CN210620398U

CN210620398U - Biochemical repair system of normal position

Info

Publication number: CN210620398U
Application number: CN201921366392.8U
Authority: CN
Inventors: 张羽
Original assignee: Guangdong Ecologic Restoration And Technology Co ltd
Current assignee: Guangdong Ecologic Restoration And Technology Co ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-05-26
Anticipated expiration: 2029-08-21

Abstract

The utility model discloses an in-situ biochemical restoration system, which comprises an A2O oxidation ditch and an artificial aquatic weed biological zone which are sequentially arranged along the water flow direction, and microbial strains, plankton, algae, fishes and aquatic plants which are cultivated in the water body; the A2O oxidation ditch comprises an anaerobic zone, an anoxic zone, an aerobic zone and a sedimentation zone which are sequentially arranged along the water flow direction; the system has large sewage treatment capacity, good treatment effect and strong stability, and can effectively remove organic matters, nitrogen, phosphorus and other pollutants in sewage; the device is arranged at a black and odorous concentration point or a downstream area of a polluted water area, and is suitable for treating the water body of inferior V type.

Description

Biochemical repair system of normal position

Technical Field

The utility model relates to a sewage treatment technical field, in particular to biochemical repair system of normal position.

Background

Rivers and lakes are the important foundation for industrial and agricultural water and domestic water of urban and urban residents, and the water quality conditions of the rivers and lakes determine the quality of life and the sustainable development degree of people to a certain extent. With the rapid development of economy and the continuous improvement of the living quality of people, rivers and lakes are polluted in different degrees, and domestic sewage, industrial wastewater, farmland irrigation water containing pesticides and fertilizers and the like are discharged into the rivers and lakes in large quantities, so that harmful substances in water are obviously increased, and a water environment system is obviously changed. Water pollution is becoming a major problem to be solved urgently.

For the problem of water pollution, various technical methods are used at home and abroad to treat and improve the water environment, and the methods are mainly divided into a mechanical improvement method, a chemical restoration method and a biological treatment method. The mechanical improvement method mainly comprises the technologies of mechanical algae removal, water transfer dilution, independent aeration, river bottom sludge dredging and the like, and the aim of improving the river channel environment is fulfilled by manual measures; however, this method is large in work volume, expensive, and low in durability of treatment effect. The chemical remediation method is to utilize chemical reagents and medicines to carry out chemical reaction with pollutants or harmful elements in the river channel so as to achieve the purpose of precipitating or digesting the harmful substances; although the method is low in cost and quick in effect, the generated side effect is large, and the method needs to be continuously and repeatedly used. The biological treatment method mainly utilizes the functions of absorption, degradation and conversion of microorganisms to reduce the content and concentration of pollutants in the river water body; however, the method has poor treatment effect and needs continuous addition of microorganisms.

It is seen that improvements and enhancements to the prior art are needed.

SUMMERY OF THE UTILITY MODEL

In view of the defects of the prior art, the utility model aims to provide an in-situ biochemical repair system, which aims to solve the defect of sewage treatment in the prior art mentioned above, and directly treats sewage in river gush by applying the principle and the process of a sewage treatment plant. The A2O oxidation ditch is installed on site, and the polluted water and the polluted wastewater can be treated simultaneously without sewage interception, so that a large amount of pipe network cost and land occupation cost can be saved, the energy consumption of a lift pump in the ecological ectopic restoration method is avoided, and the functions of drainage and flood control of river gushing are not influenced.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an in-situ biochemical remediation system comprises an A2O oxidation ditch and an artificial aquatic plant biological zone which are sequentially arranged along the water flow direction, and microbial strains, plankton, algae, fishes and aquatic plants which are cultured in a water body; the A2O oxidation ditch comprises an anaerobic zone, an anoxic zone, an aerobic zone and a sedimentation zone which are sequentially arranged along the water flow direction.

In the in-situ biochemical remediation system, overflow dams are respectively arranged between the anaerobic zone and the anoxic zone and between the aerobic zone and the sedimentation zone.

In the in-situ biochemical remediation system, a geomembrane is arranged between the settling zone and the artificial aquatic plant biological zone.

In the in-situ biochemical remediation system, a garbage oil removal device and a plurality of first submersible propellers are arranged in the anaerobic zone.

In the in-situ biochemical remediation system, a plurality of stirrers are arranged in the anoxic zone, and the stirrers are respectively arranged on two bank sides of the water body close to the anaerobic zone or the aerobic zone.

In the in-situ biochemical remediation system, a micropore aeration device is arranged in the aerobic zone, a plurality of flow baffle plates are arranged along the flowing direction of the water body, and a second submersible propeller and a plurality of aeration pipes are respectively arranged between every two adjacent flow baffle plates.

