Lake sediment in-situ degradation process system

Abstract

The utility model provides an in-situ degradation process system for lake bottom mud, which constructs an integrated system of a water inlet pump, a plurality of groups of release units and a microbial carrier which are arranged underwater in a lake, and an ultra-nano gas dissolving and reoxygenation system and a dosing device which are arranged on water in the lake, so that the bottom mud and a water body cannot be disturbed; the phenomenon of short-term water quality deterioration is avoided, the living environment of benthic animals and plants can be improved, and the virtuous cycle of water and bottom mud substance-energy is accelerated. The process system can strengthen aerobic indigenous microorganisms to degrade organic nutrients, especially nitrogen and phosphorus, in the bottom mud in an oxygen-enriched environment, and the problem of secondary pollution caused by subsequent bottom mud treatment in traditional desilting is avoided. The technical problems that short-term water quality deterioration exists in traditional endogenous pollution treatment, the living environment of an original biological library and aquatic animals and plants at the lake bottom is damaged, secondary pollution is caused by subsequent bottom mud treatment, investment is high and the like are effectively solved, and the lake water quality improvement process is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of water pollution restoration, in particular to an in-situ degradation process system for lake bottom mud. Background Art

[0002] There are two main sources of endogenous pollution in rivers and lakes: one is the deposition of aquatic animal feces and animal and plant remains at the bottom; the other is the ditch sludge that is flushed into rivers and lakes through sewage outlets. Over time, sediment with high organic matter content is formed. The pollutants in the sediment will be released into the water body for a long time, increasing the pollution load in the water layer. When these pollutants exceed the amount that the water body's self-purification capacity (including the discharge volume) can consume, the water quality will deteriorate.

[0003] The common treatment method for endogenous pollution control is ex situ treatment. Ex situ treatment is mainly achieved through dredging. Although dredging can quickly remove sediment pollutants, it will cause the water quality of the river to deteriorate in the short term. In addition, dredging also has the problems of high investment, difficult sediment disposal, and destruction of the original biological reservoir at the bottom of the lake and the living environment of aquatic plants and animals.

[0004] The utility model patent with the publication number CN210595715U provides a composite microbial full-interface ecological oxygen enrichment restoration system. It uses an oxygen enrichment device to pump water from the downstream of the water body into the dissolved oxygen cone, where oxygen and water are mixed. The water dissolved with oxygen enters the outlet pipe through the outlet of the dissolved oxygen cone, and then is discharged to the upstream of the water body; at the same time, the dosing device injects a variety of microorganisms from the dosing pump into the outlet pipe, and then mixes them with the oxygenated water in the drainage pipe, and discharges them together to the upstream of the water body. The mixed water is discharged to the downstream end of the water body again under the action of plug flow, and is pumped up to the dissolved oxygen cone again by the pump. The above process is continuously repeated to cyclically enrich the water body with oxygen and add microorganisms that decompose harmful substances.

[0005] However, the above system has the following technical problems: ① most of the chemicals dissolved in the water are washed downstream with the water flow, and the residence time is insufficient to achieve the desired effect; ② the oxygen-enriched water enters the receiving water body, the bubbles are large and easily overflow the water surface, and the oxygen utilization rate is low.

[0006] In view of this, it is necessary to design an improved in-situ degradation process system for lake sediments. Based on the technical defects existing in the treatment of the above-mentioned endogenous pollution, it aims to solve the problems existing in the traditional endogenous pollution treatment, such as short-term water quality deterioration, destruction of the original biological reservoir at the bottom of the lake and the living environment of aquatic plants and animals, secondary pollution caused by subsequent sediment disposal, high investment, etc., so as to accelerate the process of improving the quality of lake water. Utility Model Content

[0007] The utility model aims to provide an in-situ degradation process system for lake sediment.

[0008] In order to achieve the above-mentioned utility model purpose, the utility model provides a lake sediment in-situ degradation process system, which includes a water inlet pump arranged under the lake water, a plurality of release units, a microbial carrier, and an ultra-nano aerosol reoxygenation system and a dosing device arranged above the lake water;

[0009] The water inlet and outlet of the ultra-nano aerosol reoxygenation system are respectively connected to a water inlet pump and a plurality of groups of release unit pipelines for raw water inlet and oxygen-enriched water outlet;

[0010] The ultra-nano aerosol reoxygenation system and the dosing device are arranged adjacent to each other; the drug outlet of the dosing device is connected to the water outlet pipeline of the ultra-nano aerosol reoxygenation system for mixing the biological growth promoter with oxygen-enriched water.

[0011] As a further improvement of the utility model, the water inlet pump is arranged at a water depth of 1m upstream of the lake, and includes a water suction port and a water delivery port connected to the water inlet pipe of the ultra-nano aerosol reoxygenation system, for extracting raw water from the lake and delivering it to the ultra-nano aerosol reoxygenation system.

