to claim 1, characterized in that: The air supply mechanism includes the aerator (101), the connecting pipe (102) and the plurality of aeration pipes (103), the connecting pipe (102) is connected to the output end of the aerator (101) and is buried in the fermentation pit (2) and the heightening space (203), the plurality of aeration pipes (103) are buried at different height positions in the fermentation pit (2) and the heightening space (203), the aeration pipe (103) is in communication with the connecting pipe (102), and the aeration pipe (103) is provided with the plurality of aeration holes.

3. A sludge disposal system for the improvement of road greenery soil according to claim 1 or 2, characterized in that: The deodorization mechanism includes the odor pipe (301), the deodorization device (302) and the air outlet pipe (303) which are connected in sequence, the odor pipe (301) penetrates through the first mulching film (204) and is installed on the top of the heightening space (203).

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