In the in-situ biochemical remediation system, a sewage pump for pumping sewage to the anoxic zone is further arranged in the aerobic zone.

In the in-situ biochemical remediation system, a sludge pump for returning sludge to the anaerobic zone is arranged in the settling zone.

In the in-situ biochemical remediation system, the aquatic plants comprise emergent aquatic plants, floating plants and submerged plants.

Has the advantages that:

the utility model provides an in-situ biochemical remediation system, which organically combines an oxidation ditch with an ecological process, has large sewage treatment capacity, good treatment effect and strong stability, can effectively remove organic matters, nitrogen, phosphorus and other pollutants in sewage, is suitable for polluted water bodies such as rivers, lakes and the like with slow flow speed and wide river channels, and is suitable for ecological remediation and treatment of rivers of inferior V-class water bodies; has no negative effect on the drainage and flood control functions of the treated water area.

Drawings

Fig. 1 is a schematic structural diagram of the in-situ biochemical repair system provided by the present invention.

Detailed Description

The utility model provides a biochemical repair system of normal position, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the following refers to the attached drawing and the embodiment of lifting is the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1, the present invention provides an in-situ biochemical remediation system, which includes an A2O oxidation ditch 1 and an artificial aquatic plant zone 2 sequentially arranged along a water flow direction, and microbial strains, plankton, algae, fish and aquatic plants cultivated in a water body; the A2O oxidation ditch 1 comprises an anaerobic zone 11, an anoxic zone 12, an aerobic zone 13 and a settling zone 14 which are sequentially arranged along the water flow direction.

In the system, the sewage treatment capacity of the oxidation ditch is large, the sewage treatment effect is good and stable, and the anti-pollution load capacity of the oxidation ditch process is strong. The cultured microbial strains, plankton and algae ingesting the water body can decompose organic matters in water and digest rich nutrient substances in the water body, and various organic matters undergo chemical reaction under the action of microbial enzymes in an aerobic or anaerobic process and are gradually degraded, so that the water body is transparent, and good conditions are created for planting submerged plants. The number of plankton can be controlled to the fish of input, constructs complete water ecological food chain, carries out material migration conversion and the step-by-step transfer of energy through many food chains, decomposes the organic pollutant in the water and converts the ammonia nitrogen in the water into animal protein and vegetable protein ashore. The planted emergent aquatic plants, floating plants, submerged plants and other aquatic plants can absorb rich nutrients such as nitrogen and phosphorus, the nitrification and denitrification processes in the water body are enhanced, the purpose of eliminating total nitrogen in the water body is achieved, meanwhile, the sedimentation of suspended matters can be promoted, the resuspension of bottom sludge is inhibited, and the release of nitrogen and phosphorus nutritive salts of the bottom sludge is greatly reduced; in addition, the eutrophic system with strong root systems of aquatic plants can provide aerobic conditions for microorganisms and animals and promote the microorganisms and the animals to purify water.

Specifically, overflow dams 15 are respectively arranged between the anaerobic zone 11 and the anoxic zone 12 and between the aerobic zone 13 and the sedimentation zone 14; used for separating water bodies in the anaerobic zone and the anoxic zone, the aerobic zone and the sedimentation zone respectively.

More specifically, be equipped with geomembrane 3 between settling zone 14 and the biological area 2 of artificial pasture and water, separate sedimentation tank and the biological area of artificial pasture and water, artifical pasture and water is densely covered in the biological area of artificial pasture and water for consolidate the treatment effect of the oxidation ditch when the torrential rain period rivers are too fast.

A garbage oil removing device 111 and a plurality of first submersible propellers 112 are arranged in the anaerobic zone 11; the anaerobic zone is dug deeply, and a garbage oil removing device is used for removing solid garbage, waste oil and the like in the water body so as to meet the anaerobic condition of the anaerobic zone; the submersible propeller can provide strong water flow with low tangential flow, can fully mix sewage and activated sludge, prevents sludge from settling, and improves the water circulation, nitrification, denitrification and dephosphorization effects in the anaerobic zone.

The anoxic zone 12 is provided with a plurality of stirrers 121, and the stirrers 121 are respectively arranged on two sides of the water body near the anaerobic zone 11 or the aerobic zone 13 to balance the water body in the anoxic zone.

The aerobic zone 13 is provided with a microporous aeration device 133 and a plurality of flow baffle plates 131 along the flowing direction of the water body, and a second submersible propeller 132 and a plurality of aeration pipes (not shown in the figure) are respectively arranged between two adjacent flow baffle plates 131, so that the retention time of the water body in the aerobic zone is prolonged, the dissolved oxygen in the water body is increased, and the aerobic treatment effect is improved. In this embodiment, the flow baffle is made of geomembrane.