[0012] As a further improvement of the utility model, the water inlet pump is fixed in the lake water by means of steel pipe piling.

[0013] As a further improvement of the utility model, a plurality of groups of release units are regularly or irregularly arranged 0.3-0.5 m above the lake bottom mud, and the release units are restricted on the lake bed by steel pipe piling.

[0014] As a further improvement of the utility model, the microbial carrier is fixedly arranged above the lake bottom mud.

[0015] As a further improvement of the present invention, the microbial carrier has a specific surface area of ​​not less than 8000m 2 / m 3 Fine fiber bio-carrier.

[0016] As a further improvement of the present invention, the ultra-nano aerosol reoxygenation system includes an oxygen generator and is arranged on the shore of a lake.

[0017] As a further improvement of the present invention, the oxygen filling capacity of the oxygen generator is 10kg / h.

[0018] As a further improvement of the utility model, the microorganism carrier is confined to the lake bottom by being fixed on the threaded steel bar by tying a nylon rope.

[0019] As a further improvement of the utility model, the power of the water inlet pump is 2.2 kw.

[0020] The beneficial effects of the utility model are:

[0021] 1. The in-situ degradation process system of lake sediment provided by the utility model will not disturb the sediment and water body, not only will there be no short-term water quality deterioration, but it will also improve the living environment of benthic plants and animals, and accelerate the benign cycle of water body and sediment matter-energy. The process system can enhance aerobic indigenous microorganisms to degrade organic nutrients in the sediment, especially nitrogen and phosphorus, in an oxygen-rich environment, avoiding the secondary pollution problem caused by the subsequent sediment disposal after traditional dredging.

[0022] 2. The in-situ degradation process system for lake sediment provided by the utility model is constructed with an integrated system of a water inlet pump arranged under the lake water, a plurality of release units, a microbial carrier, an ultra-nano aerosol reoxygenation system and a dosing device arranged above the lake water, and the various mechanisms in the above-mentioned system are arranged at different positions of the lake water body, forming an in-situ degradation system with a water body circulation level, which effectively solves the technical problems existing in traditional endogenous pollution control, such as short-term water quality deterioration, destruction of the original biological reservoir at the bottom of the lake and the living environment of aquatic animals and plants, secondary pollution caused by subsequent sediment disposal, and high investment, and accelerates the process of improving the quality of lake water bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main view of the in-situ degradation process system of lake sediment provided by the utility model.

[0024] Figure 2 This is a plan view of the in-situ degradation process system of lake sediment provided by the utility model.

[0025] Reference numerals

[0026] 1-water inlet pump; 2-ultra-nano aerosol reoxygenation system; 3-drug dosing device; 4-release unit; 5-microorganism carrier. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0029] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0030] See also Figure 1 to Figure 2 As shown, the utility model provides an in-situ degradation process system for lake sediment, which includes a water intake pump 1 arranged under the lake water, a plurality of release units 4, a microbial carrier 5, and an ultra-nano aerosol reoxygenation system 2 and a dosing device 3 arranged above the lake water.

[0031] The water inlet and the water outlet of the ultra-nano aerosol reoxygenation system 2 are respectively connected to the water inlet pump 1 and a plurality of groups of release unit 4 pipelines for raw water inlet and oxygen-enriched water outlet.

[0032] See also Figure 1 As shown, the water inlet pump 1 is arranged at a water depth of 1 m upstream of the lake, and includes a water suction port and a water delivery port connected to the water inlet pipeline of the ultra-nano aerosol reoxygenation system 2, for extracting raw water from the lake and delivering it to the ultra-nano aerosol reoxygenation system 2.

[0033] In some specific implementations, the water intake pump 1 is fixed in the lake water by using steel pipe piling.

[0034] The power of the water inlet pump 1 is 2.2 kw.

[0035] See also Figure 1 As shown, several groups of release units 4 are arranged in a regular or irregular manner at 0.3-0.5 m above the lake bottom mud, and several groups of the release units 4 are fixed on the lake bed by steel pipe piling.

[0036] The microorganism carrier 5 is fixedly arranged above the lake bottom mud.

[0037] In some specific embodiments, the microorganism carrier 5 is fixed to the lake bottom by tying a nylon rope to a φ20mm threaded steel bar.

[0038] The microbial carrier is selected to have a specific surface area of ​​not less than 8000m 2 / m 3 The fine fiber biological carrier provides attachment points for the reproduction of indigenous microorganisms.

[0039] See also Figure 1 and Figure 2 As shown, the dosing device 3 is arranged on the shore of the lake and placed beside the ultra-nano gas-dissolved reoxygenation system 2. The ultra-nano gas-dissolved reoxygenation system 2 comprises an oxygen generator, and the oxygen supply capacity of the oxygen generator is 10 kg / h.

[0040] The ultra-nano aerosol reoxygenation system 2 and the dosing device 3 are arranged adjacent to each other; the dosing port of the dosing device 3 is connected to the water outlet pipe of the ultra-nano aerosol reoxygenation system 2, which is used to mix the biological growth promoter with the oxygen-rich water, add the biological growth promoter to the oxygen-rich water, and the oxygen-rich water mixed with the growth promoter is transported to the bottom water of the lake through several groups of release units 4, which can quickly activate the indigenous microorganisms in the bottom mud.

[0041] The lake sediment in-situ degradation process system provided by the utility model has the following working mechanism:

[0042] First, the water inlet pump 1 is arranged upstream of the lake water body to extract raw water from the lake to provide the ultra-nano aerosol reoxygenation system 2 (including an oxygen generator) with the amount of water required for dissolving oxygen. The ultra-nano aerosol reoxygenation system 2 (including an oxygen generator) is arranged on the shore of the lake to produce oxygen-rich water, and then the oxygen-rich water is piped to the release unit 4; the release unit 4 is arranged above the lake bottom mud to continuously provide supersaturated oxygen-rich water to the bottom water body.

[0043] At the same time, the dosing device 3 is arranged next to the ultra-nano aerosol reoxygenation system 2 (including the oxygen generator), and the biological growth promoter required to activate the indigenous microorganisms in the sediment is added to the oxygen-enriched water, so that the release unit 4 delivers oxygen-enriched water mixed with the biological growth promoter, which can quickly activate the indigenous microorganisms in the sediment. The microbial carrier 5 is arranged above the sediment to provide an attachment point for the reproduction of the activated indigenous microorganisms.

[0044] In summary, the utility model provides a lake sediment in-situ degradation process system, which constructs an integrated system of a water inlet pump arranged under the lake water, several groups of release units, microbial carriers, and an ultra-nano aerosol reoxygenation system and a dosing device arranged above the lake water. It will not cause disturbance to the sediment and water body, and will not only prevent the phenomenon of short-term water quality deterioration, but also improve the living environment of benthic animals and plants, and accelerate the benign cycle of water body and sediment matter-energy. The process system can enhance aerobic indigenous microorganisms to degrade organic nutrients in the sediment, especially nitrogen and phosphorus, in an oxygen-rich environment, avoiding the secondary pollution problem caused by the subsequent sediment disposal after traditional dredging. It effectively solves the technical problems of short-term water quality deterioration, destruction of the original biological reservoir at the bottom of the lake and the living environment of aquatic animals and plants, secondary pollution caused by subsequent sediment disposal, and high investment in traditional endogenous pollution control, and accelerates the process of improving the quality of lake water.

[0045] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A lake sediment in-situ degradation process system, characterized by: It includes a water inlet pump arranged under the lake water, several groups of release units, microbial carriers, and an ultra-nano aerosol reoxygenation system and a dosing device arranged above the lake water; The water inlet and outlet of the ultra-nano aerosol reoxygenation system are respectively connected to a water inlet pump and a plurality of groups of release unit pipelines for raw water inlet and oxygen-enriched water outlet; The ultra-nano aerosol reoxygenation system and the dosing device are arranged adjacent to each other; the drug outlet of the dosing device is connected to the water outlet pipeline of the ultra-nano aerosol reoxygenation system for mixing the biological growth promoter with oxygen-enriched water.

2. The in-situ degradation process system of lake sediment according to claim 1 is characterized in that: The water inlet pump is arranged at a water depth of 1m upstream of the lake, and comprises a water suction port and a water delivery port connected to the water inlet pipeline of the ultra-nano aerosol reoxygenation system, for extracting raw water from the lake and delivering it to the ultra-nano aerosol reoxygenation system.

3. A lake sediment in-situ degradation process system according to claim 2, characterized in that: The water inlet pump is fixed in the lake water by steel pipe piling.

4. The in-situ degradation process system for lake sediment according to claim 1 is characterized in that: Several groups of release units are regularly or irregularly arranged 0.3-0.5 m above the lake bottom mud, and the release units are restricted on the lake bed by steel pipe piling.

5. The in-situ degradation process system of lake sediment according to claim 1 is characterized in that: The microbial carrier is fixedly arranged above the lake bottom mud.

6. The in-situ degradation process system for lake sediment according to claim 1 is characterized in that: The microbial carrier has a specific surface area of ​​not less than 8000m 2 / m 3 Fine fiber bio-carrier.

7. The in-situ degradation process system for lake sediment according to claim 1 is characterized in that: The ultra-nano aerosol reoxygenation system comprises an oxygen generator and is arranged on the shore of a lake.

8. The in-situ degradation process system for lake sediment according to claim 7 is characterized in that: The oxygen filling capacity of the oxygen concentrator is 10kg / h.

9. The in-situ degradation process system for lake sediment according to claim 5 is characterized by: The microorganism carrier is fixed to the lake bottom by tying a nylon rope to a threaded steel bar.

10. The in-situ degradation process system of lake sediment according to claim 1 is characterized in that: The power of the water inlet pump is 2.2 kw.

Images