Further, a sewage pump 134 for returning sewage to the anoxic zone 12 is arranged in the aerobic zone 13, and in the anoxic tank, denitrifying bacteria take organic matters in the sewage as a carbon source to bring a large amount of NO into the returned mixed liquid₃-N and NO₂Reduction of-N to N₂Released to the air, hence BOD₅Decrease in concentration, NO₃The concentration of-N is greatly reduced.

A sludge pump 141 for returning sludge to the anaerobic zone 11 is arranged in the settling zone 14; the sludge pump returns the activated sludge in the settling zone to the anaerobic zone so as to ensure the activated sludge amount of the whole system.

The aquatic plants comprise emergent aquatic plants, floating plants and submerged plants; the decomposition of the aquatic plants on nitrogen, phosphorus and other eutrophic substances in the water body is enhanced in a three-dimensional manner, and the purification effect of the aquatic plants on the water body is improved.

In one embodiment, a river with a poor V-class water body with a slow water flow is selected, an A2O oxidation ditch is arranged at a black and odor concentration point of the river to culture bacteria and treat river sewage, a garbage and oil removing device and two first submersible propellers are arranged in an anaerobic zone, three stirrers are arranged in an anoxic tank, one end close to the anaerobic zone is respectively arranged at two sides of the river, and one end close to an aerobic zone is arranged. The aerobic zone is provided with a plurality of geomembranes which are obliquely arranged along the water flow direction, and the aerobic zone is divided into a plurality of small sections. A second submersible propeller and a plurality of aeration pipes communicated with the microporous aeration device are arranged between every two geomembranes, and a sewage pump is arranged in the aerobic zone to return sewage in the aerobic zone to the anoxic zone. The sedimentation zone is provided with two sludge pumps which are used for one purpose and one standby purpose, most sludge is returned to the anaerobic zone, and the residual sludge is handed to qualified enterprises for treatment.

Arranging artificial aquatic weed biological zones behind the sedimentation tank, densely distributing artificial aquatic weeds, planting emergent aquatic plants, floating plants and submerged plants in the polluted water area, simultaneously cultivating plankton, microbial strains, ingesting algae in the water area, and throwing fish to construct a water body ecological restoration system of the polluted water area; after the water ecological restoration system is stable, the system is adaptively adjusted to ensure that the sewage concentration of the anaerobic area is enough to provide sufficient nutrition for microorganisms, and if the water eutrophication of the river is not serious, other more nutritious water bodies such as waste water of a culturing farm and the like are introduced to ensure the nutrition required by the survival of the microorganisms, so that the system can stably run for a long time and maintain good water quality.

The polluted water area treated by the system has clear water quality, more than or equal to 5mg/L of dissolved oxygen, less than 20mg/L of COD and BOD₅Less than 4mg/L, ammonia nitrogen less than 0.3mg/L and total phosphorus less than 0.05 mg/L.

It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.

Claims

1. An in-situ biochemical remediation system is characterized by comprising an A2O oxidation ditch and an artificial aquatic plant biological zone which are sequentially arranged along the water flow direction, and microbial strains, plankton, algae, fishes and aquatic plants which are cultured in a water body; the A2O oxidation ditch comprises an anaerobic zone, an anoxic zone, an aerobic zone and a sedimentation zone which are sequentially arranged along the water flow direction.

2. The in situ biochemical remediation system of claim 1 wherein an overflow dam is provided between the anaerobic zone and the anoxic zone, and between the aerobic zone and the settling zone, respectively.

3. The in situ biochemical remediation system of claim 1 wherein a geomembrane is disposed between the settling zone and the artificial aquatic weed biozone.

4. The in situ biochemical remediation system of claim 1 wherein the anaerobic zone has disposed therein a waste oil removal device and a plurality of first submersible thrusters.

5. The in-situ biochemical remediation system of claim 1 wherein the anoxic zone has a plurality of agitators disposed therein, the agitators being disposed adjacent respective banks of the body of water at the anaerobic or aerobic zone.

6. The in situ biochemical remediation system of claim 1, wherein the aerobic zone comprises a microporous aeration device and a plurality of flow baffles along the flow direction of the water, and a second submersible propeller and a plurality of aeration pipes are respectively disposed between two adjacent flow baffles.

7. The in situ biochemical remediation system of claim 1 wherein the aerobic zone further comprises a sewage pump for pumping sewage to the anoxic zone.

8. The in situ biochemical remediation system of claim 1 wherein the settling zone has a sludge pump disposed therein for returning sludge to the anaerobic zone.

9. The in situ biochemical remediation system of claim 1 wherein the aquatic plant comprises an emergent aquatic plant, a floating aquatic plant, and a submerged aquatic plant.